@@ -6738,6 +6738,15 @@ T: git git://anongit.freedesktop.org/drm/drm-misc
F: Documentation/devicetree/bindings/display/panel/samsung,lms397kf04.yaml
F: drivers/gpu/drm/panel/panel-samsung-db7430.c
+DRM DRIVER FOR SAMSUNG MIPI DSIM BRIDGE
+M: Inki Dae <inki.dae@samsung.com>
+M: Jagan Teki <jagan@amarulasolutions.com>
+M: Marek Szyprowski <m.szyprowski@samsung.com>
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/bridge/samsung-dsim.c
+F: include/drm/bridge/samsung-dsim.h
+
DRM DRIVER FOR SAMSUNG S6D27A1 PANELS
M: Markuss Broks <markuss.broks@gmail.com>
S: Maintained
@@ -220,6 +220,18 @@ config DRM_PARADE_PS8640
The PS8640 is a high-performance and low-power
MIPI DSI to eDP converter
+config DRM_SAMSUNG_DSIM
+ tristate "Samsung MIPI DSIM bridge driver"
+ depends on COMMON_CLK
+ depends on OF && HAS_IOMEM
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select DRM_PANEL_BRIDGE
+ help
+ The Samsung MIPI DSIM bridge controller driver.
+ This MIPI DSIM bridge can be found it on Exynos SoCs and
+ NXP's i.MX8M Mini/Nano.
+
config DRM_SIL_SII8620
tristate "Silicon Image SII8620 HDMI/MHL bridge"
depends on OF
@@ -14,6 +14,7 @@ obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v
obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o
+obj-$(CONFIG_DRM_SAMSUNG_DSIM) += samsung-dsim.o
obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o
obj-$(CONFIG_DRM_SII902X) += sii902x.o
obj-$(CONFIG_DRM_SII9234) += sii9234.o
new file mode 100644
@@ -0,0 +1,1855 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Samsung MIPI DSIM bridge driver.
+ *
+ * Copyright (C) 2021 Amarula Solutions(India)
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ * Author: Jagan Teki <jagan@amarulasolutions.com>
+ *
+ * Based on exynos_drm_dsi from
+ * Tomasz Figa <t.figa@samsung.com>
+ */
+
+#include <asm/unaligned.h>
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/media-bus-format.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/bridge/samsung-dsim.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+
+/* returns true iff both arguments logically differs */
+#define NEQV(a, b) (!(a) ^ !(b))
+
+/* DSIM_STATUS */
+#define DSIM_STOP_STATE_DAT(x) (((x) & 0xf) << 0)
+#define DSIM_STOP_STATE_CLK BIT(8)
+#define DSIM_TX_READY_HS_CLK BIT(10)
+#define DSIM_PLL_STABLE BIT(31)
+
+/* DSIM_SWRST */
+#define DSIM_FUNCRST BIT(16)
+#define DSIM_SWRST BIT(0)
+
+/* DSIM_TIMEOUT */
+#define DSIM_LPDR_TIMEOUT(x) ((x) << 0)
+#define DSIM_BTA_TIMEOUT(x) ((x) << 16)
+
+/* DSIM_CLKCTRL */
+#define DSIM_ESC_PRESCALER(x) (((x) & 0xffff) << 0)
+#define DSIM_ESC_PRESCALER_MASK (0xffff << 0)
+#define DSIM_LANE_ESC_CLK_EN_CLK BIT(19)
+#define DSIM_LANE_ESC_CLK_EN_DATA(x) (((x) & 0xf) << 20)
+#define DSIM_LANE_ESC_CLK_EN_DATA_MASK (0xf << 20)
+#define DSIM_BYTE_CLKEN BIT(24)
+#define DSIM_BYTE_CLK_SRC(x) (((x) & 0x3) << 25)
+#define DSIM_BYTE_CLK_SRC_MASK (0x3 << 25)
+#define DSIM_PLL_BYPASS BIT(27)
+#define DSIM_ESC_CLKEN BIT(28)
+#define DSIM_TX_REQUEST_HSCLK BIT(31)
+
+/* DSIM_CONFIG */
+#define DSIM_LANE_EN_CLK BIT(0)
+#define DSIM_LANE_EN(x) (((x) & 0xf) << 1)
+#define DSIM_NUM_OF_DATA_LANE(x) (((x) & 0x3) << 5)
+#define DSIM_SUB_PIX_FORMAT(x) (((x) & 0x7) << 8)
+#define DSIM_MAIN_PIX_FORMAT_MASK (0x7 << 12)
+#define DSIM_MAIN_PIX_FORMAT_RGB888 (0x7 << 12)
+#define DSIM_MAIN_PIX_FORMAT_RGB666 (0x6 << 12)
+#define DSIM_MAIN_PIX_FORMAT_RGB666_P (0x5 << 12)
+#define DSIM_MAIN_PIX_FORMAT_RGB565 (0x4 << 12)
+#define DSIM_SUB_VC (((x) & 0x3) << 16)
+#define DSIM_MAIN_VC (((x) & 0x3) << 18)
+#define DSIM_HSA_DISABLE_MODE BIT(20)
+#define DSIM_HBP_DISABLE_MODE BIT(21)
+#define DSIM_HFP_DISABLE_MODE BIT(22)
+/*
+ * The i.MX 8M Mini Applications Processor Reference Manual,
+ * Rev. 3, 11/2020 Page 4091
+ * The i.MX 8M Nano Applications Processor Reference Manual,
+ * Rev. 2, 07/2022 Page 3058
+ * The i.MX 8M Plus Applications Processor Reference Manual,
+ * Rev. 1, 06/2021 Page 5436
+ * all claims this bit is 'HseDisableMode' with the definition
+ * 0 = Disables transfer
+ * 1 = Enables transfer
+ *
+ * This clearly states that HSE is not a disabled bit.
+ *
+ * The naming convention follows as per the manual and the
+ * driver logic is based on the MIPI_DSI_MODE_VIDEO_HSE flag.
+ */
+#define DSIM_HSE_DISABLE_MODE BIT(23)
+#define DSIM_AUTO_MODE BIT(24)
+#define DSIM_VIDEO_MODE BIT(25)
+#define DSIM_BURST_MODE BIT(26)
+#define DSIM_SYNC_INFORM BIT(27)
+#define DSIM_EOT_DISABLE BIT(28)
+#define DSIM_MFLUSH_VS BIT(29)
+/* This flag is valid only for exynos3250/3472/5260/5430 */
+#define DSIM_CLKLANE_STOP BIT(30)
+
+/* DSIM_ESCMODE */
+#define DSIM_TX_TRIGGER_RST BIT(4)
+#define DSIM_TX_LPDT_LP BIT(6)
+#define DSIM_CMD_LPDT_LP BIT(7)
+#define DSIM_FORCE_BTA BIT(16)
+#define DSIM_FORCE_STOP_STATE BIT(20)
+#define DSIM_STOP_STATE_CNT(x) (((x) & 0x7ff) << 21)
+#define DSIM_STOP_STATE_CNT_MASK (0x7ff << 21)
+
+/* DSIM_MDRESOL */
+#define DSIM_MAIN_STAND_BY BIT(31)
+#define DSIM_MAIN_VRESOL(x, num_bits) (((x) & ((1 << (num_bits)) - 1)) << 16)
+#define DSIM_MAIN_HRESOL(x, num_bits) (((x) & ((1 << (num_bits)) - 1)) << 0)
+
+/* DSIM_MVPORCH */
+#define DSIM_CMD_ALLOW(x) ((x) << 28)
+#define DSIM_STABLE_VFP(x) ((x) << 16)
+#define DSIM_MAIN_VBP(x) ((x) << 0)
+#define DSIM_CMD_ALLOW_MASK (0xf << 28)
+#define DSIM_STABLE_VFP_MASK (0x7ff << 16)
+#define DSIM_MAIN_VBP_MASK (0x7ff << 0)
+
+/* DSIM_MHPORCH */
+#define DSIM_MAIN_HFP(x) ((x) << 16)
+#define DSIM_MAIN_HBP(x) ((x) << 0)
+#define DSIM_MAIN_HFP_MASK ((0xffff) << 16)
+#define DSIM_MAIN_HBP_MASK ((0xffff) << 0)
+
+/* DSIM_MSYNC */
+#define DSIM_MAIN_VSA(x) ((x) << 22)
+#define DSIM_MAIN_HSA(x) ((x) << 0)
+#define DSIM_MAIN_VSA_MASK ((0x3ff) << 22)
+#define DSIM_MAIN_HSA_MASK ((0xffff) << 0)
+
+/* DSIM_SDRESOL */
+#define DSIM_SUB_STANDY(x) ((x) << 31)
+#define DSIM_SUB_VRESOL(x) ((x) << 16)
+#define DSIM_SUB_HRESOL(x) ((x) << 0)
+#define DSIM_SUB_STANDY_MASK ((0x1) << 31)
+#define DSIM_SUB_VRESOL_MASK ((0x7ff) << 16)
+#define DSIM_SUB_HRESOL_MASK ((0x7ff) << 0)
+
+/* DSIM_INTSRC */
+#define DSIM_INT_PLL_STABLE BIT(31)
+#define DSIM_INT_SW_RST_RELEASE BIT(30)
+#define DSIM_INT_SFR_FIFO_EMPTY BIT(29)
+#define DSIM_INT_SFR_HDR_FIFO_EMPTY BIT(28)
+#define DSIM_INT_BTA BIT(25)
+#define DSIM_INT_FRAME_DONE BIT(24)
+#define DSIM_INT_RX_TIMEOUT BIT(21)
+#define DSIM_INT_BTA_TIMEOUT BIT(20)
+#define DSIM_INT_RX_DONE BIT(18)
+#define DSIM_INT_RX_TE BIT(17)
+#define DSIM_INT_RX_ACK BIT(16)
+#define DSIM_INT_RX_ECC_ERR BIT(15)
+#define DSIM_INT_RX_CRC_ERR BIT(14)
+
+/* DSIM_FIFOCTRL */
+#define DSIM_RX_DATA_FULL BIT(25)
+#define DSIM_RX_DATA_EMPTY BIT(24)
+#define DSIM_SFR_HEADER_FULL BIT(23)
+#define DSIM_SFR_HEADER_EMPTY BIT(22)
+#define DSIM_SFR_PAYLOAD_FULL BIT(21)
+#define DSIM_SFR_PAYLOAD_EMPTY BIT(20)
+#define DSIM_I80_HEADER_FULL BIT(19)
+#define DSIM_I80_HEADER_EMPTY BIT(18)
+#define DSIM_I80_PAYLOAD_FULL BIT(17)
+#define DSIM_I80_PAYLOAD_EMPTY BIT(16)
+#define DSIM_SD_HEADER_FULL BIT(15)
+#define DSIM_SD_HEADER_EMPTY BIT(14)
+#define DSIM_SD_PAYLOAD_FULL BIT(13)
+#define DSIM_SD_PAYLOAD_EMPTY BIT(12)
+#define DSIM_MD_HEADER_FULL BIT(11)
+#define DSIM_MD_HEADER_EMPTY BIT(10)
+#define DSIM_MD_PAYLOAD_FULL BIT(9)
+#define DSIM_MD_PAYLOAD_EMPTY BIT(8)
+#define DSIM_RX_FIFO BIT(4)
+#define DSIM_SFR_FIFO BIT(3)
+#define DSIM_I80_FIFO BIT(2)
+#define DSIM_SD_FIFO BIT(1)
+#define DSIM_MD_FIFO BIT(0)
+
+/* DSIM_PHYACCHR */
+#define DSIM_AFC_EN BIT(14)
+#define DSIM_AFC_CTL(x) (((x) & 0x7) << 5)
+
+/* DSIM_PLLCTRL */
+#define DSIM_FREQ_BAND(x) ((x) << 24)
+#define DSIM_PLL_EN BIT(23)
+#define DSIM_PLL_P(x, offset) ((x) << (offset))
+#define DSIM_PLL_M(x) ((x) << 4)
+#define DSIM_PLL_S(x) ((x) << 1)
+
+/* DSIM_PHYCTRL */
+#define DSIM_PHYCTRL_ULPS_EXIT(x) (((x) & 0x1ff) << 0)
+#define DSIM_PHYCTRL_B_DPHYCTL_VREG_LP BIT(30)
+#define DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP BIT(14)
+
+/* DSIM_PHYTIMING */
+#define DSIM_PHYTIMING_LPX(x) ((x) << 8)
+#define DSIM_PHYTIMING_HS_EXIT(x) ((x) << 0)
+
+/* DSIM_PHYTIMING1 */
+#define DSIM_PHYTIMING1_CLK_PREPARE(x) ((x) << 24)
+#define DSIM_PHYTIMING1_CLK_ZERO(x) ((x) << 16)
+#define DSIM_PHYTIMING1_CLK_POST(x) ((x) << 8)
+#define DSIM_PHYTIMING1_CLK_TRAIL(x) ((x) << 0)
+
+/* DSIM_PHYTIMING2 */
+#define DSIM_PHYTIMING2_HS_PREPARE(x) ((x) << 16)
+#define DSIM_PHYTIMING2_HS_ZERO(x) ((x) << 8)
+#define DSIM_PHYTIMING2_HS_TRAIL(x) ((x) << 0)
+
+#define DSI_MAX_BUS_WIDTH 4
+#define DSI_NUM_VIRTUAL_CHANNELS 4
+#define DSI_TX_FIFO_SIZE 2048
+#define DSI_RX_FIFO_SIZE 256
+#define DSI_XFER_TIMEOUT_MS 100
+#define DSI_RX_FIFO_EMPTY 0x30800002
+
+#define OLD_SCLK_MIPI_CLK_NAME "pll_clk"
+
+static const char *const clk_names[5] = {
+ "bus_clk",
+ "sclk_mipi",
+ "phyclk_mipidphy0_bitclkdiv8",
+ "phyclk_mipidphy0_rxclkesc0",
+ "sclk_rgb_vclk_to_dsim0"
+};
+
+enum samsung_dsim_transfer_type {
+ EXYNOS_DSI_TX,
+ EXYNOS_DSI_RX,
+};
+
+enum reg_idx {
+ DSIM_STATUS_REG, /* Status register */
+ DSIM_SWRST_REG, /* Software reset register */
+ DSIM_CLKCTRL_REG, /* Clock control register */
+ DSIM_TIMEOUT_REG, /* Time out register */
+ DSIM_CONFIG_REG, /* Configuration register */
+ DSIM_ESCMODE_REG, /* Escape mode register */
+ DSIM_MDRESOL_REG,
+ DSIM_MVPORCH_REG, /* Main display Vporch register */
+ DSIM_MHPORCH_REG, /* Main display Hporch register */
+ DSIM_MSYNC_REG, /* Main display sync area register */
+ DSIM_INTSRC_REG, /* Interrupt source register */
+ DSIM_INTMSK_REG, /* Interrupt mask register */
+ DSIM_PKTHDR_REG, /* Packet Header FIFO register */
+ DSIM_PAYLOAD_REG, /* Payload FIFO register */
+ DSIM_RXFIFO_REG, /* Read FIFO register */
+ DSIM_FIFOCTRL_REG, /* FIFO status and control register */
+ DSIM_PLLCTRL_REG, /* PLL control register */
+ DSIM_PHYCTRL_REG,
+ DSIM_PHYTIMING_REG,
+ DSIM_PHYTIMING1_REG,
+ DSIM_PHYTIMING2_REG,
+ NUM_REGS
+};
+
+static const unsigned int exynos_reg_ofs[] = {
+ [DSIM_STATUS_REG] = 0x00,
+ [DSIM_SWRST_REG] = 0x04,
+ [DSIM_CLKCTRL_REG] = 0x08,
+ [DSIM_TIMEOUT_REG] = 0x0c,
+ [DSIM_CONFIG_REG] = 0x10,
+ [DSIM_ESCMODE_REG] = 0x14,
+ [DSIM_MDRESOL_REG] = 0x18,
+ [DSIM_MVPORCH_REG] = 0x1c,
+ [DSIM_MHPORCH_REG] = 0x20,
+ [DSIM_MSYNC_REG] = 0x24,
+ [DSIM_INTSRC_REG] = 0x2c,
+ [DSIM_INTMSK_REG] = 0x30,
+ [DSIM_PKTHDR_REG] = 0x34,
+ [DSIM_PAYLOAD_REG] = 0x38,
+ [DSIM_RXFIFO_REG] = 0x3c,
+ [DSIM_FIFOCTRL_REG] = 0x44,
+ [DSIM_PLLCTRL_REG] = 0x4c,
+ [DSIM_PHYCTRL_REG] = 0x5c,
+ [DSIM_PHYTIMING_REG] = 0x64,
+ [DSIM_PHYTIMING1_REG] = 0x68,
+ [DSIM_PHYTIMING2_REG] = 0x6c,
+};
+
+static const unsigned int exynos5433_reg_ofs[] = {
+ [DSIM_STATUS_REG] = 0x04,
+ [DSIM_SWRST_REG] = 0x0C,
+ [DSIM_CLKCTRL_REG] = 0x10,
+ [DSIM_TIMEOUT_REG] = 0x14,
+ [DSIM_CONFIG_REG] = 0x18,
+ [DSIM_ESCMODE_REG] = 0x1C,
+ [DSIM_MDRESOL_REG] = 0x20,
+ [DSIM_MVPORCH_REG] = 0x24,
+ [DSIM_MHPORCH_REG] = 0x28,
+ [DSIM_MSYNC_REG] = 0x2C,
+ [DSIM_INTSRC_REG] = 0x34,
+ [DSIM_INTMSK_REG] = 0x38,
+ [DSIM_PKTHDR_REG] = 0x3C,
+ [DSIM_PAYLOAD_REG] = 0x40,
+ [DSIM_RXFIFO_REG] = 0x44,
+ [DSIM_FIFOCTRL_REG] = 0x4C,
+ [DSIM_PLLCTRL_REG] = 0x94,
+ [DSIM_PHYCTRL_REG] = 0xA4,
+ [DSIM_PHYTIMING_REG] = 0xB4,
+ [DSIM_PHYTIMING1_REG] = 0xB8,
+ [DSIM_PHYTIMING2_REG] = 0xBC,
+};
+
+enum reg_value_idx {
+ RESET_TYPE,
+ PLL_TIMER,
+ STOP_STATE_CNT,
+ PHYCTRL_ULPS_EXIT,
+ PHYCTRL_VREG_LP,
+ PHYCTRL_SLEW_UP,
+ PHYTIMING_LPX,
+ PHYTIMING_HS_EXIT,
+ PHYTIMING_CLK_PREPARE,
+ PHYTIMING_CLK_ZERO,
+ PHYTIMING_CLK_POST,
+ PHYTIMING_CLK_TRAIL,
+ PHYTIMING_HS_PREPARE,
+ PHYTIMING_HS_ZERO,
+ PHYTIMING_HS_TRAIL
+};
+
+static const unsigned int reg_values[] = {
+ [RESET_TYPE] = DSIM_SWRST,
+ [PLL_TIMER] = 500,
+ [STOP_STATE_CNT] = 0xf,
+ [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0x0af),
+ [PHYCTRL_VREG_LP] = 0,
+ [PHYCTRL_SLEW_UP] = 0,
+ [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x06),
+ [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0b),
+ [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x07),
+ [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x27),
+ [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0d),
+ [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x08),
+ [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x09),
+ [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x0d),
+ [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0b),
+};
+
+static const unsigned int exynos5422_reg_values[] = {
+ [RESET_TYPE] = DSIM_SWRST,
+ [PLL_TIMER] = 500,
+ [STOP_STATE_CNT] = 0xf,
+ [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0xaf),
+ [PHYCTRL_VREG_LP] = 0,
+ [PHYCTRL_SLEW_UP] = 0,
+ [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x08),
+ [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0d),
+ [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x09),
+ [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x30),
+ [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0e),
+ [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x0a),
+ [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x0c),
+ [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x11),
+ [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0d),
+};
+
+static const unsigned int exynos5433_reg_values[] = {
+ [RESET_TYPE] = DSIM_FUNCRST,
+ [PLL_TIMER] = 22200,
+ [STOP_STATE_CNT] = 0xa,
+ [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0x190),
+ [PHYCTRL_VREG_LP] = DSIM_PHYCTRL_B_DPHYCTL_VREG_LP,
+ [PHYCTRL_SLEW_UP] = DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP,
+ [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x07),
+ [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0c),
+ [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x09),
+ [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x2d),
+ [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0e),
+ [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x09),
+ [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x0b),
+ [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x10),
+ [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0c),
+};
+
+static const struct samsung_dsim_driver_data exynos3_dsi_driver_data = {
+ .reg_ofs = exynos_reg_ofs,
+ .plltmr_reg = 0x50,
+ .has_freqband = 1,
+ .has_clklane_stop = 1,
+ .num_clks = 2,
+ .max_freq = 1000,
+ .wait_for_reset = 1,
+ .num_bits_resol = 11,
+ .pll_p_offset = 13,
+ .reg_values = reg_values,
+};
+
+static const struct samsung_dsim_driver_data exynos4_dsi_driver_data = {
+ .reg_ofs = exynos_reg_ofs,
+ .plltmr_reg = 0x50,
+ .has_freqband = 1,
+ .has_clklane_stop = 1,
+ .num_clks = 2,
+ .max_freq = 1000,
+ .wait_for_reset = 1,
+ .num_bits_resol = 11,
+ .pll_p_offset = 13,
+ .reg_values = reg_values,
+};
+
+static const struct samsung_dsim_driver_data exynos5_dsi_driver_data = {
+ .reg_ofs = exynos_reg_ofs,
+ .plltmr_reg = 0x58,
+ .num_clks = 2,
+ .max_freq = 1000,
+ .wait_for_reset = 1,
+ .num_bits_resol = 11,
+ .pll_p_offset = 13,
+ .reg_values = reg_values,
+};
+
+static const struct samsung_dsim_driver_data exynos5433_dsi_driver_data = {
+ .reg_ofs = exynos5433_reg_ofs,
+ .plltmr_reg = 0xa0,
+ .has_clklane_stop = 1,
+ .num_clks = 5,
+ .max_freq = 1500,
+ .wait_for_reset = 0,
+ .num_bits_resol = 12,
+ .pll_p_offset = 13,
+ .reg_values = exynos5433_reg_values,
+};
+
+static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = {
+ .reg_ofs = exynos5433_reg_ofs,
+ .plltmr_reg = 0xa0,
+ .has_clklane_stop = 1,
+ .num_clks = 2,
+ .max_freq = 1500,
+ .wait_for_reset = 1,
+ .num_bits_resol = 12,
+ .pll_p_offset = 13,
+ .reg_values = exynos5422_reg_values,
+};
+
+static const struct samsung_dsim_driver_data *
+samsung_dsim_types[DSIM_TYPE_COUNT] = {
+ [DSIM_TYPE_EXYNOS3250] = &exynos3_dsi_driver_data,
+ [DSIM_TYPE_EXYNOS4210] = &exynos4_dsi_driver_data,
+ [DSIM_TYPE_EXYNOS5410] = &exynos5_dsi_driver_data,
+ [DSIM_TYPE_EXYNOS5422] = &exynos5422_dsi_driver_data,
+ [DSIM_TYPE_EXYNOS5433] = &exynos5433_dsi_driver_data,
+};
+
+static inline struct samsung_dsim *host_to_dsi(struct mipi_dsi_host *h)
+{
+ return container_of(h, struct samsung_dsim, dsi_host);
+}
+
+static inline struct samsung_dsim *bridge_to_dsi(struct drm_bridge *b)
+{
+ return container_of(b, struct samsung_dsim, bridge);
+}
+
+static inline void samsung_dsim_write(struct samsung_dsim *dsi,
+ enum reg_idx idx, u32 val)
+{
+ writel(val, dsi->reg_base + dsi->driver_data->reg_ofs[idx]);
+}
+
+static inline u32 samsung_dsim_read(struct samsung_dsim *dsi, enum reg_idx idx)
+{
+ return readl(dsi->reg_base + dsi->driver_data->reg_ofs[idx]);
+}
+
+static void samsung_dsim_wait_for_reset(struct samsung_dsim *dsi)
+{
+ if (wait_for_completion_timeout(&dsi->completed, msecs_to_jiffies(300)))
+ return;
+
+ dev_err(dsi->dev, "timeout waiting for reset\n");
+}
+
+static void samsung_dsim_reset(struct samsung_dsim *dsi)
+{
+ u32 reset_val = dsi->driver_data->reg_values[RESET_TYPE];
+
+ reinit_completion(&dsi->completed);
+ samsung_dsim_write(dsi, DSIM_SWRST_REG, reset_val);
+}
+
+#ifndef MHZ
+#define MHZ (1000 * 1000)
+#endif
+
+static unsigned long samsung_dsim_pll_find_pms(struct samsung_dsim *dsi,
+ unsigned long fin,
+ unsigned long fout,
+ u8 *p, u16 *m, u8 *s)
+{
+ const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
+ unsigned long best_freq = 0;
+ u32 min_delta = 0xffffffff;
+ u8 p_min, p_max;
+ u8 _p, best_p;
+ u16 _m, best_m;
+ u8 _s, best_s;
+
+ p_min = DIV_ROUND_UP(fin, (12 * MHZ));
+ p_max = fin / (6 * MHZ);
+
+ for (_p = p_min; _p <= p_max; ++_p) {
+ for (_s = 0; _s <= 5; ++_s) {
+ u64 tmp;
+ u32 delta;
+
+ tmp = (u64)fout * (_p << _s);
+ do_div(tmp, fin);
+ _m = tmp;
+ if (_m < 41 || _m > 125)
+ continue;
+
+ tmp = (u64)_m * fin;
+ do_div(tmp, _p);
+ if (tmp < 500 * MHZ ||
+ tmp > driver_data->max_freq * MHZ)
+ continue;
+
+ tmp = (u64)_m * fin;
+ do_div(tmp, _p << _s);
+
+ delta = abs(fout - tmp);
+ if (delta < min_delta) {
+ best_p = _p;
+ best_m = _m;
+ best_s = _s;
+ min_delta = delta;
+ best_freq = tmp;
+ }
+ }
+ }
+
+ if (best_freq) {
+ *p = best_p;
+ *m = best_m;
+ *s = best_s;
+ }
+
+ return best_freq;
+}
+
+static unsigned long samsung_dsim_set_pll(struct samsung_dsim *dsi,
+ unsigned long freq)
+{
+ const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
+ unsigned long fin, fout;
+ int timeout;
+ u8 p, s;
+ u16 m;
+ u32 reg;
+
+ fin = dsi->pll_clk_rate;
+ fout = samsung_dsim_pll_find_pms(dsi, fin, freq, &p, &m, &s);
+ if (!fout) {
+ dev_err(dsi->dev,
+ "failed to find PLL PMS for requested frequency\n");
+ return 0;
+ }
+ dev_dbg(dsi->dev, "PLL freq %lu, (p %d, m %d, s %d)\n", fout, p, m, s);
+
+ writel(driver_data->reg_values[PLL_TIMER],
+ dsi->reg_base + driver_data->plltmr_reg);
+
+ reg = DSIM_PLL_EN | DSIM_PLL_P(p, driver_data->pll_p_offset) |
+ DSIM_PLL_M(m) | DSIM_PLL_S(s);
+
+ if (driver_data->has_freqband) {
+ static const unsigned long freq_bands[] = {
+ 100 * MHZ, 120 * MHZ, 160 * MHZ, 200 * MHZ,
+ 270 * MHZ, 320 * MHZ, 390 * MHZ, 450 * MHZ,
+ 510 * MHZ, 560 * MHZ, 640 * MHZ, 690 * MHZ,
+ 770 * MHZ, 870 * MHZ, 950 * MHZ,
+ };
+ int band;
+
+ for (band = 0; band < ARRAY_SIZE(freq_bands); ++band)
+ if (fout < freq_bands[band])
+ break;
+
+ dev_dbg(dsi->dev, "band %d\n", band);
+
+ reg |= DSIM_FREQ_BAND(band);
+ }
+
+ samsung_dsim_write(dsi, DSIM_PLLCTRL_REG, reg);
+
+ timeout = 1000;
+ do {
+ if (timeout-- == 0) {
+ dev_err(dsi->dev, "PLL failed to stabilize\n");
+ return 0;
+ }
+ reg = samsung_dsim_read(dsi, DSIM_STATUS_REG);
+ } while ((reg & DSIM_PLL_STABLE) == 0);
+
+ return fout;
+}
+
+static int samsung_dsim_enable_clock(struct samsung_dsim *dsi)
+{
+ unsigned long hs_clk, byte_clk, esc_clk;
+ unsigned long esc_div;
+ u32 reg;
+
+ hs_clk = samsung_dsim_set_pll(dsi, dsi->burst_clk_rate);
+ if (!hs_clk) {
+ dev_err(dsi->dev, "failed to configure DSI PLL\n");
+ return -EFAULT;
+ }
+
+ byte_clk = hs_clk / 8;
+ esc_div = DIV_ROUND_UP(byte_clk, dsi->esc_clk_rate);
+ esc_clk = byte_clk / esc_div;
+
+ if (esc_clk > 20 * MHZ) {
+ ++esc_div;
+ esc_clk = byte_clk / esc_div;
+ }
+
+ dev_dbg(dsi->dev, "hs_clk = %lu, byte_clk = %lu, esc_clk = %lu\n",
+ hs_clk, byte_clk, esc_clk);
+
+ reg = samsung_dsim_read(dsi, DSIM_CLKCTRL_REG);
+ reg &= ~(DSIM_ESC_PRESCALER_MASK | DSIM_LANE_ESC_CLK_EN_CLK
+ | DSIM_LANE_ESC_CLK_EN_DATA_MASK | DSIM_PLL_BYPASS
+ | DSIM_BYTE_CLK_SRC_MASK);
+ reg |= DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN
+ | DSIM_ESC_PRESCALER(esc_div)
+ | DSIM_LANE_ESC_CLK_EN_CLK
+ | DSIM_LANE_ESC_CLK_EN_DATA(BIT(dsi->lanes) - 1)
+ | DSIM_BYTE_CLK_SRC(0)
+ | DSIM_TX_REQUEST_HSCLK;
+ samsung_dsim_write(dsi, DSIM_CLKCTRL_REG, reg);
+
+ return 0;
+}
+
+static void samsung_dsim_set_phy_ctrl(struct samsung_dsim *dsi)
+{
+ const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
+ const unsigned int *reg_values = driver_data->reg_values;
+ u32 reg;
+
+ if (driver_data->has_freqband)
+ return;
+
+ /* B D-PHY: D-PHY Master & Slave Analog Block control */
+ reg = reg_values[PHYCTRL_ULPS_EXIT] | reg_values[PHYCTRL_VREG_LP] |
+ reg_values[PHYCTRL_SLEW_UP];
+ samsung_dsim_write(dsi, DSIM_PHYCTRL_REG, reg);
+
+ /*
+ * T LPX: Transmitted length of any Low-Power state period
+ * T HS-EXIT: Time that the transmitter drives LP-11 following a HS
+ * burst
+ */
+ reg = reg_values[PHYTIMING_LPX] | reg_values[PHYTIMING_HS_EXIT];
+ samsung_dsim_write(dsi, DSIM_PHYTIMING_REG, reg);
+
+ /*
+ * T CLK-PREPARE: Time that the transmitter drives the Clock Lane LP-00
+ * Line state immediately before the HS-0 Line state starting the
+ * HS transmission
+ * T CLK-ZERO: Time that the transmitter drives the HS-0 state prior to
+ * transmitting the Clock.
+ * T CLK_POST: Time that the transmitter continues to send HS clock
+ * after the last associated Data Lane has transitioned to LP Mode
+ * Interval is defined as the period from the end of T HS-TRAIL to
+ * the beginning of T CLK-TRAIL
+ * T CLK-TRAIL: Time that the transmitter drives the HS-0 state after
+ * the last payload clock bit of a HS transmission burst
+ */
+ reg = reg_values[PHYTIMING_CLK_PREPARE] |
+ reg_values[PHYTIMING_CLK_ZERO] |
+ reg_values[PHYTIMING_CLK_POST] |
+ reg_values[PHYTIMING_CLK_TRAIL];
+
+ samsung_dsim_write(dsi, DSIM_PHYTIMING1_REG, reg);
+
+ /*
+ * T HS-PREPARE: Time that the transmitter drives the Data Lane LP-00
+ * Line state immediately before the HS-0 Line state starting the
+ * HS transmission
+ * T HS-ZERO: Time that the transmitter drives the HS-0 state prior to
+ * transmitting the Sync sequence.
+ * T HS-TRAIL: Time that the transmitter drives the flipped differential
+ * state after last payload data bit of a HS transmission burst
+ */
+ reg = reg_values[PHYTIMING_HS_PREPARE] | reg_values[PHYTIMING_HS_ZERO] |
+ reg_values[PHYTIMING_HS_TRAIL];
+ samsung_dsim_write(dsi, DSIM_PHYTIMING2_REG, reg);
+}
+
+static void samsung_dsim_disable_clock(struct samsung_dsim *dsi)
+{
+ u32 reg;
+
+ reg = samsung_dsim_read(dsi, DSIM_CLKCTRL_REG);
+ reg &= ~(DSIM_LANE_ESC_CLK_EN_CLK | DSIM_LANE_ESC_CLK_EN_DATA_MASK
+ | DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN);
+ samsung_dsim_write(dsi, DSIM_CLKCTRL_REG, reg);
+
+ reg = samsung_dsim_read(dsi, DSIM_PLLCTRL_REG);
+ reg &= ~DSIM_PLL_EN;
+ samsung_dsim_write(dsi, DSIM_PLLCTRL_REG, reg);
+}
+
+static void samsung_dsim_enable_lane(struct samsung_dsim *dsi, u32 lane)
+{
+ u32 reg = samsung_dsim_read(dsi, DSIM_CONFIG_REG);
+
+ reg |= (DSIM_NUM_OF_DATA_LANE(dsi->lanes - 1) | DSIM_LANE_EN_CLK |
+ DSIM_LANE_EN(lane));
+ samsung_dsim_write(dsi, DSIM_CONFIG_REG, reg);
+}
+
+static int samsung_dsim_init_link(struct samsung_dsim *dsi)
+{
+ const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
+ int timeout;
+ u32 reg;
+ u32 lanes_mask;
+
+ /* Initialize FIFO pointers */
+ reg = samsung_dsim_read(dsi, DSIM_FIFOCTRL_REG);
+ reg &= ~0x1f;
+ samsung_dsim_write(dsi, DSIM_FIFOCTRL_REG, reg);
+
+ usleep_range(9000, 11000);
+
+ reg |= 0x1f;
+ samsung_dsim_write(dsi, DSIM_FIFOCTRL_REG, reg);
+ usleep_range(9000, 11000);
+
+ /* DSI configuration */
+ reg = 0;
+
+ /*
+ * The first bit of mode_flags specifies display configuration.
+ * If this bit is set[= MIPI_DSI_MODE_VIDEO], dsi will support video
+ * mode, otherwise it will support command mode.
+ */
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
+ reg |= DSIM_VIDEO_MODE;
+
+ /*
+ * The user manual describes that following bits are ignored in
+ * command mode.
+ */
+ if (!(dsi->mode_flags & MIPI_DSI_MODE_VSYNC_FLUSH))
+ reg |= DSIM_MFLUSH_VS;
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ reg |= DSIM_SYNC_INFORM;
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
+ reg |= DSIM_BURST_MODE;
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_AUTO_VERT)
+ reg |= DSIM_AUTO_MODE;
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HSE)
+ reg |= DSIM_HSE_DISABLE_MODE;
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HFP)
+ reg |= DSIM_HFP_DISABLE_MODE;
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HBP)
+ reg |= DSIM_HBP_DISABLE_MODE;
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HSA)
+ reg |= DSIM_HSA_DISABLE_MODE;
+ }
+
+ if (dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET)
+ reg |= DSIM_EOT_DISABLE;
+
+ switch (dsi->format) {
+ case MIPI_DSI_FMT_RGB888:
+ reg |= DSIM_MAIN_PIX_FORMAT_RGB888;
+ break;
+ case MIPI_DSI_FMT_RGB666:
+ reg |= DSIM_MAIN_PIX_FORMAT_RGB666;
+ break;
+ case MIPI_DSI_FMT_RGB666_PACKED:
+ reg |= DSIM_MAIN_PIX_FORMAT_RGB666_P;
+ break;
+ case MIPI_DSI_FMT_RGB565:
+ reg |= DSIM_MAIN_PIX_FORMAT_RGB565;
+ break;
+ default:
+ dev_err(dsi->dev, "invalid pixel format\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Use non-continuous clock mode if the periparal wants and
+ * host controller supports
+ *
+ * In non-continous clock mode, host controller will turn off
+ * the HS clock between high-speed transmissions to reduce
+ * power consumption.
+ */
+ if (driver_data->has_clklane_stop &&
+ dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
+ reg |= DSIM_CLKLANE_STOP;
+ samsung_dsim_write(dsi, DSIM_CONFIG_REG, reg);
+
+ lanes_mask = BIT(dsi->lanes) - 1;
+ samsung_dsim_enable_lane(dsi, lanes_mask);
+
+ /* Check clock and data lane state are stop state */
+ timeout = 100;
+ do {
+ if (timeout-- == 0) {
+ dev_err(dsi->dev, "waiting for bus lanes timed out\n");
+ return -EFAULT;
+ }
+
+ reg = samsung_dsim_read(dsi, DSIM_STATUS_REG);
+ if ((reg & DSIM_STOP_STATE_DAT(lanes_mask))
+ != DSIM_STOP_STATE_DAT(lanes_mask))
+ continue;
+ } while (!(reg & (DSIM_STOP_STATE_CLK | DSIM_TX_READY_HS_CLK)));
+
+ reg = samsung_dsim_read(dsi, DSIM_ESCMODE_REG);
+ reg &= ~DSIM_STOP_STATE_CNT_MASK;
+ reg |= DSIM_STOP_STATE_CNT(driver_data->reg_values[STOP_STATE_CNT]);
+ samsung_dsim_write(dsi, DSIM_ESCMODE_REG, reg);
+
+ reg = DSIM_BTA_TIMEOUT(0xff) | DSIM_LPDR_TIMEOUT(0xffff);
+ samsung_dsim_write(dsi, DSIM_TIMEOUT_REG, reg);
+
+ return 0;
+}
+
+static void samsung_dsim_set_display_mode(struct samsung_dsim *dsi)
+{
+ struct drm_display_mode *m = &dsi->mode;
+ unsigned int num_bits_resol = dsi->driver_data->num_bits_resol;
+ u32 reg;
+
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
+ reg = DSIM_CMD_ALLOW(0xf)
+ | DSIM_STABLE_VFP(m->vsync_start - m->vdisplay)
+ | DSIM_MAIN_VBP(m->vtotal - m->vsync_end);
+ samsung_dsim_write(dsi, DSIM_MVPORCH_REG, reg);
+
+ reg = DSIM_MAIN_HFP(m->hsync_start - m->hdisplay)
+ | DSIM_MAIN_HBP(m->htotal - m->hsync_end);
+ samsung_dsim_write(dsi, DSIM_MHPORCH_REG, reg);
+
+ reg = DSIM_MAIN_VSA(m->vsync_end - m->vsync_start)
+ | DSIM_MAIN_HSA(m->hsync_end - m->hsync_start);
+ samsung_dsim_write(dsi, DSIM_MSYNC_REG, reg);
+ }
+ reg = DSIM_MAIN_HRESOL(m->hdisplay, num_bits_resol) |
+ DSIM_MAIN_VRESOL(m->vdisplay, num_bits_resol);
+
+ samsung_dsim_write(dsi, DSIM_MDRESOL_REG, reg);
+
+ dev_dbg(dsi->dev, "LCD size = %dx%d\n", m->hdisplay, m->vdisplay);
+}
+
+static void samsung_dsim_set_display_enable(struct samsung_dsim *dsi, bool enable)
+{
+ u32 reg;
+
+ reg = samsung_dsim_read(dsi, DSIM_MDRESOL_REG);
+ if (enable)
+ reg |= DSIM_MAIN_STAND_BY;
+ else
+ reg &= ~DSIM_MAIN_STAND_BY;
+ samsung_dsim_write(dsi, DSIM_MDRESOL_REG, reg);
+}
+
+static int samsung_dsim_wait_for_hdr_fifo(struct samsung_dsim *dsi)
+{
+ int timeout = 2000;
+
+ do {
+ u32 reg = samsung_dsim_read(dsi, DSIM_FIFOCTRL_REG);
+
+ if (!(reg & DSIM_SFR_HEADER_FULL))
+ return 0;
+
+ if (!cond_resched())
+ usleep_range(950, 1050);
+ } while (--timeout);
+
+ return -ETIMEDOUT;
+}
+
+static void samsung_dsim_set_cmd_lpm(struct samsung_dsim *dsi, bool lpm)
+{
+ u32 v = samsung_dsim_read(dsi, DSIM_ESCMODE_REG);
+
+ if (lpm)
+ v |= DSIM_CMD_LPDT_LP;
+ else
+ v &= ~DSIM_CMD_LPDT_LP;
+
+ samsung_dsim_write(dsi, DSIM_ESCMODE_REG, v);
+}
+
+static void samsung_dsim_force_bta(struct samsung_dsim *dsi)
+{
+ u32 v = samsung_dsim_read(dsi, DSIM_ESCMODE_REG);
+
+ v |= DSIM_FORCE_BTA;
+ samsung_dsim_write(dsi, DSIM_ESCMODE_REG, v);
+}
+
+static void samsung_dsim_send_to_fifo(struct samsung_dsim *dsi,
+ struct samsung_dsim_transfer *xfer)
+{
+ struct device *dev = dsi->dev;
+ struct mipi_dsi_packet *pkt = &xfer->packet;
+ const u8 *payload = pkt->payload + xfer->tx_done;
+ u16 length = pkt->payload_length - xfer->tx_done;
+ bool first = !xfer->tx_done;
+ u32 reg;
+
+ dev_dbg(dev, "< xfer %pK: tx len %u, done %u, rx len %u, done %u\n",
+ xfer, length, xfer->tx_done, xfer->rx_len, xfer->rx_done);
+
+ if (length > DSI_TX_FIFO_SIZE)
+ length = DSI_TX_FIFO_SIZE;
+
+ xfer->tx_done += length;
+
+ /* Send payload */
+ while (length >= 4) {
+ reg = get_unaligned_le32(payload);
+ samsung_dsim_write(dsi, DSIM_PAYLOAD_REG, reg);
+ payload += 4;
+ length -= 4;
+ }
+
+ reg = 0;
+ switch (length) {
+ case 3:
+ reg |= payload[2] << 16;
+ fallthrough;
+ case 2:
+ reg |= payload[1] << 8;
+ fallthrough;
+ case 1:
+ reg |= payload[0];
+ samsung_dsim_write(dsi, DSIM_PAYLOAD_REG, reg);
+ break;
+ }
+
+ /* Send packet header */
+ if (!first)
+ return;
+
+ reg = get_unaligned_le32(pkt->header);
+ if (samsung_dsim_wait_for_hdr_fifo(dsi)) {
+ dev_err(dev, "waiting for header FIFO timed out\n");
+ return;
+ }
+
+ if (NEQV(xfer->flags & MIPI_DSI_MSG_USE_LPM,
+ dsi->state & DSIM_STATE_CMD_LPM)) {
+ samsung_dsim_set_cmd_lpm(dsi, xfer->flags & MIPI_DSI_MSG_USE_LPM);
+ dsi->state ^= DSIM_STATE_CMD_LPM;
+ }
+
+ samsung_dsim_write(dsi, DSIM_PKTHDR_REG, reg);
+
+ if (xfer->flags & MIPI_DSI_MSG_REQ_ACK)
+ samsung_dsim_force_bta(dsi);
+}
+
+static void samsung_dsim_read_from_fifo(struct samsung_dsim *dsi,
+ struct samsung_dsim_transfer *xfer)
+{
+ u8 *payload = xfer->rx_payload + xfer->rx_done;
+ bool first = !xfer->rx_done;
+ struct device *dev = dsi->dev;
+ u16 length;
+ u32 reg;
+
+ if (first) {
+ reg = samsung_dsim_read(dsi, DSIM_RXFIFO_REG);
+
+ switch (reg & 0x3f) {
+ case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
+ case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
+ if (xfer->rx_len >= 2) {
+ payload[1] = reg >> 16;
+ ++xfer->rx_done;
+ }
+ fallthrough;
+ case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
+ case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
+ payload[0] = reg >> 8;
+ ++xfer->rx_done;
+ xfer->rx_len = xfer->rx_done;
+ xfer->result = 0;
+ goto clear_fifo;
+ case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
+ dev_err(dev, "DSI Error Report: 0x%04x\n", (reg >> 8) & 0xffff);
+ xfer->result = 0;
+ goto clear_fifo;
+ }
+
+ length = (reg >> 8) & 0xffff;
+ if (length > xfer->rx_len) {
+ dev_err(dev,
+ "response too long (%u > %u bytes), stripping\n",
+ xfer->rx_len, length);
+ length = xfer->rx_len;
+ } else if (length < xfer->rx_len) {
+ xfer->rx_len = length;
+ }
+ }
+
+ length = xfer->rx_len - xfer->rx_done;
+ xfer->rx_done += length;
+
+ /* Receive payload */
+ while (length >= 4) {
+ reg = samsung_dsim_read(dsi, DSIM_RXFIFO_REG);
+ payload[0] = (reg >> 0) & 0xff;
+ payload[1] = (reg >> 8) & 0xff;
+ payload[2] = (reg >> 16) & 0xff;
+ payload[3] = (reg >> 24) & 0xff;
+ payload += 4;
+ length -= 4;
+ }
+
+ if (length) {
+ reg = samsung_dsim_read(dsi, DSIM_RXFIFO_REG);
+ switch (length) {
+ case 3:
+ payload[2] = (reg >> 16) & 0xff;
+ fallthrough;
+ case 2:
+ payload[1] = (reg >> 8) & 0xff;
+ fallthrough;
+ case 1:
+ payload[0] = reg & 0xff;
+ }
+ }
+
+ if (xfer->rx_done == xfer->rx_len)
+ xfer->result = 0;
+
+clear_fifo:
+ length = DSI_RX_FIFO_SIZE / 4;
+ do {
+ reg = samsung_dsim_read(dsi, DSIM_RXFIFO_REG);
+ if (reg == DSI_RX_FIFO_EMPTY)
+ break;
+ } while (--length);
+}
+
+static void samsung_dsim_transfer_start(struct samsung_dsim *dsi)
+{
+ unsigned long flags;
+ struct samsung_dsim_transfer *xfer;
+ bool start = false;
+
+again:
+ spin_lock_irqsave(&dsi->transfer_lock, flags);
+
+ if (list_empty(&dsi->transfer_list)) {
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+ return;
+ }
+
+ xfer = list_first_entry(&dsi->transfer_list,
+ struct samsung_dsim_transfer, list);
+
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+
+ if (xfer->packet.payload_length &&
+ xfer->tx_done == xfer->packet.payload_length)
+ /* waiting for RX */
+ return;
+
+ samsung_dsim_send_to_fifo(dsi, xfer);
+
+ if (xfer->packet.payload_length || xfer->rx_len)
+ return;
+
+ xfer->result = 0;
+ complete(&xfer->completed);
+
+ spin_lock_irqsave(&dsi->transfer_lock, flags);
+
+ list_del_init(&xfer->list);
+ start = !list_empty(&dsi->transfer_list);
+
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+
+ if (start)
+ goto again;
+}
+
+static bool samsung_dsim_transfer_finish(struct samsung_dsim *dsi)
+{
+ struct samsung_dsim_transfer *xfer;
+ unsigned long flags;
+ bool start = true;
+
+ spin_lock_irqsave(&dsi->transfer_lock, flags);
+
+ if (list_empty(&dsi->transfer_list)) {
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+ return false;
+ }
+
+ xfer = list_first_entry(&dsi->transfer_list,
+ struct samsung_dsim_transfer, list);
+
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+
+ dev_dbg(dsi->dev,
+ "> xfer %pK, tx_len %zu, tx_done %u, rx_len %u, rx_done %u\n",
+ xfer, xfer->packet.payload_length, xfer->tx_done, xfer->rx_len,
+ xfer->rx_done);
+
+ if (xfer->tx_done != xfer->packet.payload_length)
+ return true;
+
+ if (xfer->rx_done != xfer->rx_len)
+ samsung_dsim_read_from_fifo(dsi, xfer);
+
+ if (xfer->rx_done != xfer->rx_len)
+ return true;
+
+ spin_lock_irqsave(&dsi->transfer_lock, flags);
+
+ list_del_init(&xfer->list);
+ start = !list_empty(&dsi->transfer_list);
+
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+
+ if (!xfer->rx_len)
+ xfer->result = 0;
+ complete(&xfer->completed);
+
+ return start;
+}
+
+static void samsung_dsim_remove_transfer(struct samsung_dsim *dsi,
+ struct samsung_dsim_transfer *xfer)
+{
+ unsigned long flags;
+ bool start;
+
+ spin_lock_irqsave(&dsi->transfer_lock, flags);
+
+ if (!list_empty(&dsi->transfer_list) &&
+ xfer == list_first_entry(&dsi->transfer_list,
+ struct samsung_dsim_transfer, list)) {
+ list_del_init(&xfer->list);
+ start = !list_empty(&dsi->transfer_list);
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+ if (start)
+ samsung_dsim_transfer_start(dsi);
+ return;
+ }
+
+ list_del_init(&xfer->list);
+
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+}
+
+static int samsung_dsim_transfer(struct samsung_dsim *dsi,
+ struct samsung_dsim_transfer *xfer)
+{
+ unsigned long flags;
+ bool stopped;
+
+ xfer->tx_done = 0;
+ xfer->rx_done = 0;
+ xfer->result = -ETIMEDOUT;
+ init_completion(&xfer->completed);
+
+ spin_lock_irqsave(&dsi->transfer_lock, flags);
+
+ stopped = list_empty(&dsi->transfer_list);
+ list_add_tail(&xfer->list, &dsi->transfer_list);
+
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+
+ if (stopped)
+ samsung_dsim_transfer_start(dsi);
+
+ wait_for_completion_timeout(&xfer->completed,
+ msecs_to_jiffies(DSI_XFER_TIMEOUT_MS));
+ if (xfer->result == -ETIMEDOUT) {
+ struct mipi_dsi_packet *pkt = &xfer->packet;
+
+ samsung_dsim_remove_transfer(dsi, xfer);
+ dev_err(dsi->dev, "xfer timed out: %*ph %*ph\n", 4, pkt->header,
+ (int)pkt->payload_length, pkt->payload);
+ return -ETIMEDOUT;
+ }
+
+ /* Also covers hardware timeout condition */
+ return xfer->result;
+}
+
+static irqreturn_t samsung_dsim_irq(int irq, void *dev_id)
+{
+ struct samsung_dsim *dsi = dev_id;
+ u32 status;
+
+ status = samsung_dsim_read(dsi, DSIM_INTSRC_REG);
+ if (!status) {
+ static unsigned long j;
+
+ if (printk_timed_ratelimit(&j, 500))
+ dev_warn(dsi->dev, "spurious interrupt\n");
+ return IRQ_HANDLED;
+ }
+ samsung_dsim_write(dsi, DSIM_INTSRC_REG, status);
+
+ if (status & DSIM_INT_SW_RST_RELEASE) {
+ unsigned long mask = ~(DSIM_INT_RX_DONE |
+ DSIM_INT_SFR_FIFO_EMPTY |
+ DSIM_INT_SFR_HDR_FIFO_EMPTY |
+ DSIM_INT_RX_ECC_ERR |
+ DSIM_INT_SW_RST_RELEASE);
+ samsung_dsim_write(dsi, DSIM_INTMSK_REG, mask);
+ complete(&dsi->completed);
+ return IRQ_HANDLED;
+ }
+
+ if (!(status & (DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY |
+ DSIM_INT_PLL_STABLE)))
+ return IRQ_HANDLED;
+
+ if (samsung_dsim_transfer_finish(dsi))
+ samsung_dsim_transfer_start(dsi);
+
+ return IRQ_HANDLED;
+}
+
+static void samsung_dsim_enable_irq(struct samsung_dsim *dsi)
+{
+ enable_irq(dsi->irq);
+
+ if (dsi->te_gpio)
+ enable_irq(gpiod_to_irq(dsi->te_gpio));
+}
+
+static void samsung_dsim_disable_irq(struct samsung_dsim *dsi)
+{
+ if (dsi->te_gpio)
+ disable_irq(gpiod_to_irq(dsi->te_gpio));
+
+ disable_irq(dsi->irq);
+}
+
+static int samsung_dsim_init(struct samsung_dsim *dsi)
+{
+ const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
+
+ if (dsi->state & DSIM_STATE_INITIALIZED)
+ return 0;
+
+ samsung_dsim_reset(dsi);
+ samsung_dsim_enable_irq(dsi);
+
+ if (driver_data->reg_values[RESET_TYPE] == DSIM_FUNCRST)
+ samsung_dsim_enable_lane(dsi, BIT(dsi->lanes) - 1);
+
+ samsung_dsim_enable_clock(dsi);
+ if (driver_data->wait_for_reset)
+ samsung_dsim_wait_for_reset(dsi);
+ samsung_dsim_set_phy_ctrl(dsi);
+ samsung_dsim_init_link(dsi);
+
+ dsi->state |= DSIM_STATE_INITIALIZED;
+
+ return 0;
+}
+
+static void samsung_dsim_atomic_pre_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct samsung_dsim *dsi = bridge_to_dsi(bridge);
+ int ret;
+
+ if (dsi->state & DSIM_STATE_ENABLED)
+ return;
+
+ ret = pm_runtime_resume_and_get(dsi->dev);
+ if (ret < 0) {
+ dev_err(dsi->dev, "failed to enable DSI device.\n");
+ return;
+ }
+
+ dsi->state |= DSIM_STATE_ENABLED;
+
+ /*
+ * For Exynos-DSIM the downstream bridge, or panel are expecting
+ * the host initialization during DSI transfer.
+ */
+ if (!samsung_dsim_hw_is_exynos(dsi->plat_data->hw_type)) {
+ ret = samsung_dsim_init(dsi);
+ if (ret)
+ return;
+ }
+}
+
+static void samsung_dsim_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct samsung_dsim *dsi = bridge_to_dsi(bridge);
+
+ samsung_dsim_set_display_mode(dsi);
+ samsung_dsim_set_display_enable(dsi, true);
+
+ dsi->state |= DSIM_STATE_VIDOUT_AVAILABLE;
+}
+
+static void samsung_dsim_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct samsung_dsim *dsi = bridge_to_dsi(bridge);
+
+ if (!(dsi->state & DSIM_STATE_ENABLED))
+ return;
+
+ dsi->state &= ~DSIM_STATE_VIDOUT_AVAILABLE;
+}
+
+static void samsung_dsim_atomic_post_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct samsung_dsim *dsi = bridge_to_dsi(bridge);
+
+ samsung_dsim_set_display_enable(dsi, false);
+
+ dsi->state &= ~DSIM_STATE_ENABLED;
+ pm_runtime_put_sync(dsi->dev);
+}
+
+/*
+ * This pixel output formats list referenced from,
+ * AN13573 i.MX 8/RT MIPI DSI/CSI-2, Rev. 0, 21 March 2022
+ * 3.7.4 Pixel formats
+ * Table 14. DSI pixel packing formats
+ */
+static const u32 samsung_dsim_pixel_output_fmts[] = {
+ MEDIA_BUS_FMT_YUYV10_1X20,
+ MEDIA_BUS_FMT_YUYV12_1X24,
+ MEDIA_BUS_FMT_UYVY8_1X16,
+ MEDIA_BUS_FMT_RGB101010_1X30,
+ MEDIA_BUS_FMT_RGB121212_1X36,
+ MEDIA_BUS_FMT_RGB565_1X16,
+ MEDIA_BUS_FMT_RGB666_1X18,
+ MEDIA_BUS_FMT_RGB888_1X24,
+};
+
+static bool samsung_dsim_pixel_output_fmt_supported(u32 fmt)
+{
+ int i;
+
+ if (fmt == MEDIA_BUS_FMT_FIXED)
+ return false;
+
+ for (i = 0; i < ARRAY_SIZE(samsung_dsim_pixel_output_fmts); i++) {
+ if (samsung_dsim_pixel_output_fmts[i] == fmt)
+ return true;
+ }
+
+ return false;
+}
+
+static u32 *
+samsung_dsim_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ if (!samsung_dsim_pixel_output_fmt_supported(output_fmt))
+ /*
+ * Some bridge/display drivers are still not able to pass the
+ * correct format, so handle those pipelines by falling back
+ * to the default format till the supported formats finalized.
+ */
+ output_fmt = MEDIA_BUS_FMT_RGB888_1X24;
+
+ input_fmts[0] = output_fmt;
+ *num_input_fmts = 1;
+
+ return input_fmts;
+}
+
+static int samsung_dsim_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct samsung_dsim *dsi = bridge_to_dsi(bridge);
+ struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
+
+ /*
+ * The i.MX8M Mini/Nano glue logic between LCDIF and DSIM
+ * inverts HS/VS/DE sync signals polarity, therefore, while
+ * i.MX 8M Mini Applications Processor Reference Manual Rev. 3, 11/2020
+ * 13.6.3.5.2 RGB interface
+ * i.MX 8M Nano Applications Processor Reference Manual Rev. 2, 07/2022
+ * 13.6.2.7.2 RGB interface
+ * both claim "Vsync, Hsync, and VDEN are active high signals.", the
+ * LCDIF must generate inverted HS/VS/DE signals, i.e. active LOW.
+ */
+ if (dsi->plat_data->hw_type == DSIM_TYPE_IMX8MM) {
+ adjusted_mode->flags |= (DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC);
+ adjusted_mode->flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
+ }
+
+ return 0;
+}
+
+static void samsung_dsim_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct samsung_dsim *dsi = bridge_to_dsi(bridge);
+
+ drm_mode_copy(&dsi->mode, adjusted_mode);
+}
+
+static int samsung_dsim_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct samsung_dsim *dsi = bridge_to_dsi(bridge);
+
+ return drm_bridge_attach(bridge->encoder, dsi->out_bridge, bridge,
+ flags);
+}
+
+static const struct drm_bridge_funcs samsung_dsim_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_get_input_bus_fmts = samsung_dsim_atomic_get_input_bus_fmts,
+ .atomic_check = samsung_dsim_atomic_check,
+ .atomic_pre_enable = samsung_dsim_atomic_pre_enable,
+ .atomic_enable = samsung_dsim_atomic_enable,
+ .atomic_disable = samsung_dsim_atomic_disable,
+ .atomic_post_disable = samsung_dsim_atomic_post_disable,
+ .mode_set = samsung_dsim_mode_set,
+ .attach = samsung_dsim_attach,
+};
+
+static irqreturn_t samsung_dsim_te_irq_handler(int irq, void *dev_id)
+{
+ struct samsung_dsim *dsi = (struct samsung_dsim *)dev_id;
+ const struct samsung_dsim_plat_data *pdata = dsi->plat_data;
+
+ if (pdata->host_ops && pdata->host_ops->te_irq_handler)
+ return pdata->host_ops->te_irq_handler(dsi);
+
+ return IRQ_HANDLED;
+}
+
+static int samsung_dsim_register_te_irq(struct samsung_dsim *dsi, struct device *dev)
+{
+ int te_gpio_irq;
+ int ret;
+
+ dsi->te_gpio = devm_gpiod_get_optional(dev, "te", GPIOD_IN);
+ if (IS_ERR(dsi->te_gpio))
+ return dev_err_probe(dev, PTR_ERR(dsi->te_gpio), "failed to get te GPIO\n");
+
+ te_gpio_irq = gpiod_to_irq(dsi->te_gpio);
+
+ ret = request_threaded_irq(te_gpio_irq, samsung_dsim_te_irq_handler, NULL,
+ IRQF_TRIGGER_RISING | IRQF_NO_AUTOEN, "TE", dsi);
+ if (ret) {
+ dev_err(dsi->dev, "request interrupt failed with %d\n", ret);
+ gpiod_put(dsi->te_gpio);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int samsung_dsim_host_attach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *device)
+{
+ struct samsung_dsim *dsi = host_to_dsi(host);
+ const struct samsung_dsim_plat_data *pdata = dsi->plat_data;
+ struct device *dev = dsi->dev;
+ int ret;
+
+ dsi->out_bridge = devm_drm_of_dsi_get_bridge(dev, dev->of_node, 1, 0);
+ if (IS_ERR(dsi->out_bridge)) {
+ ret = PTR_ERR(dsi->out_bridge);
+ DRM_DEV_ERROR(dev, "failed to find the bridge: %d\n", ret);
+ return ret;
+ }
+
+ DRM_DEV_INFO(dev, "Attached %s device\n", device->name);
+
+ drm_bridge_add(&dsi->bridge);
+
+ if (pdata->host_ops && pdata->host_ops->attach)
+ pdata->host_ops->attach(dsi, device);
+
+ /*
+ * This is a temporary solution and should be made by more generic way.
+ *
+ * If attached panel device is for command mode one, dsi should register
+ * TE interrupt handler.
+ */
+ if (!(device->mode_flags & MIPI_DSI_MODE_VIDEO)) {
+ ret = samsung_dsim_register_te_irq(dsi, &device->dev);
+ if (ret)
+ return ret;
+ }
+
+ dsi->lanes = device->lanes;
+ dsi->format = device->format;
+ dsi->mode_flags = device->mode_flags;
+
+ return 0;
+}
+
+static void samsung_dsim_unregister_te_irq(struct samsung_dsim *dsi)
+{
+ if (dsi->te_gpio) {
+ free_irq(gpiod_to_irq(dsi->te_gpio), dsi);
+ gpiod_put(dsi->te_gpio);
+ }
+}
+
+static int samsung_dsim_host_detach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *device)
+{
+ struct samsung_dsim *dsi = host_to_dsi(host);
+ const struct samsung_dsim_plat_data *pdata = dsi->plat_data;
+
+ if (dsi->out_bridge->funcs->detach)
+ dsi->out_bridge->funcs->detach(dsi->out_bridge);
+
+ dsi->out_bridge = NULL;
+
+ if (pdata->host_ops && pdata->host_ops->detach)
+ pdata->host_ops->detach(dsi, device);
+
+ samsung_dsim_unregister_te_irq(dsi);
+
+ drm_bridge_remove(&dsi->bridge);
+
+ return 0;
+}
+
+static ssize_t samsung_dsim_host_transfer(struct mipi_dsi_host *host,
+ const struct mipi_dsi_msg *msg)
+{
+ struct samsung_dsim *dsi = host_to_dsi(host);
+ struct samsung_dsim_transfer xfer;
+ int ret;
+
+ if (!(dsi->state & DSIM_STATE_ENABLED))
+ return -EINVAL;
+
+ ret = samsung_dsim_init(dsi);
+ if (ret)
+ return ret;
+
+ ret = mipi_dsi_create_packet(&xfer.packet, msg);
+ if (ret < 0)
+ return ret;
+
+ xfer.rx_len = msg->rx_len;
+ xfer.rx_payload = msg->rx_buf;
+ xfer.flags = msg->flags;
+
+ ret = samsung_dsim_transfer(dsi, &xfer);
+ return (ret < 0) ? ret : xfer.rx_done;
+}
+
+static const struct mipi_dsi_host_ops samsung_dsim_ops = {
+ .attach = samsung_dsim_host_attach,
+ .detach = samsung_dsim_host_detach,
+ .transfer = samsung_dsim_host_transfer,
+};
+
+static int samsung_dsim_of_read_u32(const struct device_node *np,
+ const char *propname, u32 *out_value)
+{
+ int ret = of_property_read_u32(np, propname, out_value);
+
+ if (ret < 0)
+ pr_err("%pOF: failed to get '%s' property\n", np, propname);
+
+ return ret;
+}
+
+static int samsung_dsim_parse_dt(struct samsung_dsim *dsi)
+{
+ struct device *dev = dsi->dev;
+ struct device_node *node = dev->of_node;
+ int ret;
+
+ ret = samsung_dsim_of_read_u32(node, "samsung,pll-clock-frequency",
+ &dsi->pll_clk_rate);
+ if (ret < 0)
+ return ret;
+
+ ret = samsung_dsim_of_read_u32(node, "samsung,burst-clock-frequency",
+ &dsi->burst_clk_rate);
+ if (ret < 0)
+ return ret;
+
+ ret = samsung_dsim_of_read_u32(node, "samsung,esc-clock-frequency",
+ &dsi->esc_clk_rate);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int generic_dsim_register_host(struct samsung_dsim *dsi)
+{
+ return mipi_dsi_host_register(&dsi->dsi_host);
+}
+
+static void generic_dsim_unregister_host(struct samsung_dsim *dsi)
+{
+ mipi_dsi_host_unregister(&dsi->dsi_host);
+}
+
+static const struct samsung_dsim_host_ops generic_dsim_host_ops = {
+ .register_host = generic_dsim_register_host,
+ .unregister_host = generic_dsim_unregister_host,
+};
+
+static const struct drm_bridge_timings samsung_dsim_bridge_timings_de_low = {
+ .input_bus_flags = DRM_BUS_FLAG_DE_LOW,
+};
+
+int samsung_dsim_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct samsung_dsim *dsi;
+ int ret, i;
+
+ dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
+ if (!dsi)
+ return -ENOMEM;
+
+ init_completion(&dsi->completed);
+ spin_lock_init(&dsi->transfer_lock);
+ INIT_LIST_HEAD(&dsi->transfer_list);
+
+ dsi->dsi_host.ops = &samsung_dsim_ops;
+ dsi->dsi_host.dev = dev;
+
+ dsi->dev = dev;
+ dsi->plat_data = of_device_get_match_data(dev);
+ dsi->driver_data = samsung_dsim_types[dsi->plat_data->hw_type];
+
+ dsi->supplies[0].supply = "vddcore";
+ dsi->supplies[1].supply = "vddio";
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(dsi->supplies),
+ dsi->supplies);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to get regulators\n");
+
+ dsi->clks = devm_kcalloc(dev, dsi->driver_data->num_clks,
+ sizeof(*dsi->clks), GFP_KERNEL);
+ if (!dsi->clks)
+ return -ENOMEM;
+
+ for (i = 0; i < dsi->driver_data->num_clks; i++) {
+ dsi->clks[i] = devm_clk_get(dev, clk_names[i]);
+ if (IS_ERR(dsi->clks[i])) {
+ if (strcmp(clk_names[i], "sclk_mipi") == 0) {
+ dsi->clks[i] = devm_clk_get(dev, OLD_SCLK_MIPI_CLK_NAME);
+ if (!IS_ERR(dsi->clks[i]))
+ continue;
+ }
+
+ dev_info(dev, "failed to get the clock: %s\n", clk_names[i]);
+ return PTR_ERR(dsi->clks[i]);
+ }
+ }
+
+ dsi->reg_base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(dsi->reg_base))
+ return PTR_ERR(dsi->reg_base);
+
+ dsi->phy = devm_phy_optional_get(dev, "dsim");
+ if (IS_ERR(dsi->phy)) {
+ dev_info(dev, "failed to get dsim phy\n");
+ return PTR_ERR(dsi->phy);
+ }
+
+ dsi->irq = platform_get_irq(pdev, 0);
+ if (dsi->irq < 0)
+ return dsi->irq;
+
+ ret = devm_request_threaded_irq(dev, dsi->irq, NULL,
+ samsung_dsim_irq,
+ IRQF_ONESHOT | IRQF_NO_AUTOEN,
+ dev_name(dev), dsi);
+ if (ret) {
+ dev_err(dev, "failed to request dsi irq\n");
+ return ret;
+ }
+
+ ret = samsung_dsim_parse_dt(dsi);
+ if (ret)
+ return ret;
+
+ platform_set_drvdata(pdev, dsi);
+
+ pm_runtime_enable(dev);
+
+ dsi->bridge.funcs = &samsung_dsim_bridge_funcs;
+ dsi->bridge.of_node = dev->of_node;
+ dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
+
+ /* DE_LOW: i.MX8M Mini/Nano LCDIF-DSIM glue logic inverts HS/VS/DE */
+ if (dsi->plat_data->hw_type == DSIM_TYPE_IMX8MM)
+ dsi->bridge.timings = &samsung_dsim_bridge_timings_de_low;
+
+ if (dsi->plat_data->host_ops && dsi->plat_data->host_ops->register_host)
+ ret = dsi->plat_data->host_ops->register_host(dsi);
+
+ if (ret)
+ goto err_disable_runtime;
+
+ return 0;
+
+err_disable_runtime:
+ pm_runtime_disable(dev);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(samsung_dsim_probe);
+
+int samsung_dsim_remove(struct platform_device *pdev)
+{
+ struct samsung_dsim *dsi = platform_get_drvdata(pdev);
+
+ pm_runtime_disable(&pdev->dev);
+
+ if (dsi->plat_data->host_ops && dsi->plat_data->host_ops->unregister_host)
+ dsi->plat_data->host_ops->unregister_host(dsi);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(samsung_dsim_remove);
+
+static int __maybe_unused samsung_dsim_suspend(struct device *dev)
+{
+ struct samsung_dsim *dsi = dev_get_drvdata(dev);
+ const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
+ int ret, i;
+
+ usleep_range(10000, 20000);
+
+ if (dsi->state & DSIM_STATE_INITIALIZED) {
+ dsi->state &= ~DSIM_STATE_INITIALIZED;
+
+ samsung_dsim_disable_clock(dsi);
+
+ samsung_dsim_disable_irq(dsi);
+ }
+
+ dsi->state &= ~DSIM_STATE_CMD_LPM;
+
+ phy_power_off(dsi->phy);
+
+ for (i = driver_data->num_clks - 1; i > -1; i--)
+ clk_disable_unprepare(dsi->clks[i]);
+
+ ret = regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
+ if (ret < 0)
+ dev_err(dsi->dev, "cannot disable regulators %d\n", ret);
+
+ return 0;
+}
+
+static int __maybe_unused samsung_dsim_resume(struct device *dev)
+{
+ struct samsung_dsim *dsi = dev_get_drvdata(dev);
+ const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
+ int ret, i;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
+ if (ret < 0) {
+ dev_err(dsi->dev, "cannot enable regulators %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < driver_data->num_clks; i++) {
+ ret = clk_prepare_enable(dsi->clks[i]);
+ if (ret < 0)
+ goto err_clk;
+ }
+
+ ret = phy_power_on(dsi->phy);
+ if (ret < 0) {
+ dev_err(dsi->dev, "cannot enable phy %d\n", ret);
+ goto err_clk;
+ }
+
+ return 0;
+
+err_clk:
+ while (--i > -1)
+ clk_disable_unprepare(dsi->clks[i]);
+ regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
+
+ return ret;
+}
+
+const struct dev_pm_ops samsung_dsim_pm_ops = {
+ SET_RUNTIME_PM_OPS(samsung_dsim_suspend, samsung_dsim_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+};
+EXPORT_SYMBOL_GPL(samsung_dsim_pm_ops);
+
+static const struct of_device_id samsung_dsim_of_match[] = {
+ { /* sentinel. */ }
+};
+MODULE_DEVICE_TABLE(of, samsung_dsim_of_match);
+
+static struct platform_driver samsung_dsim_driver = {
+ .probe = samsung_dsim_probe,
+ .remove = samsung_dsim_remove,
+ .driver = {
+ .name = "samsung-dsim",
+ .owner = THIS_MODULE,
+ .pm = &samsung_dsim_pm_ops,
+ .of_match_table = samsung_dsim_of_match,
+ },
+};
+
+module_platform_driver(samsung_dsim_driver);
+
+MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>");
+MODULE_DESCRIPTION("Samsung MIPI DSIM controller bridge");
+MODULE_LICENSE("GPL");
@@ -59,6 +59,7 @@ config DRM_EXYNOS_DSI
depends on DRM_EXYNOS_FIMD || DRM_EXYNOS5433_DECON || DRM_EXYNOS7_DECON
select DRM_MIPI_DSI
select DRM_PANEL
+ select DRM_SAMSUNG_DSIM
default n
help
This enables support for Exynos MIPI-DSI device.
@@ -1,1725 +1,30 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * Samsung SoC MIPI DSI Master driver.
+ * Samsung MIPI DSIM glue for Exynos SoCs.
*
* Copyright (c) 2014 Samsung Electronics Co., Ltd
*
* Contacts: Tomasz Figa <t.figa@samsung.com>
-*/
+ */
-#include <linux/clk.h>
-#include <linux/delay.h>
#include <linux/component.h>
-#include <linux/gpio/consumer.h>
-#include <linux/irq.h>
-#include <linux/media-bus-format.h>
#include <linux/of_device.h>
-#include <linux/of_graph.h>
-#include <linux/phy/phy.h>
-#include <linux/regulator/consumer.h>
-
-#include <asm/unaligned.h>
-#include <video/mipi_display.h>
-#include <video/videomode.h>
-
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_bridge.h>
-#include <drm/drm_mipi_dsi.h>
-#include <drm/drm_panel.h>
-#include <drm/drm_print.h>
+#include <drm/bridge/samsung-dsim.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
#include "exynos_drm_crtc.h"
#include "exynos_drm_drv.h"
-/* returns true iff both arguments logically differs */
-#define NEQV(a, b) (!(a) ^ !(b))
-
-/* DSIM_STATUS */
-#define DSIM_STOP_STATE_DAT(x) (((x) & 0xf) << 0)
-#define DSIM_STOP_STATE_CLK (1 << 8)
-#define DSIM_TX_READY_HS_CLK (1 << 10)
-#define DSIM_PLL_STABLE (1 << 31)
-
-/* DSIM_SWRST */
-#define DSIM_FUNCRST (1 << 16)
-#define DSIM_SWRST (1 << 0)
-
-/* DSIM_TIMEOUT */
-#define DSIM_LPDR_TIMEOUT(x) ((x) << 0)
-#define DSIM_BTA_TIMEOUT(x) ((x) << 16)
-
-/* DSIM_CLKCTRL */
-#define DSIM_ESC_PRESCALER(x) (((x) & 0xffff) << 0)
-#define DSIM_ESC_PRESCALER_MASK (0xffff << 0)
-#define DSIM_LANE_ESC_CLK_EN_CLK (1 << 19)
-#define DSIM_LANE_ESC_CLK_EN_DATA(x) (((x) & 0xf) << 20)
-#define DSIM_LANE_ESC_CLK_EN_DATA_MASK (0xf << 20)
-#define DSIM_BYTE_CLKEN (1 << 24)
-#define DSIM_BYTE_CLK_SRC(x) (((x) & 0x3) << 25)
-#define DSIM_BYTE_CLK_SRC_MASK (0x3 << 25)
-#define DSIM_PLL_BYPASS (1 << 27)
-#define DSIM_ESC_CLKEN (1 << 28)
-#define DSIM_TX_REQUEST_HSCLK (1 << 31)
-
-/* DSIM_CONFIG */
-#define DSIM_LANE_EN_CLK (1 << 0)
-#define DSIM_LANE_EN(x) (((x) & 0xf) << 1)
-#define DSIM_NUM_OF_DATA_LANE(x) (((x) & 0x3) << 5)
-#define DSIM_SUB_PIX_FORMAT(x) (((x) & 0x7) << 8)
-#define DSIM_MAIN_PIX_FORMAT_MASK (0x7 << 12)
-#define DSIM_MAIN_PIX_FORMAT_RGB888 (0x7 << 12)
-#define DSIM_MAIN_PIX_FORMAT_RGB666 (0x6 << 12)
-#define DSIM_MAIN_PIX_FORMAT_RGB666_P (0x5 << 12)
-#define DSIM_MAIN_PIX_FORMAT_RGB565 (0x4 << 12)
-#define DSIM_SUB_VC (((x) & 0x3) << 16)
-#define DSIM_MAIN_VC (((x) & 0x3) << 18)
-#define DSIM_HSA_DISABLE_MODE (1 << 20)
-#define DSIM_HBP_DISABLE_MODE (1 << 21)
-#define DSIM_HFP_DISABLE_MODE (1 << 22)
-/*
- * The i.MX 8M Mini Applications Processor Reference Manual,
- * Rev. 3, 11/2020 Page 4091
- * The i.MX 8M Nano Applications Processor Reference Manual,
- * Rev. 2, 07/2022 Page 3058
- * The i.MX 8M Plus Applications Processor Reference Manual,
- * Rev. 1, 06/2021 Page 5436
- * named this bit as 'HseDisableMode' but the bit definition
- * is quite opposite like
- * 0 = Disables transfer
- * 1 = Enables transfer
- * which clearly states that HSE is not a disable bit.
- *
- * This bit is named as per the manual even though it is not
- * a disable bit however the driver logic for handling HSE
- * is based on the MIPI_DSI_MODE_VIDEO_HSE flag itself.
- */
-#define DSIM_HSE_DISABLE_MODE (1 << 23)
-#define DSIM_AUTO_MODE (1 << 24)
-#define DSIM_VIDEO_MODE (1 << 25)
-#define DSIM_BURST_MODE (1 << 26)
-#define DSIM_SYNC_INFORM (1 << 27)
-#define DSIM_EOT_DISABLE (1 << 28)
-#define DSIM_MFLUSH_VS (1 << 29)
-/* This flag is valid only for exynos3250/3472/5260/5430 */
-#define DSIM_CLKLANE_STOP (1 << 30)
-
-/* DSIM_ESCMODE */
-#define DSIM_TX_TRIGGER_RST (1 << 4)
-#define DSIM_TX_LPDT_LP (1 << 6)
-#define DSIM_CMD_LPDT_LP (1 << 7)
-#define DSIM_FORCE_BTA (1 << 16)
-#define DSIM_FORCE_STOP_STATE (1 << 20)
-#define DSIM_STOP_STATE_CNT(x) (((x) & 0x7ff) << 21)
-#define DSIM_STOP_STATE_CNT_MASK (0x7ff << 21)
-
-/* DSIM_MDRESOL */
-#define DSIM_MAIN_STAND_BY (1 << 31)
-#define DSIM_MAIN_VRESOL(x, num_bits) (((x) & ((1 << (num_bits)) - 1)) << 16)
-#define DSIM_MAIN_HRESOL(x, num_bits) (((x) & ((1 << (num_bits)) - 1)) << 0)
-
-/* DSIM_MVPORCH */
-#define DSIM_CMD_ALLOW(x) ((x) << 28)
-#define DSIM_STABLE_VFP(x) ((x) << 16)
-#define DSIM_MAIN_VBP(x) ((x) << 0)
-#define DSIM_CMD_ALLOW_MASK (0xf << 28)
-#define DSIM_STABLE_VFP_MASK (0x7ff << 16)
-#define DSIM_MAIN_VBP_MASK (0x7ff << 0)
-
-/* DSIM_MHPORCH */
-#define DSIM_MAIN_HFP(x) ((x) << 16)
-#define DSIM_MAIN_HBP(x) ((x) << 0)
-#define DSIM_MAIN_HFP_MASK ((0xffff) << 16)
-#define DSIM_MAIN_HBP_MASK ((0xffff) << 0)
-
-/* DSIM_MSYNC */
-#define DSIM_MAIN_VSA(x) ((x) << 22)
-#define DSIM_MAIN_HSA(x) ((x) << 0)
-#define DSIM_MAIN_VSA_MASK ((0x3ff) << 22)
-#define DSIM_MAIN_HSA_MASK ((0xffff) << 0)
-
-/* DSIM_SDRESOL */
-#define DSIM_SUB_STANDY(x) ((x) << 31)
-#define DSIM_SUB_VRESOL(x) ((x) << 16)
-#define DSIM_SUB_HRESOL(x) ((x) << 0)
-#define DSIM_SUB_STANDY_MASK ((0x1) << 31)
-#define DSIM_SUB_VRESOL_MASK ((0x7ff) << 16)
-#define DSIM_SUB_HRESOL_MASK ((0x7ff) << 0)
-
-/* DSIM_INTSRC */
-#define DSIM_INT_PLL_STABLE (1 << 31)
-#define DSIM_INT_SW_RST_RELEASE (1 << 30)
-#define DSIM_INT_SFR_FIFO_EMPTY (1 << 29)
-#define DSIM_INT_SFR_HDR_FIFO_EMPTY (1 << 28)
-#define DSIM_INT_BTA (1 << 25)
-#define DSIM_INT_FRAME_DONE (1 << 24)
-#define DSIM_INT_RX_TIMEOUT (1 << 21)
-#define DSIM_INT_BTA_TIMEOUT (1 << 20)
-#define DSIM_INT_RX_DONE (1 << 18)
-#define DSIM_INT_RX_TE (1 << 17)
-#define DSIM_INT_RX_ACK (1 << 16)
-#define DSIM_INT_RX_ECC_ERR (1 << 15)
-#define DSIM_INT_RX_CRC_ERR (1 << 14)
-
-/* DSIM_FIFOCTRL */
-#define DSIM_RX_DATA_FULL (1 << 25)
-#define DSIM_RX_DATA_EMPTY (1 << 24)
-#define DSIM_SFR_HEADER_FULL (1 << 23)
-#define DSIM_SFR_HEADER_EMPTY (1 << 22)
-#define DSIM_SFR_PAYLOAD_FULL (1 << 21)
-#define DSIM_SFR_PAYLOAD_EMPTY (1 << 20)
-#define DSIM_I80_HEADER_FULL (1 << 19)
-#define DSIM_I80_HEADER_EMPTY (1 << 18)
-#define DSIM_I80_PAYLOAD_FULL (1 << 17)
-#define DSIM_I80_PAYLOAD_EMPTY (1 << 16)
-#define DSIM_SD_HEADER_FULL (1 << 15)
-#define DSIM_SD_HEADER_EMPTY (1 << 14)
-#define DSIM_SD_PAYLOAD_FULL (1 << 13)
-#define DSIM_SD_PAYLOAD_EMPTY (1 << 12)
-#define DSIM_MD_HEADER_FULL (1 << 11)
-#define DSIM_MD_HEADER_EMPTY (1 << 10)
-#define DSIM_MD_PAYLOAD_FULL (1 << 9)
-#define DSIM_MD_PAYLOAD_EMPTY (1 << 8)
-#define DSIM_RX_FIFO (1 << 4)
-#define DSIM_SFR_FIFO (1 << 3)
-#define DSIM_I80_FIFO (1 << 2)
-#define DSIM_SD_FIFO (1 << 1)
-#define DSIM_MD_FIFO (1 << 0)
-
-/* DSIM_PHYACCHR */
-#define DSIM_AFC_EN (1 << 14)
-#define DSIM_AFC_CTL(x) (((x) & 0x7) << 5)
-
-/* DSIM_PLLCTRL */
-#define DSIM_FREQ_BAND(x) ((x) << 24)
-#define DSIM_PLL_EN (1 << 23)
-#define DSIM_PLL_P(x, offset) ((x) << (offset))
-#define DSIM_PLL_M(x) ((x) << 4)
-#define DSIM_PLL_S(x) ((x) << 1)
-
-/* DSIM_PHYCTRL */
-#define DSIM_PHYCTRL_ULPS_EXIT(x) (((x) & 0x1ff) << 0)
-#define DSIM_PHYCTRL_B_DPHYCTL_VREG_LP (1 << 30)
-#define DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP (1 << 14)
-
-/* DSIM_PHYTIMING */
-#define DSIM_PHYTIMING_LPX(x) ((x) << 8)
-#define DSIM_PHYTIMING_HS_EXIT(x) ((x) << 0)
-
-/* DSIM_PHYTIMING1 */
-#define DSIM_PHYTIMING1_CLK_PREPARE(x) ((x) << 24)
-#define DSIM_PHYTIMING1_CLK_ZERO(x) ((x) << 16)
-#define DSIM_PHYTIMING1_CLK_POST(x) ((x) << 8)
-#define DSIM_PHYTIMING1_CLK_TRAIL(x) ((x) << 0)
-
-/* DSIM_PHYTIMING2 */
-#define DSIM_PHYTIMING2_HS_PREPARE(x) ((x) << 16)
-#define DSIM_PHYTIMING2_HS_ZERO(x) ((x) << 8)
-#define DSIM_PHYTIMING2_HS_TRAIL(x) ((x) << 0)
-
-#define DSI_MAX_BUS_WIDTH 4
-#define DSI_NUM_VIRTUAL_CHANNELS 4
-#define DSI_TX_FIFO_SIZE 2048
-#define DSI_RX_FIFO_SIZE 256
-#define DSI_XFER_TIMEOUT_MS 100
-#define DSI_RX_FIFO_EMPTY 0x30800002
-
-#define OLD_SCLK_MIPI_CLK_NAME "pll_clk"
-
-static const char *const clk_names[5] = { "bus_clk", "sclk_mipi",
- "phyclk_mipidphy0_bitclkdiv8", "phyclk_mipidphy0_rxclkesc0",
- "sclk_rgb_vclk_to_dsim0" };
-
-enum exynos_dsi_transfer_type {
- EXYNOS_DSI_TX,
- EXYNOS_DSI_RX,
-};
-
-struct exynos_dsi_transfer {
- struct list_head list;
- struct completion completed;
- int result;
- struct mipi_dsi_packet packet;
- u16 flags;
- u16 tx_done;
-
- u8 *rx_payload;
- u16 rx_len;
- u16 rx_done;
-};
-
-#define DSIM_STATE_ENABLED BIT(0)
-#define DSIM_STATE_INITIALIZED BIT(1)
-#define DSIM_STATE_CMD_LPM BIT(2)
-#define DSIM_STATE_VIDOUT_AVAILABLE BIT(3)
-
-#define exynos_dsi_hw_is_exynos(hw) \
- ((hw) >= DSIM_TYPE_EXYNOS3250 && (hw) <= DSIM_TYPE_EXYNOS5433)
-
-enum exynos_dsi_type {
- DSIM_TYPE_EXYNOS3250,
- DSIM_TYPE_EXYNOS4210,
- DSIM_TYPE_EXYNOS5410,
- DSIM_TYPE_EXYNOS5422,
- DSIM_TYPE_EXYNOS5433,
- DSIM_TYPE_IMX8MM,
- DSIM_TYPE_COUNT,
-};
-
-struct exynos_dsi_driver_data {
- const unsigned int *reg_ofs;
- unsigned int plltmr_reg;
- unsigned int has_freqband:1;
- unsigned int has_clklane_stop:1;
- unsigned int num_clks;
- unsigned int max_freq;
- unsigned int wait_for_reset;
- unsigned int num_bits_resol;
- unsigned int pll_p_offset;
- const unsigned int *reg_values;
-};
-
-struct exynos_dsi_plat_data {
- enum exynos_dsi_type hw_type;
- const struct exynos_dsim_host_ops *host_ops;
-};
-
struct exynos_dsi {
- struct mipi_dsi_host dsi_host;
- struct drm_bridge bridge;
- struct drm_bridge *out_bridge;
- struct device *dev;
- struct drm_display_mode mode;
-
- void __iomem *reg_base;
- struct phy *phy;
- struct clk **clks;
- struct regulator_bulk_data supplies[2];
- int irq;
- struct gpio_desc *te_gpio;
-
- u32 pll_clk_rate;
- u32 burst_clk_rate;
- u32 esc_clk_rate;
- u32 lanes;
- u32 mode_flags;
- u32 format;
-
- int state;
- struct drm_property *brightness;
- struct completion completed;
-
- spinlock_t transfer_lock; /* protects transfer_list */
- struct list_head transfer_list;
-
- const struct exynos_dsi_driver_data *driver_data;
- const struct exynos_dsi_plat_data *plat_data;
-
- void *priv;
-};
-
-struct exynos_dsim_host_ops {
- int (*register_host)(struct exynos_dsi *dsim);
- void (*unregister_host)(struct exynos_dsi *dsim);
- int (*attach)(struct exynos_dsi *dsim, struct mipi_dsi_device *device);
- int (*detach)(struct exynos_dsi *dsim, struct mipi_dsi_device *device);
- irqreturn_t (*te_irq_handler)(struct exynos_dsi *dsim);
-};
-
-struct exynos_dsi_enc {
struct drm_encoder encoder;
};
-#define host_to_dsi(host) container_of(host, struct exynos_dsi, dsi_host)
-
-static inline struct exynos_dsi *bridge_to_dsi(struct drm_bridge *b)
-{
- return container_of(b, struct exynos_dsi, bridge);
-}
-
-enum reg_idx {
- DSIM_STATUS_REG, /* Status register */
- DSIM_SWRST_REG, /* Software reset register */
- DSIM_CLKCTRL_REG, /* Clock control register */
- DSIM_TIMEOUT_REG, /* Time out register */
- DSIM_CONFIG_REG, /* Configuration register */
- DSIM_ESCMODE_REG, /* Escape mode register */
- DSIM_MDRESOL_REG,
- DSIM_MVPORCH_REG, /* Main display Vporch register */
- DSIM_MHPORCH_REG, /* Main display Hporch register */
- DSIM_MSYNC_REG, /* Main display sync area register */
- DSIM_INTSRC_REG, /* Interrupt source register */
- DSIM_INTMSK_REG, /* Interrupt mask register */
- DSIM_PKTHDR_REG, /* Packet Header FIFO register */
- DSIM_PAYLOAD_REG, /* Payload FIFO register */
- DSIM_RXFIFO_REG, /* Read FIFO register */
- DSIM_FIFOCTRL_REG, /* FIFO status and control register */
- DSIM_PLLCTRL_REG, /* PLL control register */
- DSIM_PHYCTRL_REG,
- DSIM_PHYTIMING_REG,
- DSIM_PHYTIMING1_REG,
- DSIM_PHYTIMING2_REG,
- NUM_REGS
-};
-
-static inline void exynos_dsi_write(struct exynos_dsi *dsi, enum reg_idx idx,
- u32 val)
-{
-
- writel(val, dsi->reg_base + dsi->driver_data->reg_ofs[idx]);
-}
-
-static inline u32 exynos_dsi_read(struct exynos_dsi *dsi, enum reg_idx idx)
-{
- return readl(dsi->reg_base + dsi->driver_data->reg_ofs[idx]);
-}
-
-static const unsigned int exynos_reg_ofs[] = {
- [DSIM_STATUS_REG] = 0x00,
- [DSIM_SWRST_REG] = 0x04,
- [DSIM_CLKCTRL_REG] = 0x08,
- [DSIM_TIMEOUT_REG] = 0x0c,
- [DSIM_CONFIG_REG] = 0x10,
- [DSIM_ESCMODE_REG] = 0x14,
- [DSIM_MDRESOL_REG] = 0x18,
- [DSIM_MVPORCH_REG] = 0x1c,
- [DSIM_MHPORCH_REG] = 0x20,
- [DSIM_MSYNC_REG] = 0x24,
- [DSIM_INTSRC_REG] = 0x2c,
- [DSIM_INTMSK_REG] = 0x30,
- [DSIM_PKTHDR_REG] = 0x34,
- [DSIM_PAYLOAD_REG] = 0x38,
- [DSIM_RXFIFO_REG] = 0x3c,
- [DSIM_FIFOCTRL_REG] = 0x44,
- [DSIM_PLLCTRL_REG] = 0x4c,
- [DSIM_PHYCTRL_REG] = 0x5c,
- [DSIM_PHYTIMING_REG] = 0x64,
- [DSIM_PHYTIMING1_REG] = 0x68,
- [DSIM_PHYTIMING2_REG] = 0x6c,
-};
-
-static const unsigned int exynos5433_reg_ofs[] = {
- [DSIM_STATUS_REG] = 0x04,
- [DSIM_SWRST_REG] = 0x0C,
- [DSIM_CLKCTRL_REG] = 0x10,
- [DSIM_TIMEOUT_REG] = 0x14,
- [DSIM_CONFIG_REG] = 0x18,
- [DSIM_ESCMODE_REG] = 0x1C,
- [DSIM_MDRESOL_REG] = 0x20,
- [DSIM_MVPORCH_REG] = 0x24,
- [DSIM_MHPORCH_REG] = 0x28,
- [DSIM_MSYNC_REG] = 0x2C,
- [DSIM_INTSRC_REG] = 0x34,
- [DSIM_INTMSK_REG] = 0x38,
- [DSIM_PKTHDR_REG] = 0x3C,
- [DSIM_PAYLOAD_REG] = 0x40,
- [DSIM_RXFIFO_REG] = 0x44,
- [DSIM_FIFOCTRL_REG] = 0x4C,
- [DSIM_PLLCTRL_REG] = 0x94,
- [DSIM_PHYCTRL_REG] = 0xA4,
- [DSIM_PHYTIMING_REG] = 0xB4,
- [DSIM_PHYTIMING1_REG] = 0xB8,
- [DSIM_PHYTIMING2_REG] = 0xBC,
-};
-
-enum reg_value_idx {
- RESET_TYPE,
- PLL_TIMER,
- STOP_STATE_CNT,
- PHYCTRL_ULPS_EXIT,
- PHYCTRL_VREG_LP,
- PHYCTRL_SLEW_UP,
- PHYTIMING_LPX,
- PHYTIMING_HS_EXIT,
- PHYTIMING_CLK_PREPARE,
- PHYTIMING_CLK_ZERO,
- PHYTIMING_CLK_POST,
- PHYTIMING_CLK_TRAIL,
- PHYTIMING_HS_PREPARE,
- PHYTIMING_HS_ZERO,
- PHYTIMING_HS_TRAIL
-};
-
-static const unsigned int reg_values[] = {
- [RESET_TYPE] = DSIM_SWRST,
- [PLL_TIMER] = 500,
- [STOP_STATE_CNT] = 0xf,
- [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0x0af),
- [PHYCTRL_VREG_LP] = 0,
- [PHYCTRL_SLEW_UP] = 0,
- [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x06),
- [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0b),
- [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x07),
- [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x27),
- [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0d),
- [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x08),
- [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x09),
- [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x0d),
- [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0b),
-};
-
-static const unsigned int exynos5422_reg_values[] = {
- [RESET_TYPE] = DSIM_SWRST,
- [PLL_TIMER] = 500,
- [STOP_STATE_CNT] = 0xf,
- [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0xaf),
- [PHYCTRL_VREG_LP] = 0,
- [PHYCTRL_SLEW_UP] = 0,
- [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x08),
- [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0d),
- [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x09),
- [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x30),
- [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0e),
- [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x0a),
- [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x0c),
- [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x11),
- [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0d),
-};
-
-static const unsigned int exynos5433_reg_values[] = {
- [RESET_TYPE] = DSIM_FUNCRST,
- [PLL_TIMER] = 22200,
- [STOP_STATE_CNT] = 0xa,
- [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0x190),
- [PHYCTRL_VREG_LP] = DSIM_PHYCTRL_B_DPHYCTL_VREG_LP,
- [PHYCTRL_SLEW_UP] = DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP,
- [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x07),
- [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0c),
- [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x09),
- [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x2d),
- [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0e),
- [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x09),
- [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x0b),
- [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x10),
- [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0c),
-};
-
-static const struct exynos_dsi_driver_data exynos3_dsi_driver_data = {
- .reg_ofs = exynos_reg_ofs,
- .plltmr_reg = 0x50,
- .has_freqband = 1,
- .has_clklane_stop = 1,
- .num_clks = 2,
- .max_freq = 1000,
- .wait_for_reset = 1,
- .num_bits_resol = 11,
- .pll_p_offset = 13,
- .reg_values = reg_values,
-};
-
-static const struct exynos_dsi_driver_data exynos4_dsi_driver_data = {
- .reg_ofs = exynos_reg_ofs,
- .plltmr_reg = 0x50,
- .has_freqband = 1,
- .has_clklane_stop = 1,
- .num_clks = 2,
- .max_freq = 1000,
- .wait_for_reset = 1,
- .num_bits_resol = 11,
- .pll_p_offset = 13,
- .reg_values = reg_values,
-};
-
-static const struct exynos_dsi_driver_data exynos5_dsi_driver_data = {
- .reg_ofs = exynos_reg_ofs,
- .plltmr_reg = 0x58,
- .num_clks = 2,
- .max_freq = 1000,
- .wait_for_reset = 1,
- .num_bits_resol = 11,
- .pll_p_offset = 13,
- .reg_values = reg_values,
-};
-
-static const struct exynos_dsi_driver_data exynos5433_dsi_driver_data = {
- .reg_ofs = exynos5433_reg_ofs,
- .plltmr_reg = 0xa0,
- .has_clklane_stop = 1,
- .num_clks = 5,
- .max_freq = 1500,
- .wait_for_reset = 0,
- .num_bits_resol = 12,
- .pll_p_offset = 13,
- .reg_values = exynos5433_reg_values,
-};
-
-static const struct exynos_dsi_driver_data exynos5422_dsi_driver_data = {
- .reg_ofs = exynos5433_reg_ofs,
- .plltmr_reg = 0xa0,
- .has_clklane_stop = 1,
- .num_clks = 2,
- .max_freq = 1500,
- .wait_for_reset = 1,
- .num_bits_resol = 12,
- .pll_p_offset = 13,
- .reg_values = exynos5422_reg_values,
-};
-
-static const struct exynos_dsi_driver_data *
-exynos_dsi_types[DSIM_TYPE_COUNT] = {
- [DSIM_TYPE_EXYNOS3250] = &exynos3_dsi_driver_data,
- [DSIM_TYPE_EXYNOS4210] = &exynos4_dsi_driver_data,
- [DSIM_TYPE_EXYNOS5410] = &exynos5_dsi_driver_data,
- [DSIM_TYPE_EXYNOS5422] = &exynos5422_dsi_driver_data,
- [DSIM_TYPE_EXYNOS5433] = &exynos5433_dsi_driver_data,
-};
-
-static void exynos_dsi_wait_for_reset(struct exynos_dsi *dsi)
-{
- if (wait_for_completion_timeout(&dsi->completed, msecs_to_jiffies(300)))
- return;
-
- dev_err(dsi->dev, "timeout waiting for reset\n");
-}
-
-static void exynos_dsi_reset(struct exynos_dsi *dsi)
-{
- u32 reset_val = dsi->driver_data->reg_values[RESET_TYPE];
-
- reinit_completion(&dsi->completed);
- exynos_dsi_write(dsi, DSIM_SWRST_REG, reset_val);
-}
-
-#ifndef MHZ
-#define MHZ (1000*1000)
-#endif
-
-static unsigned long exynos_dsi_pll_find_pms(struct exynos_dsi *dsi,
- unsigned long fin, unsigned long fout, u8 *p, u16 *m, u8 *s)
-{
- const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
- unsigned long best_freq = 0;
- u32 min_delta = 0xffffffff;
- u8 p_min, p_max;
- u8 _p, best_p;
- u16 _m, best_m;
- u8 _s, best_s;
-
- p_min = DIV_ROUND_UP(fin, (12 * MHZ));
- p_max = fin / (6 * MHZ);
-
- for (_p = p_min; _p <= p_max; ++_p) {
- for (_s = 0; _s <= 5; ++_s) {
- u64 tmp;
- u32 delta;
-
- tmp = (u64)fout * (_p << _s);
- do_div(tmp, fin);
- _m = tmp;
- if (_m < 41 || _m > 125)
- continue;
-
- tmp = (u64)_m * fin;
- do_div(tmp, _p);
- if (tmp < 500 * MHZ ||
- tmp > driver_data->max_freq * MHZ)
- continue;
-
- tmp = (u64)_m * fin;
- do_div(tmp, _p << _s);
-
- delta = abs(fout - tmp);
- if (delta < min_delta) {
- best_p = _p;
- best_m = _m;
- best_s = _s;
- min_delta = delta;
- best_freq = tmp;
- }
- }
- }
-
- if (best_freq) {
- *p = best_p;
- *m = best_m;
- *s = best_s;
- }
-
- return best_freq;
-}
-
-static unsigned long exynos_dsi_set_pll(struct exynos_dsi *dsi,
- unsigned long freq)
-{
- const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
- unsigned long fin, fout;
- int timeout;
- u8 p, s;
- u16 m;
- u32 reg;
-
- fin = dsi->pll_clk_rate;
- fout = exynos_dsi_pll_find_pms(dsi, fin, freq, &p, &m, &s);
- if (!fout) {
- dev_err(dsi->dev,
- "failed to find PLL PMS for requested frequency\n");
- return 0;
- }
- dev_dbg(dsi->dev, "PLL freq %lu, (p %d, m %d, s %d)\n", fout, p, m, s);
-
- writel(driver_data->reg_values[PLL_TIMER],
- dsi->reg_base + driver_data->plltmr_reg);
-
- reg = DSIM_PLL_EN | DSIM_PLL_P(p, driver_data->pll_p_offset) |
- DSIM_PLL_M(m) | DSIM_PLL_S(s);
-
- if (driver_data->has_freqband) {
- static const unsigned long freq_bands[] = {
- 100 * MHZ, 120 * MHZ, 160 * MHZ, 200 * MHZ,
- 270 * MHZ, 320 * MHZ, 390 * MHZ, 450 * MHZ,
- 510 * MHZ, 560 * MHZ, 640 * MHZ, 690 * MHZ,
- 770 * MHZ, 870 * MHZ, 950 * MHZ,
- };
- int band;
-
- for (band = 0; band < ARRAY_SIZE(freq_bands); ++band)
- if (fout < freq_bands[band])
- break;
-
- dev_dbg(dsi->dev, "band %d\n", band);
-
- reg |= DSIM_FREQ_BAND(band);
- }
-
- exynos_dsi_write(dsi, DSIM_PLLCTRL_REG, reg);
-
- timeout = 1000;
- do {
- if (timeout-- == 0) {
- dev_err(dsi->dev, "PLL failed to stabilize\n");
- return 0;
- }
- reg = exynos_dsi_read(dsi, DSIM_STATUS_REG);
- } while ((reg & DSIM_PLL_STABLE) == 0);
-
- return fout;
-}
-
-static int exynos_dsi_enable_clock(struct exynos_dsi *dsi)
-{
- unsigned long hs_clk, byte_clk, esc_clk;
- unsigned long esc_div;
- u32 reg;
-
- hs_clk = exynos_dsi_set_pll(dsi, dsi->burst_clk_rate);
- if (!hs_clk) {
- dev_err(dsi->dev, "failed to configure DSI PLL\n");
- return -EFAULT;
- }
-
- byte_clk = hs_clk / 8;
- esc_div = DIV_ROUND_UP(byte_clk, dsi->esc_clk_rate);
- esc_clk = byte_clk / esc_div;
-
- if (esc_clk > 20 * MHZ) {
- ++esc_div;
- esc_clk = byte_clk / esc_div;
- }
-
- dev_dbg(dsi->dev, "hs_clk = %lu, byte_clk = %lu, esc_clk = %lu\n",
- hs_clk, byte_clk, esc_clk);
-
- reg = exynos_dsi_read(dsi, DSIM_CLKCTRL_REG);
- reg &= ~(DSIM_ESC_PRESCALER_MASK | DSIM_LANE_ESC_CLK_EN_CLK
- | DSIM_LANE_ESC_CLK_EN_DATA_MASK | DSIM_PLL_BYPASS
- | DSIM_BYTE_CLK_SRC_MASK);
- reg |= DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN
- | DSIM_ESC_PRESCALER(esc_div)
- | DSIM_LANE_ESC_CLK_EN_CLK
- | DSIM_LANE_ESC_CLK_EN_DATA(BIT(dsi->lanes) - 1)
- | DSIM_BYTE_CLK_SRC(0)
- | DSIM_TX_REQUEST_HSCLK;
- exynos_dsi_write(dsi, DSIM_CLKCTRL_REG, reg);
-
- return 0;
-}
-
-static void exynos_dsi_set_phy_ctrl(struct exynos_dsi *dsi)
-{
- const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
- const unsigned int *reg_values = driver_data->reg_values;
- u32 reg;
-
- if (driver_data->has_freqband)
- return;
-
- /* B D-PHY: D-PHY Master & Slave Analog Block control */
- reg = reg_values[PHYCTRL_ULPS_EXIT] | reg_values[PHYCTRL_VREG_LP] |
- reg_values[PHYCTRL_SLEW_UP];
- exynos_dsi_write(dsi, DSIM_PHYCTRL_REG, reg);
-
- /*
- * T LPX: Transmitted length of any Low-Power state period
- * T HS-EXIT: Time that the transmitter drives LP-11 following a HS
- * burst
- */
- reg = reg_values[PHYTIMING_LPX] | reg_values[PHYTIMING_HS_EXIT];
- exynos_dsi_write(dsi, DSIM_PHYTIMING_REG, reg);
-
- /*
- * T CLK-PREPARE: Time that the transmitter drives the Clock Lane LP-00
- * Line state immediately before the HS-0 Line state starting the
- * HS transmission
- * T CLK-ZERO: Time that the transmitter drives the HS-0 state prior to
- * transmitting the Clock.
- * T CLK_POST: Time that the transmitter continues to send HS clock
- * after the last associated Data Lane has transitioned to LP Mode
- * Interval is defined as the period from the end of T HS-TRAIL to
- * the beginning of T CLK-TRAIL
- * T CLK-TRAIL: Time that the transmitter drives the HS-0 state after
- * the last payload clock bit of a HS transmission burst
- */
- reg = reg_values[PHYTIMING_CLK_PREPARE] |
- reg_values[PHYTIMING_CLK_ZERO] |
- reg_values[PHYTIMING_CLK_POST] |
- reg_values[PHYTIMING_CLK_TRAIL];
-
- exynos_dsi_write(dsi, DSIM_PHYTIMING1_REG, reg);
-
- /*
- * T HS-PREPARE: Time that the transmitter drives the Data Lane LP-00
- * Line state immediately before the HS-0 Line state starting the
- * HS transmission
- * T HS-ZERO: Time that the transmitter drives the HS-0 state prior to
- * transmitting the Sync sequence.
- * T HS-TRAIL: Time that the transmitter drives the flipped differential
- * state after last payload data bit of a HS transmission burst
- */
- reg = reg_values[PHYTIMING_HS_PREPARE] | reg_values[PHYTIMING_HS_ZERO] |
- reg_values[PHYTIMING_HS_TRAIL];
- exynos_dsi_write(dsi, DSIM_PHYTIMING2_REG, reg);
-}
-
-static void exynos_dsi_disable_clock(struct exynos_dsi *dsi)
-{
- u32 reg;
-
- reg = exynos_dsi_read(dsi, DSIM_CLKCTRL_REG);
- reg &= ~(DSIM_LANE_ESC_CLK_EN_CLK | DSIM_LANE_ESC_CLK_EN_DATA_MASK
- | DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN);
- exynos_dsi_write(dsi, DSIM_CLKCTRL_REG, reg);
-
- reg = exynos_dsi_read(dsi, DSIM_PLLCTRL_REG);
- reg &= ~DSIM_PLL_EN;
- exynos_dsi_write(dsi, DSIM_PLLCTRL_REG, reg);
-}
-
-static void exynos_dsi_enable_lane(struct exynos_dsi *dsi, u32 lane)
-{
- u32 reg = exynos_dsi_read(dsi, DSIM_CONFIG_REG);
- reg |= (DSIM_NUM_OF_DATA_LANE(dsi->lanes - 1) | DSIM_LANE_EN_CLK |
- DSIM_LANE_EN(lane));
- exynos_dsi_write(dsi, DSIM_CONFIG_REG, reg);
-}
-
-static int exynos_dsi_init_link(struct exynos_dsi *dsi)
-{
- const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
- int timeout;
- u32 reg;
- u32 lanes_mask;
-
- /* Initialize FIFO pointers */
- reg = exynos_dsi_read(dsi, DSIM_FIFOCTRL_REG);
- reg &= ~0x1f;
- exynos_dsi_write(dsi, DSIM_FIFOCTRL_REG, reg);
-
- usleep_range(9000, 11000);
-
- reg |= 0x1f;
- exynos_dsi_write(dsi, DSIM_FIFOCTRL_REG, reg);
- usleep_range(9000, 11000);
-
- /* DSI configuration */
- reg = 0;
-
- /*
- * The first bit of mode_flags specifies display configuration.
- * If this bit is set[= MIPI_DSI_MODE_VIDEO], dsi will support video
- * mode, otherwise it will support command mode.
- */
- if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
- reg |= DSIM_VIDEO_MODE;
-
- /*
- * The user manual describes that following bits are ignored in
- * command mode.
- */
- if (!(dsi->mode_flags & MIPI_DSI_MODE_VSYNC_FLUSH))
- reg |= DSIM_MFLUSH_VS;
- if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
- reg |= DSIM_SYNC_INFORM;
- if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
- reg |= DSIM_BURST_MODE;
- if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_AUTO_VERT)
- reg |= DSIM_AUTO_MODE;
- if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HSE)
- reg |= DSIM_HSE_DISABLE_MODE;
- if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HFP)
- reg |= DSIM_HFP_DISABLE_MODE;
- if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HBP)
- reg |= DSIM_HBP_DISABLE_MODE;
- if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HSA)
- reg |= DSIM_HSA_DISABLE_MODE;
- }
-
- if (dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET)
- reg |= DSIM_EOT_DISABLE;
-
- switch (dsi->format) {
- case MIPI_DSI_FMT_RGB888:
- reg |= DSIM_MAIN_PIX_FORMAT_RGB888;
- break;
- case MIPI_DSI_FMT_RGB666:
- reg |= DSIM_MAIN_PIX_FORMAT_RGB666;
- break;
- case MIPI_DSI_FMT_RGB666_PACKED:
- reg |= DSIM_MAIN_PIX_FORMAT_RGB666_P;
- break;
- case MIPI_DSI_FMT_RGB565:
- reg |= DSIM_MAIN_PIX_FORMAT_RGB565;
- break;
- default:
- dev_err(dsi->dev, "invalid pixel format\n");
- return -EINVAL;
- }
-
- /*
- * Use non-continuous clock mode if the periparal wants and
- * host controller supports
- *
- * In non-continous clock mode, host controller will turn off
- * the HS clock between high-speed transmissions to reduce
- * power consumption.
- */
- if (driver_data->has_clklane_stop &&
- dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) {
- reg |= DSIM_CLKLANE_STOP;
- }
- exynos_dsi_write(dsi, DSIM_CONFIG_REG, reg);
-
- lanes_mask = BIT(dsi->lanes) - 1;
- exynos_dsi_enable_lane(dsi, lanes_mask);
-
- /* Check clock and data lane state are stop state */
- timeout = 100;
- do {
- if (timeout-- == 0) {
- dev_err(dsi->dev, "waiting for bus lanes timed out\n");
- return -EFAULT;
- }
-
- reg = exynos_dsi_read(dsi, DSIM_STATUS_REG);
- if ((reg & DSIM_STOP_STATE_DAT(lanes_mask))
- != DSIM_STOP_STATE_DAT(lanes_mask))
- continue;
- } while (!(reg & (DSIM_STOP_STATE_CLK | DSIM_TX_READY_HS_CLK)));
-
- reg = exynos_dsi_read(dsi, DSIM_ESCMODE_REG);
- reg &= ~DSIM_STOP_STATE_CNT_MASK;
- reg |= DSIM_STOP_STATE_CNT(driver_data->reg_values[STOP_STATE_CNT]);
- exynos_dsi_write(dsi, DSIM_ESCMODE_REG, reg);
-
- reg = DSIM_BTA_TIMEOUT(0xff) | DSIM_LPDR_TIMEOUT(0xffff);
- exynos_dsi_write(dsi, DSIM_TIMEOUT_REG, reg);
-
- return 0;
-}
-
-static void exynos_dsi_set_display_mode(struct exynos_dsi *dsi)
-{
- struct drm_display_mode *m = &dsi->mode;
- unsigned int num_bits_resol = dsi->driver_data->num_bits_resol;
- u32 reg;
-
- if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
- reg = DSIM_CMD_ALLOW(0xf)
- | DSIM_STABLE_VFP(m->vsync_start - m->vdisplay)
- | DSIM_MAIN_VBP(m->vtotal - m->vsync_end);
- exynos_dsi_write(dsi, DSIM_MVPORCH_REG, reg);
-
- reg = DSIM_MAIN_HFP(m->hsync_start - m->hdisplay)
- | DSIM_MAIN_HBP(m->htotal - m->hsync_end);
- exynos_dsi_write(dsi, DSIM_MHPORCH_REG, reg);
-
- reg = DSIM_MAIN_VSA(m->vsync_end - m->vsync_start)
- | DSIM_MAIN_HSA(m->hsync_end - m->hsync_start);
- exynos_dsi_write(dsi, DSIM_MSYNC_REG, reg);
- }
- reg = DSIM_MAIN_HRESOL(m->hdisplay, num_bits_resol) |
- DSIM_MAIN_VRESOL(m->vdisplay, num_bits_resol);
-
- exynos_dsi_write(dsi, DSIM_MDRESOL_REG, reg);
-
- dev_dbg(dsi->dev, "LCD size = %dx%d\n", m->hdisplay, m->vdisplay);
-}
-
-static void exynos_dsi_set_display_enable(struct exynos_dsi *dsi, bool enable)
-{
- u32 reg;
-
- reg = exynos_dsi_read(dsi, DSIM_MDRESOL_REG);
- if (enable)
- reg |= DSIM_MAIN_STAND_BY;
- else
- reg &= ~DSIM_MAIN_STAND_BY;
- exynos_dsi_write(dsi, DSIM_MDRESOL_REG, reg);
-}
-
-static int exynos_dsi_wait_for_hdr_fifo(struct exynos_dsi *dsi)
-{
- int timeout = 2000;
-
- do {
- u32 reg = exynos_dsi_read(dsi, DSIM_FIFOCTRL_REG);
-
- if (!(reg & DSIM_SFR_HEADER_FULL))
- return 0;
-
- if (!cond_resched())
- usleep_range(950, 1050);
- } while (--timeout);
-
- return -ETIMEDOUT;
-}
-
-static void exynos_dsi_set_cmd_lpm(struct exynos_dsi *dsi, bool lpm)
-{
- u32 v = exynos_dsi_read(dsi, DSIM_ESCMODE_REG);
-
- if (lpm)
- v |= DSIM_CMD_LPDT_LP;
- else
- v &= ~DSIM_CMD_LPDT_LP;
-
- exynos_dsi_write(dsi, DSIM_ESCMODE_REG, v);
-}
-
-static void exynos_dsi_force_bta(struct exynos_dsi *dsi)
-{
- u32 v = exynos_dsi_read(dsi, DSIM_ESCMODE_REG);
- v |= DSIM_FORCE_BTA;
- exynos_dsi_write(dsi, DSIM_ESCMODE_REG, v);
-}
-
-static void exynos_dsi_send_to_fifo(struct exynos_dsi *dsi,
- struct exynos_dsi_transfer *xfer)
-{
- struct device *dev = dsi->dev;
- struct mipi_dsi_packet *pkt = &xfer->packet;
- const u8 *payload = pkt->payload + xfer->tx_done;
- u16 length = pkt->payload_length - xfer->tx_done;
- bool first = !xfer->tx_done;
- u32 reg;
-
- dev_dbg(dev, "< xfer %pK: tx len %u, done %u, rx len %u, done %u\n",
- xfer, length, xfer->tx_done, xfer->rx_len, xfer->rx_done);
-
- if (length > DSI_TX_FIFO_SIZE)
- length = DSI_TX_FIFO_SIZE;
-
- xfer->tx_done += length;
-
- /* Send payload */
- while (length >= 4) {
- reg = get_unaligned_le32(payload);
- exynos_dsi_write(dsi, DSIM_PAYLOAD_REG, reg);
- payload += 4;
- length -= 4;
- }
-
- reg = 0;
- switch (length) {
- case 3:
- reg |= payload[2] << 16;
- fallthrough;
- case 2:
- reg |= payload[1] << 8;
- fallthrough;
- case 1:
- reg |= payload[0];
- exynos_dsi_write(dsi, DSIM_PAYLOAD_REG, reg);
- break;
- }
-
- /* Send packet header */
- if (!first)
- return;
-
- reg = get_unaligned_le32(pkt->header);
- if (exynos_dsi_wait_for_hdr_fifo(dsi)) {
- dev_err(dev, "waiting for header FIFO timed out\n");
- return;
- }
-
- if (NEQV(xfer->flags & MIPI_DSI_MSG_USE_LPM,
- dsi->state & DSIM_STATE_CMD_LPM)) {
- exynos_dsi_set_cmd_lpm(dsi, xfer->flags & MIPI_DSI_MSG_USE_LPM);
- dsi->state ^= DSIM_STATE_CMD_LPM;
- }
-
- exynos_dsi_write(dsi, DSIM_PKTHDR_REG, reg);
-
- if (xfer->flags & MIPI_DSI_MSG_REQ_ACK)
- exynos_dsi_force_bta(dsi);
-}
-
-static void exynos_dsi_read_from_fifo(struct exynos_dsi *dsi,
- struct exynos_dsi_transfer *xfer)
-{
- u8 *payload = xfer->rx_payload + xfer->rx_done;
- bool first = !xfer->rx_done;
- struct device *dev = dsi->dev;
- u16 length;
- u32 reg;
-
- if (first) {
- reg = exynos_dsi_read(dsi, DSIM_RXFIFO_REG);
-
- switch (reg & 0x3f) {
- case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
- case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
- if (xfer->rx_len >= 2) {
- payload[1] = reg >> 16;
- ++xfer->rx_done;
- }
- fallthrough;
- case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
- case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
- payload[0] = reg >> 8;
- ++xfer->rx_done;
- xfer->rx_len = xfer->rx_done;
- xfer->result = 0;
- goto clear_fifo;
- case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
- dev_err(dev, "DSI Error Report: 0x%04x\n",
- (reg >> 8) & 0xffff);
- xfer->result = 0;
- goto clear_fifo;
- }
-
- length = (reg >> 8) & 0xffff;
- if (length > xfer->rx_len) {
- dev_err(dev,
- "response too long (%u > %u bytes), stripping\n",
- xfer->rx_len, length);
- length = xfer->rx_len;
- } else if (length < xfer->rx_len)
- xfer->rx_len = length;
- }
-
- length = xfer->rx_len - xfer->rx_done;
- xfer->rx_done += length;
-
- /* Receive payload */
- while (length >= 4) {
- reg = exynos_dsi_read(dsi, DSIM_RXFIFO_REG);
- payload[0] = (reg >> 0) & 0xff;
- payload[1] = (reg >> 8) & 0xff;
- payload[2] = (reg >> 16) & 0xff;
- payload[3] = (reg >> 24) & 0xff;
- payload += 4;
- length -= 4;
- }
-
- if (length) {
- reg = exynos_dsi_read(dsi, DSIM_RXFIFO_REG);
- switch (length) {
- case 3:
- payload[2] = (reg >> 16) & 0xff;
- fallthrough;
- case 2:
- payload[1] = (reg >> 8) & 0xff;
- fallthrough;
- case 1:
- payload[0] = reg & 0xff;
- }
- }
-
- if (xfer->rx_done == xfer->rx_len)
- xfer->result = 0;
-
-clear_fifo:
- length = DSI_RX_FIFO_SIZE / 4;
- do {
- reg = exynos_dsi_read(dsi, DSIM_RXFIFO_REG);
- if (reg == DSI_RX_FIFO_EMPTY)
- break;
- } while (--length);
-}
-
-static void exynos_dsi_transfer_start(struct exynos_dsi *dsi)
-{
- unsigned long flags;
- struct exynos_dsi_transfer *xfer;
- bool start = false;
-
-again:
- spin_lock_irqsave(&dsi->transfer_lock, flags);
-
- if (list_empty(&dsi->transfer_list)) {
- spin_unlock_irqrestore(&dsi->transfer_lock, flags);
- return;
- }
-
- xfer = list_first_entry(&dsi->transfer_list,
- struct exynos_dsi_transfer, list);
-
- spin_unlock_irqrestore(&dsi->transfer_lock, flags);
-
- if (xfer->packet.payload_length &&
- xfer->tx_done == xfer->packet.payload_length)
- /* waiting for RX */
- return;
-
- exynos_dsi_send_to_fifo(dsi, xfer);
-
- if (xfer->packet.payload_length || xfer->rx_len)
- return;
-
- xfer->result = 0;
- complete(&xfer->completed);
-
- spin_lock_irqsave(&dsi->transfer_lock, flags);
-
- list_del_init(&xfer->list);
- start = !list_empty(&dsi->transfer_list);
-
- spin_unlock_irqrestore(&dsi->transfer_lock, flags);
-
- if (start)
- goto again;
-}
-
-static bool exynos_dsi_transfer_finish(struct exynos_dsi *dsi)
-{
- struct exynos_dsi_transfer *xfer;
- unsigned long flags;
- bool start = true;
-
- spin_lock_irqsave(&dsi->transfer_lock, flags);
-
- if (list_empty(&dsi->transfer_list)) {
- spin_unlock_irqrestore(&dsi->transfer_lock, flags);
- return false;
- }
-
- xfer = list_first_entry(&dsi->transfer_list,
- struct exynos_dsi_transfer, list);
-
- spin_unlock_irqrestore(&dsi->transfer_lock, flags);
-
- dev_dbg(dsi->dev,
- "> xfer %pK, tx_len %zu, tx_done %u, rx_len %u, rx_done %u\n",
- xfer, xfer->packet.payload_length, xfer->tx_done, xfer->rx_len,
- xfer->rx_done);
-
- if (xfer->tx_done != xfer->packet.payload_length)
- return true;
-
- if (xfer->rx_done != xfer->rx_len)
- exynos_dsi_read_from_fifo(dsi, xfer);
-
- if (xfer->rx_done != xfer->rx_len)
- return true;
-
- spin_lock_irqsave(&dsi->transfer_lock, flags);
-
- list_del_init(&xfer->list);
- start = !list_empty(&dsi->transfer_list);
-
- spin_unlock_irqrestore(&dsi->transfer_lock, flags);
-
- if (!xfer->rx_len)
- xfer->result = 0;
- complete(&xfer->completed);
-
- return start;
-}
-
-static void exynos_dsi_remove_transfer(struct exynos_dsi *dsi,
- struct exynos_dsi_transfer *xfer)
-{
- unsigned long flags;
- bool start;
-
- spin_lock_irqsave(&dsi->transfer_lock, flags);
-
- if (!list_empty(&dsi->transfer_list) &&
- xfer == list_first_entry(&dsi->transfer_list,
- struct exynos_dsi_transfer, list)) {
- list_del_init(&xfer->list);
- start = !list_empty(&dsi->transfer_list);
- spin_unlock_irqrestore(&dsi->transfer_lock, flags);
- if (start)
- exynos_dsi_transfer_start(dsi);
- return;
- }
-
- list_del_init(&xfer->list);
-
- spin_unlock_irqrestore(&dsi->transfer_lock, flags);
-}
-
-static int exynos_dsi_transfer(struct exynos_dsi *dsi,
- struct exynos_dsi_transfer *xfer)
-{
- unsigned long flags;
- bool stopped;
-
- xfer->tx_done = 0;
- xfer->rx_done = 0;
- xfer->result = -ETIMEDOUT;
- init_completion(&xfer->completed);
-
- spin_lock_irqsave(&dsi->transfer_lock, flags);
-
- stopped = list_empty(&dsi->transfer_list);
- list_add_tail(&xfer->list, &dsi->transfer_list);
-
- spin_unlock_irqrestore(&dsi->transfer_lock, flags);
-
- if (stopped)
- exynos_dsi_transfer_start(dsi);
-
- wait_for_completion_timeout(&xfer->completed,
- msecs_to_jiffies(DSI_XFER_TIMEOUT_MS));
- if (xfer->result == -ETIMEDOUT) {
- struct mipi_dsi_packet *pkt = &xfer->packet;
- exynos_dsi_remove_transfer(dsi, xfer);
- dev_err(dsi->dev, "xfer timed out: %*ph %*ph\n", 4, pkt->header,
- (int)pkt->payload_length, pkt->payload);
- return -ETIMEDOUT;
- }
-
- /* Also covers hardware timeout condition */
- return xfer->result;
-}
-
-static irqreturn_t exynos_dsi_irq(int irq, void *dev_id)
-{
- struct exynos_dsi *dsi = dev_id;
- u32 status;
-
- status = exynos_dsi_read(dsi, DSIM_INTSRC_REG);
- if (!status) {
- static unsigned long int j;
- if (printk_timed_ratelimit(&j, 500))
- dev_warn(dsi->dev, "spurious interrupt\n");
- return IRQ_HANDLED;
- }
- exynos_dsi_write(dsi, DSIM_INTSRC_REG, status);
-
- if (status & DSIM_INT_SW_RST_RELEASE) {
- u32 mask = ~(DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY |
- DSIM_INT_SFR_HDR_FIFO_EMPTY | DSIM_INT_RX_ECC_ERR |
- DSIM_INT_SW_RST_RELEASE);
- exynos_dsi_write(dsi, DSIM_INTMSK_REG, mask);
- complete(&dsi->completed);
- return IRQ_HANDLED;
- }
-
- if (!(status & (DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY |
- DSIM_INT_PLL_STABLE)))
- return IRQ_HANDLED;
-
- if (exynos_dsi_transfer_finish(dsi))
- exynos_dsi_transfer_start(dsi);
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t exynos_dsi_te_irq_handler(int irq, void *dev_id)
-{
- struct exynos_dsi *dsi = (struct exynos_dsi *)dev_id;
- const struct exynos_dsi_plat_data *pdata = dsi->plat_data;
-
- if (pdata->host_ops && pdata->host_ops->te_irq_handler)
- return pdata->host_ops->te_irq_handler(dsi);
-
- return IRQ_HANDLED;
-}
-
-static void exynos_dsi_enable_irq(struct exynos_dsi *dsi)
-{
- enable_irq(dsi->irq);
-
- if (dsi->te_gpio)
- enable_irq(gpiod_to_irq(dsi->te_gpio));
-}
-
-static void exynos_dsi_disable_irq(struct exynos_dsi *dsi)
-{
- if (dsi->te_gpio)
- disable_irq(gpiod_to_irq(dsi->te_gpio));
-
- disable_irq(dsi->irq);
-}
-
-static int exynos_dsi_init(struct exynos_dsi *dsi)
-{
- const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
-
- if (dsi->state & DSIM_STATE_INITIALIZED)
- return 0;
-
- exynos_dsi_reset(dsi);
- exynos_dsi_enable_irq(dsi);
-
- if (driver_data->reg_values[RESET_TYPE] == DSIM_FUNCRST)
- exynos_dsi_enable_lane(dsi, BIT(dsi->lanes) - 1);
-
- exynos_dsi_enable_clock(dsi);
- if (driver_data->wait_for_reset)
- exynos_dsi_wait_for_reset(dsi);
- exynos_dsi_set_phy_ctrl(dsi);
- exynos_dsi_init_link(dsi);
-
- dsi->state |= DSIM_STATE_INITIALIZED;
-
- return 0;
-}
-
-static int exynos_dsi_register_te_irq(struct exynos_dsi *dsi,
- struct device *panel)
-{
- int ret;
- int te_gpio_irq;
-
- dsi->te_gpio = gpiod_get_optional(panel, "te", GPIOD_IN);
- if (!dsi->te_gpio) {
- return 0;
- } else if (IS_ERR(dsi->te_gpio)) {
- dev_err(dsi->dev, "gpio request failed with %ld\n",
- PTR_ERR(dsi->te_gpio));
- return PTR_ERR(dsi->te_gpio);
- }
-
- te_gpio_irq = gpiod_to_irq(dsi->te_gpio);
-
- ret = request_threaded_irq(te_gpio_irq, exynos_dsi_te_irq_handler, NULL,
- IRQF_TRIGGER_RISING | IRQF_NO_AUTOEN, "TE", dsi);
- if (ret) {
- dev_err(dsi->dev, "request interrupt failed with %d\n", ret);
- gpiod_put(dsi->te_gpio);
- return ret;
- }
-
- return 0;
-}
-
-static void exynos_dsi_unregister_te_irq(struct exynos_dsi *dsi)
-{
- if (dsi->te_gpio) {
- free_irq(gpiod_to_irq(dsi->te_gpio), dsi);
- gpiod_put(dsi->te_gpio);
- }
-}
-
-static void exynos_dsi_atomic_pre_enable(struct drm_bridge *bridge,
- struct drm_bridge_state *old_bridge_state)
-{
- struct exynos_dsi *dsi = bridge_to_dsi(bridge);
- int ret;
-
- if (dsi->state & DSIM_STATE_ENABLED)
- return;
-
- ret = pm_runtime_resume_and_get(dsi->dev);
- if (ret < 0) {
- dev_err(dsi->dev, "failed to enable DSI device.\n");
- return;
- }
-
- dsi->state |= DSIM_STATE_ENABLED;
-
- /*
- * For Exynos-DSIM the downstream bridge, or panel are expecting
- * the host initialization during DSI transfer.
- */
- if (!exynos_dsi_hw_is_exynos(dsi->plat_data->hw_type)) {
- ret = exynos_dsi_init(dsi);
- if (ret)
- return;
- }
-}
-
-static void exynos_dsi_atomic_enable(struct drm_bridge *bridge,
- struct drm_bridge_state *old_bridge_state)
-{
- struct exynos_dsi *dsi = bridge_to_dsi(bridge);
-
- exynos_dsi_set_display_mode(dsi);
- exynos_dsi_set_display_enable(dsi, true);
-
- dsi->state |= DSIM_STATE_VIDOUT_AVAILABLE;
-
- return;
-}
-
-static void exynos_dsi_atomic_disable(struct drm_bridge *bridge,
- struct drm_bridge_state *old_bridge_state)
-{
- struct exynos_dsi *dsi = bridge_to_dsi(bridge);
-
- if (!(dsi->state & DSIM_STATE_ENABLED))
- return;
-
- dsi->state &= ~DSIM_STATE_VIDOUT_AVAILABLE;
-}
-
-static void exynos_dsi_atomic_post_disable(struct drm_bridge *bridge,
- struct drm_bridge_state *old_bridge_state)
-{
- struct exynos_dsi *dsi = bridge_to_dsi(bridge);
-
- exynos_dsi_set_display_enable(dsi, false);
-
- dsi->state &= ~DSIM_STATE_ENABLED;
- pm_runtime_put_sync(dsi->dev);
-}
-
-/*
- * This pixel output formats list referenced from,
- * AN13573 i.MX 8/RT MIPI DSI/CSI-2, Rev. 0, 21 March 2022
- * 3.7.4 Pixel formats
- * Table 14. DSI pixel packing formats
- */
-static const u32 exynos_dsi_pixel_output_fmts[] = {
- MEDIA_BUS_FMT_YUYV10_1X20,
- MEDIA_BUS_FMT_YUYV12_1X24,
- MEDIA_BUS_FMT_UYVY8_1X16,
- MEDIA_BUS_FMT_RGB101010_1X30,
- MEDIA_BUS_FMT_RGB121212_1X36,
- MEDIA_BUS_FMT_RGB565_1X16,
- MEDIA_BUS_FMT_RGB666_1X18,
- MEDIA_BUS_FMT_RGB888_1X24,
-};
-
-static bool exynos_dsi_pixel_output_fmt_supported(u32 fmt)
-{
- int i;
-
- if (fmt == MEDIA_BUS_FMT_FIXED)
- return false;
-
- for (i = 0; i < ARRAY_SIZE(exynos_dsi_pixel_output_fmts); i++) {
- if (exynos_dsi_pixel_output_fmts[i] == fmt)
- return true;
- }
-
- return false;
-}
-
-static u32 *
-exynos_dsi_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
- struct drm_bridge_state *bridge_state,
- struct drm_crtc_state *crtc_state,
- struct drm_connector_state *conn_state,
- u32 output_fmt,
- unsigned int *num_input_fmts)
-{
- u32 *input_fmts;
-
- input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
- if (!input_fmts)
- return NULL;
-
- if (!exynos_dsi_pixel_output_fmt_supported(output_fmt))
- /*
- * Some bridge/display drivers are still not able to pass the
- * correct format, so handle those pipelines by falling back
- * to the default format till the supported formats finalized.
- */
- output_fmt = MEDIA_BUS_FMT_RGB888_1X24;
-
- input_fmts[0] = output_fmt;
- *num_input_fmts = 1;
-
- return input_fmts;
-}
-
-static int exynos_dsi_atomic_check(struct drm_bridge *bridge,
- struct drm_bridge_state *bridge_state,
- struct drm_crtc_state *crtc_state,
- struct drm_connector_state *conn_state)
-{
- struct exynos_dsi *dsi = bridge_to_dsi(bridge);
- struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
-
- /*
- * The i.MX8M Mini/Nano glue logic between LCDIF and DSIM
- * inverts HS/VS/DE sync signals polarity, therefore, while
- * i.MX 8M Mini Applications Processor Reference Manual Rev. 3, 11/2020
- * 13.6.3.5.2 RGB interface
- * i.MX 8M Nano Applications Processor Reference Manual Rev. 2, 07/2022
- * 13.6.2.7.2 RGB interface
- * both claim "Vsync, Hsync, and VDEN are active high signals.", the
- * LCDIF must generate inverted HS/VS/DE signals, i.e. active LOW.
- */
- if (dsi->plat_data->hw_type == DSIM_TYPE_IMX8MM) {
- adjusted_mode->flags |= (DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC);
- adjusted_mode->flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
- }
-
- return 0;
-}
-
-static void exynos_dsi_mode_set(struct drm_bridge *bridge,
- const struct drm_display_mode *mode,
- const struct drm_display_mode *adjusted_mode)
-{
- struct exynos_dsi *dsi = bridge_to_dsi(bridge);
-
- drm_mode_copy(&dsi->mode, adjusted_mode);
-}
-
-static int exynos_dsi_attach(struct drm_bridge *bridge,
- enum drm_bridge_attach_flags flags)
-{
- struct exynos_dsi *dsi = bridge_to_dsi(bridge);
-
- return drm_bridge_attach(bridge->encoder, dsi->out_bridge, bridge,
- flags);
-}
-
-static const struct drm_bridge_funcs exynos_dsi_bridge_funcs = {
- .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
- .atomic_reset = drm_atomic_helper_bridge_reset,
- .atomic_get_input_bus_fmts = exynos_dsi_atomic_get_input_bus_fmts,
- .atomic_check = exynos_dsi_atomic_check,
- .atomic_pre_enable = exynos_dsi_atomic_pre_enable,
- .atomic_enable = exynos_dsi_atomic_enable,
- .atomic_disable = exynos_dsi_atomic_disable,
- .atomic_post_disable = exynos_dsi_atomic_post_disable,
- .mode_set = exynos_dsi_mode_set,
- .attach = exynos_dsi_attach,
-};
-
-static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
- struct mipi_dsi_device *device)
-{
- struct exynos_dsi *dsi = host_to_dsi(host);
- const struct exynos_dsi_plat_data *pdata = dsi->plat_data;
- struct device *dev = dsi->dev;
- int ret;
-
- dsi->out_bridge = devm_drm_of_dsi_get_bridge(dev, dev->of_node, 1, 0);
- if (IS_ERR(dsi->out_bridge)) {
- ret = PTR_ERR(dsi->out_bridge);
- DRM_DEV_ERROR(dev, "failed to find the bridge: %d\n", ret);
- return ret;
- }
-
- DRM_DEV_INFO(dev, "Attached %s device\n", device->name);
-
- drm_bridge_add(&dsi->bridge);
-
- if (pdata->host_ops && pdata->host_ops->attach) {
- ret = pdata->host_ops->attach(dsi, device);
- if (ret < 0)
- return ret;
- }
-
- dsi->lanes = device->lanes;
- dsi->format = device->format;
- dsi->mode_flags = device->mode_flags;
-
- return 0;
-}
-
-static int exynos_dsi_host_detach(struct mipi_dsi_host *host,
- struct mipi_dsi_device *device)
-{
- struct exynos_dsi *dsi = host_to_dsi(host);
- const struct exynos_dsi_plat_data *pdata = dsi->plat_data;
- int ret;
-
- if (pdata->host_ops && pdata->host_ops->detach) {
- ret = pdata->host_ops->detach(dsi, device);
- if (ret < 0)
- return ret;
- }
-
- drm_bridge_remove(&dsi->bridge);
-
- return 0;
-}
-
-static ssize_t exynos_dsi_host_transfer(struct mipi_dsi_host *host,
- const struct mipi_dsi_msg *msg)
-{
- struct exynos_dsi *dsi = host_to_dsi(host);
- struct exynos_dsi_transfer xfer;
- int ret;
-
- if (!(dsi->state & DSIM_STATE_ENABLED))
- return -EINVAL;
-
- ret = exynos_dsi_init(dsi);
- if (ret)
- return ret;
-
- ret = mipi_dsi_create_packet(&xfer.packet, msg);
- if (ret < 0)
- return ret;
-
- xfer.rx_len = msg->rx_len;
- xfer.rx_payload = msg->rx_buf;
- xfer.flags = msg->flags;
-
- ret = exynos_dsi_transfer(dsi, &xfer);
- return (ret < 0) ? ret : xfer.rx_done;
-}
-
-static const struct mipi_dsi_host_ops exynos_dsi_ops = {
- .attach = exynos_dsi_host_attach,
- .detach = exynos_dsi_host_detach,
- .transfer = exynos_dsi_host_transfer,
-};
-
-static int exynos_dsi_of_read_u32(const struct device_node *np,
- const char *propname, u32 *out_value)
-{
- int ret = of_property_read_u32(np, propname, out_value);
-
- if (ret < 0)
- pr_err("%pOF: failed to get '%s' property\n", np, propname);
-
- return ret;
-}
-
-static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
+static irqreturn_t exynos_dsi_te_irq_handler(struct samsung_dsim *dsim)
{
- struct device *dev = dsi->dev;
- struct device_node *node = dev->of_node;
- int ret;
-
- ret = exynos_dsi_of_read_u32(node, "samsung,pll-clock-frequency",
- &dsi->pll_clk_rate);
- if (ret < 0)
- return ret;
-
- ret = exynos_dsi_of_read_u32(node, "samsung,burst-clock-frequency",
- &dsi->burst_clk_rate);
- if (ret < 0)
- return ret;
-
- ret = exynos_dsi_of_read_u32(node, "samsung,esc-clock-frequency",
- &dsi->esc_clk_rate);
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
-static irqreturn_t _exynos_dsi_te_irq_handler(struct exynos_dsi *dsim)
-{
- struct exynos_dsi_enc *dsi_enc = dsim->priv;
- struct drm_encoder *encoder = &dsi_enc->encoder;
+ struct exynos_dsi *dsi = dsim->priv;
+ struct drm_encoder *encoder = &dsi->encoder;
if (dsim->state & DSIM_STATE_VIDOUT_AVAILABLE)
exynos_drm_crtc_te_handler(encoder->crtc);
@@ -1727,31 +32,18 @@ static irqreturn_t _exynos_dsi_te_irq_handler(struct exynos_dsi *dsim)
return IRQ_HANDLED;
}
-static int _exynos_dsi_host_attach(struct exynos_dsi *dsim,
+static void exynos_dsi_host_attach(struct samsung_dsim *dsim,
struct mipi_dsi_device *device)
{
- struct exynos_dsi_enc *dsi_enc = dsim->priv;
- struct drm_encoder *encoder = &dsi_enc->encoder;
+ struct exynos_dsi *dsi = dsim->priv;
+ struct drm_encoder *encoder = &dsi->encoder;
struct drm_device *drm = encoder->dev;
- int ret;
drm_bridge_attach(encoder, &dsim->bridge,
list_first_entry_or_null(&encoder->bridge_chain,
struct drm_bridge,
chain_node), 0);
- /*
- * This is a temporary solution and should be made by more generic way.
- *
- * If attached panel device is for command mode one, dsi should register
- * TE interrupt handler.
- */
- if (!(device->mode_flags & MIPI_DSI_MODE_VIDEO)) {
- ret = exynos_dsi_register_te_irq(dsim, &device->dev);
- if (ret)
- return ret;
- }
-
mutex_lock(&drm->mode_config.mutex);
dsim->lanes = device->lanes;
@@ -1764,30 +56,23 @@ static int _exynos_dsi_host_attach(struct exynos_dsi *dsim,
if (drm->mode_config.poll_enabled)
drm_kms_helper_hotplug_event(drm);
-
- return 0;
}
-static int _exynos_dsi_host_detach(struct exynos_dsi *dsim,
+static void exynos_dsi_host_detach(struct samsung_dsim *dsim,
struct mipi_dsi_device *device)
{
- struct exynos_dsi_enc *dsi_enc = dsim->priv;
- struct drm_device *drm = dsi_enc->encoder.dev;
+ struct exynos_dsi *dsi = dsim->priv;
+ struct drm_device *drm = dsi->encoder.dev;
if (drm->mode_config.poll_enabled)
drm_kms_helper_hotplug_event(drm);
-
- exynos_dsi_unregister_te_irq(dsim);
-
- return 0;
}
-static int exynos_dsi_bind(struct device *dev, struct device *master,
- void *data)
+static int exynos_dsi_bind(struct device *dev, struct device *master, void *data)
{
- struct exynos_dsi *dsi = dev_get_drvdata(dev);
- struct exynos_dsi_enc *dsi_enc = dsi->priv;
- struct drm_encoder *encoder = &dsi_enc->encoder;
+ struct samsung_dsim *dsim = dev_get_drvdata(dev);
+ struct exynos_dsi *dsi = dsim->priv;
+ struct drm_encoder *encoder = &dsi->encoder;
struct drm_device *drm_dev = data;
int ret;
@@ -1797,17 +82,18 @@ static int exynos_dsi_bind(struct device *dev, struct device *master,
if (ret < 0)
return ret;
- return mipi_dsi_host_register(&dsi->dsi_host);
+ return mipi_dsi_host_register(&dsim->dsi_host);
}
-static void exynos_dsi_unbind(struct device *dev, struct device *master,
- void *data)
+static void exynos_dsi_unbind(struct device *dev, struct device *master, void *data)
{
- struct exynos_dsi *dsi = dev_get_drvdata(dev);
+ struct samsung_dsim *dsim = dev_get_drvdata(dev);
+
+ dsim->bridge.funcs->atomic_disable(&dsim->bridge, NULL);
- dsi->bridge.funcs->atomic_disable(&dsi->bridge, NULL);
+ dsim->bridge.funcs->atomic_disable(&dsim->bridge, NULL);
- mipi_dsi_host_unregister(&dsi->dsi_host);
+ mipi_dsi_host_unregister(&dsim->dsi_host);
}
static const struct component_ops exynos_dsi_component_ops = {
@@ -1815,258 +101,56 @@ static const struct component_ops exynos_dsi_component_ops = {
.unbind = exynos_dsi_unbind,
};
-static int exynos_dsi_register_host(struct exynos_dsi *dsim)
+static int exynos_dsi_register_host(struct samsung_dsim *dsim)
{
- struct exynos_dsi_enc *dsi_enc;
+ struct exynos_dsi *dsi;
- dsi_enc = devm_kzalloc(dsim->dev, sizeof(*dsi_enc), GFP_KERNEL);
- if (!dsi_enc)
+ dsi = devm_kzalloc(dsim->dev, sizeof(*dsi), GFP_KERNEL);
+ if (!dsi)
return -ENOMEM;
- dsim->priv = dsi_enc;
+ dsim->priv = dsi;
dsim->bridge.pre_enable_prev_first = true;
return component_add(dsim->dev, &exynos_dsi_component_ops);
}
-static void exynos_dsi_unregister_host(struct exynos_dsi *dsim)
+static void exynos_dsi_unregister_host(struct samsung_dsim *dsim)
{
component_del(dsim->dev, &exynos_dsi_component_ops);
}
-static int generic_dsim_register_host(struct exynos_dsi *dsim)
-{
- return mipi_dsi_host_register(&dsim->dsi_host);
-}
-
-static void generic_dsim_unregister_host(struct exynos_dsi *dsim)
-{
- mipi_dsi_host_unregister(&dsim->dsi_host);
-}
-
-static const struct exynos_dsim_host_ops generic_dsim_host_ops = {
- .register_host = generic_dsim_register_host,
- .unregister_host = generic_dsim_unregister_host,
-};
-
-static const struct drm_bridge_timings dsim_bridge_timings_de_low = {
- .input_bus_flags = DRM_BUS_FLAG_DE_LOW,
-};
-
-static int exynos_dsi_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct exynos_dsi *dsi;
- int ret, i;
-
- dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
- if (!dsi)
- return -ENOMEM;
-
- init_completion(&dsi->completed);
- spin_lock_init(&dsi->transfer_lock);
- INIT_LIST_HEAD(&dsi->transfer_list);
-
- dsi->dsi_host.ops = &exynos_dsi_ops;
- dsi->dsi_host.dev = dev;
-
- dsi->dev = dev;
- dsi->plat_data = of_device_get_match_data(dev);
- dsi->driver_data = exynos_dsi_types[dsi->plat_data->hw_type];
-
- dsi->supplies[0].supply = "vddcore";
- dsi->supplies[1].supply = "vddio";
- ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(dsi->supplies),
- dsi->supplies);
- if (ret)
- return dev_err_probe(dev, ret, "failed to get regulators\n");
-
- dsi->clks = devm_kcalloc(dev,
- dsi->driver_data->num_clks, sizeof(*dsi->clks),
- GFP_KERNEL);
- if (!dsi->clks)
- return -ENOMEM;
-
- for (i = 0; i < dsi->driver_data->num_clks; i++) {
- dsi->clks[i] = devm_clk_get(dev, clk_names[i]);
- if (IS_ERR(dsi->clks[i])) {
- if (strcmp(clk_names[i], "sclk_mipi") == 0) {
- dsi->clks[i] = devm_clk_get(dev,
- OLD_SCLK_MIPI_CLK_NAME);
- if (!IS_ERR(dsi->clks[i]))
- continue;
- }
-
- dev_info(dev, "failed to get the clock: %s\n",
- clk_names[i]);
- return PTR_ERR(dsi->clks[i]);
- }
- }
-
- dsi->reg_base = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(dsi->reg_base))
- return PTR_ERR(dsi->reg_base);
-
- dsi->phy = devm_phy_optional_get(dev, "dsim");
- if (IS_ERR(dsi->phy)) {
- dev_info(dev, "failed to get dsim phy\n");
- return PTR_ERR(dsi->phy);
- }
-
- dsi->irq = platform_get_irq(pdev, 0);
- if (dsi->irq < 0)
- return dsi->irq;
-
- ret = devm_request_threaded_irq(dev, dsi->irq, NULL,
- exynos_dsi_irq,
- IRQF_ONESHOT | IRQF_NO_AUTOEN,
- dev_name(dev), dsi);
- if (ret) {
- dev_err(dev, "failed to request dsi irq\n");
- return ret;
- }
-
- ret = exynos_dsi_parse_dt(dsi);
- if (ret)
- return ret;
-
- platform_set_drvdata(pdev, dsi);
-
- pm_runtime_enable(dev);
-
- dsi->bridge.funcs = &exynos_dsi_bridge_funcs;
- dsi->bridge.of_node = dev->of_node;
- dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
- dsi->bridge.pre_enable_prev_first = true;
-
- /* DE_LOW: i.MX8M Mini/Nano LCDIF-DSIM glue logic inverts HS/VS/DE */
- if (dsi->plat_data->hw_type == DSIM_TYPE_IMX8MM)
- dsi->bridge.timings = &dsim_bridge_timings_de_low;
-
- if (dsi->plat_data->host_ops && dsi->plat_data->host_ops->register_host)
- ret = dsi->plat_data->host_ops->register_host(dsi);
-
- if (ret)
- goto err_disable_runtime;
-
- return 0;
-
-err_disable_runtime:
- pm_runtime_disable(dev);
-
- return ret;
-}
-
-static int exynos_dsi_remove(struct platform_device *pdev)
-{
- pm_runtime_disable(&pdev->dev);
-
- component_del(&pdev->dev, &exynos_dsi_component_ops);
-
- return 0;
-}
-
-static int __maybe_unused exynos_dsi_suspend(struct device *dev)
-{
- struct exynos_dsi *dsi = dev_get_drvdata(dev);
- const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
- int ret, i;
-
- usleep_range(10000, 20000);
-
- if (dsi->state & DSIM_STATE_INITIALIZED) {
- dsi->state &= ~DSIM_STATE_INITIALIZED;
-
- exynos_dsi_disable_clock(dsi);
-
- exynos_dsi_disable_irq(dsi);
- }
-
- dsi->state &= ~DSIM_STATE_CMD_LPM;
-
- phy_power_off(dsi->phy);
-
- for (i = driver_data->num_clks - 1; i > -1; i--)
- clk_disable_unprepare(dsi->clks[i]);
-
- ret = regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
- if (ret < 0)
- dev_err(dsi->dev, "cannot disable regulators %d\n", ret);
-
- return 0;
-}
-
-static int __maybe_unused exynos_dsi_resume(struct device *dev)
-{
- struct exynos_dsi *dsi = dev_get_drvdata(dev);
- const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
- int ret, i;
-
- ret = regulator_bulk_enable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
- if (ret < 0) {
- dev_err(dsi->dev, "cannot enable regulators %d\n", ret);
- return ret;
- }
-
- for (i = 0; i < driver_data->num_clks; i++) {
- ret = clk_prepare_enable(dsi->clks[i]);
- if (ret < 0)
- goto err_clk;
- }
-
- ret = phy_power_on(dsi->phy);
- if (ret < 0) {
- dev_err(dsi->dev, "cannot enable phy %d\n", ret);
- goto err_clk;
- }
-
- return 0;
-
-err_clk:
- while (--i > -1)
- clk_disable_unprepare(dsi->clks[i]);
- regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
-
- return ret;
-}
-
-static const struct dev_pm_ops exynos_dsi_pm_ops = {
- SET_RUNTIME_PM_OPS(exynos_dsi_suspend, exynos_dsi_resume, NULL)
- SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
- pm_runtime_force_resume)
-};
-
-static const struct exynos_dsim_host_ops exynos_dsi_host_ops = {
+static const struct samsung_dsim_host_ops exynos_dsi_exynos_host_ops = {
.register_host = exynos_dsi_register_host,
.unregister_host = exynos_dsi_unregister_host,
- .attach = _exynos_dsi_host_attach,
- .detach = _exynos_dsi_host_detach,
- .te_irq_handler = _exynos_dsi_te_irq_handler,
+ .attach = exynos_dsi_host_attach,
+ .detach = exynos_dsi_host_detach,
+ .te_irq_handler = exynos_dsi_te_irq_handler,
};
-static const struct exynos_dsi_plat_data exynos3250_dsi_pdata = {
+static const struct samsung_dsim_plat_data exynos3250_dsi_pdata = {
.hw_type = DSIM_TYPE_EXYNOS3250,
- .host_ops = &exynos_dsi_host_ops,
+ .host_ops = &exynos_dsi_exynos_host_ops,
};
-static const struct exynos_dsi_plat_data exynos4210_dsi_pdata = {
+static const struct samsung_dsim_plat_data exynos4210_dsi_pdata = {
.hw_type = DSIM_TYPE_EXYNOS4210,
- .host_ops = &exynos_dsi_host_ops,
+ .host_ops = &exynos_dsi_exynos_host_ops,
};
-static const struct exynos_dsi_plat_data exynos5410_dsi_pdata = {
+static const struct samsung_dsim_plat_data exynos5410_dsi_pdata = {
.hw_type = DSIM_TYPE_EXYNOS5410,
- .host_ops = &exynos_dsi_host_ops,
+ .host_ops = &exynos_dsi_exynos_host_ops,
};
-static const struct exynos_dsi_plat_data exynos5422_dsi_pdata = {
+static const struct samsung_dsim_plat_data exynos5422_dsi_pdata = {
.hw_type = DSIM_TYPE_EXYNOS5422,
- .host_ops = &exynos_dsi_host_ops,
+ .host_ops = &exynos_dsi_exynos_host_ops,
};
-static const struct exynos_dsi_plat_data exynos5433_dsi_pdata = {
+static const struct samsung_dsim_plat_data exynos5433_dsi_pdata = {
.hw_type = DSIM_TYPE_EXYNOS5433,
- .host_ops = &exynos_dsi_host_ops,
+ .host_ops = &exynos_dsi_exynos_host_ops,
};
static const struct of_device_id exynos_dsi_of_match[] = {
@@ -2095,12 +179,12 @@ static const struct of_device_id exynos_dsi_of_match[] = {
MODULE_DEVICE_TABLE(of, exynos_dsi_of_match);
struct platform_driver dsi_driver = {
- .probe = exynos_dsi_probe,
- .remove = exynos_dsi_remove,
+ .probe = samsung_dsim_probe,
+ .remove = samsung_dsim_remove,
.driver = {
.name = "exynos-dsi",
.owner = THIS_MODULE,
- .pm = &exynos_dsi_pm_ops,
+ .pm = &samsung_dsim_pm_ops,
.of_match_table = exynos_dsi_of_match,
},
};
new file mode 100644
@@ -0,0 +1,114 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2022 Amarula Solutions(India)
+ * Author: Jagan Teki <jagan@amarulasolutions.com>
+ */
+
+#ifndef __SAMSUNG_DSIM__
+#define __SAMSUNG_DSIM__
+
+#include <linux/gpio/consumer.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_mipi_dsi.h>
+
+struct samsung_dsim;
+
+#define DSIM_STATE_ENABLED BIT(0)
+#define DSIM_STATE_INITIALIZED BIT(1)
+#define DSIM_STATE_CMD_LPM BIT(2)
+#define DSIM_STATE_VIDOUT_AVAILABLE BIT(3)
+
+enum samsung_dsim_type {
+ DSIM_TYPE_EXYNOS3250,
+ DSIM_TYPE_EXYNOS4210,
+ DSIM_TYPE_EXYNOS5410,
+ DSIM_TYPE_EXYNOS5422,
+ DSIM_TYPE_EXYNOS5433,
+ DSIM_TYPE_IMX8MM,
+ DSIM_TYPE_COUNT,
+};
+
+#define samsung_dsim_hw_is_exynos(hw) \
+ ((hw) >= DSIM_TYPE_EXYNOS3250 && (hw) <= DSIM_TYPE_EXYNOS5433)
+
+struct samsung_dsim_transfer {
+ struct list_head list;
+ struct completion completed;
+ int result;
+ struct mipi_dsi_packet packet;
+ u16 flags;
+ u16 tx_done;
+
+ u8 *rx_payload;
+ u16 rx_len;
+ u16 rx_done;
+};
+
+struct samsung_dsim_driver_data {
+ const unsigned int *reg_ofs;
+ unsigned int plltmr_reg;
+ unsigned int has_freqband:1;
+ unsigned int has_clklane_stop:1;
+ unsigned int num_clks;
+ unsigned int max_freq;
+ unsigned int wait_for_reset;
+ unsigned int num_bits_resol;
+ unsigned int pll_p_offset;
+ const unsigned int *reg_values;
+};
+
+struct samsung_dsim_host_ops {
+ int (*register_host)(struct samsung_dsim *dsim);
+ void (*unregister_host)(struct samsung_dsim *dsim);
+ void (*attach)(struct samsung_dsim *dsim, struct mipi_dsi_device *device);
+ void (*detach)(struct samsung_dsim *dsim, struct mipi_dsi_device *device);
+ irqreturn_t (*te_irq_handler)(struct samsung_dsim *dsim);
+};
+
+struct samsung_dsim_plat_data {
+ enum samsung_dsim_type hw_type;
+ const struct samsung_dsim_host_ops *host_ops;
+};
+
+struct samsung_dsim {
+ struct mipi_dsi_host dsi_host;
+ struct drm_bridge bridge;
+ struct drm_bridge *out_bridge;
+ struct device *dev;
+ struct drm_display_mode mode;
+
+ void __iomem *reg_base;
+ struct phy *phy;
+ struct clk **clks;
+ struct regulator_bulk_data supplies[2];
+ int irq;
+ struct gpio_desc *te_gpio;
+
+ u32 pll_clk_rate;
+ u32 burst_clk_rate;
+ u32 esc_clk_rate;
+ u32 lanes;
+ u32 mode_flags;
+ u32 format;
+
+ int state;
+ struct drm_property *brightness;
+ struct completion completed;
+
+ spinlock_t transfer_lock; /* protects transfer_list */
+ struct list_head transfer_list;
+
+ const struct samsung_dsim_driver_data *driver_data;
+ const struct samsung_dsim_plat_data *plat_data;
+
+ void *priv;
+};
+
+extern int samsung_dsim_probe(struct platform_device *pdev);
+extern int samsung_dsim_remove(struct platform_device *pdev);
+extern const struct dev_pm_ops samsung_dsim_pm_ops;
+
+#endif /* __SAMSUNG_DSIM__ */