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[209.85.220.65]) by mx.google.com with SMTPS id d13sor2919369pga.42.2019.03.15.06.09.02 for (Google Transport Security); Fri, 15 Mar 2019 06:09:02 -0700 (PDT) Received-SPF: pass (google.com: domain of jagan@amarulasolutions.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; X-Received: by 2002:a63:e40b:: with SMTP id a11mr3347314pgi.259.1552655341691; Fri, 15 Mar 2019 06:09:01 -0700 (PDT) Received: from localhost.localdomain ([183.82.230.185]) by smtp.gmail.com with ESMTPSA id e2sm854008pfa.64.2019.03.15.06.08.57 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 15 Mar 2019 06:09:01 -0700 (PDT) From: Jagan Teki To: Andrzej Hajda , Laurent Pinchart , Chen-Yu Tsai , Maxime Ripard , David Airlie , Daniel Vetter , Rob Herring , Mark Rutland Cc: Michael Trimarchi , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@googlegroups.com, linux-amarula@amarulasolutions.com, Jagan Teki Subject: [PATCH 5/6] drm/bridge: Add Chipone ICN6211 MIPI-DSI/RGB convertor bridge Date: Fri, 15 Mar 2019 18:38:24 +0530 Message-Id: <20190315130825.9005-6-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.18.0.321.gffc6fa0e3 In-Reply-To: <20190315130825.9005-1-jagan@amarulasolutions.com> References: <20190315130825.9005-1-jagan@amarulasolutions.com> MIME-Version: 1.0 X-Original-Sender: jagan@amarulasolutions.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@amarulasolutions.com header.s=google header.b=dD9jLFn+; spf=pass (google.com: domain of jagan@amarulasolutions.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=jagan@amarulasolutions.com Content-Type: text/plain; charset="UTF-8" Precedence: list Mailing-list: list linux-amarula@amarulasolutions.com; contact linux-amarula+owners@amarulasolutions.com List-ID: X-Spam-Checked-In-Group: linux-amarula@amarulasolutions.com X-Google-Group-Id: 476853432473 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , ICN6211 is MIPI-DSI/RGB converter bridge from chipone. It has a flexible configuration of MIPI DSI signal input and produce RGB565, RGB666, RGB888 output format. Add bridge driver for it. Signed-off-by: Jagan Teki --- MAINTAINERS | 6 + drivers/gpu/drm/bridge/Kconfig | 10 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/chipone-icn6211.c | 275 +++++++++++++++++++++++ 4 files changed, 292 insertions(+) create mode 100644 drivers/gpu/drm/bridge/chipone-icn6211.c diff --git a/MAINTAINERS b/MAINTAINERS index 4de80222cffb..e529addd30f5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4897,6 +4897,12 @@ T: git git://anongit.freedesktop.org/drm/drm-misc S: Maintained F: drivers/gpu/drm/bochs/ +DRM DRIVER FOR CHIPONE ICN6211 MIPI-DSI to RGB CONVERTOR BRIDGE +M: Jagan Teki +S: Maintained +F: drivers/gpu/drm/bridge/chipone-icn6211.c +F: Documentation/devicetree/bindings/display/bridge/chipone,icn6211.txt + DRM DRIVER FOR FARADAY TVE200 TV ENCODER M: Linus Walleij T: git git://anongit.freedesktop.org/drm/drm-misc diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 8840f396a7b6..cd314572e4ed 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -36,6 +36,16 @@ config DRM_CDNS_DSI Support Cadence DPI to DSI bridge. This is an internal bridge and is meant to be directly embedded in a SoC. +config DRM_CHIPONE_ICN6211 + tristate "Chipone ICN6211 MIPI-DSI/RGB converter bridge" + depends on DRM && DRM_PANEL + depends on OF + select DRM_MIPI_DSI + help + ICN6211 is MIPI-DSI/RGB converter bridge from chipone. + It has a flexible configuration of MIPI DSI signal input + and produce RGB565, RGB666, RGB888 output format. + config DRM_DUMB_VGA_DAC tristate "Dumb VGA DAC Bridge support" depends on OF diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index 4934fcf5a6f8..541fdccad10b 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o obj-$(CONFIG_DRM_CDNS_DSI) += cdns-dsi.o +obj-$(CONFIG_DRM_CHIPONE_ICN6211) += chipone-icn6211.o obj-$(CONFIG_DRM_DUMB_VGA_DAC) += dumb-vga-dac.o obj-$(CONFIG_DRM_LVDS_ENCODER) += lvds-encoder.o obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o diff --git a/drivers/gpu/drm/bridge/chipone-icn6211.c b/drivers/gpu/drm/bridge/chipone-icn6211.c new file mode 100644 index 000000000000..cd2f3505f845 --- /dev/null +++ b/drivers/gpu/drm/bridge/chipone-icn6211.c @@ -0,0 +1,275 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018 Amarula Solutions + * Author: Jagan Teki + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#define ICN6211_INIT_CMD_LEN 2 + +struct chipone { + struct device *dev; + struct drm_bridge bridge; + struct drm_connector connector; + struct drm_panel *panel; + + struct gpio_desc *reset; +}; + +static inline struct chipone *bridge_to_chipone(struct drm_bridge *bridge) +{ + return container_of(bridge, struct chipone, bridge); +} + +static inline +struct chipone *connector_to_chipone(struct drm_connector *connector) +{ + return container_of(connector, struct chipone, connector); +} + +struct icn6211_init_cmd { + u8 data[ICN6211_INIT_CMD_LEN]; +}; + +static const struct icn6211_init_cmd icn6211_init_cmds[] = { + { .data = { 0x7A, 0xC1 } }, + { .data = { 0x20, 0x20 } }, + { .data = { 0x21, 0xE0 } }, + { .data = { 0x22, 0x13 } }, + { .data = { 0x23, 0x28 } }, + { .data = { 0x24, 0x30 } }, + { .data = { 0x25, 0x28 } }, + { .data = { 0x26, 0x00 } }, + { .data = { 0x27, 0x0D } }, + { .data = { 0x28, 0x03 } }, + { .data = { 0x29, 0x1D } }, + { .data = { 0x34, 0x80 } }, + { .data = { 0x36, 0x28 } }, + { .data = { 0xB5, 0xA0 } }, + { .data = { 0x5C, 0xFF } }, + { .data = { 0x2A, 0x01 } }, + { .data = { 0x56, 0x92 } }, + { .data = { 0x6B, 0x71 } }, + { .data = { 0x69, 0x2B } }, + { .data = { 0x10, 0x40 } }, + { .data = { 0x11, 0x98 } }, + { .data = { 0xB6, 0x20 } }, + { .data = { 0x51, 0x20 } }, + { .data = { 0x09, 0x10 } }, +}; + +static int chipone_get_modes(struct drm_connector *connector) +{ + struct chipone *icn = connector_to_chipone(connector); + + return drm_panel_get_modes(icn->panel); +} + +static const +struct drm_connector_helper_funcs chipone_connector_helper_funcs = { + .get_modes = chipone_get_modes, +}; + +static const struct drm_connector_funcs chipone_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static void chipone_disable(struct drm_bridge *bridge) +{ + struct chipone *icn = bridge_to_chipone(bridge); + int ret = drm_panel_disable(bridge_to_chipone(bridge)->panel); + + if (ret < 0) + DRM_DEV_ERROR(icn->dev, "error disabling panel (%d)\n", ret); +} + +static void chipone_post_disable(struct drm_bridge *bridge) +{ + struct chipone *icn = bridge_to_chipone(bridge); + int ret; + + ret = drm_panel_unprepare(icn->panel); + if (ret < 0) + DRM_DEV_ERROR(icn->dev, "error unpreparing panel (%d)\n", ret); + + msleep(50); + + gpiod_set_value(icn->reset, 0); +} + +static void chipone_pre_enable(struct drm_bridge *bridge) +{ + struct chipone *icn = bridge_to_chipone(bridge); + struct mipi_dsi_device *dsi = to_mipi_dsi_device(icn->dev); + unsigned int i; + int ret; + + gpiod_set_value(icn->reset, 0); + msleep(20); + + gpiod_set_value(icn->reset, 1); + msleep(50); + + for (i = 0; i < ARRAY_SIZE(icn6211_init_cmds); i++) { + const struct icn6211_init_cmd *cmd = &icn6211_init_cmds[i]; + + ret = mipi_dsi_generic_write(dsi, cmd->data, + ICN6211_INIT_CMD_LEN); + if (ret < 0) { + DRM_DEV_ERROR(icn->dev, + "failed to write cmd %d: %d\n", i, ret); + return; + } + } + + ret = drm_panel_prepare(icn->panel); + if (ret < 0) + DRM_DEV_ERROR(icn->dev, "error preparing panel (%d)\n", ret); +} + +static void chipone_enable(struct drm_bridge *bridge) +{ + struct chipone *icn = bridge_to_chipone(bridge); + int ret = drm_panel_enable(icn->panel); + + if (ret < 0) + DRM_DEV_ERROR(icn->dev, "error enabling panel (%d)\n", ret); +} + +static int chipone_attach(struct drm_bridge *bridge) +{ + struct chipone *icn = bridge_to_chipone(bridge); + struct drm_device *drm = bridge->dev; + int ret; + + icn->connector.polled = DRM_CONNECTOR_POLL_HPD; + ret = drm_connector_init(drm, &icn->connector, + &chipone_connector_funcs, + DRM_MODE_CONNECTOR_Unknown); + if (ret) { + DRM_ERROR("Failed to initialize connector\n"); + return ret; + } + + drm_connector_helper_add(&icn->connector, + &chipone_connector_helper_funcs); + drm_connector_attach_encoder(&icn->connector, bridge->encoder); + drm_panel_attach(icn->panel, &icn->connector); + icn->connector.funcs->reset(&icn->connector); + drm_fb_helper_add_one_connector(drm->fb_helper, &icn->connector); + drm_connector_register(&icn->connector); + + return 0; +} + +static void chipone_detach(struct drm_bridge *bridge) +{ + struct chipone *icn = bridge_to_chipone(bridge); + struct drm_device *drm = bridge->dev; + + drm_connector_unregister(&icn->connector); + drm_fb_helper_remove_one_connector(drm->fb_helper, &icn->connector); + drm_panel_detach(icn->panel); + icn->panel = NULL; + drm_connector_put(&icn->connector); +} + +static const struct drm_bridge_funcs chipone_bridge_funcs = { + .disable = chipone_disable, + .post_disable = chipone_post_disable, + .enable = chipone_enable, + .pre_enable = chipone_pre_enable, + .attach = chipone_attach, + .detach = chipone_detach, +}; + +static int chipone_probe(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + struct chipone *icn; + int ret; + + icn = devm_kzalloc(dev, sizeof(struct chipone), GFP_KERNEL); + if (!icn) + return -ENOMEM; + + mipi_dsi_set_drvdata(dsi, icn); + + icn->dev = dev; + dsi->lanes = 4; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE; + + icn->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(icn->reset)) { + DRM_DEV_ERROR(dev, "no reset GPIO pin provided\n"); + return PTR_ERR(icn->reset); + } + + ret = drm_of_find_panel_or_bridge(icn->dev->of_node, 1, 0, + &icn->panel, NULL); + if (ret && ret != -EPROBE_DEFER) { + DRM_DEV_ERROR(dev, "failed to find panel (ret = %d)\n", ret); + return ret; + } + + icn->bridge.funcs = &chipone_bridge_funcs; + icn->bridge.of_node = dev->of_node; + + drm_bridge_add(&icn->bridge); + + ret = mipi_dsi_attach(dsi); + if (ret < 0) { + drm_bridge_remove(&icn->bridge); + DRM_DEV_ERROR(dev, "failed to attach dsi (ret = %d)\n", ret); + } + + return ret; +} + +static int chipone_remove(struct mipi_dsi_device *dsi) +{ + struct chipone *icn = mipi_dsi_get_drvdata(dsi); + + mipi_dsi_detach(dsi); + drm_bridge_remove(&icn->bridge); + + return 0; +} + +static const struct of_device_id chipone_of_match[] = { + { .compatible = "bananapi,icn6211" }, + { } +}; +MODULE_DEVICE_TABLE(of, chipone_of_match); + +static struct mipi_dsi_driver chipone_driver = { + .probe = chipone_probe, + .remove = chipone_remove, + .driver = { + .name = "chipone-icn6211", + .owner = THIS_MODULE, + .of_match_table = chipone_of_match, + }, +}; +module_mipi_dsi_driver(chipone_driver); + +MODULE_AUTHOR("Jagan Teki "); +MODULE_DESCRIPTION("Chipone ICN6211 MIPI-DSI to RGB Convertor Bridge"); +MODULE_LICENSE("GPL v2");