diff mbox series

[1/2] drm/panel: simple: Add FriendlyELEC HD702E 800x1280 LCD panel

Message ID 20190501121448.3812-1-jagan@amarulasolutions.com
State New
Headers
Series [1/2] drm/panel: simple: Add FriendlyELEC HD702E 800x1280 LCD panel |

Commit Message

Jagan Teki May 1, 2019, 12:14 p.m. UTC 
HD702E lcd is FriendlyELEC developed eDP LCD panel with 800x1280
resolution. It has built in Goodix, GT9271 captive touchscreen
with backlight adjustable via PWM.

Add support for it.

Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
 .../display/panel/friendlyarm,hd702e.txt      | 29 +++++++++++++++++++
 drivers/gpu/drm/panel/panel-simple.c          | 26 +++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt

Comments

Sam Ravnborg May 1, 2019, 7:34 p.m. UTC | #1 
Hi Jagan

On Wed, May 01, 2019 at 05:44:47PM +0530, Jagan Teki wrote:
> HD702E lcd is FriendlyELEC developed eDP LCD panel with 800x1280
> resolution. It has built in Goodix, GT9271 captive touchscreen
> with backlight adjustable via PWM.
> 
> Add support for it.
> 
> Cc: Thierry Reding <thierry.reding@gmail.com>
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: dri-devel@lists.freedesktop.org
> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

Please submit the binding in a separate patch as per
Documentation/devicetree/bindings/submitting-patches.txt

The binding looks like it is compatible with common-panel and
simple-panel - please say so in the bindings.
See for example the last few binding documents added to the kernel tree.

> ---
>  .../display/panel/friendlyarm,hd702e.txt      | 29 +++++++++++++++++++
>  drivers/gpu/drm/panel/panel-simple.c          | 26 +++++++++++++++++
>  2 files changed, 55 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt b/Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt
> new file mode 100644
> index 000000000000..67349d7f79be
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt
> @@ -0,0 +1,29 @@
> +FriendlyELEC HD702E 800x1280 LCD panel
> +
> +HD702E lcd is FriendlyELEC developed eDP LCD panel with 800x1280
> +resolution. It has built in Goodix, GT9271 captive touchscreen
> +with backlight adjustable via PWM.
> +
> +Required properties:
> +- compatible: should be "friendlyarm,hd702e"
> +- power-supply: regulator to provide the supply voltage
> +
> +Optional properties:
> +- backlight: phandle of the backlight device attached to the panel
> +
> +Optional nodes:
> +- Video port for LCD panel input.
> +
> +Example:
> +
> +	panel {
> +		compatible ="friendlyarm,hd702e";
> +		backlight = <&backlight>;
> +		power-supply = <&vcc3v3_sys>;
> +
> +		port {
> +			panel_in_edp: endpoint {
> +				remote-endpoint = <&edp_out_panel>;
> +			};
> +		};
> +	};
> diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> index 9e8218f6a3f2..9db3c0c65ef2 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -1184,6 +1184,29 @@ static const struct panel_desc foxlink_fl500wvr00_a0t = {
>  	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
>  };
>  
> +static const struct drm_display_mode friendlyarm_hd702e_mode = {
> +	.clock		= 67185,
> +	.hdisplay	= 800,
> +	.hsync_start	= 800 + 20,
> +	.hsync_end	= 800 + 20 + 24,
> +	.htotal		= 800 + 20 + 24 + 20,
> +	.vdisplay	= 1280,
> +	.vsync_start	= 1280 + 4,
> +	.vsync_end	= 1280 + 4 + 8,
> +	.vtotal		= 1280 + 4 + 8 + 4,
> +	.vrefresh	= 60,
> +	.flags 		= DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
> +};
> +
> +static const struct panel_desc friendlyarm_hd702e = {
> +	.modes = &friendlyarm_hd702e_mode,
> +	.num_modes = 1,
> +	.size = {
> +		.width	= 94,
> +		.height	= 151,
> +	},
> +};
As I read the datasheet then this panel needs at least a prepare delay
of 10 ms (it says > 10 ms from VGH until Data).
And then we also know that VGH shall be valid at least 10 ms after DVDD
so prepare is likely 20 ms.

Based on datasheet found here:
https://pan.baidu.com/s/1geEfBLh/

Please evaluate all delays.

> +
>  static const struct drm_display_mode giantplus_gpg482739qs5_mode = {
>  	.clock = 9000,
>  	.hdisplay = 480,
> @@ -2634,6 +2657,9 @@ static const struct of_device_id platform_of_match[] = {
>  	}, {
>  		.compatible = "edt,etm0700g0edh6",
>  		.data = &edt_etm0700g0bdh6,
> +	}, {
> +		.compatible = "friendlyarm,hd702e",
> +		.data = &friendlyarm_hd702e,
>  	}, {
>  		.compatible = "foxlink,fl500wvr00-a0t",
>  		.data = &foxlink_fl500wvr00_a0t,

Add these in sorted order.
"fox" is before "fri"

	Sam
Rob Herring May 2, 2019, 9:36 p.m. UTC | #2 
On Wed,  1 May 2019 17:44:47 +0530, Jagan Teki wrote:
> HD702E lcd is FriendlyELEC developed eDP LCD panel with 800x1280
> resolution. It has built in Goodix, GT9271 captive touchscreen
> with backlight adjustable via PWM.
> 
> Add support for it.
> 
> Cc: Thierry Reding <thierry.reding@gmail.com>
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: dri-devel@lists.freedesktop.org
> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
> ---
>  .../display/panel/friendlyarm,hd702e.txt      | 29 +++++++++++++++++++
>  drivers/gpu/drm/panel/panel-simple.c          | 26 +++++++++++++++++
>  2 files changed, 55 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt
> 

Reviewed-by: Rob Herring <robh@kernel.org>
Jagan Teki May 6, 2019, 9:56 a.m. UTC | #3 
Hi Sam,

On Thu, May 2, 2019 at 1:04 AM Sam Ravnborg <sam@ravnborg.org> wrote:
>
> Hi Jagan
>
> On Wed, May 01, 2019 at 05:44:47PM +0530, Jagan Teki wrote:
> > HD702E lcd is FriendlyELEC developed eDP LCD panel with 800x1280
> > resolution. It has built in Goodix, GT9271 captive touchscreen
> > with backlight adjustable via PWM.
> >
> > Add support for it.
> >
> > Cc: Thierry Reding <thierry.reding@gmail.com>
> > Cc: Sam Ravnborg <sam@ravnborg.org>
> > Cc: David Airlie <airlied@linux.ie>
> > Cc: Daniel Vetter <daniel@ffwll.ch>
> > Cc: dri-devel@lists.freedesktop.org
> > Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
>
> Please submit the binding in a separate patch as per
> Documentation/devicetree/bindings/submitting-patches.txt

Hmm.. prepared like this initially but few of my patches were combined
earlier even-though I sent it separately. anyway let me separate it
again.

>
> The binding looks like it is compatible with common-panel and
> simple-panel - please say so in the bindings.
> See for example the last few binding documents added to the kernel tree.

Correct, will update.

>
> > ---
> >  .../display/panel/friendlyarm,hd702e.txt      | 29 +++++++++++++++++++
> >  drivers/gpu/drm/panel/panel-simple.c          | 26 +++++++++++++++++
> >  2 files changed, 55 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt
> >
> > diff --git a/Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt b/Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt
> > new file mode 100644
> > index 000000000000..67349d7f79be
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt
> > @@ -0,0 +1,29 @@
> > +FriendlyELEC HD702E 800x1280 LCD panel
> > +
> > +HD702E lcd is FriendlyELEC developed eDP LCD panel with 800x1280
> > +resolution. It has built in Goodix, GT9271 captive touchscreen
> > +with backlight adjustable via PWM.
> > +
> > +Required properties:
> > +- compatible: should be "friendlyarm,hd702e"
> > +- power-supply: regulator to provide the supply voltage
> > +
> > +Optional properties:
> > +- backlight: phandle of the backlight device attached to the panel
> > +
> > +Optional nodes:
> > +- Video port for LCD panel input.
> > +
> > +Example:
> > +
> > +     panel {
> > +             compatible ="friendlyarm,hd702e";
> > +             backlight = <&backlight>;
> > +             power-supply = <&vcc3v3_sys>;
> > +
> > +             port {
> > +                     panel_in_edp: endpoint {
> > +                             remote-endpoint = <&edp_out_panel>;
> > +                     };
> > +             };
> > +     };
> > diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> > index 9e8218f6a3f2..9db3c0c65ef2 100644
> > --- a/drivers/gpu/drm/panel/panel-simple.c
> > +++ b/drivers/gpu/drm/panel/panel-simple.c
> > @@ -1184,6 +1184,29 @@ static const struct panel_desc foxlink_fl500wvr00_a0t = {
> >       .bus_format = MEDIA_BUS_FMT_RGB888_1X24,
> >  };
> >
> > +static const struct drm_display_mode friendlyarm_hd702e_mode = {
> > +     .clock          = 67185,
> > +     .hdisplay       = 800,
> > +     .hsync_start    = 800 + 20,
> > +     .hsync_end      = 800 + 20 + 24,
> > +     .htotal         = 800 + 20 + 24 + 20,
> > +     .vdisplay       = 1280,
> > +     .vsync_start    = 1280 + 4,
> > +     .vsync_end      = 1280 + 4 + 8,
> > +     .vtotal         = 1280 + 4 + 8 + 4,
> > +     .vrefresh       = 60,
> > +     .flags          = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
> > +};
> > +
> > +static const struct panel_desc friendlyarm_hd702e = {
> > +     .modes = &friendlyarm_hd702e_mode,
> > +     .num_modes = 1,
> > +     .size = {
> > +             .width  = 94,
> > +             .height = 151,
> > +     },
> > +};
> As I read the datasheet then this panel needs at least a prepare delay
> of 10 ms (it says > 10 ms from VGH until Data).
> And then we also know that VGH shall be valid at least 10 ms after DVDD
> so prepare is likely 20 ms.
>
> Based on datasheet found here:
> https://pan.baidu.com/s/1geEfBLh/
>
> Please evaluate all delays.

This part I'm unclear, I tried to get the datasheet of this but
couldn't find it either. I have a reference for these FriendlyELEC
panels from https://github.com/friendlyarm/kernel-rockchip/blob/nanopi4-linux-v4.4.y/drivers/gpu/drm/panel/panel-friendlyelec.c
but they are not using any of these delays.

>
> > +
> >  static const struct drm_display_mode giantplus_gpg482739qs5_mode = {
> >       .clock = 9000,
> >       .hdisplay = 480,
> > @@ -2634,6 +2657,9 @@ static const struct of_device_id platform_of_match[] = {
> >       }, {
> >               .compatible = "edt,etm0700g0edh6",
> >               .data = &edt_etm0700g0bdh6,
> > +     }, {
> > +             .compatible = "friendlyarm,hd702e",
> > +             .data = &friendlyarm_hd702e,
> >       }, {
> >               .compatible = "foxlink,fl500wvr00-a0t",
> >               .data = &foxlink_fl500wvr00_a0t,
>
> Add these in sorted order.
> "fox" is before "fri"

True, will sort it.
Rob Herring May 6, 2019, 3:04 p.m. UTC | #4 
On Mon, May 6, 2019 at 4:56 AM Jagan Teki <jagan@amarulasolutions.com> wrote:
>
> Hi Sam,
>
> On Thu, May 2, 2019 at 1:04 AM Sam Ravnborg <sam@ravnborg.org> wrote:
> >
> > Hi Jagan
> >
> > On Wed, May 01, 2019 at 05:44:47PM +0530, Jagan Teki wrote:
> > > HD702E lcd is FriendlyELEC developed eDP LCD panel with 800x1280
> > > resolution. It has built in Goodix, GT9271 captive touchscreen
> > > with backlight adjustable via PWM.
> > >
> > > Add support for it.
> > >
> > > Cc: Thierry Reding <thierry.reding@gmail.com>
> > > Cc: Sam Ravnborg <sam@ravnborg.org>
> > > Cc: David Airlie <airlied@linux.ie>
> > > Cc: Daniel Vetter <daniel@ffwll.ch>
> > > Cc: dri-devel@lists.freedesktop.org
> > > Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
> >
> > Please submit the binding in a separate patch as per
> > Documentation/devicetree/bindings/submitting-patches.txt
>
> Hmm.. prepared like this initially but few of my patches were combined
> earlier even-though I sent it separately. anyway let me separate it
> again.

For what subsystem? All the maintainers that I was aware of doing that
have stopped.

Rob
Jagan Teki May 7, 2019, 1:10 p.m. UTC | #5 
On Mon, May 6, 2019 at 8:34 PM Rob Herring <robh+dt@kernel.org> wrote:
>
> On Mon, May 6, 2019 at 4:56 AM Jagan Teki <jagan@amarulasolutions.com> wrote:
> >
> > Hi Sam,
> >
> > On Thu, May 2, 2019 at 1:04 AM Sam Ravnborg <sam@ravnborg.org> wrote:
> > >
> > > Hi Jagan
> > >
> > > On Wed, May 01, 2019 at 05:44:47PM +0530, Jagan Teki wrote:
> > > > HD702E lcd is FriendlyELEC developed eDP LCD panel with 800x1280
> > > > resolution. It has built in Goodix, GT9271 captive touchscreen
> > > > with backlight adjustable via PWM.
> > > >
> > > > Add support for it.
> > > >
> > > > Cc: Thierry Reding <thierry.reding@gmail.com>
> > > > Cc: Sam Ravnborg <sam@ravnborg.org>
> > > > Cc: David Airlie <airlied@linux.ie>
> > > > Cc: Daniel Vetter <daniel@ffwll.ch>
> > > > Cc: dri-devel@lists.freedesktop.org
> > > > Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
> > >
> > > Please submit the binding in a separate patch as per
> > > Documentation/devicetree/bindings/submitting-patches.txt
> >
> > Hmm.. prepared like this initially but few of my patches were combined
> > earlier even-though I sent it separately. anyway let me separate it
> > again.
>
> For what subsystem? All the maintainers that I was aware of doing that
> have stopped.

May be it was recent, Dmitry combined by previous dt and driver changes.

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=ae97fb589648cd5558f1ceea317404a639307501
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a5f50c501321249d67611353dde6d68d48c5b959
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt b/Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt
new file mode 100644
index 000000000000..67349d7f79be
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/friendlyarm,hd702e.txt
@@ -0,0 +1,29 @@ 
+FriendlyELEC HD702E 800x1280 LCD panel
+
+HD702E lcd is FriendlyELEC developed eDP LCD panel with 800x1280
+resolution. It has built in Goodix, GT9271 captive touchscreen
+with backlight adjustable via PWM.
+
+Required properties:
+- compatible: should be "friendlyarm,hd702e"
+- power-supply: regulator to provide the supply voltage
+
+Optional properties:
+- backlight: phandle of the backlight device attached to the panel
+
+Optional nodes:
+- Video port for LCD panel input.
+
+Example:
+
+	panel {
+		compatible ="friendlyarm,hd702e";
+		backlight = <&backlight>;
+		power-supply = <&vcc3v3_sys>;
+
+		port {
+			panel_in_edp: endpoint {
+				remote-endpoint = <&edp_out_panel>;
+			};
+		};
+	};
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 9e8218f6a3f2..9db3c0c65ef2 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -1184,6 +1184,29 @@  static const struct panel_desc foxlink_fl500wvr00_a0t = {
 	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
 };
 
+static const struct drm_display_mode friendlyarm_hd702e_mode = {
+	.clock		= 67185,
+	.hdisplay	= 800,
+	.hsync_start	= 800 + 20,
+	.hsync_end	= 800 + 20 + 24,
+	.htotal		= 800 + 20 + 24 + 20,
+	.vdisplay	= 1280,
+	.vsync_start	= 1280 + 4,
+	.vsync_end	= 1280 + 4 + 8,
+	.vtotal		= 1280 + 4 + 8 + 4,
+	.vrefresh	= 60,
+	.flags 		= DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
+};
+
+static const struct panel_desc friendlyarm_hd702e = {
+	.modes = &friendlyarm_hd702e_mode,
+	.num_modes = 1,
+	.size = {
+		.width	= 94,
+		.height	= 151,
+	},
+};
+
 static const struct drm_display_mode giantplus_gpg482739qs5_mode = {
 	.clock = 9000,
 	.hdisplay = 480,
@@ -2634,6 +2657,9 @@  static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "edt,etm0700g0edh6",
 		.data = &edt_etm0700g0bdh6,
+	}, {
+		.compatible = "friendlyarm,hd702e",
+		.data = &friendlyarm_hd702e,
 	}, {
 		.compatible = "foxlink,fl500wvr00-a0t",
 		.data = &foxlink_fl500wvr00_a0t,