[PATCH RFC 18/19] drm/panel: simple: Add support for Toshiba LTA089AC29000 panel

[Laurent Pinchart]

Hi Boris,

Thank you for the patch.

On Thu, Aug 08, 2019 at 05:11:49PM +0200, Boris Brezillon wrote:
> Add a new entry for the Toshiba LTA089AC29000 panel.
> 
> Signed-off-by: Boris Brezillon <boris.brezillon at collabora.com>
> ---
>  .../display/panel/toshiba,lt089ac29000.txt    |  5 ++-
>  drivers/gpu/drm/panel/panel-simple.c          | 36 +++++++++++++++++++
>  2 files changed, 40 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/toshiba,lt089ac29000.txt b/Documentation/devicetree/bindings/display/panel/toshiba,lt089ac29000.txt
> index 89826116628c..26ebfa098966 100644
> --- a/Documentation/devicetree/bindings/display/panel/toshiba,lt089ac29000.txt
> +++ b/Documentation/devicetree/bindings/display/panel/toshiba,lt089ac29000.txt
> @@ -1,7 +1,10 @@
>  Toshiba 8.9" WXGA (1280x768) TFT LCD panel
>  
>  Required properties:
> -- compatible: should be "toshiba,lt089ac29000"
> +- compatible: should be one of the following
> +	      "toshiba,lt089ac29000"
> +	      "toshiba,lta089ac29000"
> +
>  - power-supply: as specified in the base binding
>  
>  This binding is compatible with the simple-panel binding, which is specified

While at it, any change to convert this binding to .yaml ? For panels
it's fairly easy.

> diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> index bff7578f84dd..4c1deed44ce2 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -2857,6 +2857,39 @@ static const struct panel_desc toshiba_lt089ac29000 = {
>  	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
>  };
>  
> +static const struct drm_display_mode toshiba_lta089ac29000_mode = {
> +	.clock = 79500,
> +	.hdisplay = 1280,
> +	.hsync_start = 1280 + 192,
> +	.hsync_end = 1280 + 192 + 128,
> +	.htotal = 1280 + 192 + 128 + 64,
> +	.vdisplay = 768,
> +	.vsync_start = 768 + 20,
> +	.vsync_end = 768 + 20 + 7,
> +	.vtotal = 768 + 20 + 7 + 3,
> +	.vrefresh = 60,
> +};
> +
> +static const struct panel_desc toshiba_lta089ac29000 = {
> +	.modes = &toshiba_lta089ac29000_mode,
> +	.num_modes = 1,
> +	.size = {
> +		.width = 194,
> +		.height = 116,
> +	},
> +	/*
> +	 * FIXME:
> +	 * The panel supports 2 bus formats: jeida-24 and jeida-18. The
> +	 * mode is selected through the 8b6b_SEL pin. If anyone ever needs
> +	 * support for jeida-18 we should probably parse the 'data-mapping'
> +	 * property.
> +	 * In the unlikely event where 8b6b_SEL is connected to a GPIO, we'd
> +	 * need a new infra to allow bus format negotiation at the panel level.

I would also leave the GPIO case for later, but it would be nice to already
implement reading the data-mapping property, in order to validate the DT
(you should add the data-mapping property to the bindings by the way).
Bonus points if it can be done in a way that is also usable by other
panels.

> +	 */
> +	.bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA,
> +	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
> +};
> +
>  static const struct drm_display_mode tpk_f07a_0102_mode = {
>  	.clock = 33260,
>  	.hdisplay = 800,
> @@ -3305,6 +3338,9 @@ static const struct of_device_id platform_of_match[] = {
>  	}, {
>  		.compatible = "toshiba,lt089ac29000",
>  		.data = &toshiba_lt089ac29000,
> +	}, {
> +		.compatible = "toshiba,lta089ac29000",
> +		.data = &toshiba_lta089ac29000,
>  	}, {
>  		.compatible = "tpk,f07a-0102",
>  		.data = &tpk_f07a_0102,

-- 
Regards,

Laurent Pinchart