linux-kernel - Re: [PATCH 2/2] drm/panel: Add support for E Ink VB3300-KCA

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Date:   Wed, 21 Apr 2021 17:57:40 -0500
From:   Rob Herring <robh@...nel.org>
To:     Alistair Francis <alistair@...stair23.me>
Cc:     thierry.reding@...il.com, sam@...nborg.org, krzk@...nel.org,
        shawnguo@...nel.org, daniel@...f.com, linux@...pel-privat.de,
        kuninori.morimoto.gx@...esas.com, Max.Merchel@...group.com,
        geert+renesas@...der.be, airlied@...ux.ie, daniel@...ll.ch,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 2/2] drm/panel: Add support for E Ink VB3300-KCA

On Mon, Apr 19, 2021 at 07:09:56AM +1000, Alistair Francis wrote:
> Add support for the 10.3" E Ink panel described at:
> https://www.eink.com/product.html?type=productdetail&id=7
> 
> Signed-off-by: Alistair Francis <alistair@...stair23.me>
> ---
>  drivers/gpu/drm/panel/panel-simple.c | 29 ++++++++++++++++++++++++++++
>  1 file changed, 29 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> index 4e2dad314c79..f1f6fd2517f6 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -1964,6 +1964,32 @@ static const struct panel_desc edt_etm0700g0bdh6 = {
>  	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
>  };
>  
> +static const struct display_timing eink_vb3300_kca_timing = {
> +	.pixelclock = { 40000000, 40000000, 40000000 },
> +	.hactive = { 334, 334, 334 },
> +	.hfront_porch = { 1, 1, 1 },
> +	.hback_porch = { 1, 1, 1 },
> +	.hsync_len = { 1, 1, 1 },
> +	.vactive = { 1405, 1405, 1405 },
> +	.vfront_porch = { 1, 1, 1 },
> +	.vback_porch = { 1, 1, 1 },
> +	.vsync_len = { 1, 1, 1 },
> +	.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
> +		 DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE,
> +};
> +
> +static const struct panel_desc eink_vb3300_kca = {
> +	.modes = &edt_etm0700g0dh6_mode,
> +	.num_modes = 1,
> +	.bpc = 6,
> +	.size = {
> +		.width = 157,
> +		.height = 209,
> +	},
> +	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
> +	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
> +};
> +
>  static const struct display_timing evervision_vgg804821_timing = {
>  	.pixelclock = { 27600000, 33300000, 50000000 },
>  	.hactive = { 800, 800, 800 },
> @@ -4232,6 +4258,9 @@ static const struct of_device_id platform_of_match[] = {
>  	}, {
>  		.compatible = "edt,etm0700g0dh6",
>  		.data = &edt_etm0700g0dh6,
> +	}, {
> +		.compatible = "eink,vb3300-kca",

You have to document this string too.