Re: [PATCH v4] drm/panel: Add support for E Ink VB3300-KCA

[Sam Ravnborg <sam@ravnborg.org>]

Hi Alistair,

On Thu, Jul 29, 2021 at 08:33:58PM +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@alistair23.me>
> Acked-by: Rob Herring <robh@kernel.org>
> ---
> v4:
>  - Fixup alphebetical sorting
> 
>  .../bindings/display/panel/panel-simple.yaml  |  2 ++
>  .../devicetree/bindings/vendor-prefixes.yaml  |  2 ++
>  drivers/gpu/drm/panel/panel-simple.c          | 29 +++++++++++++++++++
>  3 files changed, 33 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> index b3797ba2698b..799e20222551 100644
> --- a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> +++ b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> @@ -128,6 +128,8 @@ properties:
>          # Emerging Display Technology Corp. WVGA TFT Display with capacitive touch
>        - edt,etm0700g0dh6
>        - edt,etm0700g0edh6
> +        # E Ink VB3300-KCA
> +      - eink,vb3300-kca
>          # Evervision Electronics Co. Ltd. VGG804821 5.0" WVGA TFT LCD Panel
>        - evervision,vgg804821
>          # Foxlink Group 5" WVGA TFT LCD panel
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> index 71da86e7b3a2..31745c45dd92 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> @@ -339,6 +339,8 @@ patternProperties:
>      description: eGalax_eMPIA Technology Inc
>    "^einfochips,.*":
>      description: Einfochips
> +  "^eink,.*":
> +    description: E Ink Corporation
>    "^elan,.*":
>      description: Elan Microelectronic Corp.
>    "^element14,.*":
> diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> index 21939d4352cf..8d6317b85465 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -2046,6 +2046,32 @@ 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 = {
> +	.timings = &eink_vb3300_kca_timing,
> +	.num_timings = 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,
> +};
We need the connector_type here.

With this added:
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>

I will apply if you update the patch with this.
I cannot do it as I do not know what connector_type to use.

	Sam
> +
>  static const struct display_timing evervision_vgg804821_timing = {
>  	.pixelclock = { 27600000, 33300000, 50000000 },
>  	.hactive = { 800, 800, 800 },
> @@ -4350,6 +4376,9 @@ static const struct of_device_id platform_of_match[] = {
>  	}, {
>  		.compatible = "edt,etm0700g0edh6",
>  		.data = &edt_etm0700g0bdh6,
> +	}, {
> +		.compatible = "eink,vb3300-kca",
> +		.data = &eink_vb3300_kca,
>  	}, {
>  		.compatible = "evervision,vgg804821",
>  		.data = &evervision_vgg804821,
> -- 
> 2.31.1