Re: [PATCH] drm/panel-simple: Add Vivax TPC-9150 panel

[Sam Ravnborg <sam@ravnborg.org>]

Hi Nikola,

see a few comments in the following.

On Tue, Aug 17, 2021 at 10:32:01AM +0200, Nikola Pavlica wrote:
> The model and make of the LCD panel of the Vivax TPC-9150 is unknown,
> hence the panel settings that were retrieved with a FEX dump are named
> after the device NOT the actual panel.
> 
> The LCD in question is a 50 pin MISO TFT LCD panel of the resolution
> 1024x600 used by the aforementioned device.
> 
> Signed-off-by: Nikola Pavlica <pavlica.nikola@gmail.com>
> ---
>  drivers/gpu/drm/panel/panel-simple.c | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> index 4e2dad314c79..97fc3c5740bb 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -4090,6 +4090,29 @@ static const struct panel_desc arm_rtsm = {
>  	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
>  };
>  
> +static const struct drm_display_mode vivax_tpc9150_panel_mode = {
> +	.clock = 60000,
> +	.hdisplay = 1024,
> +	.hsync_start = 1024 + 160,
> +	.hsync_end = 1024 + 160 + 100,
> +	.htotal = 1024 + 160 + 100 + 60,
> +	.vdisplay = 600,
> +	.vsync_start = 600 + 12,
> +	.vsync_end = 600 + 12 + 10,
> +	.vtotal = 600 + 12 + 10 + 13,
> +};
.flags?

> +
> +static const struct panel_desc vivax_tpc9150_panel = {
> +	.modes = &vivax_tpc9150_panel_mode,
> +	.num_modes = 1,
> +	.size = {
> +		.width = 223,
> +		.height = 125,
> +	},
> +	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
> +	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
> +};

Specifying .connector_type is mandatory today.
Please specify .bpc too.

Consider if .bus_flags cover it all, they can be a little tricky to add
them all. And many many displays have failed to do so.

I hope to see a new version soon with these comments and also the
comments from Thierry fixed.

	Sam

> +
>  static const struct of_device_id platform_of_match[] = {
>  	{
>  		.compatible = "ampire,am-1280800n3tzqw-t00h",
> @@ -4103,6 +4126,9 @@ static const struct of_device_id platform_of_match[] = {
>  	}, {
>  		.compatible = "arm,rtsm-display",
>  		.data = &arm_rtsm,
> +	}, {
> +		.compatible = "vivax,tpc9150-panel",
> +		.data = &vivax_tpc9150_panel,
>  	}, {
>  		.compatible = "armadeus,st0700-adapt",
>  		.data = &armadeus_st0700_adapt,
> -- 
> 2.32.0