Re: [PATCH 1/3] drm/panel: Add RGB666 variant of Innolux AT070TN92

From: Maxime Ripard
Date: Wed Apr 11 2018 - 02:28:42 EST


On Tue, Apr 10, 2018 at 11:31:27PM +0200, Paul Kocialkowski wrote:
> This adds timings for the RGB666 variant of the Innolux AT070TN92 panel,
> as found on the Ainol AW1 tablet.
>
> Signed-off-by: Paul Kocialkowski <contact@xxxxxxxx>
> ---
> 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 5591984a392b..efeb2f2162bc 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -1063,6 +1063,29 @@ static const struct panel_desc innolux_at070tn92 = {
> .bus_format = MEDIA_BUS_FMT_RGB888_1X24,
> };
>
> +static const struct drm_display_mode innolux_at070tn92_rgb666_mode = {
> + .clock = 40000,
> + .hdisplay = 800,
> + .hsync_start = 800 + 112,
> + .hsync_end = 800 + 112 + 1,
> + .htotal = 800 + 112 + 1 + 87,
> + .vdisplay = 480,
> + .vsync_start = 480 + 141,
> + .vsync_end = 480 + 141 + 1,
> + .vtotal = 480 + 141 + 1 + 38,
> + .vrefresh = 60,
> +};

I'm not sure why you'd need different timings if the only difference
is the bus width.

> +static const struct panel_desc innolux_at070tn92_rgb666 = {
> + .modes = &innolux_at070tn92_rgb666_mode,
> + .num_modes = 1,
> + .size = {
> + .width = 154,
> + .height = 86,
> + },
> + .bus_format = MEDIA_BUS_FMT_RGB666_1X18,
> +};
> +
> static const struct display_timing innolux_g101ice_l01_timing = {
> .pixelclock = { 60400000, 71100000, 74700000 },
> .hactive = { 1280, 1280, 1280 },
> @@ -2105,6 +2128,9 @@ static const struct of_device_id platform_of_match[] = {
> }, {
> .compatible = "innolux,at070tn92",
> .data = &innolux_at070tn92,
> + }, {
> + .compatible = "innolux,at070tn92-rgb666",
> + .data = &innolux_at070tn92_rgb666,

And this isn't a different device, it's just the integration in the
board that is different, so you shouldn't have a different compatible
here, but rather something like the bus-width property documented in
the Documentation/devicetree/bindings/media/video-interfaces.txt file.

Maxime

--
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

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