[PATCH v3 7/8] drm/simpledrm: Support the XB24/AB24 format

[Thomas Zimmermann]

Hi

Am 17.11.22 um 19:40 schrieb Thierry Reding:
> From: Thierry Reding <treding at nvidia.com>
> 
> Add XB24 and AB24 to the list of supported formats. The format helpers
> support conversion to these formats and they are documented in the
> simple-framebuffer device tree bindings.
> 
> Signed-off-by: Thierry Reding <treding at nvidia.com>
> ---
> Changes in v2:
> - treat AB24 as XB24 and support both at the same time
> 
>   drivers/gpu/drm/tiny/simpledrm.c       | 2 ++
>   include/linux/platform_data/simplefb.h | 1 +
>   2 files changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c
> index 7f39bc58da52..ba1c2057fc65 100644
> --- a/drivers/gpu/drm/tiny/simpledrm.c
> +++ b/drivers/gpu/drm/tiny/simpledrm.c
> @@ -483,6 +483,8 @@ static int simpledrm_device_init_regulators(struct simpledrm_device *sdev)
>   static const uint32_t simpledrm_primary_plane_formats[] = {
>   	DRM_FORMAT_XRGB8888,
>   	DRM_FORMAT_ARGB8888,
> +	DRM_FORMAT_XBGR8888,
> +	DRM_FORMAT_ABGR8888,

Does the hardware *really* support AB42 on its primary plane?

We recently had a discussion about the exported formats and the 
consensus is that we only want the hardware's native formats plus 
XRGB888. That's not implemented yet in simpledrm, but this format list 
will soon see a larger cleanup.

So I think ARGB8888 likely shouldn't be on the list here.

Best regards
Thomas

>   	DRM_FORMAT_RGB565,
>   	//DRM_FORMAT_XRGB1555,
>   	//DRM_FORMAT_ARGB1555,
> diff --git a/include/linux/platform_data/simplefb.h b/include/linux/platform_data/simplefb.h
> index 27ea99af6e1d..4f94d52ac99f 100644
> --- a/include/linux/platform_data/simplefb.h
> +++ b/include/linux/platform_data/simplefb.h
> @@ -22,6 +22,7 @@
>   	{ "r8g8b8", 24, {16, 8}, {8, 8}, {0, 8}, {0, 0}, DRM_FORMAT_RGB888 }, \
>   	{ "x8r8g8b8", 32, {16, 8}, {8, 8}, {0, 8}, {0, 0}, DRM_FORMAT_XRGB8888 }, \
>   	{ "a8r8g8b8", 32, {16, 8}, {8, 8}, {0, 8}, {24, 8}, DRM_FORMAT_ARGB8888 }, \
> +	{ "x8b8g8r8", 32, {0, 8}, {8, 8}, {16, 8}, {0, 0}, DRM_FORMAT_XBGR8888 }, \
>   	{ "a8b8g8r8", 32, {0, 8}, {8, 8}, {16, 8}, {24, 8}, DRM_FORMAT_ABGR8888 }, \
>   	{ "x2r10g10b10", 32, {20, 10}, {10, 10}, {0, 10}, {0, 0}, DRM_FORMAT_XRGB2101010 }, \
>   	{ "a2r10g10b10", 32, {20, 10}, {10, 10}, {0, 10}, {30, 2}, DRM_FORMAT_ARGB2101010 }, \

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev
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