[PATCH 2/3] drm/format-helper: Add drm_fb_xrgb8888_to_xrgb2101010_dstclip()

[Pekka Paalanen]

On Wed, 17 Nov 2021 23:58:28 +0900
Hector Martin <marcan at marcan.st> wrote:

> Add XRGB8888 emulation support for devices that can only do XRGB2101010.
> 
> This is chiefly useful for simpledrm on Apple devices where the
> bootloader-provided framebuffer is 10-bit, which already works fine with
> simplefb. This is required to make simpledrm support this too.
> 
> Signed-off-by: Hector Martin <marcan at marcan.st>
> ---
>  drivers/gpu/drm/drm_format_helper.c | 64 +++++++++++++++++++++++++++++
>  include/drm/drm_format_helper.h     |  4 ++
>  2 files changed, 68 insertions(+)

Hi Hector,

I'm curious, since the bootloader seems to always set up a 10-bit mode,
is there a reason for it that you can guess? Is the monitor in WCG or
even HDR mode?


Thanks,
pq
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