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

On Wed, 17 Nov 2021 23:58:28 +0900 Hector Martin marcan@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@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