[PATCH 1/1] UBUNTU: SAUCE: drm/i915: Force DPCD backlight mode for Samsung 16727 panel

[Stefan Bader]

On 02.06.21 08:57, Aaron Ma wrote:
> BugLink: https://bugs.launchpad.net/bugs/1930527
> 
> Another Samsung OLED panel needs DPCD to get control of backlight.
> Kernel 5.12+ support the backlight via:
> commit: <4a8d79901d5b> ("drm/i915/dp: Enable Intel's HDR backlight interface (only SDR for now)")
> Only make backlight work on lower versions of kernel.
> 
> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/3474
> Cc: stable at vger.kernel.org # 5.11-
> Signed-off-by: Aaron Ma <aaron.ma at canonical.com>
> Link: https://lore.kernel.org/lkml/20210519095305.47133-1-aaron.ma@canonical.com/
> Signed-off-by: Aaron Ma <aaron.ma at canonical.com>
> ---

This still has not appeared on linux-next/linux. That does not sound like this 
is SRU material (for Hirsute).

-Stefan

>   drivers/gpu/drm/drm_dp_helper.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
> index 8cba5bb1894f..6d1c424e0c7a 100644
> --- a/drivers/gpu/drm/drm_dp_helper.c
> +++ b/drivers/gpu/drm/drm_dp_helper.c
> @@ -1967,6 +1967,7 @@ static const struct edid_quirk edid_quirk_list[] = {
>   	{ MFG(0x4c, 0x83), PROD_ID(0x47, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
>   	{ MFG(0x4c, 0x83), PROD_ID(0x4f, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
>   	{ MFG(0x09, 0xe5), PROD_ID(0xde, 0x08), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
> +	{ MFG(0x4c, 0x83), PROD_ID(0x57, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) },
>   };
>   
>   #undef MFG
> 


-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_signature
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20210615/7e21a68d/attachment.sig>