APPLIED[G]: [PATCH 0/1][SRU][G] UBUNTU: SAUCE: Fix brightness control on BOE 2270 panel

[Stefan Bader]

On 10.12.20 09:16, Aaron Ma wrote:
> BugLink: https://bugs.launchpad.net/bugs/1904991
> 
> [Impact]
> BOE 2270 panel is used by several models of ThinkPads.
> This brightness can not be controlled by default PWM.
> 
> [Fix]
> The panel claims both PWM and AUX supports.
> But actually PWM works on SDR mode, AUX works on HDR mode.
> Intel i915 driver got a new SDR support to use PWM by maintainer, still
> in upstream review.
> To fix this on certain project, use a quirk first to fix this.
> The maintainer's fix can be backported in future.
> 
> [Test Case]
> Backlight brightness can be changed.
> 
> [Regression Potential]
> The BOE 2270 backlight brightness can not be changed.
> Fix for specific panel ID, no effects for others.
> Send it to groovy, oem-5.6 already got one.
> 
> Aaron Ma (1):
>   UBUNTU: SAUCE: drm/i915: Force DPCD backlight mode for BOE 2270 panel
> 
>  drivers/gpu/drm/drm_dp_helper.c | 1 +
>  1 file changed, 1 insertion(+)
> 
This is just for clarity as Ian's message sent about this, at least for me, ends
up in a previous thread of this.

-Stefan

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20201217/caf336ee/attachment.sig>