linux-kernel - Re: [PATCH] Revert "drm/amd/display: Only restore backlight after amdgpu_dm_init or dm

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Message-ID: <2025100931-retorted-mystified-bd52@gregkh>
Date: Thu, 9 Oct 2025 11:51:38 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Matthew Schwartz <matthew.schwartz@...ux.dev>
Cc: harry.wentland@....com, christian.koenig@....com, sunpeng.li@....com,
	airlied@...il.com, simona@...ll.ch, alexander.deucher@....com,
	linux-kernel@...r.kernel.org, mario.limonciello@....com,
	amd-gfx@...ts.freedesktop.org, stable@...r.kernel.org,
	regressions@...ts.linux.dev
Subject: Re: [PATCH] Revert "drm/amd/display: Only restore backlight after
 amdgpu_dm_init or dm_resume"

On Thu, Oct 09, 2025 at 11:23:01AM +0200, Matthew Schwartz wrote:
> This fix regressed the original issue that commit d83c747a1225
> ("drm/amd/display: Fix brightness level not retained over reboot") solved,
> so revert it until a different approach to solve the regression that
> it caused with AMD_PRIVATE_COLOR is found.
> 
> Fixes: a490c8d77d50 ("drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume")
> Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4620
> Signed-off-by: Matthew Schwartz <matthew.schwartz@...ux.dev>
> ---
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 ++++--------
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  7 -------
>  2 files changed, 4 insertions(+), 15 deletions(-)

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>