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| author | Mario Limonciello <mario.limonciello@amd.com> | 2023-12-06 12:08:26 -0600 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-12-07 17:42:30 -0500 |
| commit | a2020be69490ee8778c59a02e7b270dfeecffbd4 (patch) | |
| tree | 8ccedb2b1f87b7569978f71f56d970ae447afedd /drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h | |
| parent | 0497ae6f8830816d9277a8d5c8d9bf5966f292e1 (diff) | |
drm/amd/display: Restore guard against default backlight value < 1 nit
Mark reports that brightness is not restored after Xorg dpms screen blank.
This behavior was introduced by commit d9e865826c20 ("drm/amd/display:
Simplify brightness initialization") which dropped the cached backlight
value in display code, but also removed code for when the default value
read back was less than 1 nit.
Restore this code so that the backlight brightness is restored to the
correct default value in this circumstance.
Reported-by: Mark Herbert <mark.herbert42@gmail.com>
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3031
Cc: stable@vger.kernel.org
Cc: Camille Cho <camille.cho@amd.com>
Cc: Krunoslav Kovac <krunoslav.kovac@amd.com>
Cc: Hamza Mahfooz <hamza.mahfooz@amd.com>
Fixes: d9e865826c20 ("drm/amd/display: Simplify brightness initialization")
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h')
0 files changed, 0 insertions, 0 deletions