diff options
| author | Mario Limonciello <mario.limonciello@amd.com> | 2025-07-18 14:20:45 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-10-28 09:56:14 -0400 |
| commit | 1454642960b0a4fafd48b08919d39350ee2ac372 (patch) | |
| tree | f265fa3ded777b8026b473d6ec03978fb48840c6 /drivers/gpu/drm/amd/amdgpu/amdgpu_display.h | |
| parent | 90ef1dcb1d2bb84ad998e845e26a2a297a7ddfd6 (diff) | |
drm/amd: Re-introduce property to control adaptive backlight modulation
commit 0887054d14ae ("drm/amd: Drop abm_level property") dropped the
abm level property in favor of sysfs control. Since then there have
been discussions that compositors showed an interest in modifying
a vendor specific property instead.
So re-introduce the abm level property, but with different semantics.
Rather than being an integer it's now an enum. One of the enum options
is 'sysfs', and that is because there is still a sysfs file for use by
userspace when the compositor doesn't support this property.
If usespace has not modified this property, the default value will
be for sysfs to control it. Once userspace has set the property stop
allowing sysfs control.
The property is only attached to non-OLED eDP panels.
Cc: Xaver Hugl <xaver.hugl@kde.org>
Reviewed-by: Harry Wentland <harry.wentland@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_display.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_display.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.h index 930c171473b4..49a29bf47a37 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.h @@ -55,4 +55,11 @@ int amdgpu_display_resume_helper(struct amdgpu_device *adev); int amdgpu_display_get_scanout_buffer(struct drm_plane *plane, struct drm_scanout_buffer *sb); +#define ABM_SYSFS_CONTROL -1 +#define ABM_LEVEL_OFF 0 +#define ABM_LEVEL_MIN 1 +#define ABM_LEVEL_BIAS_MIN 2 +#define ABM_LEVEL_BIAS_MAX 3 +#define ABM_LEVEL_MAX 4 + #endif |