diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2021-11-23 10:44:48 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-11-24 14:06:54 -0500 |
| commit | 1f5792549376b3c20639cef7b787cf6262177b66 (patch) | |
| tree | cf02f5f8f1e29b09eab50e3045d17b3fac0a14fe /drivers/gpu/drm/amd/display | |
| parent | 081664ef3e43dce93710ed5ece326478edbe0934 (diff) | |
| download | linux-stable-1f5792549376b3c20639cef7b787cf6262177b66.tar.gz linux-stable-1f5792549376b3c20639cef7b787cf6262177b66.tar.bz2 linux-stable-1f5792549376b3c20639cef7b787cf6262177b66.zip | |
drm/amd/display: update bios scratch when setting backlight
Update the bios scratch register when updating the backlight
level. Some platforms apparently read this scratch register
and do additional operations in their hotkey handlers.
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1518
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 40a4269770fa..05e4a0952a2b 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -51,6 +51,7 @@ #include <drm/drm_hdcp.h> #endif #include "amdgpu_pm.h" +#include "amdgpu_atombios.h" #include "amd_shared.h" #include "amdgpu_dm_irq.h" @@ -3918,6 +3919,9 @@ static int amdgpu_dm_backlight_set_level(struct amdgpu_display_manager *dm, caps = dm->backlight_caps[bl_idx]; dm->brightness[bl_idx] = user_brightness; + /* update scratch register */ + if (bl_idx == 0) + amdgpu_atombios_scratch_regs_set_backlight_level(dm->adev, dm->brightness[bl_idx]); brightness = convert_brightness_from_user(&caps, dm->brightness[bl_idx]); link = (struct dc_link *)dm->backlight_link[bl_idx]; |