diff options
| author |   Mario Limonciello <mario.limonciello@amd.com> | 2025-02-23 00:04:35 -0600 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2025-03-10 13:27:39 -0400 |
| commit | 5e19e2b57b6bb640d68dfc7991e1e182922cf867 (patch) | |
| tree | a782d32a7bdd588038153049196c84258c5773d1 /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | |
| parent | drm/amd/display: fix default brightness (diff) | |
| download | linux-rng-5e19e2b57b6bb640d68dfc7991e1e182922cf867.tar.xz linux-rng-5e19e2b57b6bb640d68dfc7991e1e182922cf867.zip | |
drm/amd/display: Restore correct backlight brightness after a GPU reset
[Why]
GPU reset will attempt to restore cached state, but brightness doesn't
get restored. It will come back at 100% brightness, but userspace thinks
it's the previous value.
[How]
When running resume sequence if GPU is in reset restore brightness
to previous value.
Acked-by: Wayne Lin <Wayne.Lin@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 10 |
1 files changed, 10 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 5ae521d1b74b..bf69cd50712e 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -250,6 +250,10 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev, static void handle_hpd_irq_helper(struct amdgpu_dm_connector *aconnector); static void handle_hpd_rx_irq(void *param); +static void amdgpu_dm_backlight_set_level(struct amdgpu_display_manager *dm, + int bl_idx, + u32 user_brightness); + static bool is_timing_unchanged_for_freesync(struct drm_crtc_state *old_crtc_state, struct drm_crtc_state *new_crtc_state); @@ -3432,6 +3436,12 @@ static int dm_resume(struct amdgpu_ip_block *ip_block) mutex_unlock(&dm->dc_lock); + /* set the backlight after a reset */ + for (i = 0; i < dm->num_of_edps; i++) { + if (dm->backlight_dev[i]) + amdgpu_dm_backlight_set_level(dm, i, dm->brightness[i]); + } + return 0; } |