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Revert "drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume"

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This fix regressed the original issue that commit 7875afafba
("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: a490c8d77d ("drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4620
Cc: stable@vger.kernel.org
Signed-off-by: Matthew Schwartz <matthew.schwartz@linux.dev>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Matthew Schwartz
2025-10-09 14:19:00 +02:00
committed by Alex Deucher
parent 3a86608788
commit 9858ea4c29
2 changed files with 4 additions and 15 deletions
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12
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@@ -2085,8 +2085,6 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
dc_hardware_init(adev->dm.dc);
adev->dm.restore_backlight = true;
adev->dm.hpd_rx_offload_wq = hpd_rx_irq_create_workqueue(adev);
if (!adev->dm.hpd_rx_offload_wq) {
drm_err(adev_to_drm(adev), "failed to create hpd rx offload workqueue.\n");
@@ -3442,7 +3440,6 @@ static int dm_resume(struct amdgpu_ip_block *ip_block)
dc_set_power_state(dm->dc, DC_ACPI_CM_POWER_STATE_D0);
dc_resume(dm->dc);
adev->dm.restore_backlight = true;
amdgpu_dm_irq_resume_early(adev);
@@ -9969,6 +9966,7 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
bool mode_set_reset_required = false;
u32 i;
struct dc_commit_streams_params params = {dc_state->streams, dc_state->stream_count};
bool set_backlight_level = false;
/* Disable writeback */
for_each_old_connector_in_state(state, connector, old_con_state, i) {
@@ -10088,6 +10086,7 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
acrtc->hw_mode = new_crtc_state->mode;
crtc->hwmode = new_crtc_state->mode;
mode_set_reset_required = true;
set_backlight_level = true;
} else if (modereset_required(new_crtc_state)) {
drm_dbg_atomic(dev,
"Atomic commit: RESET. crtc id %d:[%p]\n",
@@ -10144,16 +10143,13 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
* to fix a flicker issue.
* It will cause the dm->actual_brightness is not the current panel brightness
* level. (the dm->brightness is the correct panel level)
* So we set the backlight level with dm->brightness value after initial
* set mode. Use restore_backlight flag to avoid setting backlight level
* for every subsequent mode set.
* So we set the backlight level with dm->brightness value after set mode
*/
if (dm->restore_backlight) {
if (set_backlight_level) {
for (i = 0; i < dm->num_of_edps; i++) {
if (dm->backlight_dev[i])
amdgpu_dm_backlight_set_level(dm, i, dm->brightness[i]);
}
dm->restore_backlight = false;
}
}

7
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
View File

@@ -630,13 +630,6 @@ struct amdgpu_display_manager {
*/
u32 actual_brightness[AMDGPU_DM_MAX_NUM_EDP];
/**
* @restore_backlight:
*
* Flag to indicate whether to restore backlight after modeset.
*/
bool restore_backlight;
/**
* @aux_hpd_discon_quirk:
*