diff options
| author |   Aurabindo Pillai <aurabindo.pillai@amd.com> | 2025-02-24 14:24:45 -0500 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2025-03-05 10:46:44 -0500 |
| commit | 41b830476009f50233e8df538113765c0a59308d (patch) | |
| tree | d7748d44f1dfd67d2a6c15d475edea6384ee3953 /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | |
| parent | drm/amdgpu: Update headers for CPER support on SRIOV (diff) | |
| download | linux-rng-41b830476009f50233e8df538113765c0a59308d.tar.xz linux-rng-41b830476009f50233e8df538113765c0a59308d.zip | |
drm/amd/display: Add workaround for a panel
Implement w/a for a panel which requires 10s delay after link detect.
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Reviewed-by: Alex Hung <alex.hung@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 | 27 |
1 files changed, 26 insertions, 1 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 58848d6b475a..7faf0d0cc23c 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -3330,6 +3330,24 @@ static void dm_gpureset_commit_state(struct dc_state *dc_state, } } +static void apply_delay_after_dpcd_poweroff(struct amdgpu_device *adev, + struct dc_sink *sink) +{ + struct dc_panel_patch *ppatch = NULL; + + if (!sink) + return; + + ppatch = &sink->edid_caps.panel_patch; + if (ppatch->wait_after_dpcd_poweroff_ms) { + msleep(ppatch->wait_after_dpcd_poweroff_ms); + drm_dbg_driver(adev_to_drm(adev), + "%s: adding a %ds delay as w/a for panel\n", + __func__, + ppatch->wait_after_dpcd_poweroff_ms / 1000); + } +} + static int dm_resume(struct amdgpu_ip_block *ip_block) { struct amdgpu_device *adev = ip_block->adev; @@ -3451,6 +3469,7 @@ static int dm_resume(struct amdgpu_ip_block *ip_block) /* Do detection*/ drm_connector_list_iter_begin(ddev, &iter); drm_for_each_connector_iter(connector, &iter) { + bool ret; if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) continue; @@ -3476,7 +3495,11 @@ static int dm_resume(struct amdgpu_ip_block *ip_block) } else { guard(mutex)(&dm->dc_lock); dc_exit_ips_for_hw_access(dm->dc); - dc_link_detect(aconnector->dc_link, DETECT_REASON_RESUMEFROMS3S4); + ret = dc_link_detect(aconnector->dc_link, DETECT_REASON_RESUMEFROMS3S4); + if (ret) { + /* w/a delay for certain panels */ + apply_delay_after_dpcd_poweroff(adev, aconnector->dc_sink); + } } if (aconnector->fake_enable && aconnector->dc_link->local_sink) @@ -3842,6 +3865,8 @@ static void handle_hpd_irq_helper(struct amdgpu_dm_connector *aconnector) ret = dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD); } if (ret) { + /* w/a delay for certain panels */ + apply_delay_after_dpcd_poweroff(adev, aconnector->dc_sink); amdgpu_dm_update_connector_after_detect(aconnector); drm_modeset_lock_all(dev); |