diff options
| author |   Qingqing Zhuo <qingqing.zhuo@amd.com> | 2021-08-27 06:58:38 -0400 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2021-09-16 09:56:24 -0400 |
| commit | 4e00a434a08e0654a4dd9347485d9ec85deee1ef (patch) | |
| tree | 7a1c22e974054427bf429b44c070729bebfabf4b /drivers/gpu | |
| parent | drm/amd/display: dsc mst 2 4K displays go dark with 2 lane HBR3 (diff) | |
| download | linux-dev-4e00a434a08e0654a4dd9347485d9ec85deee1ef.tar.xz linux-dev-4e00a434a08e0654a4dd9347485d9ec85deee1ef.zip | |
drm/amd/display: Fix unstable HPCP compliance on Chrome Barcelo
[Why]
Intermittently, there presents two occurrences of 0 stream
commits in a single HPD event. Current HDCP sequence does
not consider such scenerio, and will thus disable HDCP.
[How]
Add condition check to include stream remove and re-enable
case for HDCP enable.
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Acked-by: Mikita Lipski <mikita.lipski@amd.com>
Signed-off-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 22 |
1 files changed, 20 insertions, 2 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 deb8010efc69..5975233dfa77 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -8067,8 +8067,26 @@ static bool is_content_protection_different(struct drm_connector_state *state, state->content_protection == DRM_MODE_CONTENT_PROTECTION_ENABLED) state->content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED; - /* Check if something is connected/enabled, otherwise we start hdcp but nothing is connected/enabled - * hot-plug, headless s3, dpms + /* Stream removed and re-enabled + * + * Can sometimes overlap with the HPD case, + * thus set update_hdcp to false to avoid + * setting HDCP multiple times. + * + * Handles: DESIRED -> DESIRED (Special case) + */ + if (!(old_state->crtc && old_state->crtc->enabled) && + state->crtc && state->crtc->enabled && + connector->state->content_protection == DRM_MODE_CONTENT_PROTECTION_DESIRED) { + dm_con_state->update_hdcp = false; + return true; + } + + /* Hot-plug, headless s3, dpms + * + * Only start HDCP if the display is connected/enabled. + * update_hdcp flag will be set to false until the next + * HPD comes in. * * Handles: DESIRED -> DESIRED (Special case) */ |