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drm/amd/display: fix access hdcp_workqueue assert

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[Why] hdcp are enabled for asics from raven. for old asics
which hdcp are not enabled, hdcp_workqueue are null. some
access to hdcp work queue are not guarded with pointer check.

[How] add hdcp_workqueue pointer check before access workqueue.

Fixes: 82986fd631 ("drm/amd/display: save restore hdcp state when display is unplugged from mst hub")
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2444
Reported-by: Niklāvs Koļesņikovs <89q1r14hd@relay.firefox.com>
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Hersen Wu 2023-03-28 10:45:24 -04:00 committed by Alex Deucher
parent 0c0463ff01
commit 3cf7cd3f77
2 changed files with 16 additions and 6 deletions
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6
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@ -8559,6 +8559,9 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
struct amdgpu_crtc *acrtc = to_amdgpu_crtc(dm_new_con_state->base.crtc);
struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
if (!adev->dm.hdcp_workqueue)
continue;
pr_debug("[HDCP_DM] -------------- i : %x ----------\n", i);
if (!connector)
@ -8607,6 +8610,9 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
struct amdgpu_crtc *acrtc = to_amdgpu_crtc(dm_new_con_state->base.crtc);
struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
if (!adev->dm.hdcp_workqueue)
continue;
new_crtc_state = NULL;
old_crtc_state = NULL;

16
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
View File

@ -379,13 +379,17 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
if (aconnector->dc_sink && connector->state) {
struct drm_device *dev = connector->dev;
struct amdgpu_device *adev = drm_to_adev(dev);
struct hdcp_workqueue *hdcp_work = adev->dm.hdcp_workqueue;
struct hdcp_workqueue *hdcp_w = &hdcp_work[aconnector->dc_link->link_index];
connector->state->hdcp_content_type =
hdcp_w->hdcp_content_type[connector->index];
connector->state->content_protection =
hdcp_w->content_protection[connector->index];
if (adev->dm.hdcp_workqueue) {
struct hdcp_workqueue *hdcp_work = adev->dm.hdcp_workqueue;
struct hdcp_workqueue *hdcp_w =
&hdcp_work[aconnector->dc_link->link_index];
connector->state->hdcp_content_type =
hdcp_w->hdcp_content_type[connector->index];
connector->state->content_protection =
hdcp_w->content_protection[connector->index];
}
}
if (aconnector->dc_sink) {