This is a note to let you know that I've just added the patch titled
drm/amd/display: fix access hdcp_workqueue assert
to the 6.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-fix-access-hdcp_workqueue-assert.patch
and it can be found in the queue-6.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3cf7cd3f770a0b89dc5f06e19edb52e65b93b214 Mon Sep 17 00:00:00 2001
From: Hersen Wu <hersenxs.wu@xxxxxxx>
Date: Tue, 28 Mar 2023 10:45:24 -0400
Subject: drm/amd/display: fix access hdcp_workqueue assert
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
From: Hersen Wu <hersenxs.wu@xxxxxxx>
commit 3cf7cd3f770a0b89dc5f06e19edb52e65b93b214 upstream.
[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: 82986fd631fa ("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@xxxxxxxxxxxxxxxxx>
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@xxxxxxx>
Acked-by: Qingqing Zhuo <qingqing.zhuo@xxxxxxx>
Signed-off-by: Hersen Wu <hersenxs.wu@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 6 ++++
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 16 +++++++-----
2 files changed, 16 insertions(+), 6 deletions(-)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8533,6 +8533,9 @@ static void amdgpu_dm_atomic_commit_tail
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)
@@ -8581,6 +8584,9 @@ static void amdgpu_dm_atomic_commit_tail
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;
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -385,13 +385,17 @@ static int dm_dp_mst_get_modes(struct dr
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];
+ }
}
#endif
Patches currently in stable-queue which might be from hersenxs.wu@xxxxxxx are
queue-6.3/drm-amd-display-fix-access-hdcp_workqueue-assert.patch
queue-6.3/drm-amd-display-return-error-code-on-dsc-atomic-chec.patch
