[Bug 2116908] Re: [AMDGPU] Call trace occurs when unplugging a HDMI/DP/VGA cable on Dell platforms

** Description changed:

[Impact]
On Dell platforms using either Linux 6.11.0-1021-oem or 6.14.0-1005-oem, we observed call traces when unplugging a HDMI/DP/VGA cable from an external monitor.

[Fix]
============= Noble OEM 6.14 ================================================
Apply the following patch from the mailing list amd-gfx@lists.freedesktop.org fixes the issue:

- [PATCH 06/18] drm/amd/display: limit clear_update_flags to dcn32 and
above

While the patch is still under review, an SRU is required out of
urgency.

Link: https://lore.kernel.org/amd-
gfx/20250710212941.630259-7-IVAN.LIPSKI@amd.com/

============== Plucky and Questing ==========================================
- Cherry-pick the following patch from the mainline:
+ 1. Cherry-pick the following patch from the mainline:

f354556e29f4 drm/amd/display: limit clear_update_flags to dcn32 and
above

Here is the reference for the full patchset:

Link: https://lore.kernel.org/amd-
gfx/20250710212941.630259-7-IVAN.LIPSKI@amd.com/

+ 2. Cherry-pick the other patch, which fixes the patch above:
+
+ 2d418e4fd9f1 drm/amd/display: Allow DCN301 to clear update flags
+
+
[Test Plan]
1. Boot into an Ubuntu OS
2. Connect a HDMI/DP/VGA cable into an external monitor
3. Check whether a call trace appears

[Where problems could occur]
This patch changes the behavior of AMD GPUs with DCN version lower than 3.2. It might cause regression on these GPUs.

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https://bugs.launchpad.net/bugs/2116908

Title:
[AMDGPU] Call trace occurs when unplugging a HDMI/DP/VGA cable on Dell
platforms

Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-6.14 package in Ubuntu:
Invalid
Status in The Noble Numbat:
Invalid
Status in linux source package in Noble:
Won't Fix
Status in linux-oem-6.14 source package in Noble:
Fix Released
Status in The Plucky Puffin:
New
Status in linux source package in Plucky:
In Progress
Status in linux-oem-6.14 source package in Plucky:
Invalid
Status in The Questing Quokka:
New
Status in linux source package in Questing:
In Progress
Status in linux-oem-6.14 source package in Questing:
Invalid

Bug description:
[Impact]
On Dell platforms using either Linux 6.11.0-1021-oem or 6.14.0-1005-oem, we observed call traces when unplugging a HDMI/DP/VGA cable from an external monitor.

[Fix]
============= Noble OEM 6.14 ================================================
Apply the following patch from the mailing list amd-gfx@lists.freedesktop.org fixes the issue:

- [PATCH 06/18] drm/amd/display: limit clear_update_flags to dcn32 and
above

While the patch is still under review, an SRU is required out of
urgency.

Link: https://lore.kernel.org/amd-
gfx/20250710212941.630259-7-IVAN.LIPSKI@amd.com/

============== Plucky and Questing ==========================================
1. Cherry-pick the following patch from the mainline:

f354556e29f4 drm/amd/display: limit clear_update_flags to dcn32 and
above

Here is the reference for the full patchset:

Link: https://lore.kernel.org/amd-
gfx/20250710212941.630259-7-IVAN.LIPSKI@amd.com/

2. Cherry-pick the other patch, which fixes the patch above:

2d418e4fd9f1 drm/amd/display: Allow DCN301 to clear update flags


[Test Plan]
1. Boot into an Ubuntu OS
2. Connect a HDMI/DP/VGA cable into an external monitor
3. Check whether a call trace appears

[Where problems could occur]
This patch changes the behavior of AMD GPUs with DCN version lower than 3.2. It might cause regression on these GPUs.

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