ACK: [SRU][P][PATCH v2 0/2] Call trace occurs when unplugging a HDMI/DP/VGA cable on Dell platforms

[Anthony Wong]

On Mon, Aug 18, 2025 at 2:53 PM En-Wei Wu <en-wei.wu at canonical.com> wrote:
>
> BugLink: https://bugs.launchpad.net/bugs/2116908
>
> [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]
> 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.
>
> v2: Add fix commit: drm/amd/display: Allow DCN301 to clear update flags
>
> Charlene Liu (1):
>   drm/amd/display: limit clear_update_flags to dcn32 and above
>
> Ivan Lipski (1):
>   drm/amd/display: Allow DCN301 to clear update flags
>
>  drivers/gpu/drm/amd/display/dc/core/dc.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> --
> 2.43.0

Acked-by: Anthony Wong <anthony.wong at canonical.com>