Ack: [SRU][Q][PATCH 0/2] https://bugs.launchpad.net/bugs/2136979

[Aaron Ma]

Fix from upstream with proper tests.

Acked-by: Aaron Ma <aaron.ma at canonical.com>

On Fri, Dec 26, 2025 at 2:27 PM AceLan Kao <acelan.kao at canonical.com> wrote:
>
> From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>
>
> BugLink: https://bugs.launchpad.net/bugs/2136979
>
> [Impact]
> When the external monitor is connected to the WD25 dock, the external monitor shows black screen, move the cursor, screen flickers.
>
> [Fix]
> The commit in v6.19-rc1 fixes the issue
> e109f644b871d drm/i915/dp_mst: Disable Panel Replay
>
> To fix the conflict, cherry picked this commit from v6.18-rc1, too
> 9cc10041e9fe7 drm/i915/psr: Check drm_dp_dpcd_read return value on PSR dpcd init
>
> [Test]
> 1. Boot to OS, Connect WD25 Dock and plug a DP/HDMI/MFDP monitor.
> 2. Check external monitor states
>
> [Where problems could occur]
> The drm_dp_dpcd_read() doesn't affect the call path, and disable dp_mst panel replay is reasonable. Both commits look pretty safe to me.
>
> Imre Deak (1):
>   drm/i915/dp_mst: Disable Panel Replay
>
> Jouni Högander (1):
>   drm/i915/psr: Check drm_dp_dpcd_read return value on PSR dpcd init
>
>  drivers/gpu/drm/i915/display/intel_psr.c | 36 ++++++++++++++++--------
>  1 file changed, 25 insertions(+), 11 deletions(-)
>
> --
> 2.43.0
>
>
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