This is a note to let you know that I've just added the patch titled
Revert "drm/dp: Change AUX DPCD probe address from DPCD_REV to
LANE0_1_STATUS"
to the 6.1-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:
revert-drm-dp-change-aux-dpcd-probe-address-from-dpcd_rev-to-lane0_1_status.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From [email protected] Tue Sep 2 13:50:59 2025
From: Imre Deak <[email protected]>
Date: Thu, 28 Aug 2025 20:49:29 +0300
Subject: Revert "drm/dp: Change AUX DPCD probe address from DPCD_REV to
LANE0_1_STATUS"
To: <[email protected]>
Cc: <[email protected]>, <[email protected]>, Sasha
Levin <[email protected]>
Message-ID: <[email protected]>
From: Imre Deak <[email protected]>
This reverts commit 4f546a77671076a0a49c08b4c6a7d0888d72f7d2 which is
commit a40c5d727b8111b5db424a1e43e14a1dcce1e77f upstream.
The upstream commit a40c5d727b8111b5db424a1e43e14a1dcce1e77f ("drm/dp:
Change AUX DPCD probe address from DPCD_REV to LANE0_1_STATUS") the
reverted commit backported causes a regression, on one eDP panel at
least resulting in display flickering, described in detail at the Link:
below. The issue fixed by the upstream commit will need a different
solution, revert the backport for now.
Cc: [email protected]
Cc: [email protected]
Cc: Sasha Levin <[email protected]>
Link: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/14558
Signed-off-by: Imre Deak <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/display/drm_dp_helper.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/display/drm_dp_helper.c
+++ b/drivers/gpu/drm/display/drm_dp_helper.c
@@ -663,7 +663,7 @@ ssize_t drm_dp_dpcd_read(struct drm_dp_a
* monitor doesn't power down exactly after the throw away read.
*/
if (!aux->is_remote) {
- ret = drm_dp_dpcd_probe(aux, DP_LANE0_1_STATUS);
+ ret = drm_dp_dpcd_probe(aux, DP_DPCD_REV);
if (ret < 0)
return ret;
}
Patches currently in stable-queue which might be from [email protected] are
queue-6.1/revert-drm-dp-change-aux-dpcd-probe-address-from-dpcd_rev-to-lane0_1_status.patch
