5.4-stable patches

added patches:
	revert-drm-dp-change-aux-dpcd-probe-address-from-dpcd_rev-to-lane0_1_status.patch

diff --git a/queue-5.4/revert-drm-dp-change-aux-dpcd-probe-address-from-dpcd_rev-to-lane0_1_status.patch b/queue-5.4/revert-drm-dp-change-aux-dpcd-probe-address-from-dpcd_rev-to-lane0_1_status.patch
new file mode 100644 (file)
index 0000000..b29257a
--- /dev/null
+++ b/queue-5.4/revert-drm-dp-change-aux-dpcd-probe-address-from-dpcd_rev-to-lane0_1_status.patch
@@ -0,0 +1,40 @@
+From imre.deak@intel.com  Tue Sep  2 13:42:52 2025
+From: Imre Deak <imre.deak@intel.com>
+Date: Thu, 28 Aug 2025 20:49:26 +0300
+Subject: Revert "drm/dp: Change AUX DPCD probe address from DPCD_REV to LANE0_1_STATUS"
+To: <stable@vger.kernel.org>
+Cc: <intel-gfx@lists.freedesktop.org>, <dri-devel@lists.freedesktop.org>, Sasha Levin <sashal@kernel.org>
+Message-ID: <20250828174932.414566-1-imre.deak@intel.com>
+
+From: Imre Deak <imre.deak@intel.com>
+
+This reverts commit 2402adce8da4e7396b63b5ffa71e1fa16e5fe5c4 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: intel-gfx@lists.freedesktop.org
+Cc: dri-devel@lists.freedesktop.org
+Cc: Sasha Levin <sashal@kernel.org>
+Link: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/14558
+Signed-off-by: Imre Deak <imre.deak@intel.com>
+---
+ drivers/gpu/drm/drm_dp_helper.c |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/gpu/drm/drm_dp_helper.c
++++ b/drivers/gpu/drm/drm_dp_helper.c
+@@ -280,7 +280,7 @@ ssize_t drm_dp_dpcd_read(struct drm_dp_a
+        * We just have to do it before any DPCD access and hope that the
+        * monitor doesn't power down exactly after the throw away read.
+        */
+-      ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_READ, DP_LANE0_1_STATUS, buffer,
++      ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_READ, DP_DPCD_REV, buffer,
+                                1);
+       if (ret != 1)
+               goto out;

diff --git a/queue-5.4/series b/queue-5.4/series
index 8008a7b2e378ade1775c91e9eb32ba539098a60f..84faf570e88b09009b8ce6b29716b29e00124656 100644 (file)
--- a/queue-5.4/series
+++ b/queue-5.4/series
@@ -20,3 +20,4 @@ hid-wacom-add-a-new-art-pen-2.patch
 hid-hid-ntrig-fix-unable-to-handle-page-fault-in-ntrig_report_version.patch
 revert-drm-amdgpu-fix-incorrect-vm-flags-to-map-bo.patch
 net-usb-qmi_wwan-add-telit-cinterion-le910c4-wwx-new-compositions.patch
+revert-drm-dp-change-aux-dpcd-probe-address-from-dpcd_rev-to-lane0_1_status.patch