From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Mon, 24 Mar 2025 18:51:15 +0000 (-0700)
Subject: 6.1-stable patches
X-Git-Tag: v6.1.132~23
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=810faa8526221477237d7fa8fb3aca9052dedf85;p=thirdparty%2Fkernel%2Fstable-queue.git

6.1-stable patches

added patches:
	drm-amd-display-use-hw-lock-mgr-for-psr1-when-only-one-edp.patch
---

diff --git a/queue-6.1/drm-amd-display-use-hw-lock-mgr-for-psr1-when-only-one-edp.patch b/queue-6.1/drm-amd-display-use-hw-lock-mgr-for-psr1-when-only-one-edp.patch
new file mode 100644
index 0000000000..5690fddcf2
--- /dev/null
+++ b/queue-6.1/drm-amd-display-use-hw-lock-mgr-for-psr1-when-only-one-edp.patch
@@ -0,0 +1,57 @@
+From acbf16a6ae775b4db86f537448cc466288aa307e Mon Sep 17 00:00:00 2001
+From: Mario Limonciello <mario.limonciello@amd.com>
+Date: Fri, 7 Mar 2025 15:55:20 -0600
+Subject: drm/amd/display: Use HW lock mgr for PSR1 when only one eDP
+
+From: Mario Limonciello <mario.limonciello@amd.com>
+
+commit acbf16a6ae775b4db86f537448cc466288aa307e upstream.
+
+[WHY]
+DMUB locking is important to make sure that registers aren't accessed
+while in PSR.  Previously it was enabled but caused a deadlock in
+situations with multiple eDP panels.
+
+[HOW]
+Detect if multiple eDP panels are in use to decide whether to use
+lock. Refactor the function so that the first check is for PSR-SU
+and then replay is in use to prevent having to look up number
+of eDP panels for those configurations.
+
+Fixes: f245b400a223 ("Revert "drm/amd/display: Use HW lock mgr for PSR1"")
+Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3965
+Reviewed-by: ChiaHsuan Chung <chiahsuan.chung@amd.com>
+Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
+Signed-off-by: Alex Hung <alex.hung@amd.com>
+Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+(cherry picked from commit ed569e1279a3045d6b974226c814e071fa0193a6)
+Cc: stable@vger.kernel.org
+[superm1: Adjust for missing replay support bfeefe6ea5f1,
+          Adjust for dc_get_edp_links not being renamed from get_edp_links()]
+Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c |   12 ++++++++++++
+ 1 file changed, 12 insertions(+)
+
+--- a/drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c
++++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c
+@@ -67,5 +67,17 @@ bool should_use_dmub_lock(struct dc_link
+ {
+ 	if (link->psr_settings.psr_version == DC_PSR_VERSION_SU_1)
+ 		return true;
++
++	/* only use HW lock for PSR1 on single eDP */
++	if (link->psr_settings.psr_version == DC_PSR_VERSION_1) {
++		struct dc_link *edp_links[MAX_NUM_EDP];
++		int edp_num;
++
++		get_edp_links(link->dc, edp_links, &edp_num);
++
++		if (edp_num == 1)
++			return true;
++	}
++
+ 	return false;
+ }
diff --git a/queue-6.1/series b/queue-6.1/series
index 5af33c095b..aae2adae5c 100644
--- a/queue-6.1/series
+++ b/queue-6.1/series
@@ -188,3 +188,4 @@ soc-qcom-pdr-fix-the-potential-deadlock.patch
 drm-radeon-fix-uninitialized-size-issue-in-radeon_vce_cs_parse.patch
 drm-amdgpu-fix-jpeg-video-caps-max-size-for-navi1x-and-raven.patch
 ksmbd-fix-incorrect-validation-for-num_aces-field-of-smb_acl.patch
+drm-amd-display-use-hw-lock-mgr-for-psr1-when-only-one-edp.patch