Patch "drm/amd/display: Enable fast plane updates on DCN3.2 and above" has been added to the 6.5-stable tree

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This is a note to let you know that I've just added the patch titled

    drm/amd/display: Enable fast plane updates on DCN3.2 and above

to the 6.5-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:
     drm-amd-display-enable-fast-plane-updates-on-dcn3.2-and-above.patch
and it can be found in the queue-6.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 435f5b369657cffee4b04db1f5805b48599f4dbe Mon Sep 17 00:00:00 2001
From: Tianci Yin <tianci.yin@xxxxxxx>
Date: Wed, 1 Nov 2023 09:47:13 +0800
Subject: drm/amd/display: Enable fast plane updates on DCN3.2 and above

From: Tianci Yin <tianci.yin@xxxxxxx>

commit 435f5b369657cffee4b04db1f5805b48599f4dbe upstream.

[WHY]
When cursor moves across screen boarder, lag cursor observed,
since subvp settings need to sync up with vblank that causes
cursor updates being delayed.

[HOW]
Enable fast plane updates on DCN3.2 to fix it.

Cc: Mario Limonciello <mario.limonciello@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
Acked-by: Alex Hung <alex.hung@xxxxxxx>
Signed-off-by: Tianci Yin <tianci.yin@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -9507,14 +9507,14 @@ static bool should_reset_plane(struct dr
 	struct drm_plane *other;
 	struct drm_plane_state *old_other_state, *new_other_state;
 	struct drm_crtc_state *new_crtc_state;
+	struct amdgpu_device *adev = drm_to_adev(plane->dev);
 	int i;
 
 	/*
-	 * TODO: Remove this hack once the checks below are sufficient
-	 * enough to determine when we need to reset all the planes on
-	 * the stream.
+	 * TODO: Remove this hack for all asics once it proves that the
+	 * fast updates works fine on DCN3.2+.
 	 */
-	if (state->allow_modeset)
+	if (adev->ip_versions[DCE_HWIP][0] < IP_VERSION(3, 2, 0) && state->allow_modeset)
 		return true;
 
 	/* Exit early if we know that we're adding or removing the plane. */


Patches currently in stable-queue which might be from tianci.yin@xxxxxxx are

queue-6.5/drm-amd-display-enable-fast-plane-updates-on-dcn3.2-and-above.patch



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