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

[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@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Tianci Yin <tianci.yin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 5ec7acf65ee1ca90eb3669524b9c38e7d765e2ae..9581510d374011e69832c22ec86de1834307f6e7 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -9606,14 +9606,14 @@ static bool should_reset_plane(struct drm_atomic_state *state,
        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. */