Commit 9d77c95d authored by Tianci Yin's avatar Tianci Yin Committed by Zheng Zengkai
Browse files

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

stable inclusion
from stable-v6.6.3
commit 9a5ae53e0f46ab17176ae8c50de3318be10c00b6
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8LBQP

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9a5ae53e0f46ab17176ae8c50de3318be10c00b6



--------------------------------

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@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: default avatarAurabindo Pillai <aurabindo.pillai@amd.com>
Acked-by: default avatarAlex Hung <alex.hung@amd.com>
Signed-off-by: default avatarTianci Yin <tianci.yin@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent 9f3a9e2a

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+4 −4
Original line number Diff line number Diff line
@@ -9541,14 +9541,14 @@ 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. */