From aa886a3196bf74330ff8b6db87b9951aaacacd4f Mon Sep 17 00:00:00 2001
From: Leo Li <sunpeng.li@amd.com>
Date: Tue, 30 Aug 2022 16:38:16 -0400
Subject: drm/amd/display: Fix double cursor on non-video RGB MPO
Git-commit: b261509952bc19d1012cf732f853659be6ebc61e
Patch-mainline: v6.0-rc7
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849
[Why]
DC makes use of layer_index (zpos) when picking the HW plane to enable
HW cursor on. However, some compositors will not attach zpos information
to each DRM plane. Consequently, in amdgpu, we default layer_index to 0
and do not update it.
This causes said DC logic to enable HW cursor on all planes of the same
layer_index, which manifests as a double cursor issue if one of the
planes is scaled (and hence scaling the cursor as well).
[How]
Use DRM core helpers to calculate a normalized_zpos value for each
drm_plane_state under each crtc, within the atomic state.
This helper will first consider existing zpos values, and if
identical/unset, fallback to plane ID ordering.
The normalized_zpos is then passed to dc_plane_info during atomic check
for later use by the cursor logic.
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Leo Li <sunpeng.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
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 5140d9c2bf3b..1efe7fa5bc58 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4759,7 +4759,7 @@ fill_dc_plane_info_and_addr(struct amdgpu_device *adev,
plane_info->visible = true;
plane_info->stereo_format = PLANE_STEREO_FORMAT_NONE;
- plane_info->layer_index = 0;
+ plane_info->layer_index = plane_state->normalized_zpos;
ret = fill_plane_color_attributes(plane_state, plane_info->format,
&plane_info->color_space);
@@ -4827,7 +4827,7 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev,
dc_plane_state->global_alpha = plane_info.global_alpha;
dc_plane_state->global_alpha_value = plane_info.global_alpha_value;
dc_plane_state->dcc = plane_info.dcc;
- dc_plane_state->layer_index = plane_info.layer_index; // Always returns 0
+ dc_plane_state->layer_index = plane_info.layer_index;
dc_plane_state->flip_int_enabled = true;
/*
@@ -9485,6 +9485,14 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
}
}
+ /*
+ * DC consults the zpos (layer_index in DC terminology) to determine the
+ * hw plane on which to enable the hw cursor (see
+ * `dcn10_can_pipe_disable_cursor`). By now, all modified planes are in
+ * atomic state, so call drm helper to normalize zpos.
+ */
+ drm_atomic_normalize_zpos(dev, state);
+
/* Remove exiting planes if they are modified */
for_each_oldnew_plane_in_state_reverse(state, plane, old_plane_state, new_plane_state, i) {
ret = dm_update_plane_state(dc, state, plane,
--
2.38.1