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drm/amd/display: Write to correct dirty_rect

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commit 751281c55579f0cb0e56c9797d4663f689909681 upstream.

When FB_DAMAGE_CLIPS are provided in a non-MPO scenario, the loop does
not use the counter i. This causes the fill_dc_dity_rect() to always
fill dirty_rects[0], causing graphical artifacts when a damage clip
aware DRM client sends more than 1 damage clip.

Instead, use the flip_addrs->dirty_rect_count which is incremented by
fill_dc_dirty_rect() on a successful fill.

Fixes: 30ebe41582d1 ("drm/amd/display: add FB_DAMAGE_CLIPS support")
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/2453
Signed-off-by: Benjamin Cheng <ben@bcheng.me>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.1.x
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Benjamin Cheng 2023-03-12 20:47:39 -04:00 • committed by Greg Kroah-Hartman
parent d58fb94f24
commit d701687c89
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -5023,9 +5023,9 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
for (; flip_addrs->dirty_rect_count < num_clips; clips++)
fill_dc_dirty_rect(new_plane_state->plane,
&dirty_rects[i], clips->x1,
clips->y1, clips->x2 - clips->x1,
clips->y2 - clips->y1,
&dirty_rects[flip_addrs->dirty_rect_count],
clips->x1, clips->y1,
clips->x2 - clips->x1, clips->y2 - clips->y1,
&flip_addrs->dirty_rect_count,
false);
return;