[PATCH] drm/amd/display: fix cursor black issue

[tiancyin]

[Why]
the member sdr_white_level of struct dc_cursor_attributes was not
initialized, then the random value result that
dcn10_set_cursor_sdr_white_level() set error hw_scale value 0x20D9(normal
value is 0x3c00), this cause the black cursor issue.

[how]
just initilize the obj of struct dc_cursor_attributes to zero to avoid
the random value.

Change-Id: I07a53a48a33940cfb6006ed3738583f9703c7993
Signed-off-by: Tianci Yin <tianci.yin at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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 744acd8..0343ff1 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5062,7 +5062,7 @@ static void handle_cursor_update(struct drm_plane *plane,
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 	uint64_t address = afb ? afb->address : 0;
 	struct dc_cursor_position position;
-	struct dc_cursor_attributes attributes;
+	struct dc_cursor_attributes attributes = {0};
 	int ret;
 
 	if (!plane->state->fb && !old_plane_state->fb)
-- 
2.7.4