[PATCH 01/17] drm/amd/display: Do Not Fallback To SW Cursor If HW Cursor Required

[Zaeem Mohamed]

From: Austin Zheng <Austin.Zheng at amd.com>

[Why/How]
Tearing can occur if there is a flip immediate plane and SW cursor.
check_subvp_sw_cursor_fallback_req falls back to SW cursor if the
stream has the potential to use subVP.
Check for fallback not needed if HW cursor is required.
e.g. Fullscreen gaming

Reviewed-by: Dillon Varone <dillon.varone at amd.com>
Signed-off-by: Austin Zheng <Austin.Zheng at amd.com>
Signed-off-by: Zaeem Mohamed <zaeem.mohamed at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_stream.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
index b000bf39762f..aca2821d546b 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
@@ -290,7 +290,9 @@ bool dc_stream_set_cursor_attributes(
 	 * 2. If not subvp high refresh, for single display cases, if resolution is >= 5K and refresh rate < 120hz
 	 * 3. If not subvp high refresh, for multi display cases, if resolution is >= 4K and refresh rate < 120hz
 	 */
-	if (dc->debug.allow_sw_cursor_fallback && attributes->height * attributes->width * 4 > 16384) {
+	if (dc->debug.allow_sw_cursor_fallback &&
+		attributes->height * attributes->width * 4 > 16384 &&
+		!stream->hw_cursor_req) {
 		if (check_subvp_sw_cursor_fallback_req(dc, stream))
 			return false;
 	}
-- 
2.34.1