drm/amd/display: skip opp blank or unblank if test pattern enabled

[why]
DPG is used to generate both blank and test automation test pattern.
When test automation is running the requested test pattern can be
overriden by the blank or unblank call because it is using the same
hardware.

[how]
When test pattern is requested, skip blank or unblank.

Signed-off-by: Wenjing Liu <[email protected]>
Reviewed-by: Nikola Cornij <[email protected]>
Acked-by: Harry Wentland <[email protected]>
Acked-by: Rodrigo Siqueira <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Wenjing Liu

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c

@@ -945,6 +945,9 @@ void dcn20_blank_pixel_data(
 	int width = stream->timing.h_addressable + stream->timing.h_border_left + stream->timing.h_border_right;
 	int height = stream->timing.v_addressable + stream->timing.v_border_bottom + stream->timing.v_border_top;
 
+	if (stream->link->test_pattern_enabled)
+		return;
+
 	/* get opp dpg blank color */
 	color_space_to_black_color(dc, color_space, &black_color);