drm/amd/display: Add debug option for exiting idle optimizations on cursor updates

[Description]
- Have option to exit idle opt on cursor updates
for debug and optimizations purposes
Reviewed-by: Samson Tam <Samson.Tam@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_stream.c

@@ -389,7 +389,7 @@ bool dc_stream_set_cursor_position(
 	struct dc_stream_state *stream,
 	const struct dc_cursor_position *position)
 {
-	struct dc  *dc;
+	struct dc  *dc = stream->ctx->dc;
 	bool reset_idle_optimizations = false;
 
 	if (NULL == stream) {
@@ -406,7 +406,8 @@ bool dc_stream_set_cursor_position(
 	dc_z10_restore(dc);
 
 	/* disable idle optimizations if enabling cursor */
-	if (dc->idle_optimizations_allowed && !stream->cursor_position.enable && position->enable) {
+	if (dc->idle_optimizations_allowed && (!stream->cursor_position.enable || dc->debug.exit_idle_opt_for_cursor_updates)
+			&& position->enable) {
 		dc_allow_idle_optimizations(dc, false);
 		reset_idle_optimizations = true;
 	}

drivers/gpu/drm/amd/display/dc/dc.h

@@ -748,6 +748,7 @@ struct dc_debug_options {
 	uint8_t psr_power_use_phy_fsm;
 	enum dml_hostvm_override_opts dml_hostvm_override;
 	bool use_legacy_soc_bb_mechanism;
+	bool exit_idle_opt_for_cursor_updates;
 };
 
 struct gpu_info_soc_bounding_box_v1_0;