drm/amd/display: block MPO if it prevents pstate support

This change adds a method to block mpo when it would cause us to
exit pstate support. We should block mpo by default where MPO
causes issues by preventing pstate change.

Reviewed-by: Jun Lei <[e-mail]>
Reviewed-by: Aric Cyr <[e-mail]>
Acked-by: Wayne Lin <[e-mail]>
Signed-off-by: Dmytro Laktyushkin <[e-mail]>
Tested-by: Daniel Wheeler <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 	edp_link->dc->link_srv->edp_set_panel_power(edp_link, powerOn);
 }
 
+/*
+ *****************************************************************************
+ * dc_get_power_profile_for_dc_state() - extracts power profile from dc state
+ *
+ * Called when DM wants to make power policy decisions based on dc_state
+ *
+ *****************************************************************************
+ */
+struct dc_power_profile dc_get_power_profile_for_dc_state(const struct dc_state *context)
+{
+	struct dc_power_profile profile = { 0 };
+
+	profile.power_level += !context->bw_ctx.bw.dcn.clk.p_state_change_support;
+
+	return profile;
+}
+

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

···
 
 void dc_query_current_properties(struct dc *dc, struct dc_current_properties *properties);
 
+struct dc_power_profile {
+	int power_level; /* Lower is better */
+};
+
+struct dc_power_profile dc_get_power_profile_for_dc_state(const struct dc_state *context);
+
 /* DSC Interfaces */
 #include "dc_dsc.h"
 

drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c

···
 #define DCN3_15_MAX_DET_SIZE 384
 #define DCN3_15_CRB_SEGMENT_SIZE_KB 64
 #define DCN3_15_MAX_DET_SEGS (DCN3_15_MAX_DET_SIZE / DCN3_15_CRB_SEGMENT_SIZE_KB)
-/* Minimum 2 extra segments need to be in compbuf and claimable to guarantee seamless mpo transitions */
-#define MIN_RESERVED_DET_SEGS 2
+/* Minimum 3 extra segments need to be in compbuf and claimable to guarantee seamless mpo transitions */
+#define MIN_RESERVED_DET_SEGS 3
 
 enum dcn31_clk_src_array_id {
 	DCN31_CLK_SRC_PLL0,