drm/amd/display: add set ips disable

[How&Why]
Once IPS active, all the DCN resources are
not be allowed to access.
It needs to a function for 3rd party to
on/off IPS.
Reviewed-by: Duncan Ma <duncan.ma@amd.com>
Acked-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Signed-off-by: Chiawen Huang <chiawen.huang@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.c

@@ -5332,6 +5332,16 @@ bool dc_set_replay_allow_active(struct dc *dc, bool active)
 	return true;
 }
 
+/* set IPS disable state */
+bool dc_set_ips_disable(struct dc *dc, unsigned int disable_ips)
+{
+	dc_exit_ips_for_hw_access(dc);
+
+	dc->config.disable_ips = disable_ips;
+
+	return true;
+}
+
 void dc_allow_idle_optimizations_internal(struct dc *dc, bool allow, char const *caller_name)
 {
 	if (dc->debug.disable_idle_power_optimizations)

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

@@ -2468,6 +2468,8 @@ bool dc_set_psr_allow_active(struct dc *dc, bool enable);
 
 bool dc_set_replay_allow_active(struct dc *dc, bool active);
 
+bool dc_set_ips_disable(struct dc *dc, unsigned int disable_ips);
+
 void dc_z10_restore(const struct dc *dc);
 void dc_z10_save_init(struct dc *dc);