drm/radeon/dpm: fixup dynamic state adjust for sumo

Use a dedicated copy of the current power state since
we may have to adjust it on the fly.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon.h

@@ -1289,6 +1289,7 @@ struct radeon_dpm {
 	struct radeon_ps        *boot_ps;
 	/* default uvd power state */
 	struct radeon_ps        *uvd_ps;
+	struct radeon_ps        hw_ps;
 	enum radeon_pm_state_type state;
 	enum radeon_pm_state_type user_state;
 	u32                     platform_caps;

drivers/gpu/drm/radeon/radeon_pm.c

@@ -684,6 +684,17 @@ static struct radeon_ps *radeon_dpm_pick_power_state(struct radeon_device *rdev,
 	return NULL;
 }
 
+static void radeon_dpm_update_requested_ps(struct radeon_device *rdev,
+					   struct radeon_ps *ps)
+{
+	/* copy the ps to the hw ps and point the requested ps
+	 * at the hw state in case the driver wants to modify
+	 * the state dynamically.
+	 */
+	rdev->pm.dpm.hw_ps = *ps;
+	rdev->pm.dpm.requested_ps = &rdev->pm.dpm.hw_ps;
+}
+
 static void radeon_dpm_change_power_state_locked(struct radeon_device *rdev)
 {
 	int i;
@@ -704,7 +715,7 @@ static void radeon_dpm_change_power_state_locked(struct radeon_device *rdev)
 
 	ps = radeon_dpm_pick_power_state(rdev, dpm_state);
 	if (ps)
-		rdev->pm.dpm.requested_ps = ps;
+		radeon_dpm_update_requested_ps(rdev, ps);
 	else
 		return;
 

drivers/gpu/drm/radeon/sumo_dpm.c

@@ -1072,6 +1072,11 @@ static void sumo_apply_state_adjust_rules(struct radeon_device *rdev)
 	u32 sclk_in_sr = pi->sys_info.min_sclk; /* ??? */
 	u32 i;
 
+	/* point to the hw copy since this function will modify the ps */
+	pi->hw_ps = *ps;
+	rdev->pm.dpm.hw_ps.ps_priv = &pi->hw_ps;
+	ps = &pi->hw_ps;
+
 	if (rps->class & ATOM_PPLIB_CLASSIFICATION_THERMAL)
 		return sumo_patch_thermal_state(rdev, ps, current_ps);
 

drivers/gpu/drm/radeon/sumo_dpm.h

@@ -129,6 +129,7 @@ struct sumo_power_info {
 	bool enable_dynamic_patch_ps;
 	bool enable_dpm;
 	bool enable_boost;
+	struct sumo_ps hw_ps;
 };
 
 #define SUMO_UTC_DFLT_00                     0x48