drm/radeon/dpm: add a late enable callback

Certain features need to be enabled after ring tests
(e.g., powergating, etc.).  Add a function pointer
to split out late enable features.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 572476b61d89..869465aafbc5 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -252,6 +252,7 @@ struct radeon_clock {
  * Power management
  */
 int radeon_pm_init(struct radeon_device *rdev);
+int radeon_pm_late_init(struct radeon_device *rdev);
 void radeon_pm_fini(struct radeon_device *rdev);
 void radeon_pm_compute_clocks(struct radeon_device *rdev);
 void radeon_pm_suspend(struct radeon_device *rdev);
@@ -1780,6 +1781,7 @@ struct radeon_asic {
                 int (*init)(struct radeon_device *rdev);
                 void (*setup_asic)(struct radeon_device *rdev);
                 int (*enable)(struct radeon_device *rdev);
+                int (*late_enable)(struct radeon_device *rdev);
                 void (*disable)(struct radeon_device *rdev);
                 int (*pre_set_power_state)(struct radeon_device *rdev);
                 int (*set_power_state)(struct radeon_device *rdev);
@@ -2655,6 +2657,7 @@ void radeon_ring_write(struct radeon_ring *ring, uint32_t v);
 #define radeon_dpm_init(rdev) rdev->asic->dpm.init((rdev))
 #define radeon_dpm_setup_asic(rdev) rdev->asic->dpm.setup_asic((rdev))
 #define radeon_dpm_enable(rdev) rdev->asic->dpm.enable((rdev))
+#define radeon_dpm_late_enable(rdev) rdev->asic->dpm.late_enable((rdev))
 #define radeon_dpm_disable(rdev) rdev->asic->dpm.disable((rdev))
 #define radeon_dpm_pre_set_power_state(rdev) rdev->asic->dpm.pre_set_power_state((rdev))
 #define radeon_dpm_set_power_state(rdev) rdev->asic->dpm.set_power_state((rdev))
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 384758d011e4..d4e5bcfeb77d 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -1288,6 +1288,18 @@ int radeon_pm_init(struct radeon_device *rdev)
                 return radeon_pm_init_old(rdev);
 }
 
+int radeon_pm_late_init(struct radeon_device *rdev)
+{
+        int ret = 0;
+
+        if (rdev->pm.pm_method == PM_METHOD_DPM) {
+                mutex_lock(&rdev->pm.mutex);
+                ret = radeon_dpm_late_enable(rdev);
+                mutex_unlock(&rdev->pm.mutex);
+        }
+        return ret;
+}
+
 static void radeon_pm_fini_old(struct radeon_device *rdev)
 {
         if (rdev->pm.num_power_states > 1) {