drm/radeon/kms/pm: add support for SetVoltage cmd table (V2)

- This enables voltage adjustment on r6xx+ and certain
r5xx asics.
- Voltage drop support is already available for most
r1xx-r5xx asics.

V2: endian fix for voltage table.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 44e96a2ae25a..e14f59748e65 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -475,6 +475,12 @@ void r600_pm_init_profile(struct radeon_device *rdev)
 
 void r600_pm_misc(struct radeon_device *rdev)
 {
+        int requested_index = rdev->pm.requested_power_state_index;
+        struct radeon_power_state *ps = &rdev->pm.power_state[requested_index];
+        struct radeon_voltage *voltage = &ps->clock_info[0].voltage;
+
+        if ((voltage->type == VOLTAGE_SW) && voltage->voltage)
+                radeon_atom_set_voltage(rdev, voltage->voltage);
 
 }