drm/radeon/kms/pm: track current voltage (v2)
track the current voltage level and avoid setting it
if the requested voltage is already set.
v2: check voltage type before checking current voltage
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index 33952da..7bde6ee 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -48,8 +48,13 @@
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);
+
+ if ((voltage->type == VOLTAGE_SW) && voltage->voltage) {
+ if (voltage->voltage != rdev->pm.current_vddc) {
+ radeon_atom_set_voltage(rdev, voltage->voltage);
+ rdev->pm.current_vddc = voltage->voltage;
+ }
+ }
}
/*