drm/radeon/kms/pm: Disable voltage adjust on RS780/RS880
The vddc value in the power tables is not an actual voltage
like on discrete r6xx/r7xx/evergreen systems, but instead has
a symbolic meaning (e.g., NONE, LOW, HIGH, etc.). See atombios.h
Most RS780/RS880 vbioses don't have a SetVoltage table anyway,
so it shouldn't be doing anything to the hardware at the moment.
I need to figure out how voltage is supposed to work on the newer
IGPs; until then, disable it.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 4305cd5..f0fcd6c 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1833,10 +1833,7 @@
/* skip invalid modes */
if (rdev->pm.power_state[state_index].clock_info[mode_index].sclk == 0)
continue;
- rdev->pm.power_state[state_index].clock_info[mode_index].voltage.type =
- VOLTAGE_SW;
- rdev->pm.power_state[state_index].clock_info[mode_index].voltage.voltage =
- clock_info->usVDDC;
+ /* voltage works differently on IGPs */
mode_index++;
} else if (ASIC_IS_DCE4(rdev)) {
struct _ATOM_PPLIB_EVERGREEN_CLOCK_INFO *clock_info =