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Commit aa1df0f2 authored by Alex Deucher's avatar Alex Deucher Committed by Dave Airlie
Browse files

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: default avatarAlex Deucher <alexdeucher@gmail.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent cbd4623d

drivers/gpu/drm/radeon/radeon_atombios.c

+1 −4
Original line number Diff line number Diff line
@@ -1833,10 +1833,7 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev) 
						/* 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 =