[PATCH 1/1] AMDGPU : Fix bug in reporting voltage for CIK

[Sandeep Raghuraman]

On my R9 390, the voltage was reported as a constant 1000 mV. This was due to a bug in smu7_hwmgr.c, in the smu7_read_sensor() function, where some magic constants were used in a condition, to determine whether the voltage should be read from PLANE2_VID or PLANE1_VID. The VDDC mask was incorrectly used, instead of the VDDGFX mask. 

This patch changes the code to use the correct defined constants (and apply the correct bitshift), thus resulting in correct voltage reporting.

Signed-off-by: Sandeep Raghuraman <sandy.8925 at gmail.com>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
index 753cb2cf6b77..2be006dd2eb3 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
@@ -3587,7 +3587,7 @@ static int smu7_read_sensor(struct pp_hwmgr *hwmgr, int idx,
        case AMDGPU_PP_SENSOR_GPU_POWER:
                return smu7_get_gpu_power(hwmgr, (uint32_t *)value);
        case AMDGPU_PP_SENSOR_VDDGFX:
-               if ((data->vr_config & 0xff) == 0x2)
+               if ((data->vr_config & VRCONF_VDDGFX_MASK) == VR_SVI2_PLANE_2<<VRCONF_VDDGFX_SHIFT)
                        val_vid = PHM_READ_INDIRECT_FIELD(hwmgr->device,
                                        CGS_IND_REG__SMC, PWR_SVI2_STATUS, PLANE2_VID);
                else
--