drm/radeon: fix multi-head power profile stability on BTC+ asics

vddci needs to track mclk for multi-head.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 2916de8..3c38ea4 100644 (file)
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -403,6 +403,19 @@ void evergreen_pm_misc(struct radeon_device *rdev)
                        rdev->pm.current_vddc = voltage->voltage;
                        DRM_DEBUG("Setting: vddc: %d\n", voltage->voltage);
                }
+
+               /* starting with BTC, there is one state that is used for both
+                * MH and SH.  Difference is that we always use the high clock index for
+                * mclk and vddci.
+                */
+               if ((rdev->pm.pm_method == PM_METHOD_PROFILE) &&
+                   (rdev->family >= CHIP_BARTS) &&
+                   rdev->pm.active_crtc_count &&
+                   ((rdev->pm.profile_index == PM_PROFILE_MID_MH_IDX) ||
+                    (rdev->pm.profile_index == PM_PROFILE_LOW_MH_IDX)))
+                       voltage = &rdev->pm.power_state[req_ps_idx].
+                               clock_info[rdev->pm.profiles[PM_PROFILE_HIGH_MH_IDX].dpms_on_cm_idx].voltage;
+
                /* 0xff01 is a flag rather then an actual voltage */
                if (voltage->vddci == 0xff01)
                        return;

diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 0bfa656..338fd6a 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -169,7 +169,7 @@ static void radeon_set_power_state(struct radeon_device *rdev)
 
                /* starting with BTC, there is one state that is used for both
                 * MH and SH.  Difference is that we always use the high clock index for
-                * mclk.
+                * mclk and vddci.
                 */
                if ((rdev->pm.pm_method == PM_METHOD_PROFILE) &&
                    (rdev->family >= CHIP_BARTS) &&