drm/radeon/kms/pm: add mid profile

This adds an additional profile, mid, to the pm profile
code which takes the place of the old low profile.  The default
behavior remains the same, e.g., auto profile now selects between
mid and high profiles based on power source, however, you can now
manually force the low profile which was previously only available
as a dpms off state.  Enabling the low profile when the displays
are on has been known to cause display corruption in some cases.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 62e7f967c6c4..fcdf1db1e3ce 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -84,9 +84,9 @@ static void radeon_pm_update_profile(struct radeon_device *rdev)
                                 rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
                 } else {
                         if (rdev->pm.active_crtc_count > 1)
-                                rdev->pm.profile_index = PM_PROFILE_LOW_MH_IDX;
+                                rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
                         else
-                                rdev->pm.profile_index = PM_PROFILE_LOW_SH_IDX;
+                                rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
                 }
                 break;
         case PM_PROFILE_LOW:
@@ -95,6 +95,12 @@ static void radeon_pm_update_profile(struct radeon_device *rdev)
                 else
                         rdev->pm.profile_index = PM_PROFILE_LOW_SH_IDX;
                 break;
+        case PM_PROFILE_MID:
+                if (rdev->pm.active_crtc_count > 1)
+                        rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
+                else
+                        rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
+                break;
         case PM_PROFILE_HIGH:
                 if (rdev->pm.active_crtc_count > 1)
                         rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
@@ -302,6 +308,8 @@ static ssize_t radeon_set_pm_profile(struct device *dev,
                         rdev->pm.profile = PM_PROFILE_AUTO;
                 else if (strncmp("low", buf, strlen("low")) == 0)
                         rdev->pm.profile = PM_PROFILE_LOW;
+                else if (strncmp("mid", buf, strlen("mid")) == 0)
+                        rdev->pm.profile = PM_PROFILE_MID;
                 else if (strncmp("high", buf, strlen("high")) == 0)
                         rdev->pm.profile = PM_PROFILE_HIGH;
                 else {