drm/radeon/kms: fix legacy crtc2 dpms

noticed by Matthijs Kooijman on fdo bug 22140

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

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
index 6f3ff8b84faf..4a5f2d36efe6 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
@@ -292,8 +292,7 @@ void radeon_crtc_dpms(struct drm_crtc *crtc, int mode)
         uint32_t mask;
 
         if (radeon_crtc->crtc_id)
-                mask = (RADEON_CRTC2_EN |
-                        RADEON_CRTC2_DISP_DIS |
+                mask = (RADEON_CRTC2_DISP_DIS |
                         RADEON_CRTC2_VSYNC_DIS |
                         RADEON_CRTC2_HSYNC_DIS |
                         RADEON_CRTC2_DISP_REQ_EN_B);
@@ -305,7 +304,7 @@ void radeon_crtc_dpms(struct drm_crtc *crtc, int mode)
         switch (mode) {
         case DRM_MODE_DPMS_ON:
                 if (radeon_crtc->crtc_id)
-                        WREG32_P(RADEON_CRTC2_GEN_CNTL, RADEON_CRTC2_EN, ~mask);
+                        WREG32_P(RADEON_CRTC2_GEN_CNTL, RADEON_CRTC2_EN, ~(RADEON_CRTC2_EN | mask));
                 else {
                         WREG32_P(RADEON_CRTC_GEN_CNTL, RADEON_CRTC_EN, ~(RADEON_CRTC_EN |
                                                                          RADEON_CRTC_DISP_REQ_EN_B));
@@ -319,7 +318,7 @@ void radeon_crtc_dpms(struct drm_crtc *crtc, int mode)
         case DRM_MODE_DPMS_OFF:
                 drm_vblank_pre_modeset(dev, radeon_crtc->crtc_id);
                 if (radeon_crtc->crtc_id)
-                        WREG32_P(RADEON_CRTC2_GEN_CNTL, mask, ~mask);
+                        WREG32_P(RADEON_CRTC2_GEN_CNTL, mask, ~(RADEON_CRTC2_EN | mask));
                 else {
                         WREG32_P(RADEON_CRTC_GEN_CNTL, RADEON_CRTC_DISP_REQ_EN_B, ~(RADEON_CRTC_EN |
                                                                                     RADEON_CRTC_DISP_REQ_EN_B));