drm/i915: fix TV mode setting in property change

Only set TV DAC in property change seems doesn't work, we have to
setup whole crtc pipe which assigned to TV alone.

Signed-off-by: Zhenyu Wang <zhenyu.z.wang@intel.com>
[anholt: Note that this should also fix the oops at startup with new 2D]
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index 5d9ca779ce25..d2c32983242d 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1570,6 +1570,8 @@ intel_tv_set_property(struct drm_connector *connector, struct drm_property *prop
         struct drm_device *dev = connector->dev;
         struct intel_output *intel_output = to_intel_output(connector);
         struct intel_tv_priv *tv_priv = intel_output->dev_priv;
+        struct drm_encoder *encoder = &intel_output->enc;
+        struct drm_crtc *crtc = encoder->crtc;
         int ret = 0;
         bool changed = false;
 
@@ -1608,8 +1610,9 @@ intel_tv_set_property(struct drm_connector *connector, struct drm_property *prop
                 goto out;
         }
 
-        if (changed)
-                intel_tv_mode_set(&intel_output->enc, NULL, NULL);
+        if (changed && crtc)
+                drm_crtc_helper_set_mode(crtc, &crtc->mode, crtc->x,
+                                crtc->y, crtc->fb);
 out:
         return ret;
 }