drm/i915: Fix CRC support for DP port D on CHV

Add the missing CRC control register value for DP port D on CHV.
Untested as I don't have a CHV machine with DP on port D.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Add a check to only allow DP D on chv, not vlv.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index d74b62d..0779e7f 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3100,6 +3100,12 @@ static int vlv_pipe_crc_ctl_reg(struct drm_device *dev,
                *val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_DP_C_VLV;
                need_stable_symbols = true;
                break;
+       case INTEL_PIPE_CRC_SOURCE_DP_D:
+               if (!IS_CHERRYVIEW(dev))
+                       return -EINVAL;
+               *val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_DP_D_VLV;
+               need_stable_symbols = true;
+               break;
        case INTEL_PIPE_CRC_SOURCE_NONE:
                *val = 0;
                break;