drm/i915: use pipe bpp when setting HDMI bpc

The Intel HDMI encoder can support 8bpc or 12bpc.  Set the appropriate
value based on the pipe bpp when configuring the output.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 1b72aa42c2f9..1ed8e6903915 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -131,6 +131,11 @@ static void intel_hdmi_mode_set(struct drm_encoder *encoder,
         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
                 sdvox |= SDVO_HSYNC_ACTIVE_HIGH;
 
+        if (intel_crtc->bpp > 24)
+                sdvox |= COLOR_FORMAT_12bpc;
+        else
+                sdvox |= COLOR_FORMAT_8bpc;
+
         /* Required on CPT */
         if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))
                 sdvox |= HDMI_MODE_SELECT;