[PATCH 7/8] drm/i915/cnl: Fix DDI hdmi level selection.

Rodrigo Vivi
2017-08-29T23:22:37Z

Let's get a proper HDMI DDI entry level for vswing programming
sequences on CNL.

Spec doesn't specify any default for HDMI tables,
so let's pick the last entry as the default for now.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
drivers/gpu/drm/i915/intel_ddi.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 3ce02cbd4483..f1757a8e481a 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -660,7 +660,10 @@ static int intel_ddi_hdmi_level(struct drm_i915_private *dev_priv, enum port por
if (IS_GEN9_LP(dev_priv))
return hdmi_level;

- if (IS_GEN9_BC(dev_priv)) {
+ if (IS_CANNONLAKE(dev_priv)) {
+ cnl_get_buf_trans_hdmi(dev_priv, &n_hdmi_entries);
+ hdmi_default_entry = n_hdmi_entries - 1;
+ } else if (IS_GEN9_BC(dev_priv)) {
skl_get_buf_trans_hdmi(dev_priv, &n_hdmi_entries);
hdmi_default_entry = 8;
} else if (IS_BROADWELL(dev_priv)) {
--
2.13.2