diff options
| author | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2017-07-06 14:08:15 -0700 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2017-07-07 09:11:46 -0700 |
| commit | 75be7756bc21ac1f9f3082850deff809ac3c5d0c (patch) | |
| tree | 73b3ecb293cf2988292e4fe6d006ada06cf91165 | |
| parent | 17369ba08c065967b7b8c48253f20b73acc0b9f5 (diff) | |
| download | op-kernel-dev-75be7756bc21ac1f9f3082850deff809ac3c5d0c.zip op-kernel-dev-75be7756bc21ac1f9f3082850deff809ac3c5d0c.tar.gz | |
drm/i915/cnl: Don't trust VBT's alternate pin for port D for now.
Cannon Lake's VBT that is currently available for B0 stepping
states that port D uses alternate pin 3 messing up with the
default pin-port mapping table. Using that information we cannot
get HDMI working properly. So for now we don't relly on VBT for
this information.
Cc: Clint Taylor <clinton.a.taylor@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Clinton Taylor <clinton.a.taylor@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1499375295-6454-1-git-send-email-rodrigo.vivi@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/intel_bios.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index 639d45c..82b144c 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -1187,6 +1187,15 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port, if (is_dvi) { info->alternate_ddc_pin = ddc_pin; + /* + * All VBTs that we got so far for B Stepping has this + * information wrong for Port D. So, let's just ignore for now. + */ + if (IS_CNL_REVID(dev_priv, CNL_REVID_B0, CNL_REVID_B0) && + port == PORT_D) { + info->alternate_ddc_pin = 0; + } + sanitize_ddc_pin(dev_priv, port); } |
