On 07/06/2017 02:08 PM, Rodrigo Vivi wrote:
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@xxxxxxxxx> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_bios.c | 9 +++++++++ 1 file changed, 9 insertions(+) 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; + } +
Reviewed-by: Clinton Taylor <clinton.a.taylor@xxxxxxxxx> -Clint
sanitize_ddc_pin(dev_priv, port); }
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