> -----Original Message----- > From: Vivi, Rodrigo > Sent: Saturday, August 8, 2015 8:34 AM > To: intel-gfx@lists.freedesktop.org > Cc: Vivi, Rodrigo; Zhang, Xiong Y > Subject: [PATCH 7/6] drm/i915/skl: DDI-E and DDI-A shares 4 lanes. > > DDI-A and DDI-E shares the 4 lanes. So when DDI-E is present we need to > configure lane count propperly for both. > > This was based on Sonika's > [PATCH] drm/i915/skl: Select DDIA lane capability based upon vbt > > Credits-to: Sonika Jindal <sonika.jin...@intel.com> > Cc: Xiong Zhang <xiong.y.zh...@intel.com> > Signed-off-by: Rodrigo Vivi <rodrigo.v...@intel.com> > --- > drivers/gpu/drm/i915/intel_ddi.c | 12 ++++++++++-- > drivers/gpu/drm/i915/intel_dp.c | 8 +++++--- > 2 files changed, 15 insertions(+), 5 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_ddi.c > b/drivers/gpu/drm/i915/intel_ddi.c > index 110d546..557cecf 100644 > --- a/drivers/gpu/drm/i915/intel_ddi.c > +++ b/drivers/gpu/drm/i915/intel_ddi.c > @@ -3178,7 +3178,15 @@ void intel_ddi_init(struct drm_device *dev, enum > port port) > struct intel_digital_port *intel_dig_port; > struct intel_encoder *intel_encoder; > struct drm_encoder *encoder; > - bool init_hdmi, init_dp; > + bool init_hdmi, init_dp, ddi_e_present; > + > + /* > + * On SKL we don't have a way to detect DDI-E so we rely on VBT. > + */ > + ddie_present = IS_SKYLAKE(dev) && > + (dev_priv->vbt.ddi_port_info[PORT_E].supports_dp || > + dev_priv->vbt.ddi_port_info[PORT_E].supports_dvi || > + dev_priv->vbt.ddi_port_info[PORT_E].supports_hdmi); [Zhang, Xiong Y] ddie_present should be ddi_e_present > > init_hdmi = (dev_priv->vbt.ddi_port_info[port].supports_dvi || > dev_priv->vbt.ddi_port_info[port].supports_hdmi); > @@ -3210,7 +3218,7 @@ void intel_ddi_init(struct drm_device *dev, enum > port port) > intel_dig_port->port = port; > intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) & > (DDI_BUF_PORT_REVERSAL | > - DDI_A_4_LANES); > + ddi_e_present ? 0 : DDI_A_4_LANES); [Zhang, Xiong Y] Sonika's patch will set DDI-A to 4 lanes when DDI-E doesn't exist, I think your patch will do nothing. > > intel_encoder->type = INTEL_OUTPUT_UNKNOWN; > intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); diff --git > a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index > 3ff2080..7ada79e 100644 > --- a/drivers/gpu/drm/i915/intel_dp.c > +++ b/drivers/gpu/drm/i915/intel_dp.c > @@ -159,9 +159,11 @@ static u8 intel_dp_max_lane_count(struct intel_dp > *intel_dp) > u8 source_max, sink_max; > > source_max = 4; > - if (HAS_DDI(dev) && intel_dig_port->port == PORT_A && > - (intel_dig_port->saved_port_bits & DDI_A_4_LANES) == 0) > - source_max = 2; > + if (HAS_DDI(dev) && (intel_dig_port->port == PORT_E || > + (intel_dig_port->port == PORT_A && > + (intel_dig_port->saved_port_bits & > + DDI_A_4_LANES) == 0)) > + source_max = 2; [Zhang, Xiong Y] it miss ')' at the end line. > > sink_max = drm_dp_max_lane_count(intel_dp->dpcd); > > -- > 2.4.3
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