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drm/i915/bxt: WA for swapped HPD pins in A stepping

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WA for BXT A0/A1, where DDIB's HPD pin is swapped to DDIA, so enabling
DDIA HPD pin in place of DDIB.

v2: For DP, irq_port is used to determine the encoder instead of
hpd_pin and removing the edp HPD logic because port A HPD is not
present(Imre)
v3: Rebased on top of Imre's patchset for enabling HPD on PORT A.
Added hpd_pin swapping for intel_dp_init_connector, setting encoder
for PORT_A as per the WA in irq_port (Imre)
v4: Dont enable interrupt for edp, also reframe the description (Siva)
v5: Don’t check for PORT_A in intel_ddi_init to update dig_port,
instead avoid setting hpd_pin itself (Imre)

Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Reviewed-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Sonika Jindal 2015-08-10 10:35:36 +05:30 committed by Daniel Vetter
parent 7f3561bec7
commit cf1d58833f
3 changed files with 19 additions and 2 deletions
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8
drivers/gpu/drm/i915/intel_ddi.c
View file

@ -3243,6 +3243,14 @@ void intel_ddi_init(struct drm_device *dev, enum port port)
goto err;
intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
/*
* On BXT A0/A1, sw needs to activate DDIA HPD logic and
* interrupts to check the external panel connection.
*/
if (IS_BROXTON(dev_priv) && (INTEL_REVID(dev) < BXT_REVID_B0)
&& port == PORT_B)
dev_priv->hotplug.irq_port[PORT_A] = intel_dig_port;
else
dev_priv->hotplug.irq_port[port] = intel_dig_port;
}

2
drivers/gpu/drm/i915/intel_dp.c
View file

@ -5876,6 +5876,8 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
break;
case PORT_B:
intel_encoder->hpd_pin = HPD_PORT_B;
if (IS_BROXTON(dev_priv) && (INTEL_REVID(dev) < BXT_REVID_B0))
intel_encoder->hpd_pin = HPD_PORT_A;
break;
case PORT_C:
intel_encoder->hpd_pin = HPD_PORT_C;

7
drivers/gpu/drm/i915/intel_hdmi.c
View file

@ -1973,6 +1973,13 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
intel_hdmi->ddc_bus = GMBUS_PIN_1_BXT;
else
intel_hdmi->ddc_bus = GMBUS_PIN_DPB;
/*
* On BXT A0/A1, sw needs to activate DDIA HPD logic and
* interrupts to check the external panel connection.
*/
if (IS_BROXTON(dev_priv) && (INTEL_REVID(dev) < BXT_REVID_B0))
intel_encoder->hpd_pin = HPD_PORT_A;
else
intel_encoder->hpd_pin = HPD_PORT_B;
break;
case PORT_C: