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drm/i915: Enable HDMI on DDI-E 

DDI-E doesn't have the correspondent GMBUS pin.

We rely on VBT to tell us which one it being used instead.

The DVI/HDMI on shared port couldn't exist.

This patch isn't tested without hardware wchich has HDMI
on DDI-E.

v2: fix trailing whitespace
v3: MISSING_CASE take place of BUG()

Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Xiong Zhang 2015-08-17 16:04:04 +08:00 committed by Jani Nikula
parent 54875571bb
commit 11c1b657c4
3 changed files with 47 additions and 4 deletions
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5
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1416,6 +1416,10 @@ enum modeset_restore {
#define DP_AUX_C 0x20
#define DP_AUX_D 0x30
#define DDC_PIN_B 0x05
#define DDC_PIN_C 0x04
#define DDC_PIN_D 0x06
struct ddi_vbt_port_info {
/*
* This is an index in the HDMI/DVI DDI buffer translation table.
@ -1430,6 +1434,7 @@ struct ddi_vbt_port_info {
uint8_t supports_dp:1;
uint8_t alternate_aux_channel;
uint8_t alternate_ddc_pin;
uint8_t dp_boost_level;
uint8_t hdmi_boost_level;

25
drivers/gpu/drm/i915/intel_bios.c
View File

@ -905,7 +905,7 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
uint8_t hdmi_level_shift;
int i, j;
bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
uint8_t aux_channel;
uint8_t aux_channel, ddc_pin;
/* Each DDI port can have more than one value on the "DVO Port" field,
* so look for all the possible values for each port and abort if more
* than one is found. */
@ -939,6 +939,7 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
return;
aux_channel = child->raw[25];
ddc_pin = child->common.ddc_pin;
is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
@ -970,11 +971,27 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
if (is_dvi) {
if (child->common.ddc_pin == 0x05 && port != PORT_B)
if (port == PORT_E) {
info->alternate_ddc_pin = ddc_pin;
/* if DDIE share ddc pin with other port, then
* dvi/hdmi couldn't exist on the shared port.
* Otherwise they share the same ddc bin and system
* couldn't communicate with them seperately. */
if (ddc_pin == DDC_PIN_B) {
dev_priv->vbt.ddi_port_info[PORT_B].supports_dvi = 0;
dev_priv->vbt.ddi_port_info[PORT_B].supports_hdmi = 0;
} else if (ddc_pin == DDC_PIN_C) {
dev_priv->vbt.ddi_port_info[PORT_C].supports_dvi = 0;
dev_priv->vbt.ddi_port_info[PORT_C].supports_hdmi = 0;
} else if (ddc_pin == DDC_PIN_D) {
dev_priv->vbt.ddi_port_info[PORT_D].supports_dvi = 0;
dev_priv->vbt.ddi_port_info[PORT_D].supports_hdmi = 0;
}
} else if (ddc_pin == DDC_PIN_B && port != PORT_B)
DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
if (child->common.ddc_pin == 0x04 && port != PORT_C)
else if (ddc_pin == DDC_PIN_C && port != PORT_C)
DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
if (child->common.ddc_pin == 0x06 && port != PORT_D)
else if (ddc_pin == DDC_PIN_D && port != PORT_D)
DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
}

21
drivers/gpu/drm/i915/intel_hdmi.c
View File

@ -1958,6 +1958,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
struct drm_device *dev = intel_encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
enum port port = intel_dig_port->port;
uint8_t alternate_ddc_pin;
drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
DRM_MODE_CONNECTOR_HDMIA);
@ -1991,6 +1992,26 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
intel_hdmi->ddc_bus = GMBUS_PIN_DPD;
intel_encoder->hpd_pin = HPD_PORT_D;
break;
case PORT_E:
/* On SKL PORT E doesn't have seperate GMBUS pin
* We rely on VBT to set a proper alternate GMBUS pin. */
alternate_ddc_pin =
dev_priv->vbt.ddi_port_info[PORT_E].alternate_ddc_pin;
switch (alternate_ddc_pin) {
case DDC_PIN_B:
intel_hdmi->ddc_bus = GMBUS_PIN_DPB;
break;
case DDC_PIN_C:
intel_hdmi->ddc_bus = GMBUS_PIN_DPC;
break;
case DDC_PIN_D:
intel_hdmi->ddc_bus = GMBUS_PIN_DPD;
break;
default:
MISSING_CASE(alternate_ddc_pin);
}
intel_encoder->hpd_pin = HPD_PORT_E;
break;
case PORT_A:
intel_encoder->hpd_pin = HPD_PORT_A;
/* Internal port only for eDP. */