diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_bios.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index 2f434297246e..12e4fd18076d 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -590,6 +590,8 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port, struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port]; uint8_t hdmi_level_shift; int i, j; + bool is_dvi, is_dp; + uint8_t aux_channel; /* 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. */ @@ -622,6 +624,31 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port, if (!child) return; + aux_channel = child->raw[25]; + + is_dvi = child->common.device_type & (1 << 4); + is_dp = child->common.device_type & (1 << 2); + + if (is_dvi) { + if (child->common.ddc_pin == 0x05 && port != PORT_B) + DRM_DEBUG_KMS("Unexpected DDC pin for port B\n"); + if (child->common.ddc_pin == 0x04 && port != PORT_C) + DRM_DEBUG_KMS("Unexpected DDC pin for port C\n"); + if (child->common.ddc_pin == 0x06 && port != PORT_D) + DRM_DEBUG_KMS("Unexpected DDC pin for port D\n"); + } + + if (is_dp) { + if (aux_channel == 0x40 && port != PORT_A) + DRM_DEBUG_KMS("Unexpected AUX channel for port A\n"); + if (aux_channel == 0x10 && port != PORT_B) + DRM_DEBUG_KMS("Unexpected AUX channel for port B\n"); + if (aux_channel == 0x20 && port != PORT_C) + DRM_DEBUG_KMS("Unexpected AUX channel for port C\n"); + if (aux_channel == 0x30 && port != PORT_D) + DRM_DEBUG_KMS("Unexpected AUX channel for port D\n"); + } + if (bdb->version >= 158) { /* The VBT HDMI level shift values match the table we have. */ hdmi_level_shift = child->raw[7] & 0xF; |