drm/i915: add support for DDI-controlled digital outputs

Those are driven by DDIs on Haswell architecture, so we need to keep track
of which DDI is being used on each output.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 8da8dfe1b4fa..3b0cf7197254 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -41,6 +41,7 @@ struct intel_hdmi {
         struct intel_encoder base;
         u32 sdvox_reg;
         int ddc_bus;
+        int ddi_port;
         uint32_t color_range;
         bool has_hdmi_sink;
         bool has_audio;
@@ -661,6 +662,24 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
                 intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
                 intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
                 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
+        } else if (sdvox_reg == DDI_BUF_CTL(PORT_B)) {
+                DRM_DEBUG_DRIVER("LPT: detected output on DDI B\n");
+                intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
+                intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
+                intel_hdmi->ddi_port = PORT_B;
+                dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
+        } else if (sdvox_reg == DDI_BUF_CTL(PORT_C)) {
+                DRM_DEBUG_DRIVER("LPT: detected output on DDI C\n");
+                intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
+                intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
+                intel_hdmi->ddi_port = PORT_C;
+                dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
+        } else if (sdvox_reg == DDI_BUF_CTL(PORT_D)) {
+                DRM_DEBUG_DRIVER("LPT: detected output on DDI D\n");
+                intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
+                intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
+                intel_hdmi->ddi_port = PORT_D;
+                dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
         } else {
                 /* If we got an unknown sdvox_reg, things are pretty much broken
                  * in a way that we should let the kernel know about it */