drm/i915: sync hdmi detection by hdmi identifier with 2D

Currently we detect HDMI monitor by hardware detection, but if an HDMI-DVI
adapter is used to connect a DVI monitor, hardware detection will incorrectly
take monitor as HDMI. HDMI spec says any device containing IEEE registration
identifier will be treated as HDMI device.  The patch intends to detect HDMI
monitor by drm_detect_hdmi_monitor function which follows that rule.

Signed-off-by: Ma Ling <ling.ma@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index b06a4a3ff08db3ca0c9117dacddd35d43ebb8577..550374225388b11834963e104c432ba01e63cc6f 100644 (file)
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -38,7 +38,7 @@
 struct intel_hdmi_priv {
        u32 sdvox_reg;
        u32 save_SDVOX;
-       int has_hdmi_sink;
+       bool has_hdmi_sink;
 };
 
 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
@@ -128,6 +128,22 @@ static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
        return true;
 }
 
+static void
+intel_hdmi_sink_detect(struct drm_connector *connector)
+{
+       struct intel_output *intel_output = to_intel_output(connector);
+       struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
+       struct edid *edid = NULL;
+
+       edid = drm_get_edid(&intel_output->base,
+                           &intel_output->ddc_bus->adapter);
+       if (edid != NULL) {
+               hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
+               kfree(edid);
+               intel_output->base.display_info.raw_edid = NULL;
+       }
+}
+
 static enum drm_connector_status
 intel_hdmi_detect(struct drm_connector *connector)
 {
@@ -158,9 +174,10 @@ intel_hdmi_detect(struct drm_connector *connector)
                return connector_status_unknown;
        }
 
-       if ((I915_READ(PORT_HOTPLUG_STAT) & bit) != 0)
+       if ((I915_READ(PORT_HOTPLUG_STAT) & bit) != 0) {
+               intel_hdmi_sink_detect(connector);
                return connector_status_connected;
-       else
+       } else
                return connector_status_disconnected;
 }
 

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 7b31f55f55c8a9f3b8be5b9eca246bc1ab26075d..9913651c1e1703d78dba7eb34ab3fdd82135a3e3 100644 (file)
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1357,6 +1357,23 @@ void intel_sdvo_set_hotplug(struct drm_connector *connector, int on)
        intel_sdvo_read_response(intel_output, &response, 2);
 }
 
+static void
+intel_sdvo_hdmi_sink_detect(struct drm_connector *connector)
+{
+       struct intel_output *intel_output = to_intel_output(connector);
+       struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
+       struct edid *edid = NULL;
+
+       intel_sdvo_set_control_bus_switch(intel_output, sdvo_priv->ddc_bus);
+       edid = drm_get_edid(&intel_output->base,
+                           &intel_output->ddc_bus->adapter);
+       if (edid != NULL) {
+               sdvo_priv->is_hdmi = drm_detect_hdmi_monitor(edid);
+               kfree(edid);
+               intel_output->base.display_info.raw_edid = NULL;
+       }
+}
+
 static enum drm_connector_status intel_sdvo_detect(struct drm_connector *connector)
 {
        u8 response[2];
@@ -1371,9 +1388,10 @@ static enum drm_connector_status intel_sdvo_detect(struct drm_connector *connect
        if (status != SDVO_CMD_STATUS_SUCCESS)
                return connector_status_unknown;
 
-       if ((response[0] != 0) || (response[1] != 0))
+       if ((response[0] != 0) || (response[1] != 0)) {
+               intel_sdvo_hdmi_sink_detect(connector);
                return connector_status_connected;
-       else
+       } else
                return connector_status_disconnected;
 }