drm/i915: Be extra careful about A/D matching for multifunction SDVO
If we're both RGB and TMDS capable, we'll have set up one connector for
each. When determining connectivity, require analog/digital state in
the EDID block to match analog/digital support in the connector.
Otherwise, both DVI and VGA will appear to be connected.
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 5192723..5ad5a09 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1504,16 +1504,17 @@
}
enum drm_connector_status
-intel_sdvo_hdmi_sink_detect(struct drm_connector *connector, u16 response)
+intel_sdvo_hdmi_sink_detect(struct drm_connector *connector)
{
struct drm_encoder *encoder = intel_attached_encoder(connector);
struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
struct intel_sdvo_priv *sdvo_priv = intel_encoder->dev_priv;
+ struct intel_connector *intel_connector = to_intel_connector(connector);
+ struct intel_sdvo_connector *sdvo_connector = intel_connector->dev_priv;
enum drm_connector_status status = connector_status_connected;
struct edid *edid = NULL;
- edid = drm_get_edid(connector,
- intel_encoder->ddc_bus);
+ edid = drm_get_edid(connector, intel_encoder->ddc_bus);
/* This is only applied to SDVO cards with multiple outputs */
if (edid == NULL && intel_sdvo_multifunc_encoder(intel_encoder)) {
@@ -1526,8 +1527,7 @@
*/
while(temp_ddc > 1) {
sdvo_priv->ddc_bus = temp_ddc;
- edid = drm_get_edid(connector,
- intel_encoder->ddc_bus);
+ edid = drm_get_edid(connector, intel_encoder->ddc_bus);
if (edid) {
/*
* When we can get the EDID, maybe it is the
@@ -1544,28 +1544,25 @@
/* when there is no edid and no monitor is connected with VGA
* port, try to use the CRT ddc to read the EDID for DVI-connector
*/
- if (edid == NULL &&
- sdvo_priv->analog_ddc_bus &&
+ if (edid == NULL && sdvo_priv->analog_ddc_bus &&
!intel_analog_is_connected(connector->dev))
- edid = drm_get_edid(connector,
- sdvo_priv->analog_ddc_bus);
+ edid = drm_get_edid(connector, sdvo_priv->analog_ddc_bus);
+
if (edid != NULL) {
- /* Don't report the output as connected if it's a DVI-I
- * connector with a non-digital EDID coming out.
- */
- if (response & (SDVO_OUTPUT_TMDS0 | SDVO_OUTPUT_TMDS1)) {
- if (edid->input & DRM_EDID_INPUT_DIGITAL)
- sdvo_priv->is_hdmi =
- drm_detect_hdmi_monitor(edid);
- else
- status = connector_status_disconnected;
- }
+ bool is_digital = !!(edid->input & DRM_EDID_INPUT_DIGITAL);
+ bool need_digital = !!(sdvo_connector->output_flag & SDVO_TMDS_MASK);
- kfree(edid);
+ /* DDC bus is shared, match EDID to connector type */
+ if (is_digital && need_digital)
+ sdvo_priv->is_hdmi = drm_detect_hdmi_monitor(edid);
+ else if (is_digital != need_digital)
+ status = connector_status_disconnected;
+
connector->display_info.raw_edid = NULL;
-
- } else if (response & (SDVO_OUTPUT_TMDS0 | SDVO_OUTPUT_TMDS1))
+ } else
status = connector_status_disconnected;
+
+ kfree(edid);
return status;
}
@@ -1601,8 +1598,8 @@
if ((sdvo_connector->output_flag & response) == 0)
ret = connector_status_disconnected;
- else if (response & (SDVO_OUTPUT_TMDS0 | SDVO_OUTPUT_TMDS1))
- ret = intel_sdvo_hdmi_sink_detect(connector, response);
+ else if (response & SDVO_TMDS_MASK)
+ ret = intel_sdvo_hdmi_sink_detect(connector);
else
ret = connector_status_connected;