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drm/i915/sdvo: Tidy intel_sdvo_hdmi_sink_detect

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-09-14 17:58:19 +01:00
parent 2b6efaa476
commit 9d1a903d4b
1 changed files with 24 additions and 31 deletions
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55
drivers/gpu/drm/i915/intel_sdvo.c
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@ -1417,60 +1417,53 @@ enum drm_connector_status
intel_sdvo_hdmi_sink_detect(struct drm_connector *connector)
{
struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);
struct intel_sdvo_connector *intel_sdvo_connector = to_intel_sdvo_connector(connector);
enum drm_connector_status status = connector_status_connected;
struct edid *edid = NULL;
enum drm_connector_status status;
struct edid *edid;
edid = drm_get_edid(connector, intel_sdvo->base.ddc_bus);
/* This is only applied to SDVO cards with multiple outputs */
if (edid == NULL && intel_sdvo_multifunc_encoder(intel_sdvo)) {
uint8_t saved_ddc, temp_ddc;
saved_ddc = intel_sdvo->ddc_bus;
temp_ddc = intel_sdvo->ddc_bus >> 1;
u8 saved_ddc = intel_sdvo->ddc_bus, ddc;
/*
* Don't use the 1 as the argument of DDC bus switch to get
* the EDID. It is used for SDVO SPD ROM.
*/
while(temp_ddc > 1) {
intel_sdvo->ddc_bus = temp_ddc;
for (ddc = intel_sdvo->ddc_bus >> 1; ddc > 1; ddc >>= 1) {
intel_sdvo->ddc_bus = ddc;
edid = drm_get_edid(connector, intel_sdvo->base.ddc_bus);
if (edid) {
/*
* When we can get the EDID, maybe it is the
* correct DDC bus. Update it.
*/
intel_sdvo->ddc_bus = temp_ddc;
if (edid)
break;
}
temp_ddc >>= 1;
}
/*
* If we found the EDID on the other bus, maybe that is the
* correct DDC bus.
*/
if (edid == NULL)
intel_sdvo->ddc_bus = saved_ddc;
}
/* 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
/*
* 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 && intel_sdvo->analog_ddc_bus &&
if (edid == NULL &&
intel_sdvo->analog_ddc_bus &&
!intel_analog_is_connected(connector->dev))
edid = drm_get_edid(connector, intel_sdvo->analog_ddc_bus);
status = connector_status_disconnected;
if (edid != NULL) {
bool is_digital = !!(edid->input & DRM_EDID_INPUT_DIGITAL);
bool need_digital = !!(intel_sdvo_connector->output_flag & SDVO_TMDS_MASK);
/* DDC bus is shared, match EDID to connector type */
if (is_digital && need_digital)
if (edid->input & DRM_EDID_INPUT_DIGITAL) {
status = connector_status_connected;
intel_sdvo->is_hdmi = drm_detect_hdmi_monitor(edid);
else if (is_digital != need_digital)
status = connector_status_disconnected;
}
connector->display_info.raw_edid = NULL;
} else
status = connector_status_disconnected;
kfree(edid);
}
kfree(edid);
return status;
}