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drm/radeon/kms: fix displayport->dvi connector DDC.

PATCH New Dave Airlie 1 participant 1 message Jan 14, 2010

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Dave Airlie

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PATCH 1/1 drm/radeon/kms: fix displayport->dvi connector DDC.

From: Dave Airlie <[email protected]>

It appears that attempting AUXCH DDC breaks the subsequent attempt to do DDC over the i2c lines, so use the sink type to determine if we should be doing AUXCH or i2c DDC.

This fixes my DVI monitor plugged into DP->DVI convertor.

Signed-off-by Dave Airlie <[email protected]>
---
 drivers/gpu/drm/radeon/radeon_display.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
drivers/gpu/drm/radeon/radeon_display.c +2 -1
index 0ec491e..47ceae9 100644
@@ -357,7 +357,8 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
 	if ((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) ||
 	    (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP)) {
 		struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;
-		if (dig->dp_i2c_bus)
+		if ((dig->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT ||
+		     dig->dp_sink_type == CONNECTOR_OBJECT_ID_eDP) && dig->dp_i2c_bus)
 			radeon_connector->edid = drm_get_edid(&radeon_connector->base, &dig->dp_i2c_bus->adapter);
 	}
 	if (!radeon_connector->ddc_bus)
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1.6.5.2


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