Commit 6cb1612a authored by Jani Nikula's avatar Jani Nikula Committed by Daniel Vetter

drm/i915/sdvo: force GPIO bit-banging also on default pin

commit 63abf3ed
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Dec 8 16:48:21 2010 +0000

    drm/i915/sdvo: Only use the SDVO pin if it is in the valid range

added a default fallback if BIOS provides an invalid pin mapping, but
failed to force GPIO bit-banging on it. Finish the job, and also clean up
the function a bit. With bit-banging, setting the gmbus speed has no
effect, so drop it.
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
[danvet: Extend comment about gmbus in the code a bit.]
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 5de8bbf5
......@@ -2042,17 +2042,17 @@ intel_sdvo_select_i2c_bus(struct drm_i915_private *dev_priv,
else
mapping = &dev_priv->sdvo_mappings[1];
pin = GMBUS_PORT_DPB;
if (mapping->initialized)
if (mapping->initialized && intel_gmbus_is_port_valid(mapping->i2c_pin))
pin = mapping->i2c_pin;
else
pin = GMBUS_PORT_DPB;
if (intel_gmbus_is_port_valid(pin)) {
sdvo->i2c = intel_gmbus_get_adapter(dev_priv, pin);
intel_gmbus_set_speed(sdvo->i2c, GMBUS_RATE_1MHZ);
/* With gmbus we should be able to drive sdvo i2c at 2MHz, but somehow
* our code totally fails once we start using gmbus. Hence fall back to
* bit banging for now. */
intel_gmbus_force_bit(sdvo->i2c, true);
} else {
sdvo->i2c = intel_gmbus_get_adapter(dev_priv, GMBUS_PORT_DPB);
}
}
static bool
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment