Commit c1e74122 authored Aug 27, 2015 by Ville Syrjälä Committed by Daniel Vetter Sep 08, 2015

drm/i915: Handle DP_AUX_I2C_WRITE_STATUS_UPDATE



When we get an i2c defer or short ack for i2c-over-aux write we need
to switch to WRITE_STATUS_UPDATE to poll for the completion of the
original request.

i915 doesn't try to interpret wht request type apart from separating
reads from writes, and so we should be able to treat this the same as
a normal i2c write.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

parent 2b712be7

drivers/gpu/drm/i915/intel_dp.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -974,6 +974,7 @@ intel_dp_aux_transfer(struct drm_dp_aux aux, struct drm_dp_aux_msg msg)
		switch (msg->request & ~DP_AUX_I2C_MOT) {
		case DP_AUX_NATIVE_WRITE:
		case DP_AUX_I2C_WRITE:
		case DP_AUX_I2C_WRITE_STATUS_UPDATE:
		txsize = msg->size ? HEADER_SIZE + msg->size : BARE_ADDRESS_SIZE;
		rxsize = 2; /* 0 or 1 data bytes */