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drm/radeon: 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.

Looks like radeon doesn't do anything special with the request type,
so hopefully just treating it the same as a i2c write is enough.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2015-08-27 17:23:28 +03:00 committed by Daniel Vetter
parent c1e74122fb
commit 1f75b29d3f
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/radeon/atombios_dp.c
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@ -179,6 +179,7 @@ radeon_dp_aux_transfer_atom(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:
/* The atom implementation only supports writes with a max payload of
* 12 bytes since it uses 4 bits for the total count (header + payload)
* in the parameter space. The atom interface supports 16 byte