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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>
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@ -179,6 +179,7 @@ radeon_dp_aux_transfer_atom(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
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switch (msg->request & ~DP_AUX_I2C_MOT) {
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case DP_AUX_NATIVE_WRITE:
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case DP_AUX_I2C_WRITE:
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case DP_AUX_I2C_WRITE_STATUS_UPDATE:
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/* The atom implementation only supports writes with a max payload of
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* 12 bytes since it uses 4 bits for the total count (header + payload)
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* in the parameter space. The atom interface supports 16 byte
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