101 	struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);  in rsnd_dmaen_stop()  local
103 	if (dmaen->chan)  in rsnd_dmaen_stop()
104 		dmaengine_terminate_all(dmaen->chan);  in rsnd_dmaen_stop()
114 	struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);  in rsnd_dmaen_cleanup()  local
121 	if (dmaen->chan)  in rsnd_dmaen_cleanup()
122 		dma_release_channel(dmaen->chan);  in rsnd_dmaen_cleanup()
124 	dmaen->chan = NULL;  in rsnd_dmaen_cleanup()
134 	struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);  in rsnd_dmaen_prepare()  local
138 	if (dmaen->chan)  in rsnd_dmaen_prepare()
146 	dmaen->chan = rsnd_dmaen_request_channel(io,  in rsnd_dmaen_prepare()
149 	if (IS_ERR_OR_NULL(dmaen->chan)) {  in rsnd_dmaen_prepare()
150 		dmaen->chan = NULL;  in rsnd_dmaen_prepare()
163 	struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);  in rsnd_dmaen_start()  local
207 	ret = dmaengine_slave_config(dmaen->chan, &cfg);  in rsnd_dmaen_start()
211 	desc = dmaengine_prep_dma_cyclic(dmaen->chan,  in rsnd_dmaen_start()
226 	dmaen->dma_len		= snd_pcm_lib_buffer_bytes(substream);  in rsnd_dmaen_start()
228 	dmaen->cookie = dmaengine_submit(desc);  in rsnd_dmaen_start()
229 	if (dmaen->cookie < 0) {  in rsnd_dmaen_start()
234 	dma_async_issue_pending(dmaen->chan);  in rsnd_dmaen_start()
302 	struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);  in rsnd_dmaen_pointer()  local
307 	status = dmaengine_tx_status(dmaen->chan, dmaen->cookie, &state);  in rsnd_dmaen_pointer()
309 		if (state.residue > 0 && state.residue <= dmaen->dma_len)  in rsnd_dmaen_pointer()
310 			pos = dmaen->dma_len - state.residue;  in rsnd_dmaen_pointer()