Commit 748a1d5a authored by Jeeja KP's avatar Jeeja KP Committed by Mark Brown
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ASoC: Intel: Skylake: Add DMA resume position in Trigger resume/suspend 



Use the DMA resume capability to resume the DMA position when
stream is suspended/resumed.

In suspend we save the position and when stream is resumed the stream needs
to be started from the position when the stream was suspended using the new
DMA resume capabilities

Signed-off-by: default avatarJeeja KP <jeeja.kp@intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 1f4956fd

sound/soc/intel/skylake/skl-pcm.c

+19 −1
Original line number Diff line number Diff line
@@ -393,6 +393,15 @@ static int skl_pcm_trigger(struct snd_pcm_substream *substream, int cmd, 
	switch (cmd) {

	case SNDRV_PCM_TRIGGER_RESUME:

		skl_pcm_prepare(substream, dai);

		/*

		 * enable DMA Resume enable bit for the stream, set the dpib

		 * & lpib position to resune before starting the DMA

		 */

		snd_hdac_ext_stream_drsm_enable(ebus, true,

					hdac_stream(stream)->index);

		snd_hdac_ext_stream_set_dpibr(ebus, stream, stream->dpib);

		snd_hdac_ext_stream_set_lpib(stream, stream->lpib);



	case SNDRV_PCM_TRIGGER_START:

	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:

		/*
@@ -421,8 +430,17 @@ static int skl_pcm_trigger(struct snd_pcm_substream *substream, int cmd, 
			return ret;



		ret = skl_decoupled_trigger(substream, cmd);

		if (cmd == SNDRV_PCM_TRIGGER_SUSPEND)

		if (cmd == SNDRV_PCM_TRIGGER_SUSPEND) {

			/* save the dpib and lpib positions */

			stream->dpib = readl(ebus->bus.remap_addr +

					AZX_REG_VS_SDXDPIB_XBASE +

					(AZX_REG_VS_SDXDPIB_XINTERVAL *

					hdac_stream(stream)->index));



			stream->lpib = snd_hdac_stream_get_pos_lpib(

							hdac_stream(stream));

			snd_hdac_ext_stream_decouple(ebus, stream, false);

		}

		break;



	default:

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