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Commit 616e68cd authored by Banajit Goswami's avatar Banajit Goswami Committed by Gerrit - the friendly Code Review server
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asoc: vote for Glink Rx thread priority upgrade 



For Low-latency audio playback usecase, vote for a priority
upgrade for Glink Rx thread, to avoid any performance issue.

Change-Id: I8332c80eedd7325700e695f341fc4b92f65fd77c
Signed-off-by: default avatarBanajit Goswami <bgoswami@codeaurora.org>
parent 88327320

asoc/msm-pcm-q6-v2.c

+22 −0
Original line number Diff line number Diff line
@@ -614,8 +614,15 @@ static int msm_pcm_open(struct snd_pcm_substream *substream) 
	struct snd_pcm_runtime *runtime = substream->runtime;

	struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;

	struct msm_audio *prtd;

	struct msm_plat_data *pdata;

	int ret = 0;



	pdata = (struct msm_plat_data *)

		dev_get_drvdata(soc_prtd->platform->dev);

	if (!pdata) {

		pr_err("%s: platform data not populated\n", __func__);

		return -EINVAL;

	}

	prtd = kzalloc(sizeof(struct msm_audio), GFP_KERNEL);

	if (prtd == NULL)

		return -ENOMEM;
@@ -693,6 +700,10 @@ static int msm_pcm_open(struct snd_pcm_substream *substream) 
	prtd->reset_event = false;

	runtime->private_data = prtd;

	msm_adsp_init_mixer_ctl_pp_event_queue(soc_prtd);

	/* Vote to update the Rx thread priority to RT Thread for playback */

	if ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK) &&

	    (pdata->perf_mode == LOW_LATENCY_PCM_MODE))

		apr_start_rx_rt(prtd->audio_client->apr);



	return 0;

}
@@ -800,6 +811,7 @@ static int msm_pcm_playback_close(struct snd_pcm_substream *substream) 
	struct snd_pcm_runtime *runtime = substream->runtime;

	struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;

	struct msm_audio *prtd = runtime->private_data;

	struct msm_plat_data *pdata;

	uint32_t timeout;

	int dir = 0;

	int ret = 0;
@@ -809,6 +821,16 @@ static int msm_pcm_playback_close(struct snd_pcm_substream *substream) 
	if (prtd->audio_client) {

		dir = IN;



		/*

		 * Unvote to downgrade the Rx thread priority from

		 * RT Thread for Low-Latency use case.

		 */

		pdata = (struct msm_plat_data *)

			dev_get_drvdata(soc_prtd->platform->dev);

		if (pdata) {

			if (pdata->perf_mode == LOW_LATENCY_PCM_MODE)

				apr_end_rx_rt(prtd->audio_client->apr);

		}

		/* determine timeout length */

		if (runtime->frame_bits == 0 || runtime->rate == 0) {

			timeout = CMD_EOS_MIN_TIMEOUT_LENGTH;