linux-kernel - [PATCH v2 3/3] ASOC: Intel: sof_sdw: add dailink .prepare and .hw

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Message-Id: <20200903204650.31098-4-yung-chuan.liao@linux.intel.com>
Date:   Fri,  4 Sep 2020 04:46:50 +0800
From:   Bard Liao <yung-chuan.liao@...ux.intel.com>
To:     alsa-devel@...a-project.org, vkoul@...nel.org
Cc:     vinod.koul@...aro.org, linux-kernel@...r.kernel.org, tiwai@...e.de,
        broonie@...nel.org, gregkh@...uxfoundation.org, jank@...ence.com,
        srinivas.kandagatla@...aro.org, rander.wang@...ux.intel.com,
        ranjani.sridharan@...ux.intel.com, hui.wang@...onical.com,
        pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        mengdong.lin@...el.com, bard.liao@...el.com
Subject: [PATCH v2 3/3]  ASOC: Intel: sof_sdw: add dailink .prepare and .hw_free callback

From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

Add .prepare and .hw_free callback to dailink.

The companion patch for this patch is the removal of stream operations
in the .prepare and .hw_free callbacks at the DAI level in
drivers/soundwire/intel.c

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Reviewed-by: Rander Wang <rander.wang@...ux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
---
 sound/soc/intel/boards/sof_sdw.c | 40 ++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/sound/soc/intel/boards/sof_sdw.c b/sound/soc/intel/boards/sof_sdw.c
index f251e046d74d..16503772965c 100644
--- a/sound/soc/intel/boards/sof_sdw.c
+++ b/sound/soc/intel/boards/sof_sdw.c
@@ -195,6 +195,25 @@ int sdw_startup(struct snd_pcm_substream *substream)
 	return sdw_startup_stream(substream);
 }
 
+static int sdw_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct sdw_stream_runtime *sdw_stream;
+	struct snd_soc_dai *dai;
+
+	/* Find stream from first CPU DAI */
+	dai = asoc_rtd_to_cpu(rtd, 0);
+
+	sdw_stream = snd_soc_dai_get_sdw_stream(dai, substream->stream);
+
+	if (IS_ERR(sdw_stream)) {
+		dev_err(rtd->dev, "no stream found for DAI %s", dai->name);
+		return PTR_ERR(sdw_stream);
+	}
+
+	return sdw_prepare_stream(sdw_stream);
+}
+
 static int sdw_trigger(struct snd_pcm_substream *substream, int cmd)
 {
 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
@@ -235,6 +254,25 @@ static int sdw_trigger(struct snd_pcm_substream *substream, int cmd)
 	return ret;
 }
 
+static int sdw_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct sdw_stream_runtime *sdw_stream;
+	struct snd_soc_dai *dai;
+
+	/* Find stream from first CPU DAI */
+	dai = asoc_rtd_to_cpu(rtd, 0);
+
+	sdw_stream = snd_soc_dai_get_sdw_stream(dai, substream->stream);
+
+	if (IS_ERR(sdw_stream)) {
+		dev_err(rtd->dev, "no stream found for DAI %s", dai->name);
+		return PTR_ERR(sdw_stream);
+	}
+
+	return sdw_deprepare_stream(sdw_stream);
+}
+
 void sdw_shutdown(struct snd_pcm_substream *substream)
 {
 	sdw_shutdown_stream(substream);
@@ -242,7 +280,9 @@ void sdw_shutdown(struct snd_pcm_substream *substream)
 
 static const struct snd_soc_ops sdw_ops = {
 	.startup = sdw_startup,
+	.prepare = sdw_prepare,
 	.trigger = sdw_trigger,
+	.hw_free = sdw_hw_free,
 	.shutdown = sdw_shutdown,
 };
 
-- 
2.17.1