From: Bard Liao <yung-chuan.liao@linux.intel.com>
To: alsa-devel@alsa-project.org, vkoul@kernel.org
Cc: vinod.koul@linaro.org, linux-kernel@vger.kernel.org,
tiwai@suse.de, broonie@kernel.org, gregkh@linuxfoundation.org,
jank@cadence.com, srinivas.kandagatla@linaro.org,
rander.wang@linux.intel.com, ranjani.sridharan@linux.intel.com,
hui.wang@canonical.com, pierre-louis.bossart@linux.intel.com,
sanyog.r.kale@intel.com, slawomir.blauciak@intel.com,
mengdong.lin@intel.com, bard.liao@intel.com
Subject: [PATCH 2/5] soundwire: stream: add helper to startup/shutdown streams
Date: Tue, 23 Jun 2020 05:23:29 +0800 [thread overview]
Message-ID: <20200622212332.16277-3-yung-chuan.liao@linux.intel.com> (raw)
In-Reply-To: <20200622212332.16277-1-yung-chuan.liao@linux.intel.com>
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To handle streams at the dailink level, expose two helpers that will
be called from machine drivers.
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
drivers/soundwire/stream.c | 90 +++++++++++++++++++++++++++++++++++
include/linux/soundwire/sdw.h | 2 +
2 files changed, 92 insertions(+)
diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index a9a72574b34a..48daf4b48f51 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -13,6 +13,9 @@
#include <linux/slab.h>
#include <linux/soundwire/sdw_registers.h>
#include <linux/soundwire/sdw.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
#include "bus.h"
/*
@@ -1826,3 +1829,90 @@ int sdw_deprepare_stream(struct sdw_stream_runtime *stream)
return ret;
}
EXPORT_SYMBOL(sdw_deprepare_stream);
+
+static int set_stream(struct snd_pcm_substream *substream,
+ struct sdw_stream_runtime *sdw_stream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *dai;
+ int ret = 0;
+ int i;
+
+ /* Set stream pointer on all DAIs */
+ for_each_rtd_dais(rtd, i, dai) {
+ ret = snd_soc_dai_set_sdw_stream(dai, sdw_stream,
+ substream->stream);
+ if (ret < 0) {
+ dev_err(rtd->dev,
+ "failed to set stream pointer on dai %s",
+ dai->name);
+ break;
+ }
+ }
+
+ return ret;
+}
+
+int sdw_startup_stream(void *sdw_substream)
+{
+ struct snd_pcm_substream *substream = sdw_substream;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct sdw_stream_runtime *sdw_stream;
+ char *name;
+ int ret;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ name = kasprintf(GFP_KERNEL, "%s-Playback", substream->name);
+ else
+ name = kasprintf(GFP_KERNEL, "%s-Capture", substream->name);
+
+ if (!name)
+ return -ENOMEM;
+
+ sdw_stream = sdw_alloc_stream(name);
+ if (!sdw_stream) {
+ dev_err(rtd->dev, "alloc stream failed for substream DAI %s",
+ substream->name);
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ ret = set_stream(substream, sdw_stream);
+ if (ret < 0)
+ goto release_stream;
+ return 0;
+
+release_stream:
+ sdw_release_stream(sdw_stream);
+ set_stream(substream, NULL);
+error:
+ kfree(name);
+ return ret;
+}
+EXPORT_SYMBOL(sdw_startup_stream);
+
+void sdw_shutdown_stream(void *sdw_substream)
+{
+ struct snd_pcm_substream *substream = sdw_substream;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ 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 (!sdw_stream) {
+ dev_err(rtd->dev, "no stream found for DAI %s", dai->name);
+ return;
+ }
+
+ /* release memory */
+ kfree(sdw_stream->name);
+ sdw_release_stream(sdw_stream);
+
+ /* clear DAI data */
+ set_stream(substream, NULL);
+}
+EXPORT_SYMBOL(sdw_shutdown_stream);
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index 9c27a32df9bb..51ecbd8faa8c 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -952,10 +952,12 @@ int sdw_stream_remove_master(struct sdw_bus *bus,
struct sdw_stream_runtime *stream);
int sdw_stream_remove_slave(struct sdw_slave *slave,
struct sdw_stream_runtime *stream);
+int sdw_startup_stream(void *sdw_substream);
int sdw_prepare_stream(struct sdw_stream_runtime *stream);
int sdw_enable_stream(struct sdw_stream_runtime *stream);
int sdw_disable_stream(struct sdw_stream_runtime *stream);
int sdw_deprepare_stream(struct sdw_stream_runtime *stream);
+void sdw_shutdown_stream(void *sdw_substream);
int sdw_bus_prep_clk_stop(struct sdw_bus *bus);
int sdw_bus_clk_stop(struct sdw_bus *bus);
int sdw_bus_exit_clk_stop(struct sdw_bus *bus);
--
2.17.1
next prev parent reply other threads:[~2020-06-23 9:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-22 21:23 [PATCH 0/5] soundwire: handle stream at the dailink level Bard Liao
2020-06-22 21:23 ` [PATCH 1/5] soundwire: intel: implement get_sdw_stream() operations Bard Liao
2020-06-22 21:23 ` Bard Liao [this message]
2020-06-30 16:03 ` [PATCH 2/5] soundwire: stream: add helper to startup/shutdown streams Vinod Koul
2020-06-30 16:58 ` Pierre-Louis Bossart
2020-07-01 5:39 ` Vinod Koul
2020-06-22 21:23 ` [PATCH 3/5] soundwire: intel: remove stream allocation/free Bard Liao
2020-06-22 21:23 ` [PATCH 4/5] soundwire: cadence: allocate/free dma_data in set_sdw_stream Bard Liao
2020-06-22 21:23 ` [PATCH 5/5] soundwire: intel: don't free dma_data in DAI shutdown Bard Liao
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