[alsa-devel] [RFC PATCH 2/2] ASoC: add compress stream support
Vinod Koul
vinod.koul at linux.intel.com
Tue Jul 31 08:41:40 CEST 2012
From: Namarta Kohli <namartax.kohli at intel.com>
This patch adds the support to parse the compress dai's and then also adds the
soc-compress.c file while handles the compress stream operations, mostly analogous
to what is done in the soc-pcm.c and additional handling of the compress
operations
Signed-off-by: Namarta Kohli <namartax.kohli at intel.com>
Signed-off-by: Ramesh Babu K V <ramesh.babu at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at linux.intel.com>
---
sound/soc/Makefile | 2 +-
sound/soc/soc-compress.c | 297 ++++++++++++++++++++++++++++++++++++++++++++++
sound/soc/soc-core.c | 10 ++-
3 files changed, 307 insertions(+), 2 deletions(-)
create mode 100644 sound/soc/soc-compress.c
diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index 00a555a..c126400 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -1,5 +1,5 @@
snd-soc-core-objs := soc-core.o soc-dapm.o soc-jack.o soc-cache.o soc-utils.o
-snd-soc-core-objs += soc-pcm.o soc-io.o
+snd-soc-core-objs += soc-pcm.o soc-compress.o soc-io.o
snd-soc-dmaengine-pcm-objs := soc-dmaengine-pcm.o
obj-$(CONFIG_SND_SOC_DMAENGINE_PCM) += snd-soc-dmaengine-pcm.o
diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
new file mode 100644
index 0000000..573f9bc
--- /dev/null
+++ b/sound/soc/soc-compress.c
@@ -0,0 +1,297 @@
+/*
+ * soc-compress.c -- ALSA SoC Compress
+ *
+ * Copyright (C) 2012 Intel Corp.
+ *
+ * Authors: Namarta Kohli <namartax.kohli at intel.com>
+ * Ramesh Babu K V <ramesh.babu at linux.intel.com>
+ * Vinod Koul <vinod.koul at linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <sound/core.h>
+#include <sound/compress_params.h>
+#include <sound/compress_driver.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+
+static int soc_compr_open(struct snd_compr_stream *cstream)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ int ret = 0;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->open) {
+ ret = platform->driver->compr_ops->open(cstream);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
+ goto out;
+ }
+ }
+
+ if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) {
+ ret = rtd->dai_link->compr_ops->startup(cstream);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
+ goto machine_err;
+ }
+ }
+
+ if (cstream->direction == SND_COMPRESS_PLAYBACK) {
+ cpu_dai->playback_active++;
+ codec_dai->playback_active++;
+ } else {
+ cpu_dai->capture_active++;
+ codec_dai->capture_active++;
+ }
+ cpu_dai->active++;
+ codec_dai->active++;
+ rtd->codec->active++;
+
+ return 0;
+
+machine_err:
+ if (platform->driver->compr_ops && platform->driver->compr_ops->free)
+ platform->driver->compr_ops->free(cstream);
+out:
+ return ret;
+}
+
+static int soc_compr_free(struct snd_compr_stream *cstream)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_codec *codec = rtd->codec;
+
+ if (cstream->direction == SND_COMPRESS_PLAYBACK) {
+ cpu_dai->playback_active--;
+ codec_dai->playback_active--;
+ } else {
+ cpu_dai->capture_active--;
+ codec_dai->capture_active--;
+ }
+
+ cpu_dai->active--;
+ codec_dai->active--;
+ codec->active--;
+
+ if (!cpu_dai->active)
+ cpu_dai->rate = 0;
+
+ if (!codec_dai->active)
+ codec_dai->rate = 0;
+
+ /* Muting the DAC suppresses artifacts caused during digital
+ * shutdown, for example from stopping clocks.
+ */
+ if (cstream->direction == SND_COMPRESS_PLAYBACK)
+ snd_soc_dai_digital_mute(codec_dai, 1);
+
+ if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown)
+ rtd->dai_link->compr_ops->shutdown(cstream);
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->free)
+ platform->driver->compr_ops->free(cstream);
+ cpu_dai->runtime = NULL;
+
+ if (cstream->direction == SND_COMPRESS_PLAYBACK) {
+ if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
+ rtd->dai_link->ignore_pmdown_time) {
+ snd_soc_dapm_stream_event(rtd,
+ SNDRV_PCM_STREAM_PLAYBACK,
+ SND_SOC_DAPM_STREAM_STOP);
+ } else
+ codec_dai->pop_wait = 1;
+ schedule_delayed_work(&rtd->delayed_work,
+ msecs_to_jiffies(rtd->pmdown_time));
+ } else {
+ /* capture streams can be powered down now */
+ snd_soc_dapm_stream_event(rtd,
+ SNDRV_PCM_STREAM_CAPTURE,
+ SND_SOC_DAPM_STREAM_STOP);
+ }
+
+ mutex_unlock(&rtd->pcm_mutex);
+ return 0;
+}
+
+static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
+{
+
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ int ret = 0;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
+ ret = platform->driver->compr_ops->trigger(cstream, cmd);
+ if (ret < 0)
+ return ret;
+ }
+ return ret;
+}
+int soc_compr_set_params(struct snd_compr_stream *cstream,
+ struct snd_compr_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ int ret = 0;
+
+ /* first we call set_params for the platform driver
+ * this should configure the soc side
+ * if the machine has compressed ops then we call that as well
+ * expectation is that platform and machine will configure everything
+ * for this compress path, like configuring pcm port for codec
+ */
+ if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
+ ret = platform->driver->compr_ops->set_params(cstream, params);
+ if (ret < 0)
+ return ret;
+ }
+ if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
+ ret = rtd->dai_link->compr_ops->set_params(cstream);
+ if (ret < 0)
+ return ret;
+ }
+
+ snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
+ SND_SOC_DAPM_STREAM_START);
+
+ snd_soc_dai_digital_mute(codec_dai, 0);
+ return ret;
+}
+
+int soc_compr_get_params(struct snd_compr_stream *cstream,
+ struct snd_codec *params)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ int ret = 0;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->get_params) {
+ ret = platform->driver->compr_ops->get_params(cstream, params);
+ if (ret < 0)
+ return ret;
+ }
+ return ret;
+}
+
+int soc_compr_get_caps(struct snd_compr_stream *cstream,
+ struct snd_compr_caps *caps)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ int ret = 0;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->get_caps) {
+ ret = platform->driver->compr_ops->get_caps(cstream, caps);
+ if (ret < 0)
+ return ret;
+ }
+ return ret;
+}
+
+int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
+ struct snd_compr_codec_caps *codec)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ int ret = 0;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps)
+ ret = platform->driver->compr_ops->get_codec_caps(cstream, codec);
+ if (ret < 0)
+ return ret;
+ return ret;
+}
+
+int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ int ret = 0;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->ack)
+ ret = platform->driver->compr_ops->ack(cstream, bytes);
+ if (ret < 0)
+ return ret;
+
+ return ret;
+}
+
+int soc_compr_pointer(struct snd_compr_stream *cstream,
+ struct snd_compr_tstamp *tstamp)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->pointer)
+ platform->driver->compr_ops->pointer(cstream, tstamp);
+
+ return 0;
+}
+
+/* ASoC Compress operations */
+static struct snd_compr_ops soc_compr_ops = {
+ .open = soc_compr_open,
+ .free = soc_compr_free,
+ .set_params = soc_compr_set_params,
+ .get_params = soc_compr_get_params,
+ .trigger = soc_compr_trigger,
+ .pointer = soc_compr_pointer,
+ .ack = soc_compr_ack,
+ .get_caps = soc_compr_get_caps,
+ .get_codec_caps = soc_compr_get_codec_caps
+};
+
+/* create a new compress */
+int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
+{
+ struct snd_soc_codec *codec = rtd->codec;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_compr *compr;
+ char new_name[64];
+ int ret = 0, direction = 0;
+
+ /* check client and interface hw capabilities */
+ snprintf(new_name, sizeof(new_name), "%s %s-%d",
+ rtd->dai_link->stream_name, codec_dai->name, num);
+ /* TODO add support for cature */
+ direction = SND_COMPRESS_PLAYBACK;
+ compr = kzalloc(sizeof(*compr), GFP_KERNEL);
+ if (compr == NULL) {
+ snd_printk(KERN_ERR "Cannot allocate compr\n");
+ return -ENOMEM;
+ }
+
+ compr->ops = &soc_compr_ops;
+ mutex_init(&compr->lock);
+ ret = snd_compress_new(rtd->card->snd_card, num, direction, compr);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
+ kfree(compr);
+ return ret;
+ }
+
+ rtd->compr = compr;
+ compr->private_data = rtd;
+
+ printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
+ cpu_dai->name);
+ return ret;
+}
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index f219b2f..492275b 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1388,7 +1388,15 @@ static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
if (ret < 0)
pr_warn("asoc: failed to add pmdown_time sysfs:%d\n", ret);
- if (!dai_link->params) {
+ if (cpu_dai->driver->compress_dai) {
+ /*create compress device*/
+ ret = soc_new_compress(rtd, num);
+ if (ret < 0 ) {
+ printk(KERN_ERR "asoc: can't create offload %s\n",
+ dai_link->stream_name);
+ return ret;
+ }
+ } else if (!dai_link->params) {
/* create the pcm */
ret = soc_new_pcm(rtd, num);
if (ret < 0) {
--
1.7.0.4
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