7 files changed, 118 insertions, 29 deletions

diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h
index f11c35cd5532..15017311f2e9 100644
--- a/include/sound/dmaengine_pcm.h
+++ b/include/sound/dmaengine_pcm.h
@@ -61,6 +61,8 @@ struct dma_chan *snd_dmaengine_pcm_get_chan(struct snd_pcm_substream *substream)
  * @slave_id: Slave requester id for the DMA channel.
  * @filter_data: Custom DMA channel filter data, this will usually be used when
  * requesting the DMA channel.
+ * @chan_name: Custom channel name to use when requesting DMA channel.
+ * @fifo_size: FIFO size of the DAI controller in bytes
  */
 struct snd_dmaengine_dai_dma_data {
         dma_addr_t addr;
@@ -68,6 +70,8 @@ struct snd_dmaengine_dai_dma_data {
         u32 maxburst;
         unsigned int slave_id;
         void *filter_data;
+        const char *chan_name;
+        unsigned int fifo_size;
 };
 
 void snd_dmaengine_pcm_set_config_from_dai_data(
@@ -96,6 +100,10 @@ void snd_dmaengine_pcm_set_config_from_dai_data(
  * playback.
  */
 #define SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX BIT(3)
+/*
+ * The PCM streams have custom channel names specified.
+ */
+#define SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME BIT(4)
 
 /**
  * struct snd_dmaengine_pcm_config - Configuration data for dmaengine based PCM
diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index ae9a227d35d3..97943fd397cc 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -276,6 +276,13 @@ static inline void snd_soc_dai_set_dma_data(struct snd_soc_dai *dai,
                 dai->capture_dma_data = data;
 }
 
+static inline void snd_soc_dai_init_dma_data(struct snd_soc_dai *dai,
+                                             void *playback, void *capture)
+{
+        dai->playback_dma_data = playback;
+        dai->capture_dma_data = capture;
+}
+
 static inline void snd_soc_dai_set_drvdata(struct snd_soc_dai *dai,
                 void *data)
 {
diff --git a/sound/soc/cirrus/ep93xx-pcm.c b/sound/soc/cirrus/ep93xx-pcm.c
index 0e9f56e0d4b2..cfe517e68009 100644
--- a/sound/soc/cirrus/ep93xx-pcm.c
+++ b/sound/soc/cirrus/ep93xx-pcm.c
@@ -57,9 +57,22 @@ static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
         return false;
 }
 
+static struct dma_chan *ep93xx_compat_request_channel(
+        struct snd_soc_pcm_runtime *rtd,
+        struct snd_pcm_substream *substream)
+{
+        struct snd_dmaengine_dai_dma_data *dma_data;
+
+        dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+        return snd_dmaengine_pcm_request_channel(ep93xx_pcm_dma_filter,
+                                                 dma_data);
+}
+
 static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = {
         .pcm_hardware = &ep93xx_pcm_hardware,
         .compat_filter_fn = ep93xx_pcm_dma_filter,
+        .compat_request_channel = ep93xx_compat_request_channel,
         .prealloc_buffer_size = 131072,
 };
 
diff --git a/sound/soc/fsl/imx-pcm-dma.c b/sound/soc/fsl/imx-pcm-dma.c
index 4dc1296688e9..aee23077080a 100644
--- a/sound/soc/fsl/imx-pcm-dma.c
+++ b/sound/soc/fsl/imx-pcm-dma.c
@@ -25,12 +25,10 @@
 
 static bool filter(struct dma_chan *chan, void *param)
 {
-        struct snd_dmaengine_dai_dma_data *dma_data = param;
-
         if (!imx_dma_is_general_purpose(chan))
                 return false;
 
-        chan->private = dma_data->filter_data;
+        chan->private = param;
 
         return true;
 }
diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index b302f3b7a587..3e08b6c0f7ba 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -702,13 +702,6 @@ static int i2s_hw_params(struct snd_pcm_substream *substream,
         }
         writel(mod, i2s->addr + I2SMOD);
 
-        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-                snd_soc_dai_set_dma_data(dai, substream,
-                        (void *)&i2s->dma_playback);
-        else
-                snd_soc_dai_set_dma_data(dai, substream,
-                        (void *)&i2s->dma_capture);
-
         i2s->frmclk = params_rate(params);
 
         return 0;
@@ -970,6 +963,8 @@ static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
         }
         clk_prepare_enable(i2s->clk);
 
+        snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
+
         if (other) {
                 other->addr = i2s->addr;
                 other->clk = i2s->clk;
diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c
index e29ec3cd84b1..6ad4c7a47f5d 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -25,7 +25,7 @@
 #include <sound/dmaengine_pcm.h>
 
 struct dmaengine_pcm {
-        struct dma_chan *chan[SNDRV_PCM_STREAM_CAPTURE + 1];
+        struct dma_chan *chan[SNDRV_PCM_STREAM_LAST + 1];
         const struct snd_dmaengine_pcm_config *config;
         struct snd_soc_platform platform;
         unsigned int flags;
@@ -36,6 +36,15 @@ static struct dmaengine_pcm *soc_platform_to_pcm(struct snd_soc_platform *p)
         return container_of(p, struct dmaengine_pcm, platform);
 }
 
+static struct device *dmaengine_dma_dev(struct dmaengine_pcm *pcm,
+        struct snd_pcm_substream *substream)
+{
+        if (!pcm->chan[substream->stream])
+                return NULL;
+
+        return pcm->chan[substream->stream]->device->dev;
+}
+
 /**
  * snd_dmaengine_pcm_prepare_slave_config() - Generic prepare_slave_config callback
  * @substream: PCM substream
@@ -75,12 +84,21 @@ static int dmaengine_pcm_hw_params(struct snd_pcm_substream *substream,
         struct snd_soc_pcm_runtime *rtd = substream->private_data;
         struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
         struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
+        int (*prepare_slave_config)(struct snd_pcm_substream *substream,
+                        struct snd_pcm_hw_params *params,
+                        struct dma_slave_config *slave_config);
         struct dma_slave_config slave_config;
         int ret;
 
-        if (pcm->config->prepare_slave_config) {
-                ret = pcm->config->prepare_slave_config(substream, params,
-                                &slave_config);
+        memset(&slave_config, 0, sizeof(slave_config));
+
+        if (!pcm->config)
+                prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
+        else
+                prepare_slave_config = pcm->config->prepare_slave_config;
+
+        if (prepare_slave_config) {
+                ret = prepare_slave_config(substream, params, &slave_config);
                 if (ret)
                         return ret;
 
@@ -92,28 +110,54 @@ static int dmaengine_pcm_hw_params(struct snd_pcm_substream *substream,
         return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 }
 
-static int dmaengine_pcm_open(struct snd_pcm_substream *substream)
+static int dmaengine_pcm_set_runtime_hwparams(struct snd_pcm_substream *substream)
 {
         struct snd_soc_pcm_runtime *rtd = substream->private_data;
         struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
+        struct device *dma_dev = dmaengine_dma_dev(pcm, substream);
         struct dma_chan *chan = pcm->chan[substream->stream];
+        struct snd_dmaengine_dai_dma_data *dma_data;
+        struct dma_slave_caps dma_caps;
+        struct snd_pcm_hardware hw;
         int ret;
 
-        ret = snd_soc_set_runtime_hwparams(substream,
+        if (pcm->config && pcm->config->pcm_hardware)
+                return snd_soc_set_runtime_hwparams(substream,
                                 pcm->config->pcm_hardware);
-        if (ret)
-                return ret;
 
-        return snd_dmaengine_pcm_open(substream, chan);
+        dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+        memset(&hw, 0, sizeof(hw));
+        hw.info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
+                        SNDRV_PCM_INFO_INTERLEAVED;
+        hw.periods_min = 2;
+        hw.periods_max = UINT_MAX;
+        hw.period_bytes_min = 256;
+        hw.period_bytes_max = dma_get_max_seg_size(dma_dev);
+        hw.buffer_bytes_max = SIZE_MAX;
+        hw.fifo_size = dma_data->fifo_size;
+
+        ret = dma_get_slave_caps(chan, &dma_caps);
+        if (ret == 0) {
+                if (dma_caps.cmd_pause)
+                        hw.info |= SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME;
+        }
+
+        return snd_soc_set_runtime_hwparams(substream, &hw);
 }
 
-static struct device *dmaengine_dma_dev(struct dmaengine_pcm *pcm,
-        struct snd_pcm_substream *substream)
+static int dmaengine_pcm_open(struct snd_pcm_substream *substream)
 {
-        if (!pcm->chan[substream->stream])
-                return NULL;
+        struct snd_soc_pcm_runtime *rtd = substream->private_data;
+        struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
+        struct dma_chan *chan = pcm->chan[substream->stream];
+        int ret;
 
-        return pcm->chan[substream->stream]->device->dev;
+        ret = dmaengine_pcm_set_runtime_hwparams(substream);
+        if (ret)
+                return ret;
+
+        return snd_dmaengine_pcm_open(substream, chan);
 }
 
 static void dmaengine_pcm_free(struct snd_pcm *pcm)
@@ -126,6 +170,9 @@ static struct dma_chan *dmaengine_pcm_compat_request_channel(
         struct snd_pcm_substream *substream)
 {
         struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
+        struct snd_dmaengine_dai_dma_data *dma_data;
+
+        dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
         if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX) && pcm->chan[0])
                 return pcm->chan[0];
@@ -134,22 +181,42 @@ static struct dma_chan *dmaengine_pcm_compat_request_channel(
                 return pcm->config->compat_request_channel(rtd, substream);
 
         return snd_dmaengine_pcm_request_channel(pcm->config->compat_filter_fn,
-                snd_soc_dai_get_dma_data(rtd->cpu_dai, substream));
+                                                 dma_data->filter_data);
 }
 
 static int dmaengine_pcm_new(struct snd_soc_pcm_runtime *rtd)
 {
         struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
         const struct snd_dmaengine_pcm_config *config = pcm->config;
+        struct device *dev = rtd->platform->dev;
+        struct snd_dmaengine_dai_dma_data *dma_data;
         struct snd_pcm_substream *substream;
+        size_t prealloc_buffer_size;
+        size_t max_buffer_size;
         unsigned int i;
         int ret;
 
+        if (config && config->prealloc_buffer_size) {
+                prealloc_buffer_size = config->prealloc_buffer_size;
+                max_buffer_size = config->pcm_hardware->buffer_bytes_max;
+        } else {
+                prealloc_buffer_size = 512 * 1024;
+                max_buffer_size = SIZE_MAX;
+        }
+
+
         for (i = SNDRV_PCM_STREAM_PLAYBACK; i <= SNDRV_PCM_STREAM_CAPTURE; i++) {
                 substream = rtd->pcm->streams[i].substream;
                 if (!substream)
                         continue;
 
+                dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+                if (!pcm->chan[i] &&
+                    (pcm->flags & SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME))
+                        pcm->chan[i] = dma_request_slave_channel(dev,
+                                dma_data->chan_name);
+
                 if (!pcm->chan[i] && (pcm->flags & SND_DMAENGINE_PCM_FLAG_COMPAT)) {
                         pcm->chan[i] = dmaengine_pcm_compat_request_channel(rtd,
                                 substream);
@@ -165,8 +232,8 @@ static int dmaengine_pcm_new(struct snd_soc_pcm_runtime *rtd)
                 ret = snd_pcm_lib_preallocate_pages(substream,
                                 SNDRV_DMA_TYPE_DEV,
                                 dmaengine_dma_dev(pcm, substream),
-                                config->prealloc_buffer_size,
-                                config->pcm_hardware->buffer_bytes_max);
+                                prealloc_buffer_size,
+                                max_buffer_size);
                 if (ret)
                         goto err_free;
         }
@@ -222,7 +289,9 @@ static void dmaengine_pcm_request_chan_of(struct dmaengine_pcm *pcm,
 {
         unsigned int i;
 
-        if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_NO_DT) || !dev->of_node)
+        if ((pcm->flags & (SND_DMAENGINE_PCM_FLAG_NO_DT |
+                           SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME)) ||
+            !dev->of_node)
                 return;
 
         if (pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX) {
diff --git a/sound/soc/tegra/tegra_pcm.c b/sound/soc/tegra/tegra_pcm.c
index f056f632557c..7b2d23ba69b3 100644
--- a/sound/soc/tegra/tegra_pcm.c
+++ b/sound/soc/tegra/tegra_pcm.c
@@ -56,7 +56,6 @@ static const struct snd_pcm_hardware tegra_pcm_hardware = {
 static const struct snd_dmaengine_pcm_config tegra_dmaengine_pcm_config = {
         .pcm_hardware = &tegra_pcm_hardware,
         .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
-        .compat_filter_fn = NULL,
         .prealloc_buffer_size = PAGE_SIZE * 8,
 };