[alsa-devel] [PATCH 03/21] ALSA: hda - Add DSP loader to core library code
Takashi Iwai
tiwai at suse.de
Fri Apr 24 14:38:35 CEST 2015
Copied from the legacy driver code, no transition done yet.
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
include/sound/hdaudio.h | 46 ++++++++++++++++++++
sound/hda/Kconfig | 3 ++
sound/hda/hdac_stream.c | 113 ++++++++++++++++++++++++++++++++++++++++++++++++
sound/pci/hda/Kconfig | 3 --
4 files changed, 162 insertions(+), 3 deletions(-)
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 9349ccf15a36..69f27bc49eb4 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -187,6 +187,11 @@ struct hdac_io_ops {
u16 (*reg_readw)(u16 __iomem *addr);
void (*reg_writeb)(u8 value, u8 __iomem *addr);
u8 (*reg_readb)(u8 __iomem *addr);
+ /* Allocation ops */
+ int (*dma_alloc_pages)(struct hdac_bus *bus, int type, size_t size,
+ struct snd_dma_buffer *buf);
+ void (*dma_free_pages)(struct hdac_bus *bus,
+ struct snd_dma_buffer *buf);
};
#define HDA_UNSOL_QUEUE_SIZE 64
@@ -374,6 +379,7 @@ struct hdac_stream {
bool opened:1;
bool running:1;
bool no_period_wakeup:1;
+ bool locked:1;
/* timestamp */
unsigned long start_wallclk; /* start + minimum wallclk */
@@ -383,6 +389,10 @@ struct hdac_stream {
int delay_negative_threshold;
struct list_head list;
+#ifdef CONFIG_SND_HDA_DSP_LOADER
+ /* DSP access mutex */
+ struct mutex dsp_mutex;
+#endif
};
void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
@@ -440,6 +450,42 @@ void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
(snd_hdac_stream_readb(dev, reg) & \
~(mask)) | (val))
+#ifdef CONFIG_SND_HDA_DSP_LOADER
+/* DSP lock helpers */
+#define snd_hdac_dsp_lock_init(dev) mutex_init(&(dev)->dsp_mutex)
+#define snd_hdac_dsp_lock(dev) mutex_lock(&(dev)->dsp_mutex)
+#define snd_hdac_dsp_unlock(dev) mutex_unlock(&(dev)->dsp_mutex)
+#define snd_hdac_stream_is_locked(dev) ((dev)->locked)
+/* DSP loader helpers */
+int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
+ unsigned int byte_size, struct snd_dma_buffer *bufp);
+void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
+void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
+ struct snd_dma_buffer *dmab);
+#else /* CONFIG_SND_HDA_DSP_LOADER */
+#define snd_hdac_dsp_lock_init(dev) do {} while (0)
+#define snd_hdac_dsp_lock(dev) do {} while (0)
+#define snd_hdac_dsp_unlock(dev) do {} while (0)
+#define snd_hdac_stream_is_locked(dev) 0
+
+static inline int
+snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
+ unsigned int byte_size, struct snd_dma_buffer *bufp)
+{
+ return 0;
+}
+
+static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
+{
+}
+
+static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
+ struct snd_dma_buffer *dmab)
+{
+}
+#endif /* CONFIG_SND_HDA_DSP_LOADER */
+
+
/*
* generic array helpers
*/
diff --git a/sound/hda/Kconfig b/sound/hda/Kconfig
index 001c6588a5ff..7a17fca4f627 100644
--- a/sound/hda/Kconfig
+++ b/sound/hda/Kconfig
@@ -1,3 +1,6 @@
config SND_HDA_CORE
tristate
select REGMAP
+
+config SND_HDA_DSP_LOADER
+ bool
diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c
index b513a15c777f..7f6b845d90eb 100644
--- a/sound/hda/hdac_stream.c
+++ b/sound/hda/hdac_stream.c
@@ -33,6 +33,7 @@ void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
azx_dev->index = idx;
azx_dev->direction = direction;
azx_dev->stream_tag = tag;
+ snd_hdac_dsp_lock_init(azx_dev);
list_add_tail(&azx_dev->list, &bus->stream_list);
}
EXPORT_SYMBOL_GPL(snd_hdac_stream_init);
@@ -534,3 +535,115 @@ void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
}
}
EXPORT_SYMBOL_GPL(snd_hdac_stream_sync);
+
+#ifdef CONFIG_SND_HDA_DSP_LOADER
+/**
+ * snd_hdac_dsp_prepare - prepare for DSP loading
+ * @azx_dev: HD-audio core stream used for DSP loading
+ * @format: HD-audio stream format
+ * @byte_size: data chunk byte size
+ * @bufp: allocated buffer
+ *
+ * Allocate the buffer for the given size and set up the given stream for
+ * DSP loading. Returns the stream tag (>= 0), or a negative error code.
+ */
+int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
+ unsigned int byte_size, struct snd_dma_buffer *bufp)
+{
+ struct hdac_bus *bus = azx_dev->bus;
+ u32 *bdl;
+ int err;
+
+ snd_hdac_dsp_lock(azx_dev);
+ spin_lock_irq(&bus->reg_lock);
+ if (azx_dev->running || azx_dev->locked) {
+ spin_unlock_irq(&bus->reg_lock);
+ err = -EBUSY;
+ goto unlock;
+ }
+ azx_dev->locked = true;
+ spin_unlock_irq(&bus->reg_lock);
+
+ err = bus->io_ops->dma_alloc_pages(bus, SNDRV_DMA_TYPE_DEV_SG,
+ byte_size, bufp);
+ if (err < 0)
+ goto err_alloc;
+
+ azx_dev->bufsize = byte_size;
+ azx_dev->period_bytes = byte_size;
+ azx_dev->format_val = format;
+
+ snd_hdac_stream_reset(azx_dev);
+
+ /* reset BDL address */
+ snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
+ snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);
+
+ azx_dev->frags = 0;
+ bdl = (u32 *)azx_dev->bdl.area;
+ err = setup_bdle(bus, bufp, azx_dev, &bdl, 0, byte_size, 0);
+ if (err < 0)
+ goto error;
+
+ snd_hdac_stream_setup(azx_dev);
+ snd_hdac_dsp_unlock(azx_dev);
+ return azx_dev->stream_tag;
+
+ error:
+ bus->io_ops->dma_free_pages(bus, bufp);
+ err_alloc:
+ spin_lock_irq(&bus->reg_lock);
+ azx_dev->locked = false;
+ spin_unlock_irq(&bus->reg_lock);
+ unlock:
+ snd_hdac_dsp_unlock(azx_dev);
+ return err;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_dsp_prepare);
+
+/**
+ * snd_hdac_dsp_trigger - start / stop DSP loading
+ * @azx_dev: HD-audio core stream used for DSP loading
+ * @start: trigger start or stop
+ */
+void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
+{
+ if (start)
+ snd_hdac_stream_start(azx_dev, true);
+ else
+ snd_hdac_stream_stop(azx_dev);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_dsp_trigger);
+
+/**
+ * snd_hdac_dsp_cleanup - clean up the stream from DSP loading to normal
+ * @azx_dev: HD-audio core stream used for DSP loading
+ * @dmab: buffer used by DSP loading
+ */
+void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
+ struct snd_dma_buffer *dmab)
+{
+ struct hdac_bus *bus = azx_dev->bus;
+
+ if (!dmab->area || !azx_dev->locked)
+ return;
+
+ snd_hdac_dsp_lock(azx_dev);
+ /* reset BDL address */
+ snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
+ snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);
+ snd_hdac_stream_writel(azx_dev, SD_CTL, 0);
+ azx_dev->bufsize = 0;
+ azx_dev->period_bytes = 0;
+ azx_dev->format_val = 0;
+
+ bus->io_ops->dma_free_pages(bus, dmab);
+ dmab->area = NULL;
+
+ spin_lock_irq(&bus->reg_lock);
+ azx_dev->locked = false;
+ spin_unlock_irq(&bus->reg_lock);
+ snd_hdac_dsp_unlock(azx_dev);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_dsp_cleanup);
+#endif /* CONFIG_SND_HDA_DSP_LOADER */
diff --git a/sound/pci/hda/Kconfig b/sound/pci/hda/Kconfig
index a5ed1c181784..47aa7b8b7519 100644
--- a/sound/pci/hda/Kconfig
+++ b/sound/pci/hda/Kconfig
@@ -38,9 +38,6 @@ config SND_HDA_TEGRA
if SND_HDA
-config SND_HDA_DSP_LOADER
- bool
-
config SND_HDA_PREALLOC_SIZE
int "Pre-allocated buffer size for HD-audio driver"
range 0 32768
--
2.3.5
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