ALSA: hda - Add DSP loader to core library code

Copied from the legacy driver code, no transition done yet.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 9349ccf..69f27bc 100644 (file)
--- 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 001c658..7a17fca 100644 (file)
--- 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 b513a15..7f6b845 100644 (file)
--- 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 a5ed1c1..47aa7b8 100644 (file)
--- 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