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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Divya Prakash <divya1.prakash@intel.com>
Date: Thu, 7 Apr 2016 10:32:45 +0530
Subject: [PATCH] ALSA: hda: Enhance HD audio framework to support compress
streams
Introduce APIs for compress stream DMA assignment,
BDL setup and buffer allocation.
Change-Id: I8cf4c8b96367cacc131a304c758d0aef53010d25
Signed-off-by: Divya Prakash
Reviewed-on:
Reviewed-by: Babu, Ramesh <ramesh.babu@intel.com>
Tested-by: Babu, Ramesh <ramesh.babu@intel.com>
---
include/sound/compress_driver.h | 6 ++++
include/sound/hdaudio.h | 2 ++
include/sound/hdaudio_ext.h | 4 +++
sound/hda/ext/hdac_ext_stream.c | 43 +++++++++++++++++++++++++++
sound/hda/hdac_stream.c | 51 ++++++++++++++++++++++-----------
5 files changed, 89 insertions(+), 17 deletions(-)
diff --git a/include/sound/compress_driver.h b/include/sound/compress_driver.h
index e87f2d5..934a004 100644
--- a/include/sound/compress_driver.h
+++ b/include/sound/compress_driver.h
@@ -45,6 +45,11 @@ struct snd_compr_runtime {
u64 total_bytes_transferred;
wait_queue_head_t sleep;
void *private_data;
+ /* -- DMA -- */
+ unsigned char *dma_area; /* DMA area */
+ dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
+ size_t dma_bytes; /* size of DMA area */
+ struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
};
/**
@@ -69,6 +74,7 @@ struct snd_compr_stream {
bool metadata_set;
bool next_track;
void *private_data;
+ struct snd_dma_buffer dma_buffer;
};
/**
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 0aa0189..5eee13a 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -487,6 +487,7 @@ struct hdac_stream {
struct snd_pcm_substream *substream; /* assigned substream,
* set in PCM open
*/
+ struct snd_compr_stream *stream;
unsigned int format_val; /* format value to be set in the
* controller and the codec
*/
@@ -500,6 +501,7 @@ struct hdac_stream {
bool no_period_wakeup:1;
bool locked:1;
+ unsigned long curr_pos;
/* timestamp */
unsigned long start_wallclk; /* start + minimum wallclk */
unsigned long period_wallclk; /* wallclk for period */
diff --git a/include/sound/hdaudio_ext.h b/include/sound/hdaudio_ext.h
index f34aced..2d93a03 100644
--- a/include/sound/hdaudio_ext.h
+++ b/include/sound/hdaudio_ext.h
@@ -88,6 +88,10 @@ void snd_hdac_link_free_all(struct hdac_bus *bus);
struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_bus *bus,
struct snd_pcm_substream *substream,
int type);
+struct hdac_ext_stream *
+hdac_ext_host_stream_compr_assign(struct hdac_ext_bus *ebus,
+ struct snd_compr_stream *substream,
+ int direction);
void snd_hdac_ext_stream_release(struct hdac_ext_stream *azx_dev, int type);
void snd_hdac_ext_stream_decouple(struct hdac_bus *bus,
struct hdac_ext_stream *azx_dev, bool decouple);
diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c
index a835558..4bd95f4 100644
--- a/sound/hda/ext/hdac_ext_stream.c
+++ b/sound/hda/ext/hdac_ext_stream.c
@@ -22,6 +22,8 @@
#include <sound/pcm.h>
#include <sound/hda_register.h>
#include <sound/hdaudio_ext.h>
+#include <sound/compress_offload.h>
+#include <sound/compress_driver.h>
/**
* snd_hdac_ext_stream_init - initialize each stream (aka device)
@@ -549,3 +551,44 @@ int snd_hdac_ext_stream_set_lpib(struct hdac_ext_stream *stream, u32 value)
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_lpib);
+struct hdac_ext_stream *
+hdac_ext_host_stream_compr_assign(struct hdac_ext_bus *ebus,
+ struct snd_compr_stream *substream,
+ int direction)
+{
+ struct hdac_ext_stream *res = NULL;
+ struct hdac_stream *stream = NULL;
+ struct hdac_bus *hbus = &ebus->bus;
+
+ if (!hbus->ppcap) {
+ dev_err(hbus->dev, "stream type not supported\n");
+ return NULL;
+ }
+
+ list_for_each_entry(stream, &hbus->stream_list, list) {
+ struct hdac_ext_stream *hstream = container_of(stream,
+ struct hdac_ext_stream,
+ hstream);
+ if (stream->direction != direction)
+ continue;
+
+ if (!stream->opened) {
+ if (!hstream->decoupled)
+ snd_hdac_ext_stream_decouple(ebus,
+ hstream, true);
+ res = hstream;
+ break;
+ }
+ }
+ if (res) {
+ spin_lock_irq(&hbus->reg_lock);
+ res->hstream.opened = 1;
+ res->hstream.running = 0;
+ res->hstream.stream = substream;
+ spin_unlock_irq(&hbus->reg_lock);
+ }
+ dev_dbg(hbus->dev, "Stream tag = %d, index = %d\n",
+ res->hstream.stream_tag, res->hstream.index);
+ return res;
+}
+EXPORT_SYMBOL_GPL(hdac_ext_host_stream_compr_assign);
diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c
index eee4223..d3b1e22 100644
--- a/sound/hda/hdac_stream.c
+++ b/sound/hda/hdac_stream.c
@@ -10,6 +10,7 @@
#include <sound/pcm.h>
#include <sound/hdaudio.h>
#include <sound/hda_register.h>
+#include <sound/compress_driver.h>
#include "trace.h"
/**
@@ -363,11 +364,22 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
{
struct hdac_bus *bus = azx_dev->bus;
struct snd_pcm_substream *substream = azx_dev->substream;
- struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_compr_stream *csubstream = azx_dev->stream;
+ struct snd_pcm_runtime *runtime = NULL;
+ struct snd_compr_runtime *cruntime = NULL;
+ struct snd_dma_buffer *dma_buffer_p = NULL;
__le32 *bdl;
int i, ofs, periods, period_bytes;
int pos_adj, pos_align;
+ if (substream) {
+ runtime = substream->runtime;
+ dma_buffer_p = snd_pcm_get_dma_buf(substream);
+ } else if (csubstream) {
+ cruntime = csubstream->runtime;
+ dma_buffer_p = csubstream->runtime->dma_buffer_p;
+ }
+
/* reset BDL address */
snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);
@@ -381,7 +393,7 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
azx_dev->frags = 0;
pos_adj = bus->bdl_pos_adj;
- if (!azx_dev->no_period_wakeup && pos_adj > 0) {
+ if (!azx_dev->no_period_wakeup && pos_adj > 0 && substream) {
pos_align = pos_adj;
pos_adj = (pos_adj * runtime->rate + 47999) / 48000;
if (!pos_adj)
@@ -395,8 +407,7 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
pos_adj);
pos_adj = 0;
} else {
- ofs = setup_bdle(bus, snd_pcm_get_dma_buf(substream),
- azx_dev,
+ ofs = setup_bdle(bus, dma_buffer_p, azx_dev,
&bdl, ofs, pos_adj, true);
if (ofs < 0)
goto error;
@@ -406,14 +417,12 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
for (i = 0; i < periods; i++) {
if (i == periods - 1 && pos_adj)
- ofs = setup_bdle(bus, snd_pcm_get_dma_buf(substream),
- azx_dev, &bdl, ofs,
- period_bytes - pos_adj, 0);
+ ofs = setup_bdle(bus, dma_buffer_p, azx_dev,
+ &bdl, ofs, period_bytes - pos_adj, 0);
else
- ofs = setup_bdle(bus, snd_pcm_get_dma_buf(substream),
- azx_dev, &bdl, ofs,
- period_bytes,
- !azx_dev->no_period_wakeup);
+ ofs = setup_bdle(bus, dma_buffer_p, azx_dev,
+ &bdl, ofs, period_bytes,
+ !azx_dev->no_period_wakeup);
if (ofs < 0)
goto error;
}
@@ -440,14 +449,21 @@ int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
unsigned int bufsize, period_bytes;
struct snd_pcm_substream *substream = azx_dev->substream;
- struct snd_pcm_runtime *runtime;
+ struct snd_compr_stream *csubstream = azx_dev->stream;
+ struct snd_pcm_runtime *runtime = NULL;
+ struct snd_compr_runtime *cruntime = NULL;
int err;
- if (!substream)
+ if (substream) {
+ runtime = substream->runtime;
+ bufsize = snd_pcm_lib_buffer_bytes(substream);
+ period_bytes = snd_pcm_lib_period_bytes(substream);
+ } else if (csubstream) {
+ cruntime = csubstream->runtime;
+ bufsize = cruntime->buffer_size;
+ period_bytes = cruntime->fragment_size;
+ } else
return -EINVAL;
- runtime = substream->runtime;
- bufsize = snd_pcm_lib_buffer_bytes(substream);
- period_bytes = snd_pcm_lib_period_bytes(substream);
if (bufsize != azx_dev->bufsize ||
period_bytes != azx_dev->period_bytes ||
@@ -456,7 +472,8 @@ int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
azx_dev->bufsize = bufsize;
azx_dev->period_bytes = period_bytes;
azx_dev->format_val = format_val;
- azx_dev->no_period_wakeup = runtime->no_period_wakeup;
+ if (substream)
+ azx_dev->no_period_wakeup = runtime->no_period_wakeup;
err = snd_hdac_stream_setup_periods(azx_dev);
if (err < 0)
return err;
--
2.21.0
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