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ALSA: hda: Introduce HOST stream setup mechanism

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HDAudio stream setup procedure differs between revisions of the
controller device. Currently the differences are handled directly within
AudioDSP platform drivers with if-statements. Implement a more generic
approach and expose a function that a platform driver may use to ensure
the correct procedure is followed each time.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20230926080623.43927-3-cezary.rojewski@intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Cezary Rojewski 2023-09-26 10:06:21 +02:00 committed by Takashi Iwai
parent 2ee2c75c58
commit 88320b74ef
2 changed files with 44 additions and 0 deletions
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3
include/sound/hdaudio_ext.h
View file

@ -60,6 +60,8 @@ struct hdac_ext_stream {
bool link_locked:1;
bool link_prepared;
int (*host_setup)(struct hdac_stream *);
struct snd_pcm_substream *link_substream;
};
@ -86,6 +88,7 @@ void snd_hdac_ext_stream_start(struct hdac_ext_stream *hext_stream);
void snd_hdac_ext_stream_clear(struct hdac_ext_stream *hext_stream);
void snd_hdac_ext_stream_reset(struct hdac_ext_stream *hext_stream);
int snd_hdac_ext_stream_setup(struct hdac_ext_stream *hext_stream, int fmt);
int snd_hdac_ext_host_stream_setup(struct hdac_ext_stream *hext_stream);
struct hdac_ext_link {
struct hdac_bus *bus;

41
sound/hda/ext/hdac_ext_stream.c
View file

@ -10,12 +10,45 @@
*/
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/slab.h>
#include <sound/pcm.h>
#include <sound/hda_register.h>
#include <sound/hdaudio_ext.h>
#include <sound/compress_driver.h>
/**
* snd_hdac_ext_host_stream_setup - Setup a HOST stream.
* @hext_stream: HDAudio stream to set up.
*
* Return: Zero on success or negative error code.
*/
int snd_hdac_ext_host_stream_setup(struct hdac_ext_stream *hext_stream)
{
return hext_stream->host_setup(hdac_stream(hext_stream));
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_host_stream_setup);
/**
* snd_hdac_apl_host_stream_setup - Setup a HOST stream following procedure
* recommended for ApolloLake devices.
* @hstream: HDAudio stream to set up.
*
* Return: Zero on success or negative error code.
*/
static int snd_hdac_apl_host_stream_setup(struct hdac_stream *hstream)
{
struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
int ret;
snd_hdac_ext_stream_decouple(hstream->bus, hext_stream, false);
ret = snd_hdac_stream_setup(hstream);
snd_hdac_ext_stream_decouple(hstream->bus, hext_stream, true);
return ret;
}
/**
* snd_hdac_ext_stream_init - initialize each stream (aka device)
* @bus: HD-audio core bus
@ -55,9 +88,16 @@ static void snd_hdac_ext_stream_init(struct hdac_bus *bus,
int snd_hdac_ext_stream_init_all(struct hdac_bus *bus, int start_idx,
int num_stream, int dir)
{
struct pci_dev *pci = to_pci_dev(bus->dev);
int (*setup_op)(struct hdac_stream *);
int stream_tag = 0;
int i, tag, idx = start_idx;
if (pci->device == PCI_DEVICE_ID_INTEL_HDA_APL)
setup_op = snd_hdac_apl_host_stream_setup;
else
setup_op = snd_hdac_stream_setup;
for (i = 0; i < num_stream; i++) {
struct hdac_ext_stream *hext_stream =
kzalloc(sizeof(*hext_stream), GFP_KERNEL);
@ -66,6 +106,7 @@ int snd_hdac_ext_stream_init_all(struct hdac_bus *bus, int start_idx,
tag = ++stream_tag;
snd_hdac_ext_stream_init(bus, hext_stream, idx, dir, tag);
idx++;
hext_stream->host_setup = setup_op;
}
return 0;