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ALSA: hdac: Add support to enable SPIB for hdac ext stream 

The drivers need to set the spib and maxfifios values, so add
these new APIs snd_hdac_ext_stream_set_spib() and
snd_hdac_ext_stream_set_spbmaxfifo() APIs

For these APIs we also need to have spib and fifos pointer, so
add these to hdac_ext_stream and initialize them at stream init

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
hifive-unleashed-5.1
Jeeja KP 2015-08-21 21:36:20 +05:30 committed by Takashi Iwai
parent c5b0c09b8f
commit ee8bc4df1b
3 changed files with 68 additions and 0 deletions
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4
include/sound/hda_register.h
View File

@ -160,6 +160,10 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 };
#define AZX_SPB_BASE 0x08
/* Interval used to calculate the iterating register offset */
#define AZX_SPB_INTERVAL 0x08
/* SPIB base */
#define AZX_SPB_SPIB 0x00
/* SPIB MAXFIFO base*/
#define AZX_SPB_MAXFIFO 0x04
/* registers of Global Time Synchronization Capability Structure */
#define AZX_GTS_CAP_ID 0x1

10
include/sound/hdaudio_ext.h
View File

@ -63,6 +63,8 @@ enum hdac_ext_stream_type {
* @hstream: hdac_stream
* @pphc_addr: processing pipe host stream pointer
* @pplc_addr: processing pipe link stream pointer
* @spib_addr: software position in buffers stream pointer
* @fifo_addr: software position Max fifos stream pointer
* @decoupled: stream host and link is decoupled
* @link_locked: link is locked
* @link_prepared: link is prepared
@ -74,6 +76,9 @@ struct hdac_ext_stream {
void __iomem *pphc_addr;
void __iomem *pplc_addr;
void __iomem *spib_addr;
void __iomem *fifo_addr;
bool decoupled:1;
bool link_locked:1;
bool link_prepared;
@ -100,6 +105,11 @@ void snd_hdac_ext_stream_decouple(struct hdac_ext_bus *bus,
struct hdac_ext_stream *azx_dev, bool decouple);
void snd_hdac_ext_stop_streams(struct hdac_ext_bus *sbus);
int snd_hdac_ext_stream_set_spib(struct hdac_ext_bus *ebus,
struct hdac_ext_stream *stream, u32 value);
int snd_hdac_ext_stream_set_spbmaxfifo(struct hdac_ext_bus *ebus,
struct hdac_ext_stream *stream);
void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *hstream);
void snd_hdac_ext_link_stream_clear(struct hdac_ext_stream *hstream);
void snd_hdac_ext_link_stream_reset(struct hdac_ext_stream *hstream);

54
sound/hda/ext/hdac_ext_stream.c
View File

@ -49,6 +49,16 @@ void snd_hdac_ext_stream_init(struct hdac_ext_bus *ebus,
AZX_PPLC_INTERVAL * idx;
}
if (ebus->spbcap) {
stream->spib_addr = ebus->spbcap + AZX_SPB_BASE +
AZX_SPB_INTERVAL * idx +
AZX_SPB_SPIB;
stream->fifo_addr = ebus->spbcap + AZX_SPB_BASE +
AZX_SPB_INTERVAL * idx +
AZX_SPB_MAXFIFO;
}
stream->decoupled = false;
snd_hdac_stream_init(bus, &stream->hstream, idx, direction, tag);
}
@ -434,6 +444,50 @@ void snd_hdac_ext_stream_spbcap_enable(struct hdac_ext_bus *ebus,
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_spbcap_enable);
/**
* snd_hdac_ext_stream_set_spib - sets the spib value of a stream
* @ebus: HD-audio ext core bus
* @stream: hdac_ext_stream
* @value: spib value to set
*/
int snd_hdac_ext_stream_set_spib(struct hdac_ext_bus *ebus,
struct hdac_ext_stream *stream, u32 value)
{
struct hdac_bus *bus = &ebus->bus;
if (!ebus->spbcap) {
dev_err(bus->dev, "Address of SPB capability is NULL");
return -EINVAL;
}
writel(value, stream->spib_addr);
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_spib);
/**
* snd_hdac_ext_stream_set_spbmaxfifo - sets the spib value of a stream
* @ebus: HD-audio ext core bus
* @stream: hdac_ext_stream
*
* Return maxfifo for the stream
*/
int snd_hdac_ext_stream_set_spbmaxfifo(struct hdac_ext_bus *ebus,
struct hdac_ext_stream *stream)
{
struct hdac_bus *bus = &ebus->bus;
if (!ebus->spbcap) {
dev_err(bus->dev, "Address of SPB capability is NULL");
return -EINVAL;
}
return readl(stream->fifo_addr);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_spbmaxfifo);
/**
* snd_hdac_ext_stop_streams - stop all stream if running
* @ebus: HD-audio ext core bus