[alsa-devel] [PATCH 4/5] ALSA: hdac: Add support to enable SPIB for hdac ext stream
Pierre-Louis Bossart
pierre-louis.bossart at linux.intel.com
Fri Aug 21 19:38:02 CEST 2015
On 8/21/15 11:06 AM, Vinod Koul wrote:
> From: Jeeja KP <jeeja.kp at intel.com>
>
> 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 at intel.com>
> Signed-off-by: Vinod Koul <vinod.koul at intel.com>
> ---
> include/sound/hda_register.h | 4 +++
> include/sound/hdaudio_ext.h | 10 ++++++++
> sound/hda/ext/hdac_ext_stream.c | 54 +++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 68 insertions(+)
>
> diff --git a/include/sound/hda_register.h b/include/sound/hda_register.h
> index ae995e523ff8..2ae8812d7b1a 100644
> --- a/include/sound/hda_register.h
> +++ b/include/sound/hda_register.h
> @@ -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
> diff --git a/include/sound/hdaudio_ext.h b/include/sound/hdaudio_ext.h
> index 160160d9bffc..9385c99a6504 100644
> --- a/include/sound/hdaudio_ext.h
> +++ b/include/sound/hdaudio_ext.h
> @@ -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);
> diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c
> index b649625f43a4..a4f6bbe5da8f 100644
> --- a/sound/hda/ext/hdac_ext_stream.c
> +++ b/sound/hda/ext/hdac_ext_stream.c
> @@ -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);
> }
> @@ -435,6 +445,50 @@ 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
copy-paste issue, wrong comment
> + * @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);
> +}
weird function name. a set_spbmaxfifo that reads a value? Shouldn't it
be a get?
> +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
> */
>
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