From: Jeeja KP jeeja.kp@intel.com
This patch starts to add the Skylake HDA platform driver by defining SoC cpu dais, DMA driver ops and implements ALSA operations
Signed-off-by: Jeeja KP jeeja.kp@intel.com Signed-off-by: Subhransu S. Prusty subhransu.s.prusty@intel.com Signed-off-by: Vinod Koul vinod.koul@intel.com --- sound/soc/intel/skylake/hda-skl-pcm.c | 584 +++++++++++++++++++++++++++++++++ 1 file changed, 584 insertions(+) create mode 100644 sound/soc/intel/skylake/hda-skl-pcm.c
diff --git a/sound/soc/intel/skylake/hda-skl-pcm.c b/sound/soc/intel/skylake/hda-skl-pcm.c new file mode 100644 index 000000000000..e4d1650b49f5 --- /dev/null +++ b/sound/soc/intel/skylake/hda-skl-pcm.c @@ -0,0 +1,584 @@ +/* + * hda-skl-pcm.c -ASoC HDA Platform driver file implementing PCM functionality + * + * Copyright (C) 2014-2015 Intel Corp + * Author: Jeeja KP jeeja.kp@intel.com + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + */ +#include <linux/pci.h> +#include <linux/pm_runtime.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include "hda-skl.h" + +#define HDA_MONO 1 +#define HDA_STEREO 2 + +static struct snd_pcm_hardware azx_pcm_hw = { + .info = (SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP_VALID | + /* No full-resume yet implemented */ + /* SNDRV_PCM_INFO_RESUME |*/ + SNDRV_PCM_INFO_PAUSE | + SNDRV_PCM_INFO_SYNC_START | + SNDRV_PCM_INFO_HAS_WALL_CLOCK | /* legacy */ + SNDRV_PCM_INFO_HAS_LINK_ATIME | + SNDRV_PCM_INFO_NO_PERIOD_WAKEUP), + .formats = SNDRV_PCM_FMTBIT_S16_LE, + .rates = SNDRV_PCM_RATE_48000, + .rate_min = 48000, + .rate_max = 48000, + .channels_min = 2, + .channels_max = 2, + .buffer_bytes_max = AZX_MAX_BUF_SIZE, + .period_bytes_min = 128, + .period_bytes_max = AZX_MAX_BUF_SIZE / 2, + .periods_min = 2, + .periods_max = AZX_MAX_FRAG, + .fifo_size = 0, +}; + +static inline +struct soc_hdac_stream *get_hdac_stream(struct snd_pcm_substream *substream) +{ + return substream->runtime->private_data; +} + +static struct soc_hdac_bus *get_bus_ctx(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream); + struct device *dev = rtd->cpu_dai->dev; + struct soc_hdac_bus *sbus = dev_get_drvdata(dev); + + return sbus; +} + +static int substream_alloc_pages(struct soc_hdac_bus *sbus, + struct snd_pcm_substream *substream, + size_t size) +{ + struct soc_hdac_stream *stream = get_hdac_stream(substream); + int ret; + + hdac_stream(stream)->bufsize = 0; + hdac_stream(stream)->period_bytes = 0; + hdac_stream(stream)->format_val = 0; + ret = snd_pcm_lib_malloc_pages(substream, size); + if (ret < 0) + return ret; + return 0; +} + +static int substream_free_pages(struct hdac_bus *bus, + struct snd_pcm_substream *substream) +{ + return snd_pcm_lib_free_pages(substream); +} + +static void soc_hda_set_pcm_constrains(struct soc_hdac_bus *sbus, + struct snd_pcm_runtime *runtime) +{ + snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); + + /* avoid wrap-around with wall-clock */ + snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_TIME, + 20, 178000000); +} + +static int soc_hda_pcm_open(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct soc_hdac_bus *sbus = dev_get_drvdata(dai->dev); + struct soc_hdac_stream *stream; + struct snd_pcm_runtime *runtime = substream->runtime; + struct soc_hda_dma_params *dma_params; + + dev_dbg(dai->dev, "%s: %s\n", __func__, dai->name); + pm_runtime_get_sync(dai->dev); + + stream = snd_soc_hdac_stream_assign(sbus, substream, + HDAC_STREAM_TYPE_COUPLED); + if (stream == NULL) + return -EBUSY; + + soc_hda_set_pcm_constrains(sbus, runtime); + + /* + * disable WALLCLOCK timestamps for capture streams + * until we figure out how to handle digital inputs + */ + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { + runtime->hw.info &= ~SNDRV_PCM_INFO_HAS_WALL_CLOCK; /* legacy */ + runtime->hw.info &= ~SNDRV_PCM_INFO_HAS_LINK_ATIME; + } + + runtime->private_data = stream; + + dma_params = kzalloc(sizeof(*dma_params), GFP_KERNEL); + if (!dma_params) + return -ENOMEM; + + dma_params->stream_tag = hdac_stream(stream)->stream_tag; + snd_soc_dai_set_dma_data(dai, substream, (void *)dma_params); + + dev_dbg(dai->dev, "stream tag set in dma params=%d\n", + dma_params->stream_tag); + snd_pcm_set_sync(substream); + + return 0; +} + +static int hda_get_format(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream); + struct soc_hda_dma_params *dma_params; + int format_val = 0; + struct snd_soc_dai *codec_dai = rtd->codec_dai; + + dma_params = (struct soc_hda_dma_params *) + snd_soc_dai_get_dma_data(codec_dai, substream); + + if (!dma_params) + format_val = dma_params->format; + + return format_val; +} + +static int soc_hda_pcm_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct soc_hdac_stream *stream = get_hdac_stream(substream); + unsigned int format_val; + int err; + + dev_dbg(dai->dev, "%s: %s\n", __func__, dai->name); + if (hdac_stream(stream)->prepared) { + dev_dbg(dai->dev, "already stream is prepared - returning\n"); + return 0; + } + + format_val = hda_get_format(substream, dai); + dev_dbg(dai->dev, "stream_tag=%d formatvalue=%d\n", + hdac_stream(stream)->stream_tag, format_val); + snd_hdac_stream_reset(hdac_stream(stream)); + + err = snd_hdac_stream_set_params(hdac_stream(stream), format_val); + + if (err < 0) + return err; + + snd_hdac_stream_setup(hdac_stream(stream)); + hdac_stream(stream)->prepared = 1; + return err; +} + +static int soc_hda_pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct soc_hdac_bus *sbus = dev_get_drvdata(dai->dev); + struct snd_pcm_runtime *runtime = substream->runtime; + int ret = 0; + + dev_dbg(dai->dev, "%s: %s\n", __func__, dai->name); + ret = substream_alloc_pages(sbus, substream, + params_buffer_bytes(params)); + + if (ret < 0) + return ret; + + if (substream->runtime->dma_area) + memset(substream->runtime->dma_area, 0, + params_buffer_bytes(params)); + + dev_dbg(dai->dev, "format_val, rate=%d, ch=%d, format=%d\n", + runtime->rate, runtime->channels, runtime->format); + + return ret; +} + +static void soc_hda_pcm_close(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct soc_hdac_stream *stream = get_hdac_stream(substream); + struct soc_hda_dma_params *dma_params = NULL; + + dev_dbg(dai->dev, "%s: %s\n", __func__, dai->name); + snd_soc_hdac_stream_release(stream, HDAC_STREAM_TYPE_COUPLED); + + dma_params = (struct soc_hda_dma_params *) + snd_soc_dai_get_dma_data(dai, substream); + pm_runtime_mark_last_busy(dai->dev); + pm_runtime_put_autosuspend(dai->dev); + kfree(dma_params); +} + +static int soc_hda_pcm_hw_free(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct soc_hdac_bus *sbus = dev_get_drvdata(dai->dev); + struct soc_hdac_stream *stream = get_hdac_stream(substream); + + dev_dbg(dai->dev, "%s: %s\n", __func__, dai->name); + + snd_hdac_stream_cleanup(hdac_stream(stream)); + hdac_stream(stream)->prepared = 0; + + return substream_free_pages(hdac_bus(sbus), substream); +} + +static struct snd_soc_dai_ops hda_pcm_dai_ops = { + .startup = soc_hda_pcm_open, + .shutdown = soc_hda_pcm_close, + .prepare = soc_hda_pcm_prepare, + .hw_params = soc_hda_pcm_hw_params, + .hw_free = soc_hda_pcm_hw_free, +}; + +static struct snd_soc_dai_driver soc_hda_platform_dai[] = { +{ + .name = "System Pin", + .ops = &hda_pcm_dai_ops, + .playback = { + .stream_name = "System Playback", + .channels_min = HDA_MONO, + .channels_max = HDA_STEREO, + .rates = SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_8000, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + }, + .capture = { + .stream_name = "System Capture", + .channels_min = HDA_MONO, + .channels_max = HDA_STEREO, + .rates = SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_16000, + .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, + }, +}, +{ + .name = "Deepbuffer Pin", + .ops = &hda_pcm_dai_ops, + .playback = { + .stream_name = "Deepbuffer Playback", + .channels_min = HDA_STEREO, + .channels_max = HDA_STEREO, + .rates = SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + }, +}, +{ + .name = "LowLatency Pin", + .ops = &hda_pcm_dai_ops, + .playback = { + .stream_name = "Low Latency Playback", + .channels_min = HDA_STEREO, + .channels_max = HDA_STEREO, + .rates = SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + }, +}, +}; + +static int soc_hda_platform_open(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime; + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai_link *dai_link = rtd->dai_link; + + dev_dbg(rtd->cpu_dai->dev, "In %s:%s\n", __func__, + dai_link->cpu_dai_name); + + runtime = substream->runtime; + snd_soc_set_runtime_hwparams(substream, &azx_pcm_hw); + return 0; +} + +static int soc_hda_platform_pcm_trigger(struct snd_pcm_substream *substream, + int cmd) +{ + struct soc_hdac_bus *sbus = get_bus_ctx(substream); + struct hdac_bus *bus = hdac_bus(sbus); + struct soc_hdac_stream *stream; + struct snd_pcm_substream *s; + bool start; + int sbits = 0; + unsigned long cookie; + struct hdac_stream *hstr; + + stream = get_hdac_stream(substream); + hstr = hdac_stream(stream); + + dev_dbg(bus->dev, "In %s cmd=%d\n", __func__, cmd); + + if (!hstr->prepared) + return -EPIPE; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + case SNDRV_PCM_TRIGGER_RESUME: + start = true; + break; + + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_STOP: + start = false; + break; + + default: + return -EINVAL; + } + + snd_pcm_group_for_each_entry(s, substream) { + if (s->pcm->card != substream->pcm->card) + continue; + stream = get_hdac_stream(s); + sbits |= 1 << hdac_stream(stream)->index; + snd_pcm_trigger_done(s, substream); + } + + spin_lock_irqsave(&bus->reg_lock, cookie); + + /* first, set SYNC bits of corresponding streams */ + snd_hdac_stream_sync_trigger(hstr, true, sbits, AZX_REG_SSYNC); + + snd_pcm_group_for_each_entry(s, substream) { + if (s->pcm->card != substream->pcm->card) + continue; + stream = get_hdac_stream(s); + if (start) + snd_hdac_stream_start(hdac_stream(stream), true); + else + snd_hdac_stream_stop(hdac_stream(stream)); + } + spin_unlock_irqrestore(&bus->reg_lock, cookie); + + snd_hdac_stream_sync(hstr, start, sbits); + + spin_lock_irqsave(&bus->reg_lock, cookie); + + /* reset SYNC bits */ + snd_hdac_stream_sync_trigger(hstr, false, sbits, AZX_REG_SSYNC); + if (start) + snd_hdac_stream_timecounter_init(hstr, sbits); + spin_unlock_irqrestore(&bus->reg_lock, cookie); + return 0; +} + +/* calculate runtime delay from LPIB */ +static int hda_get_delay_from_lpib(struct soc_hdac_bus *sbus, + struct soc_hdac_stream *sstream, + unsigned int pos) +{ + struct hdac_bus *bus = hdac_bus(sbus); + struct hdac_stream *hstream = hdac_stream(sstream); + struct snd_pcm_substream *substream = hstream->substream; + int stream = substream->stream; + unsigned int lpib_pos = snd_hdac_stream_get_pos_lpib(hstream); + int delay; + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) + delay = pos - lpib_pos; + else + delay = lpib_pos - pos; + if (delay < 0) { + if (delay >= hstream->delay_negative_threshold) + delay = 0; + else + delay += hstream->bufsize; + } + + if (delay >= hstream->period_bytes) { + dev_info(bus->dev, + "Unstable LPIB (%d >= %d); disabling LPIB delay counting\n", + delay, hstream->period_bytes); + delay = 0; + } + + return bytes_to_frames(substream->runtime, delay); +} + +static unsigned int hda_get_position(struct soc_hdac_stream *hstream, + int codec_delay) +{ + struct hdac_stream *hstr = hdac_stream(hstream); + struct snd_pcm_substream *substream = hstr->substream; + struct soc_hdac_bus *sbus = get_bus_ctx(substream); + unsigned int pos; + int delay = 0; + + /* use the position buffer as default */ + pos = snd_hdac_stream_get_pos_posbuf(hdac_stream(hstream)); + + if (pos >= hdac_stream(hstream)->bufsize) + pos = 0; + + if (substream->runtime) { + delay = hda_get_delay_from_lpib(sbus, hstream, pos) + + codec_delay; + substream->runtime->delay += delay; + } + + return pos; +} + +static snd_pcm_uframes_t soc_hda_platform_pcm_pointer + (struct snd_pcm_substream *substream) +{ + struct soc_hdac_stream *hstream = get_hdac_stream(substream); + + return bytes_to_frames(substream->runtime, + hda_get_position(hstream, 0)); +} + +static u64 soc_azx_adjust_codec_delay(struct snd_pcm_substream *substream, + u64 nsec) +{ + struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream); + struct snd_soc_dai *codec_dai = rtd->codec_dai; + u64 codec_frames, codec_nsecs; + + if (!codec_dai->driver->ops->delay) + return nsec; + + codec_frames = codec_dai->driver->ops->delay(substream, codec_dai); + codec_nsecs = div_u64(codec_frames * 1000000000LL, + substream->runtime->rate); + + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + return nsec + codec_nsecs; + + return (nsec > codec_nsecs) ? nsec - codec_nsecs : 0; +} + +static int soc_hda_get_time_info(struct snd_pcm_substream *substream, + struct timespec *system_ts, struct timespec *audio_ts, + struct snd_pcm_audio_tstamp_config *audio_tstamp_config, + struct snd_pcm_audio_tstamp_report *audio_tstamp_report) +{ + struct soc_hdac_stream *sstream = get_hdac_stream(substream); + struct hdac_stream *hstr = hdac_stream(sstream); + u64 nsec; + + if ((substream->runtime->hw.info & SNDRV_PCM_INFO_HAS_LINK_ATIME) && + (audio_tstamp_config->type_requested == SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK)) { + + snd_pcm_gettime(substream->runtime, system_ts); + + nsec = timecounter_read(&hstr->tc); + nsec = div_u64(nsec, 3); /* can be optimized */ + if (audio_tstamp_config->report_delay) + nsec = soc_azx_adjust_codec_delay(substream, nsec); + + *audio_ts = ns_to_timespec(nsec); + + audio_tstamp_report->actual_type = SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK; + audio_tstamp_report->accuracy_report = 1; /* rest of struct is valid */ + audio_tstamp_report->accuracy = 42; /* 24MHzWallClk == 42ns resolution */ + + } else + audio_tstamp_report->actual_type = SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT; + + return 0; +} + +static struct snd_pcm_ops soc_hda_platform_ops = { + .open = soc_hda_platform_open, + .ioctl = snd_pcm_lib_ioctl, + .trigger = soc_hda_platform_pcm_trigger, + .pointer = soc_hda_platform_pcm_pointer, + .get_time_info = soc_hda_get_time_info, + .mmap = snd_pcm_lib_default_mmap, + .page = snd_pcm_sgbuf_ops_page, +}; + +static void soc_hda_pcm_free(struct snd_pcm *pcm) +{ + snd_pcm_lib_preallocate_free_for_all(pcm); +} + +#define MAX_PREALLOC_SIZE (32 * 1024 * 1024) + +static int soc_hda_pcm_new(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_dai *dai = rtd->cpu_dai; + struct soc_hdac_bus *sbus = dev_get_drvdata(dai->dev); + struct snd_pcm *pcm = rtd->pcm; + unsigned int size; + int retval = 0; + struct hda_skl *hda = to_hda_skl(sbus); + + dev_dbg(dai->dev, "In %s\n", __func__); + if (dai->driver->playback.channels_min || + dai->driver->capture.channels_min) { + /* buffer pre-allocation */ + size = CONFIG_SND_SOC_HDA_PREALLOC_SIZE * 1024; + if (size > MAX_PREALLOC_SIZE) + size = MAX_PREALLOC_SIZE; + retval = snd_pcm_lib_preallocate_pages_for_all(pcm, + SNDRV_DMA_TYPE_DEV_SG, + snd_dma_pci_data(hda->pci), + size, MAX_PREALLOC_SIZE); + if (retval) { + dev_err(dai->dev, "dma buffer allocationf fail\n"); + return retval; + } + } + return retval; +} + +static struct snd_soc_platform_driver soc_hda_platform_drv = { + .ops = &soc_hda_platform_ops, + .pcm_new = soc_hda_pcm_new, + .pcm_free = soc_hda_pcm_free, +}; + +static const struct snd_soc_component_driver soc_hda_component = { + .name = "pcm", +}; + +int soc_hda_platform_register(struct device *dev) +{ + int ret = 0; + + ret = snd_soc_register_platform(dev, &soc_hda_platform_drv); + if (ret) { + dev_err(dev, "soc platform registration failed %d\n", ret); + return ret; + } + ret = snd_soc_register_component(dev, &soc_hda_component, + soc_hda_platform_dai, + ARRAY_SIZE(soc_hda_platform_dai)); + if (ret) { + dev_err(dev, "soc component registration failed %d\n", ret); + snd_soc_unregister_platform(dev); + } + + return ret; + +} + +int soc_hda_platform_unregister(struct device *dev) +{ + snd_soc_unregister_component(dev); + snd_soc_unregister_platform(dev); + return 0; +}