From f9a376c3f6d77e59d41350901b2bafbaf8791df0 Mon Sep 17 00:00:00 2001 From: Eliot Blennerhassett Date: Thu, 20 Nov 2014 16:22:53 +1300 Subject: ALSA: asihpi: Add support for stream interrupt. Some cards have a so-called low-latency mode, in which they present a single multichannel stream with no mixing or samplerate conversion. In this mode the card can generate an interrupt per internal processing block (typically 32 or 64 frames) Signed-off-by: Eliot Blennerhassett Signed-off-by: Takashi Iwai --- sound/pci/asihpi/asihpi.c | 177 ++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 148 insertions(+), 29 deletions(-) (limited to 'sound/pci/asihpi/asihpi.c') diff --git a/sound/pci/asihpi/asihpi.c b/sound/pci/asihpi/asihpi.c index c06903304e12..ae29f30547cc 100644 --- a/sound/pci/asihpi/asihpi.c +++ b/sound/pci/asihpi/asihpi.c @@ -1,6 +1,6 @@ /* * Asihpi soundcard - * Copyright (c) by AudioScience Inc + * Copyright (c) by AudioScience Inc * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as @@ -124,6 +124,16 @@ struct snd_card_asihpi { struct pci_dev *pci; struct hpi_adapter *hpi; + /* In low latency mode there is only one stream, a pointer to its + * private data is stored here on trigger and cleared on stop. + * The interrupt handler uses it as a parameter when calling + * snd_card_asihpi_timer_function(). + */ + struct snd_card_asihpi_pcm *llmode_streampriv; + struct tasklet_struct t; + void (*pcm_start)(struct snd_pcm_substream *substream); + void (*pcm_stop)(struct snd_pcm_substream *substream); + u32 h_mixer; struct clk_cache cc; @@ -544,6 +554,48 @@ static void snd_card_asihpi_pcm_timer_stop(struct snd_pcm_substream *substream) del_timer(&dpcm->timer); } +static void snd_card_asihpi_pcm_int_start(struct snd_pcm_substream *substream) +{ + struct snd_card_asihpi_pcm *dpcm; + struct snd_card_asihpi *card; + + BUG_ON(!substream); + + dpcm = (struct snd_card_asihpi_pcm *)substream->runtime->private_data; + card = snd_pcm_substream_chip(substream); + + BUG_ON(in_interrupt()); + tasklet_disable(&card->t); + card->llmode_streampriv = dpcm; + tasklet_enable(&card->t); + + hpi_handle_error(hpi_adapter_set_property(card->hpi->adapter->index, + HPI_ADAPTER_PROPERTY_IRQ_RATE, + card->update_interval_frames, 0)); +} + +static void snd_card_asihpi_pcm_int_stop(struct snd_pcm_substream *substream) +{ + struct snd_card_asihpi_pcm *dpcm; + struct snd_card_asihpi *card; + + BUG_ON(!substream); + + dpcm = (struct snd_card_asihpi_pcm *)substream->runtime->private_data; + card = snd_pcm_substream_chip(substream); + + hpi_handle_error(hpi_adapter_set_property(card->hpi->adapter->index, + HPI_ADAPTER_PROPERTY_IRQ_RATE, 0, 0)); + + if (in_interrupt()) + card->llmode_streampriv = NULL; + else { + tasklet_disable(&card->t); + card->llmode_streampriv = NULL; + tasklet_enable(&card->t); + } +} + static int snd_card_asihpi_trigger(struct snd_pcm_substream *substream, int cmd) { @@ -602,7 +654,7 @@ static int snd_card_asihpi_trigger(struct snd_pcm_substream *substream, break; } /* start the master stream */ - snd_card_asihpi_pcm_timer_start(substream); + card->pcm_start(substream); if ((substream->stream == SNDRV_PCM_STREAM_CAPTURE) || !card->can_dma) hpi_handle_error(hpi_stream_start(dpcm->h_stream)); @@ -610,7 +662,7 @@ static int snd_card_asihpi_trigger(struct snd_pcm_substream *substream, case SNDRV_PCM_TRIGGER_STOP: snd_printdd("%s trigger stop\n", name); - snd_card_asihpi_pcm_timer_stop(substream); + card->pcm_stop(substream); snd_pcm_group_for_each_entry(s, substream) { if (snd_pcm_substream_chip(s) != card) continue; @@ -641,12 +693,12 @@ static int snd_card_asihpi_trigger(struct snd_pcm_substream *substream, case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: snd_printdd("%s trigger pause release\n", name); + card->pcm_start(substream); hpi_handle_error(hpi_stream_start(dpcm->h_stream)); - snd_card_asihpi_pcm_timer_start(substream); break; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: snd_printdd("%s trigger pause push\n", name); - snd_card_asihpi_pcm_timer_stop(substream); + card->pcm_stop(substream); hpi_handle_error(hpi_stream_stop(dpcm->h_stream)); break; default: @@ -718,8 +770,8 @@ static void snd_card_asihpi_timer_function(unsigned long data) u32 buffer_size, bytes_avail, samples_played, on_card_bytes; char name[16]; - snd_pcm_debug_name(substream, name, sizeof(name)); + snd_pcm_debug_name(substream, name, sizeof(name)); /* find minimum newdata and buffer pos in group */ snd_pcm_group_for_each_entry(s, substream) { @@ -779,7 +831,8 @@ static void snd_card_asihpi_timer_function(unsigned long data) newdata); } - snd_printddd("timer1, %s, %d, S=%d, elap=%d, rw=%d, dsp=%d, left=%d, aux=%d, space=%d, hw_ptr=%ld, appl_ptr=%ld\n", + snd_printddd( + "timer1, %s, %d, S=%d, elap=%d, rw=%d, dsp=%d, left=%d, aux=%d, space=%d, hw_ptr=%ld, appl_ptr=%ld\n", name, s->number, state, ds->pcm_buf_elapsed_dma_ofs, ds->pcm_buf_host_rw_ofs, @@ -815,11 +868,13 @@ static void snd_card_asihpi_timer_function(unsigned long data) snd_pcm_group_for_each_entry(s, substream) { struct snd_card_asihpi_pcm *ds = s->runtime->private_data; + runtime = s->runtime; /* don't link Cap and Play */ if (substream->stream != s->stream) continue; + /* Store dma offset for use by pointer callback */ ds->pcm_buf_dma_ofs = pcm_buf_dma_ofs; if (xfercount && @@ -878,16 +933,38 @@ static void snd_card_asihpi_timer_function(unsigned long data) pd, xfer2)); } } + /* ? host_rw_ofs always ahead of elapsed_dma_ofs by preload size? */ ds->pcm_buf_host_rw_ofs += xfercount; ds->pcm_buf_elapsed_dma_ofs += xfercount; snd_pcm_period_elapsed(s); } } - if (dpcm->respawn_timer) + if (!card->hpi->interrupt_mode && dpcm->respawn_timer) add_timer(&dpcm->timer); } +static void snd_card_asihpi_int_task(unsigned long data) +{ + struct hpi_adapter *a = (struct hpi_adapter *)data; + struct snd_card_asihpi *asihpi; + + WARN_ON(!a || !a->snd_card || !a->snd_card->private_data); + asihpi = (struct snd_card_asihpi *)a->snd_card->private_data; + if (asihpi->llmode_streampriv) + snd_card_asihpi_timer_function( + (unsigned long)asihpi->llmode_streampriv); +} + +static void snd_card_asihpi_isr(struct hpi_adapter *a) +{ + struct snd_card_asihpi *asihpi; + + WARN_ON(!a || !a->snd_card || !a->snd_card->private_data); + asihpi = (struct snd_card_asihpi *)a->snd_card->private_data; + tasklet_schedule(&asihpi->t); +} + /***************************** PLAYBACK OPS ****************/ static int snd_card_asihpi_playback_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg) @@ -995,13 +1072,22 @@ static int snd_card_asihpi_playback_open(struct snd_pcm_substream *substream) runtime->private_free = snd_card_asihpi_runtime_free; memset(&snd_card_asihpi_playback, 0, sizeof(snd_card_asihpi_playback)); - snd_card_asihpi_playback.buffer_bytes_max = BUFFER_BYTES_MAX; - snd_card_asihpi_playback.period_bytes_min = PERIOD_BYTES_MIN; - /*?snd_card_asihpi_playback.period_bytes_min = - card->out_max_chans * 4096; */ - snd_card_asihpi_playback.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN; - snd_card_asihpi_playback.periods_min = PERIODS_MIN; - snd_card_asihpi_playback.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN; + if (!card->hpi->interrupt_mode) { + snd_card_asihpi_playback.buffer_bytes_max = BUFFER_BYTES_MAX; + snd_card_asihpi_playback.period_bytes_min = PERIOD_BYTES_MIN; + snd_card_asihpi_playback.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN; + snd_card_asihpi_playback.periods_min = PERIODS_MIN; + snd_card_asihpi_playback.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN; + } else { + size_t pbmin = card->update_interval_frames * + card->out_max_chans; + snd_card_asihpi_playback.buffer_bytes_max = BUFFER_BYTES_MAX; + snd_card_asihpi_playback.period_bytes_min = pbmin; + snd_card_asihpi_playback.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN; + snd_card_asihpi_playback.periods_min = PERIODS_MIN; + snd_card_asihpi_playback.periods_max = BUFFER_BYTES_MAX / pbmin; + } + /* snd_card_asihpi_playback.fifo_size = 0; */ snd_card_asihpi_playback.channels_max = card->out_max_chans; snd_card_asihpi_playback.channels_min = card->out_min_chans; @@ -1036,7 +1122,7 @@ static int snd_card_asihpi_playback_open(struct snd_pcm_substream *substream) card->update_interval_frames); snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, - card->update_interval_frames * 2, UINT_MAX); + card->update_interval_frames, UINT_MAX); snd_printdd("playback open\n"); @@ -1102,8 +1188,6 @@ static int snd_card_asihpi_capture_prepare(struct snd_pcm_substream *substream) return 0; } - - static u64 snd_card_asihpi_capture_formats(struct snd_card_asihpi *asihpi, u32 h_stream) { @@ -1170,11 +1254,21 @@ static int snd_card_asihpi_capture_open(struct snd_pcm_substream *substream) runtime->private_free = snd_card_asihpi_runtime_free; memset(&snd_card_asihpi_capture, 0, sizeof(snd_card_asihpi_capture)); - snd_card_asihpi_capture.buffer_bytes_max = BUFFER_BYTES_MAX; - snd_card_asihpi_capture.period_bytes_min = PERIOD_BYTES_MIN; - snd_card_asihpi_capture.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN; - snd_card_asihpi_capture.periods_min = PERIODS_MIN; - snd_card_asihpi_capture.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN; + if (!card->hpi->interrupt_mode) { + snd_card_asihpi_capture.buffer_bytes_max = BUFFER_BYTES_MAX; + snd_card_asihpi_capture.period_bytes_min = PERIOD_BYTES_MIN; + snd_card_asihpi_capture.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN; + snd_card_asihpi_capture.periods_min = PERIODS_MIN; + snd_card_asihpi_capture.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN; + } else { + size_t pbmin = card->update_interval_frames * + card->out_max_chans; + snd_card_asihpi_capture.buffer_bytes_max = BUFFER_BYTES_MAX; + snd_card_asihpi_capture.period_bytes_min = pbmin; + snd_card_asihpi_capture.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN; + snd_card_asihpi_capture.periods_min = PERIODS_MIN; + snd_card_asihpi_capture.periods_max = BUFFER_BYTES_MAX / pbmin; + } /* snd_card_asihpi_capture.fifo_size = 0; */ snd_card_asihpi_capture.channels_max = card->in_max_chans; snd_card_asihpi_capture.channels_min = card->in_min_chans; @@ -1199,7 +1293,7 @@ static int snd_card_asihpi_capture_open(struct snd_pcm_substream *substream) snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, card->update_interval_frames); snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, - card->update_interval_frames * 2, UINT_MAX); + card->update_interval_frames, UINT_MAX); snd_pcm_set_sync(substream); @@ -2444,15 +2538,19 @@ static int snd_asihpi_clkrate_get(struct snd_kcontrol *kcontrol, static int snd_asihpi_sampleclock_add(struct snd_card_asihpi *asihpi, struct hpi_control *hpi_ctl) { - struct snd_card *card = asihpi->card; + struct snd_card *card; struct snd_kcontrol_new snd_control; - struct clk_cache *clkcache = &asihpi->cc; + struct clk_cache *clkcache; u32 hSC = hpi_ctl->h_control; int has_aes_in = 0; int i, j; u16 source; + if (snd_BUG_ON(!asihpi)) + return -EINVAL; + card = asihpi->card; + clkcache = &asihpi->cc; snd_control.private_value = hpi_ctl->h_control; clkcache->has_local = 0; @@ -2808,6 +2906,7 @@ static int snd_asihpi_probe(struct pci_dev *pci_dev, asihpi->card = card; asihpi->pci = pci_dev; asihpi->hpi = hpi; + hpi->snd_card = card; snd_printk(KERN_INFO "adapter ID=%4X index=%d\n", asihpi->hpi->adapter->type, adapter_index); @@ -2830,8 +2929,16 @@ static int snd_asihpi_probe(struct pci_dev *pci_dev, if (err) asihpi->update_interval_frames = 512; - if (!asihpi->can_dma) - asihpi->update_interval_frames *= 2; + if (hpi->interrupt_mode) { + asihpi->pcm_start = snd_card_asihpi_pcm_int_start; + asihpi->pcm_stop = snd_card_asihpi_pcm_int_stop; + tasklet_init(&asihpi->t, snd_card_asihpi_int_task, + (unsigned long)hpi); + hpi->interrupt_callback = snd_card_asihpi_isr; + } else { + asihpi->pcm_start = snd_card_asihpi_pcm_timer_start; + asihpi->pcm_stop = snd_card_asihpi_pcm_timer_stop; + } hpi_handle_error(hpi_instream_open(adapter_index, 0, &h_stream)); @@ -2841,6 +2948,9 @@ static int snd_asihpi_probe(struct pci_dev *pci_dev, hpi_handle_error(hpi_instream_close(h_stream)); + if (!asihpi->can_dma) + asihpi->update_interval_frames *= 2; + err = hpi_adapter_get_property(adapter_index, HPI_ADAPTER_PROPERTY_CURCHANNELS, &asihpi->in_max_chans, &asihpi->out_max_chans); @@ -2900,7 +3010,6 @@ static int snd_asihpi_probe(struct pci_dev *pci_dev, err = snd_card_register(card); if (!err) { - hpi->snd_card = card; dev++; return 0; } @@ -2914,6 +3023,16 @@ __nodev: static void snd_asihpi_remove(struct pci_dev *pci_dev) { struct hpi_adapter *hpi = pci_get_drvdata(pci_dev); + struct snd_card_asihpi *asihpi = hpi->snd_card->private_data; + + /* Stop interrupts */ + if (hpi->interrupt_mode) { + hpi->interrupt_callback = NULL; + hpi_handle_error(hpi_adapter_set_property(hpi->adapter->index, + HPI_ADAPTER_PROPERTY_IRQ_RATE, 0, 0)); + tasklet_kill(&asihpi->t); + } + snd_card_free(hpi->snd_card); hpi->snd_card = NULL; asihpi_adapter_remove(pci_dev); -- cgit