![Thomas Gleixner](/assets/img/avatar_default.png)
There is no point in having an extra type for extra confusion. u64 is unambiguous. Conversion was done with the following coccinelle script: @rem@ @@ -typedef u64 cycle_t; @fix@ typedef cycle_t; @@ -cycle_t +u64 Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: John Stultz <john.stultz@linaro.org>
721 lines
19 KiB
C
721 lines
19 KiB
C
/*
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* HD-audio stream operations
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*/
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/export.h>
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#include <linux/clocksource.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/hdaudio.h>
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#include <sound/hda_register.h>
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#include "trace.h"
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/**
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* snd_hdac_stream_init - initialize each stream (aka device)
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* @bus: HD-audio core bus
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* @azx_dev: HD-audio core stream object to initialize
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* @idx: stream index number
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* @direction: stream direction (SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE)
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* @tag: the tag id to assign
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*
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* Assign the starting bdl address to each stream (device) and initialize.
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*/
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void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
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int idx, int direction, int tag)
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{
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azx_dev->bus = bus;
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/* offset: SDI0=0x80, SDI1=0xa0, ... SDO3=0x160 */
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azx_dev->sd_addr = bus->remap_addr + (0x20 * idx + 0x80);
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/* int mask: SDI0=0x01, SDI1=0x02, ... SDO3=0x80 */
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azx_dev->sd_int_sta_mask = 1 << idx;
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azx_dev->index = idx;
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azx_dev->direction = direction;
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azx_dev->stream_tag = tag;
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snd_hdac_dsp_lock_init(azx_dev);
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list_add_tail(&azx_dev->list, &bus->stream_list);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_init);
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/**
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* snd_hdac_stream_start - start a stream
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* @azx_dev: HD-audio core stream to start
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* @fresh_start: false = wallclock timestamp relative to period wallclock
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*
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* Start a stream, set start_wallclk and set the running flag.
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*/
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void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start)
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{
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struct hdac_bus *bus = azx_dev->bus;
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trace_snd_hdac_stream_start(bus, azx_dev);
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azx_dev->start_wallclk = snd_hdac_chip_readl(bus, WALLCLK);
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if (!fresh_start)
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azx_dev->start_wallclk -= azx_dev->period_wallclk;
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/* enable SIE */
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snd_hdac_chip_updatel(bus, INTCTL, 0, 1 << azx_dev->index);
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/* set DMA start and interrupt mask */
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snd_hdac_stream_updateb(azx_dev, SD_CTL,
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0, SD_CTL_DMA_START | SD_INT_MASK);
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azx_dev->running = true;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_start);
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/**
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* snd_hdac_stream_clear - stop a stream DMA
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* @azx_dev: HD-audio core stream to stop
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*/
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void snd_hdac_stream_clear(struct hdac_stream *azx_dev)
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{
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snd_hdac_stream_updateb(azx_dev, SD_CTL,
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SD_CTL_DMA_START | SD_INT_MASK, 0);
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snd_hdac_stream_writeb(azx_dev, SD_STS, SD_INT_MASK); /* to be sure */
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azx_dev->running = false;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_clear);
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/**
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* snd_hdac_stream_stop - stop a stream
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* @azx_dev: HD-audio core stream to stop
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*
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* Stop a stream DMA and disable stream interrupt
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*/
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void snd_hdac_stream_stop(struct hdac_stream *azx_dev)
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{
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trace_snd_hdac_stream_stop(azx_dev->bus, azx_dev);
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snd_hdac_stream_clear(azx_dev);
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/* disable SIE */
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snd_hdac_chip_updatel(azx_dev->bus, INTCTL, 1 << azx_dev->index, 0);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_stop);
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/**
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* snd_hdac_stream_reset - reset a stream
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* @azx_dev: HD-audio core stream to reset
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*/
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void snd_hdac_stream_reset(struct hdac_stream *azx_dev)
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{
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unsigned char val;
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int timeout;
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snd_hdac_stream_clear(azx_dev);
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snd_hdac_stream_updateb(azx_dev, SD_CTL, 0, SD_CTL_STREAM_RESET);
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udelay(3);
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timeout = 300;
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do {
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val = snd_hdac_stream_readb(azx_dev, SD_CTL) &
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SD_CTL_STREAM_RESET;
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if (val)
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break;
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} while (--timeout);
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val &= ~SD_CTL_STREAM_RESET;
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snd_hdac_stream_writeb(azx_dev, SD_CTL, val);
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udelay(3);
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timeout = 300;
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/* waiting for hardware to report that the stream is out of reset */
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do {
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val = snd_hdac_stream_readb(azx_dev, SD_CTL) &
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SD_CTL_STREAM_RESET;
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if (!val)
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break;
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} while (--timeout);
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/* reset first position - may not be synced with hw at this time */
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if (azx_dev->posbuf)
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*azx_dev->posbuf = 0;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_reset);
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/**
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* snd_hdac_stream_setup - set up the SD for streaming
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* @azx_dev: HD-audio core stream to set up
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*/
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int snd_hdac_stream_setup(struct hdac_stream *azx_dev)
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{
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struct hdac_bus *bus = azx_dev->bus;
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struct snd_pcm_runtime *runtime;
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unsigned int val;
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if (azx_dev->substream)
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runtime = azx_dev->substream->runtime;
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else
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runtime = NULL;
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/* make sure the run bit is zero for SD */
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snd_hdac_stream_clear(azx_dev);
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/* program the stream_tag */
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val = snd_hdac_stream_readl(azx_dev, SD_CTL);
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val = (val & ~SD_CTL_STREAM_TAG_MASK) |
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(azx_dev->stream_tag << SD_CTL_STREAM_TAG_SHIFT);
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if (!bus->snoop)
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val |= SD_CTL_TRAFFIC_PRIO;
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snd_hdac_stream_writel(azx_dev, SD_CTL, val);
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/* program the length of samples in cyclic buffer */
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snd_hdac_stream_writel(azx_dev, SD_CBL, azx_dev->bufsize);
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/* program the stream format */
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/* this value needs to be the same as the one programmed */
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snd_hdac_stream_writew(azx_dev, SD_FORMAT, azx_dev->format_val);
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/* program the stream LVI (last valid index) of the BDL */
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snd_hdac_stream_writew(azx_dev, SD_LVI, azx_dev->frags - 1);
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/* program the BDL address */
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/* lower BDL address */
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snd_hdac_stream_writel(azx_dev, SD_BDLPL, (u32)azx_dev->bdl.addr);
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/* upper BDL address */
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snd_hdac_stream_writel(azx_dev, SD_BDLPU,
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upper_32_bits(azx_dev->bdl.addr));
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/* enable the position buffer */
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if (bus->use_posbuf && bus->posbuf.addr) {
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if (!(snd_hdac_chip_readl(bus, DPLBASE) & AZX_DPLBASE_ENABLE))
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snd_hdac_chip_writel(bus, DPLBASE,
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(u32)bus->posbuf.addr | AZX_DPLBASE_ENABLE);
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}
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/* set the interrupt enable bits in the descriptor control register */
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snd_hdac_stream_updatel(azx_dev, SD_CTL, 0, SD_INT_MASK);
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if (azx_dev->direction == SNDRV_PCM_STREAM_PLAYBACK)
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azx_dev->fifo_size =
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snd_hdac_stream_readw(azx_dev, SD_FIFOSIZE) + 1;
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else
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azx_dev->fifo_size = 0;
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/* when LPIB delay correction gives a small negative value,
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* we ignore it; currently set the threshold statically to
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* 64 frames
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*/
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if (runtime && runtime->period_size > 64)
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azx_dev->delay_negative_threshold =
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-frames_to_bytes(runtime, 64);
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else
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azx_dev->delay_negative_threshold = 0;
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/* wallclk has 24Mhz clock source */
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if (runtime)
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azx_dev->period_wallclk = (((runtime->period_size * 24000) /
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runtime->rate) * 1000);
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return 0;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_setup);
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/**
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* snd_hdac_stream_cleanup - cleanup a stream
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* @azx_dev: HD-audio core stream to clean up
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*/
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void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev)
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{
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snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
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snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);
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snd_hdac_stream_writel(azx_dev, SD_CTL, 0);
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azx_dev->bufsize = 0;
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azx_dev->period_bytes = 0;
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azx_dev->format_val = 0;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_cleanup);
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/**
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* snd_hdac_stream_assign - assign a stream for the PCM
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* @bus: HD-audio core bus
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* @substream: PCM substream to assign
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*
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* Look for an unused stream for the given PCM substream, assign it
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* and return the stream object. If no stream is free, returns NULL.
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* The function tries to keep using the same stream object when it's used
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* beforehand. Also, when bus->reverse_assign flag is set, the last free
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* or matching entry is returned. This is needed for some strange codecs.
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*/
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struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
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struct snd_pcm_substream *substream)
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{
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struct hdac_stream *azx_dev;
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struct hdac_stream *res = NULL;
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/* make a non-zero unique key for the substream */
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int key = (substream->pcm->device << 16) | (substream->number << 2) |
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(substream->stream + 1);
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list_for_each_entry(azx_dev, &bus->stream_list, list) {
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if (azx_dev->direction != substream->stream)
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continue;
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if (azx_dev->opened)
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continue;
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if (azx_dev->assigned_key == key) {
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res = azx_dev;
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break;
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}
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if (!res || bus->reverse_assign)
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res = azx_dev;
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}
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if (res) {
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spin_lock_irq(&bus->reg_lock);
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res->opened = 1;
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res->running = 0;
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res->assigned_key = key;
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res->substream = substream;
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spin_unlock_irq(&bus->reg_lock);
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}
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return res;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_assign);
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/**
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* snd_hdac_stream_release - release the assigned stream
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* @azx_dev: HD-audio core stream to release
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*
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* Release the stream that has been assigned by snd_hdac_stream_assign().
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*/
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void snd_hdac_stream_release(struct hdac_stream *azx_dev)
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{
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struct hdac_bus *bus = azx_dev->bus;
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spin_lock_irq(&bus->reg_lock);
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azx_dev->opened = 0;
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azx_dev->running = 0;
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azx_dev->substream = NULL;
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spin_unlock_irq(&bus->reg_lock);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_release);
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/**
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* snd_hdac_get_stream - return hdac_stream based on stream_tag and
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* direction
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*
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* @bus: HD-audio core bus
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* @dir: direction for the stream to be found
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* @stream_tag: stream tag for stream to be found
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*/
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struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
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int dir, int stream_tag)
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{
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struct hdac_stream *s;
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list_for_each_entry(s, &bus->stream_list, list) {
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if (s->direction == dir && s->stream_tag == stream_tag)
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return s;
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}
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return NULL;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_get_stream);
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/*
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* set up a BDL entry
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*/
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static int setup_bdle(struct hdac_bus *bus,
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struct snd_dma_buffer *dmab,
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struct hdac_stream *azx_dev, __le32 **bdlp,
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int ofs, int size, int with_ioc)
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{
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__le32 *bdl = *bdlp;
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while (size > 0) {
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dma_addr_t addr;
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int chunk;
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if (azx_dev->frags >= AZX_MAX_BDL_ENTRIES)
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return -EINVAL;
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addr = snd_sgbuf_get_addr(dmab, ofs);
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/* program the address field of the BDL entry */
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bdl[0] = cpu_to_le32((u32)addr);
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bdl[1] = cpu_to_le32(upper_32_bits(addr));
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/* program the size field of the BDL entry */
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chunk = snd_sgbuf_get_chunk_size(dmab, ofs, size);
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/* one BDLE cannot cross 4K boundary on CTHDA chips */
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if (bus->align_bdle_4k) {
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u32 remain = 0x1000 - (ofs & 0xfff);
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if (chunk > remain)
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chunk = remain;
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}
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bdl[2] = cpu_to_le32(chunk);
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/* program the IOC to enable interrupt
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* only when the whole fragment is processed
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*/
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size -= chunk;
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bdl[3] = (size || !with_ioc) ? 0 : cpu_to_le32(0x01);
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bdl += 4;
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azx_dev->frags++;
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ofs += chunk;
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}
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*bdlp = bdl;
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return ofs;
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}
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/**
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* snd_hdac_stream_setup_periods - set up BDL entries
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* @azx_dev: HD-audio core stream to set up
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*
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* Set up the buffer descriptor table of the given stream based on the
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* period and buffer sizes of the assigned PCM substream.
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*/
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int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
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{
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struct hdac_bus *bus = azx_dev->bus;
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struct snd_pcm_substream *substream = azx_dev->substream;
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struct snd_pcm_runtime *runtime = substream->runtime;
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__le32 *bdl;
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int i, ofs, periods, period_bytes;
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int pos_adj, pos_align;
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/* reset BDL address */
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snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
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snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);
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period_bytes = azx_dev->period_bytes;
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periods = azx_dev->bufsize / period_bytes;
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/* program the initial BDL entries */
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bdl = (__le32 *)azx_dev->bdl.area;
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ofs = 0;
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azx_dev->frags = 0;
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pos_adj = bus->bdl_pos_adj;
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if (!azx_dev->no_period_wakeup && pos_adj > 0) {
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pos_align = pos_adj;
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pos_adj = (pos_adj * runtime->rate + 47999) / 48000;
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if (!pos_adj)
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pos_adj = pos_align;
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else
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pos_adj = ((pos_adj + pos_align - 1) / pos_align) *
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pos_align;
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pos_adj = frames_to_bytes(runtime, pos_adj);
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if (pos_adj >= period_bytes) {
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dev_warn(bus->dev, "Too big adjustment %d\n",
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pos_adj);
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pos_adj = 0;
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} else {
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ofs = setup_bdle(bus, snd_pcm_get_dma_buf(substream),
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azx_dev,
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&bdl, ofs, pos_adj, true);
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if (ofs < 0)
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goto error;
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}
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} else
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pos_adj = 0;
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for (i = 0; i < periods; i++) {
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if (i == periods - 1 && pos_adj)
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ofs = setup_bdle(bus, snd_pcm_get_dma_buf(substream),
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azx_dev, &bdl, ofs,
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period_bytes - pos_adj, 0);
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else
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ofs = setup_bdle(bus, snd_pcm_get_dma_buf(substream),
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azx_dev, &bdl, ofs,
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period_bytes,
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!azx_dev->no_period_wakeup);
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if (ofs < 0)
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goto error;
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}
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return 0;
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error:
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dev_err(bus->dev, "Too many BDL entries: buffer=%d, period=%d\n",
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azx_dev->bufsize, period_bytes);
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return -EINVAL;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_setup_periods);
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/**
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* snd_hdac_stream_set_params - set stream parameters
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* @azx_dev: HD-audio core stream for which parameters are to be set
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* @format_val: format value parameter
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*
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* Setup the HD-audio core stream parameters from substream of the stream
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* and passed format value
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*/
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int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
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unsigned int format_val)
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{
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unsigned int bufsize, period_bytes;
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struct snd_pcm_substream *substream = azx_dev->substream;
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struct snd_pcm_runtime *runtime;
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int err;
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if (!substream)
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return -EINVAL;
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runtime = substream->runtime;
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bufsize = snd_pcm_lib_buffer_bytes(substream);
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period_bytes = snd_pcm_lib_period_bytes(substream);
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if (bufsize != azx_dev->bufsize ||
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period_bytes != azx_dev->period_bytes ||
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format_val != azx_dev->format_val ||
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runtime->no_period_wakeup != azx_dev->no_period_wakeup) {
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azx_dev->bufsize = bufsize;
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azx_dev->period_bytes = period_bytes;
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azx_dev->format_val = format_val;
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azx_dev->no_period_wakeup = runtime->no_period_wakeup;
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err = snd_hdac_stream_setup_periods(azx_dev);
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if (err < 0)
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return err;
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}
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return 0;
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}
|
|
EXPORT_SYMBOL_GPL(snd_hdac_stream_set_params);
|
|
|
|
static u64 azx_cc_read(const struct cyclecounter *cc)
|
|
{
|
|
struct hdac_stream *azx_dev = container_of(cc, struct hdac_stream, cc);
|
|
|
|
return snd_hdac_chip_readl(azx_dev->bus, WALLCLK);
|
|
}
|
|
|
|
static void azx_timecounter_init(struct hdac_stream *azx_dev,
|
|
bool force, u64 last)
|
|
{
|
|
struct timecounter *tc = &azx_dev->tc;
|
|
struct cyclecounter *cc = &azx_dev->cc;
|
|
u64 nsec;
|
|
|
|
cc->read = azx_cc_read;
|
|
cc->mask = CLOCKSOURCE_MASK(32);
|
|
|
|
/*
|
|
* Converting from 24 MHz to ns means applying a 125/3 factor.
|
|
* To avoid any saturation issues in intermediate operations,
|
|
* the 125 factor is applied first. The division is applied
|
|
* last after reading the timecounter value.
|
|
* Applying the 1/3 factor as part of the multiplication
|
|
* requires at least 20 bits for a decent precision, however
|
|
* overflows occur after about 4 hours or less, not a option.
|
|
*/
|
|
|
|
cc->mult = 125; /* saturation after 195 years */
|
|
cc->shift = 0;
|
|
|
|
nsec = 0; /* audio time is elapsed time since trigger */
|
|
timecounter_init(tc, cc, nsec);
|
|
if (force) {
|
|
/*
|
|
* force timecounter to use predefined value,
|
|
* used for synchronized starts
|
|
*/
|
|
tc->cycle_last = last;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* snd_hdac_stream_timecounter_init - initialize time counter
|
|
* @azx_dev: HD-audio core stream (master stream)
|
|
* @streams: bit flags of streams to set up
|
|
*
|
|
* Initializes the time counter of streams marked by the bit flags (each
|
|
* bit corresponds to the stream index).
|
|
* The trigger timestamp of PCM substream assigned to the given stream is
|
|
* updated accordingly, too.
|
|
*/
|
|
void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
|
|
unsigned int streams)
|
|
{
|
|
struct hdac_bus *bus = azx_dev->bus;
|
|
struct snd_pcm_runtime *runtime = azx_dev->substream->runtime;
|
|
struct hdac_stream *s;
|
|
bool inited = false;
|
|
u64 cycle_last = 0;
|
|
int i = 0;
|
|
|
|
list_for_each_entry(s, &bus->stream_list, list) {
|
|
if (streams & (1 << i)) {
|
|
azx_timecounter_init(s, inited, cycle_last);
|
|
if (!inited) {
|
|
inited = true;
|
|
cycle_last = s->tc.cycle_last;
|
|
}
|
|
}
|
|
i++;
|
|
}
|
|
|
|
snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
|
|
runtime->trigger_tstamp_latched = true;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hdac_stream_timecounter_init);
|
|
|
|
/**
|
|
* snd_hdac_stream_sync_trigger - turn on/off stream sync register
|
|
* @azx_dev: HD-audio core stream (master stream)
|
|
* @streams: bit flags of streams to sync
|
|
*/
|
|
void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
|
|
unsigned int streams, unsigned int reg)
|
|
{
|
|
struct hdac_bus *bus = azx_dev->bus;
|
|
unsigned int val;
|
|
|
|
if (!reg)
|
|
reg = AZX_REG_SSYNC;
|
|
val = _snd_hdac_chip_read(l, bus, reg);
|
|
if (set)
|
|
val |= streams;
|
|
else
|
|
val &= ~streams;
|
|
_snd_hdac_chip_write(l, bus, reg, val);
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hdac_stream_sync_trigger);
|
|
|
|
/**
|
|
* snd_hdac_stream_sync - sync with start/strop trigger operation
|
|
* @azx_dev: HD-audio core stream (master stream)
|
|
* @start: true = start, false = stop
|
|
* @streams: bit flags of streams to sync
|
|
*
|
|
* For @start = true, wait until all FIFOs get ready.
|
|
* For @start = false, wait until all RUN bits are cleared.
|
|
*/
|
|
void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
|
|
unsigned int streams)
|
|
{
|
|
struct hdac_bus *bus = azx_dev->bus;
|
|
int i, nwait, timeout;
|
|
struct hdac_stream *s;
|
|
|
|
for (timeout = 5000; timeout; timeout--) {
|
|
nwait = 0;
|
|
i = 0;
|
|
list_for_each_entry(s, &bus->stream_list, list) {
|
|
if (streams & (1 << i)) {
|
|
if (start) {
|
|
/* check FIFO gets ready */
|
|
if (!(snd_hdac_stream_readb(s, SD_STS) &
|
|
SD_STS_FIFO_READY))
|
|
nwait++;
|
|
} else {
|
|
/* check RUN bit is cleared */
|
|
if (snd_hdac_stream_readb(s, SD_CTL) &
|
|
SD_CTL_DMA_START)
|
|
nwait++;
|
|
}
|
|
}
|
|
i++;
|
|
}
|
|
if (!nwait)
|
|
break;
|
|
cpu_relax();
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hdac_stream_sync);
|
|
|
|
#ifdef CONFIG_SND_HDA_DSP_LOADER
|
|
/**
|
|
* snd_hdac_dsp_prepare - prepare for DSP loading
|
|
* @azx_dev: HD-audio core stream used for DSP loading
|
|
* @format: HD-audio stream format
|
|
* @byte_size: data chunk byte size
|
|
* @bufp: allocated buffer
|
|
*
|
|
* Allocate the buffer for the given size and set up the given stream for
|
|
* DSP loading. Returns the stream tag (>= 0), or a negative error code.
|
|
*/
|
|
int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
|
|
unsigned int byte_size, struct snd_dma_buffer *bufp)
|
|
{
|
|
struct hdac_bus *bus = azx_dev->bus;
|
|
u32 *bdl;
|
|
int err;
|
|
|
|
snd_hdac_dsp_lock(azx_dev);
|
|
spin_lock_irq(&bus->reg_lock);
|
|
if (azx_dev->running || azx_dev->locked) {
|
|
spin_unlock_irq(&bus->reg_lock);
|
|
err = -EBUSY;
|
|
goto unlock;
|
|
}
|
|
azx_dev->locked = true;
|
|
spin_unlock_irq(&bus->reg_lock);
|
|
|
|
err = bus->io_ops->dma_alloc_pages(bus, SNDRV_DMA_TYPE_DEV_SG,
|
|
byte_size, bufp);
|
|
if (err < 0)
|
|
goto err_alloc;
|
|
|
|
azx_dev->substream = NULL;
|
|
azx_dev->bufsize = byte_size;
|
|
azx_dev->period_bytes = byte_size;
|
|
azx_dev->format_val = format;
|
|
|
|
snd_hdac_stream_reset(azx_dev);
|
|
|
|
/* reset BDL address */
|
|
snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
|
|
snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);
|
|
|
|
azx_dev->frags = 0;
|
|
bdl = (u32 *)azx_dev->bdl.area;
|
|
err = setup_bdle(bus, bufp, azx_dev, &bdl, 0, byte_size, 0);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
snd_hdac_stream_setup(azx_dev);
|
|
snd_hdac_dsp_unlock(azx_dev);
|
|
return azx_dev->stream_tag;
|
|
|
|
error:
|
|
bus->io_ops->dma_free_pages(bus, bufp);
|
|
err_alloc:
|
|
spin_lock_irq(&bus->reg_lock);
|
|
azx_dev->locked = false;
|
|
spin_unlock_irq(&bus->reg_lock);
|
|
unlock:
|
|
snd_hdac_dsp_unlock(azx_dev);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hdac_dsp_prepare);
|
|
|
|
/**
|
|
* snd_hdac_dsp_trigger - start / stop DSP loading
|
|
* @azx_dev: HD-audio core stream used for DSP loading
|
|
* @start: trigger start or stop
|
|
*/
|
|
void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
|
|
{
|
|
if (start)
|
|
snd_hdac_stream_start(azx_dev, true);
|
|
else
|
|
snd_hdac_stream_stop(azx_dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hdac_dsp_trigger);
|
|
|
|
/**
|
|
* snd_hdac_dsp_cleanup - clean up the stream from DSP loading to normal
|
|
* @azx_dev: HD-audio core stream used for DSP loading
|
|
* @dmab: buffer used by DSP loading
|
|
*/
|
|
void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
|
|
struct snd_dma_buffer *dmab)
|
|
{
|
|
struct hdac_bus *bus = azx_dev->bus;
|
|
|
|
if (!dmab->area || !azx_dev->locked)
|
|
return;
|
|
|
|
snd_hdac_dsp_lock(azx_dev);
|
|
/* reset BDL address */
|
|
snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
|
|
snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);
|
|
snd_hdac_stream_writel(azx_dev, SD_CTL, 0);
|
|
azx_dev->bufsize = 0;
|
|
azx_dev->period_bytes = 0;
|
|
azx_dev->format_val = 0;
|
|
|
|
bus->io_ops->dma_free_pages(bus, dmab);
|
|
dmab->area = NULL;
|
|
|
|
spin_lock_irq(&bus->reg_lock);
|
|
azx_dev->locked = false;
|
|
spin_unlock_irq(&bus->reg_lock);
|
|
snd_hdac_dsp_unlock(azx_dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hdac_dsp_cleanup);
|
|
#endif /* CONFIG_SND_HDA_DSP_LOADER */
|