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linuxdebug/sound/soc/sof/intel/hda-stream.c

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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation. All rights reserved.
//
// Authors: Liam Girdwood <liam.r.girdwood@linux.intel.com>
// Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
// Rander Wang <rander.wang@intel.com>
// Keyon Jie <yang.jie@linux.intel.com>
//
/*
* Hardware interface for generic Intel audio DSP HDA IP
*/
#include <linux/pm_runtime.h>
#include <sound/hdaudio_ext.h>
#include <sound/hda_register.h>
#include <sound/sof.h>
#include <trace/events/sof_intel.h>
#include "../ops.h"
#include "../sof-audio.h"
#include "hda.h"
#define HDA_LTRP_GB_VALUE_US 95
static inline const char *hda_hstream_direction_str(struct hdac_stream *hstream)
{
if (hstream->direction == SNDRV_PCM_STREAM_PLAYBACK)
return "Playback";
else
return "Capture";
}
static char *hda_hstream_dbg_get_stream_info_str(struct hdac_stream *hstream)
{
struct snd_soc_pcm_runtime *rtd;
if (hstream->substream)
rtd = asoc_substream_to_rtd(hstream->substream);
else if (hstream->cstream)
rtd = hstream->cstream->private_data;
else
/* Non audio DMA user, like dma-trace */
return kasprintf(GFP_KERNEL, "-- (%s, stream_tag: %u)",
hda_hstream_direction_str(hstream),
hstream->stream_tag);
return kasprintf(GFP_KERNEL, "dai_link \"%s\" (%s, stream_tag: %u)",
rtd->dai_link->name, hda_hstream_direction_str(hstream),
hstream->stream_tag);
}
/*
* set up one of BDL entries for a stream
*/
static int hda_setup_bdle(struct snd_sof_dev *sdev,
struct snd_dma_buffer *dmab,
struct hdac_stream *hstream,
struct sof_intel_dsp_bdl **bdlp,
int offset, int size, int ioc)
{
struct hdac_bus *bus = sof_to_bus(sdev);
struct sof_intel_dsp_bdl *bdl = *bdlp;
while (size > 0) {
dma_addr_t addr;
int chunk;
if (hstream->frags >= HDA_DSP_MAX_BDL_ENTRIES) {
dev_err(sdev->dev, "error: stream frags exceeded\n");
return -EINVAL;
}
addr = snd_sgbuf_get_addr(dmab, offset);
/* program BDL addr */
bdl->addr_l = cpu_to_le32(lower_32_bits(addr));
bdl->addr_h = cpu_to_le32(upper_32_bits(addr));
/* program BDL size */
chunk = snd_sgbuf_get_chunk_size(dmab, offset, size);
/* one BDLE should not cross 4K boundary */
if (bus->align_bdle_4k) {
u32 remain = 0x1000 - (offset & 0xfff);
if (chunk > remain)
chunk = remain;
}
bdl->size = cpu_to_le32(chunk);
/* only program IOC when the whole segment is processed */
size -= chunk;
bdl->ioc = (size || !ioc) ? 0 : cpu_to_le32(0x01);
bdl++;
hstream->frags++;
offset += chunk;
}
*bdlp = bdl;
return offset;
}
/*
* set up Buffer Descriptor List (BDL) for host memory transfer
* BDL describes the location of the individual buffers and is little endian.
*/
int hda_dsp_stream_setup_bdl(struct snd_sof_dev *sdev,
struct snd_dma_buffer *dmab,
struct hdac_stream *hstream)
{
struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
struct sof_intel_dsp_bdl *bdl;
int i, offset, period_bytes, periods;
int remain, ioc;
period_bytes = hstream->period_bytes;
dev_dbg(sdev->dev, "period_bytes:0x%x\n", period_bytes);
if (!period_bytes)
period_bytes = hstream->bufsize;
periods = hstream->bufsize / period_bytes;
dev_dbg(sdev->dev, "periods:%d\n", periods);
remain = hstream->bufsize % period_bytes;
if (remain)
periods++;
/* program the initial BDL entries */
bdl = (struct sof_intel_dsp_bdl *)hstream->bdl.area;
offset = 0;
hstream->frags = 0;
/*
* set IOC if don't use position IPC
* and period_wakeup needed.
*/
ioc = hda->no_ipc_position ?
!hstream->no_period_wakeup : 0;
for (i = 0; i < periods; i++) {
if (i == (periods - 1) && remain)
/* set the last small entry */
offset = hda_setup_bdle(sdev, dmab,
hstream, &bdl, offset,
remain, 0);
else
offset = hda_setup_bdle(sdev, dmab,
hstream, &bdl, offset,
period_bytes, ioc);
}
return offset;
}
int hda_dsp_stream_spib_config(struct snd_sof_dev *sdev,
struct hdac_ext_stream *hext_stream,
int enable, u32 size)
{
struct hdac_stream *hstream = &hext_stream->hstream;
u32 mask;
if (!sdev->bar[HDA_DSP_SPIB_BAR]) {
dev_err(sdev->dev, "error: address of spib capability is NULL\n");
return -EINVAL;
}
mask = (1 << hstream->index);
/* enable/disable SPIB for the stream */
snd_sof_dsp_update_bits(sdev, HDA_DSP_SPIB_BAR,
SOF_HDA_ADSP_REG_CL_SPBFIFO_SPBFCCTL, mask,
enable << hstream->index);
/* set the SPIB value */
sof_io_write(sdev, hext_stream->spib_addr, size);
return 0;
}
/* get next unused stream */
struct hdac_ext_stream *
hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags)
{
struct hdac_bus *bus = sof_to_bus(sdev);
struct sof_intel_hda_stream *hda_stream;
struct hdac_ext_stream *hext_stream = NULL;
struct hdac_stream *s;
spin_lock_irq(&bus->reg_lock);
/* get an unused stream */
list_for_each_entry(s, &bus->stream_list, list) {
if (s->direction == direction && !s->opened) {
hext_stream = stream_to_hdac_ext_stream(s);
hda_stream = container_of(hext_stream,
struct sof_intel_hda_stream,
hext_stream);
/* check if the host DMA channel is reserved */
if (hda_stream->host_reserved)
continue;
s->opened = true;
break;
}
}
spin_unlock_irq(&bus->reg_lock);
/* stream found ? */
if (!hext_stream) {
dev_err(sdev->dev, "error: no free %s streams\n",
direction == SNDRV_PCM_STREAM_PLAYBACK ?
"playback" : "capture");
return hext_stream;
}
hda_stream->flags = flags;
/*
* Prevent DMI Link L1 entry for streams that don't support it.
* Workaround to address a known issue with host DMA that results
* in xruns during pause/release in capture scenarios.
*/
if (!(flags & SOF_HDA_STREAM_DMI_L1_COMPATIBLE))
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
HDA_VS_INTEL_EM2,
HDA_VS_INTEL_EM2_L1SEN, 0);
return hext_stream;
}
/* free a stream */
int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag)
{
struct hdac_bus *bus = sof_to_bus(sdev);
struct sof_intel_hda_stream *hda_stream;
struct hdac_ext_stream *hext_stream;
struct hdac_stream *s;
bool dmi_l1_enable = true;
bool found = false;
spin_lock_irq(&bus->reg_lock);
/*
* close stream matching the stream tag and check if there are any open streams
* that are DMI L1 incompatible.
*/
list_for_each_entry(s, &bus->stream_list, list) {
hext_stream = stream_to_hdac_ext_stream(s);
hda_stream = container_of(hext_stream, struct sof_intel_hda_stream, hext_stream);
if (!s->opened)
continue;
if (s->direction == direction && s->stream_tag == stream_tag) {
s->opened = false;
found = true;
} else if (!(hda_stream->flags & SOF_HDA_STREAM_DMI_L1_COMPATIBLE)) {
dmi_l1_enable = false;
}
}
spin_unlock_irq(&bus->reg_lock);
/* Enable DMI L1 if permitted */
if (dmi_l1_enable)
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, HDA_VS_INTEL_EM2,
HDA_VS_INTEL_EM2_L1SEN, HDA_VS_INTEL_EM2_L1SEN);
if (!found) {
dev_err(sdev->dev, "%s: stream_tag %d not opened!\n",
__func__, stream_tag);
return -ENODEV;
}
return 0;
}
static int hda_dsp_stream_reset(struct snd_sof_dev *sdev, struct hdac_stream *hstream)
{
int sd_offset = SOF_STREAM_SD_OFFSET(hstream);
int timeout = HDA_DSP_STREAM_RESET_TIMEOUT;
u32 val;
/* enter stream reset */
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, sd_offset, SOF_STREAM_SD_OFFSET_CRST,
SOF_STREAM_SD_OFFSET_CRST);
do {
val = snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR, sd_offset);
if (val & SOF_STREAM_SD_OFFSET_CRST)
break;
} while (--timeout);
if (timeout == 0) {
dev_err(sdev->dev, "timeout waiting for stream reset\n");
return -ETIMEDOUT;
}
timeout = HDA_DSP_STREAM_RESET_TIMEOUT;
/* exit stream reset and wait to read a zero before reading any other register */
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, sd_offset, SOF_STREAM_SD_OFFSET_CRST, 0x0);
/* wait for hardware to report that stream is out of reset */
udelay(3);
do {
val = snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR, sd_offset);
if ((val & SOF_STREAM_SD_OFFSET_CRST) == 0)
break;
} while (--timeout);
if (timeout == 0) {
dev_err(sdev->dev, "timeout waiting for stream to exit reset\n");
return -ETIMEDOUT;
}
return 0;
}
int hda_dsp_stream_trigger(struct snd_sof_dev *sdev,
struct hdac_ext_stream *hext_stream, int cmd)
{
struct hdac_stream *hstream = &hext_stream->hstream;
int sd_offset = SOF_STREAM_SD_OFFSET(hstream);
u32 dma_start = SOF_HDA_SD_CTL_DMA_START;
int ret = 0;
u32 run;
/* cmd must be for audio stream */
switch (cmd) {
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_START:
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, SOF_HDA_INTCTL,
1 << hstream->index,
1 << hstream->index);
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
sd_offset,
SOF_HDA_SD_CTL_DMA_START |
SOF_HDA_CL_DMA_SD_INT_MASK,
SOF_HDA_SD_CTL_DMA_START |
SOF_HDA_CL_DMA_SD_INT_MASK);
ret = snd_sof_dsp_read_poll_timeout(sdev,
HDA_DSP_HDA_BAR,
sd_offset, run,
((run & dma_start) == dma_start),
HDA_DSP_REG_POLL_INTERVAL_US,
HDA_DSP_STREAM_RUN_TIMEOUT);
if (ret >= 0)
hstream->running = true;
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_STOP:
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
sd_offset,
SOF_HDA_SD_CTL_DMA_START |
SOF_HDA_CL_DMA_SD_INT_MASK, 0x0);
ret = snd_sof_dsp_read_poll_timeout(sdev, HDA_DSP_HDA_BAR,
sd_offset, run,
!(run & dma_start),
HDA_DSP_REG_POLL_INTERVAL_US,
HDA_DSP_STREAM_RUN_TIMEOUT);
if (ret >= 0) {
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_STS,
SOF_HDA_CL_DMA_SD_INT_MASK);
hstream->running = false;
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
SOF_HDA_INTCTL,
1 << hstream->index, 0x0);
}
break;
default:
dev_err(sdev->dev, "error: unknown command: %d\n", cmd);
return -EINVAL;
}
if (ret < 0) {
char *stream_name = hda_hstream_dbg_get_stream_info_str(hstream);
dev_err(sdev->dev,
"%s: cmd %d on %s: timeout on STREAM_SD_OFFSET read\n",
__func__, cmd, stream_name ? stream_name : "unknown stream");
kfree(stream_name);
}
return ret;
}
/* minimal recommended programming for ICCMAX stream */
int hda_dsp_iccmax_stream_hw_params(struct snd_sof_dev *sdev, struct hdac_ext_stream *hext_stream,
struct snd_dma_buffer *dmab,
struct snd_pcm_hw_params *params)
{
struct hdac_bus *bus = sof_to_bus(sdev);
struct hdac_stream *hstream = &hext_stream->hstream;
int sd_offset = SOF_STREAM_SD_OFFSET(hstream);
int ret;
u32 mask = 0x1 << hstream->index;
if (!hext_stream) {
dev_err(sdev->dev, "error: no stream available\n");
return -ENODEV;
}
if (!dmab) {
dev_err(sdev->dev, "error: no dma buffer allocated!\n");
return -ENODEV;
}
if (hstream->posbuf)
*hstream->posbuf = 0;
/* reset BDL address */
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_BDLPL,
0x0);
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_BDLPU,
0x0);
hstream->frags = 0;
ret = hda_dsp_stream_setup_bdl(sdev, dmab, hstream);
if (ret < 0) {
dev_err(sdev->dev, "error: set up of BDL failed\n");
return ret;
}
/* program BDL address */
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_BDLPL,
(u32)hstream->bdl.addr);
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_BDLPU,
upper_32_bits(hstream->bdl.addr));
/* program cyclic buffer length */
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_CBL,
hstream->bufsize);
/* program last valid index */
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_LVI,
0xffff, (hstream->frags - 1));
/* decouple host and link DMA, enable DSP features */
snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR, SOF_HDA_REG_PP_PPCTL,
mask, mask);
/* Follow HW recommendation to set the guardband value to 95us during FW boot */
snd_hdac_chip_updateb(bus, VS_LTRP, HDA_VS_INTEL_LTRP_GB_MASK, HDA_LTRP_GB_VALUE_US);
/* start DMA */
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, sd_offset,
SOF_HDA_SD_CTL_DMA_START, SOF_HDA_SD_CTL_DMA_START);
return 0;
}
/*
* prepare for common hdac registers settings, for both code loader
* and normal stream.
*/
int hda_dsp_stream_hw_params(struct snd_sof_dev *sdev,
struct hdac_ext_stream *hext_stream,
struct snd_dma_buffer *dmab,
struct snd_pcm_hw_params *params)
{
const struct sof_intel_dsp_desc *chip = get_chip_info(sdev->pdata);
struct hdac_bus *bus = sof_to_bus(sdev);
struct hdac_stream *hstream = &hext_stream->hstream;
int sd_offset = SOF_STREAM_SD_OFFSET(hstream);
int ret;
u32 dma_start = SOF_HDA_SD_CTL_DMA_START;
u32 mask;
u32 run;
if (!hext_stream) {
dev_err(sdev->dev, "error: no stream available\n");
return -ENODEV;
}
if (!dmab) {
dev_err(sdev->dev, "error: no dma buffer allocated!\n");
return -ENODEV;
}
/* decouple host and link DMA */
mask = 0x1 << hstream->index;
snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR, SOF_HDA_REG_PP_PPCTL,
mask, mask);
/* clear stream status */
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, sd_offset,
SOF_HDA_CL_DMA_SD_INT_MASK |
SOF_HDA_SD_CTL_DMA_START, 0);
ret = snd_sof_dsp_read_poll_timeout(sdev, HDA_DSP_HDA_BAR,
sd_offset, run,
!(run & dma_start),
HDA_DSP_REG_POLL_INTERVAL_US,
HDA_DSP_STREAM_RUN_TIMEOUT);
if (ret < 0) {
char *stream_name = hda_hstream_dbg_get_stream_info_str(hstream);
dev_err(sdev->dev,
"%s: on %s: timeout on STREAM_SD_OFFSET read1\n",
__func__, stream_name ? stream_name : "unknown stream");
kfree(stream_name);
return ret;
}
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_STS,
SOF_HDA_CL_DMA_SD_INT_MASK,
SOF_HDA_CL_DMA_SD_INT_MASK);
/* stream reset */
ret = hda_dsp_stream_reset(sdev, hstream);
if (ret < 0)
return ret;
if (hstream->posbuf)
*hstream->posbuf = 0;
/* reset BDL address */
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_BDLPL,
0x0);
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_BDLPU,
0x0);
/* clear stream status */
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, sd_offset,
SOF_HDA_CL_DMA_SD_INT_MASK |
SOF_HDA_SD_CTL_DMA_START, 0);
ret = snd_sof_dsp_read_poll_timeout(sdev, HDA_DSP_HDA_BAR,
sd_offset, run,
!(run & dma_start),
HDA_DSP_REG_POLL_INTERVAL_US,
HDA_DSP_STREAM_RUN_TIMEOUT);
if (ret < 0) {
char *stream_name = hda_hstream_dbg_get_stream_info_str(hstream);
dev_err(sdev->dev,
"%s: on %s: timeout on STREAM_SD_OFFSET read1\n",
__func__, stream_name ? stream_name : "unknown stream");
kfree(stream_name);
return ret;
}
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_STS,
SOF_HDA_CL_DMA_SD_INT_MASK,
SOF_HDA_CL_DMA_SD_INT_MASK);
hstream->frags = 0;
ret = hda_dsp_stream_setup_bdl(sdev, dmab, hstream);
if (ret < 0) {
dev_err(sdev->dev, "error: set up of BDL failed\n");
return ret;
}
/* program stream tag to set up stream descriptor for DMA */
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, sd_offset,
SOF_HDA_CL_SD_CTL_STREAM_TAG_MASK,
hstream->stream_tag <<
SOF_HDA_CL_SD_CTL_STREAM_TAG_SHIFT);
/* program cyclic buffer length */
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_CBL,
hstream->bufsize);
/*
* Recommended hardware programming sequence for HDAudio DMA format
* on earlier platforms - this is not needed on newer platforms
*
* 1. Put DMA into coupled mode by clearing PPCTL.PROCEN bit
* for corresponding stream index before the time of writing
* format to SDxFMT register.
* 2. Write SDxFMT
* 3. Set PPCTL.PROCEN bit for corresponding stream index to
* enable decoupled mode
*/
if (chip->quirks & SOF_INTEL_PROCEN_FMT_QUIRK) {
/* couple host and link DMA, disable DSP features */
snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR, SOF_HDA_REG_PP_PPCTL,
mask, 0);
}
/* program stream format */
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
sd_offset +
SOF_HDA_ADSP_REG_CL_SD_FORMAT,
0xffff, hstream->format_val);
if (chip->quirks & SOF_INTEL_PROCEN_FMT_QUIRK) {
/* decouple host and link DMA, enable DSP features */
snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR, SOF_HDA_REG_PP_PPCTL,
mask, mask);
}
/* program last valid index */
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_LVI,
0xffff, (hstream->frags - 1));
/* program BDL address */
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_BDLPL,
(u32)hstream->bdl.addr);
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
sd_offset + SOF_HDA_ADSP_REG_CL_SD_BDLPU,
upper_32_bits(hstream->bdl.addr));
/* enable position buffer, if needed */
if (bus->use_posbuf && bus->posbuf.addr &&
!(snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR, SOF_HDA_ADSP_DPLBASE)
& SOF_HDA_ADSP_DPLBASE_ENABLE)) {
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR, SOF_HDA_ADSP_DPUBASE,
upper_32_bits(bus->posbuf.addr));
snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR, SOF_HDA_ADSP_DPLBASE,
(u32)bus->posbuf.addr |
SOF_HDA_ADSP_DPLBASE_ENABLE);
}
/* set interrupt enable bits */
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, sd_offset,
SOF_HDA_CL_DMA_SD_INT_MASK,
SOF_HDA_CL_DMA_SD_INT_MASK);
/* read FIFO size */
if (hstream->direction == SNDRV_PCM_STREAM_PLAYBACK) {
hstream->fifo_size =
snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR,
sd_offset +
SOF_HDA_ADSP_REG_CL_SD_FIFOSIZE);
hstream->fifo_size &= 0xffff;
hstream->fifo_size += 1;
} else {
hstream->fifo_size = 0;
}
return ret;
}
int hda_dsp_stream_hw_free(struct snd_sof_dev *sdev,
struct snd_pcm_substream *substream)
{
struct hdac_stream *hstream = substream->runtime->private_data;
struct hdac_ext_stream *hext_stream = container_of(hstream,
struct hdac_ext_stream,
hstream);
struct hdac_bus *bus = sof_to_bus(sdev);
u32 mask = 0x1 << hstream->index;
int ret;
ret = hda_dsp_stream_reset(sdev, hstream);
if (ret < 0)
return ret;
spin_lock_irq(&bus->reg_lock);
/* couple host and link DMA if link DMA channel is idle */
if (!hext_stream->link_locked)
snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR,
SOF_HDA_REG_PP_PPCTL, mask, 0);
spin_unlock_irq(&bus->reg_lock);
hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_DISABLE, 0);
hstream->substream = NULL;
return 0;
}
bool hda_dsp_check_stream_irq(struct snd_sof_dev *sdev)
{
struct hdac_bus *bus = sof_to_bus(sdev);
bool ret = false;
u32 status;
/* The function can be called at irq thread, so use spin_lock_irq */
spin_lock_irq(&bus->reg_lock);
status = snd_hdac_chip_readl(bus, INTSTS);
trace_sof_intel_hda_dsp_check_stream_irq(sdev, status);
/* if Register inaccessible, ignore it.*/
if (status != 0xffffffff)
ret = true;
spin_unlock_irq(&bus->reg_lock);
return ret;
}
static void
hda_dsp_compr_bytes_transferred(struct hdac_stream *hstream, int direction)
{
u64 buffer_size = hstream->bufsize;
u64 prev_pos, pos, num_bytes;
div64_u64_rem(hstream->curr_pos, buffer_size, &prev_pos);
pos = hda_dsp_stream_get_position(hstream, direction, false);
if (pos < prev_pos)
num_bytes = (buffer_size - prev_pos) + pos;
else
num_bytes = pos - prev_pos;
hstream->curr_pos += num_bytes;
}
static bool hda_dsp_stream_check(struct hdac_bus *bus, u32 status)
{
struct sof_intel_hda_dev *sof_hda = bus_to_sof_hda(bus);
struct hdac_stream *s;
bool active = false;
u32 sd_status;
list_for_each_entry(s, &bus->stream_list, list) {
if (status & BIT(s->index) && s->opened) {
sd_status = snd_hdac_stream_readb(s, SD_STS);
trace_sof_intel_hda_dsp_stream_status(bus->dev, s, sd_status);
snd_hdac_stream_writeb(s, SD_STS, sd_status);
active = true;
if ((!s->substream && !s->cstream) ||
!s->running ||
(sd_status & SOF_HDA_CL_DMA_SD_INT_COMPLETE) == 0)
continue;
/* Inform ALSA only in case not do that with IPC */
if (s->substream && sof_hda->no_ipc_position) {
snd_sof_pcm_period_elapsed(s->substream);
} else if (s->cstream) {
hda_dsp_compr_bytes_transferred(s, s->cstream->direction);
snd_compr_fragment_elapsed(s->cstream);
}
}
}
return active;
}
irqreturn_t hda_dsp_stream_threaded_handler(int irq, void *context)
{
struct snd_sof_dev *sdev = context;
struct hdac_bus *bus = sof_to_bus(sdev);
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
u32 rirb_status;
#endif
bool active;
u32 status;
int i;
/*
* Loop 10 times to handle missed interrupts caused by
* unsolicited responses from the codec
*/
for (i = 0, active = true; i < 10 && active; i++) {
spin_lock_irq(&bus->reg_lock);
status = snd_hdac_chip_readl(bus, INTSTS);
/* check streams */
active = hda_dsp_stream_check(bus, status);
/* check and clear RIRB interrupt */
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
if (status & AZX_INT_CTRL_EN) {
rirb_status = snd_hdac_chip_readb(bus, RIRBSTS);
if (rirb_status & RIRB_INT_MASK) {
/*
* Clearing the interrupt status here ensures
* that no interrupt gets masked after the RIRB
* wp is read in snd_hdac_bus_update_rirb.
*/
snd_hdac_chip_writeb(bus, RIRBSTS,
RIRB_INT_MASK);
active = true;
if (rirb_status & RIRB_INT_RESPONSE)
snd_hdac_bus_update_rirb(bus);
}
}
#endif
spin_unlock_irq(&bus->reg_lock);
}
return IRQ_HANDLED;
}
int hda_dsp_stream_init(struct snd_sof_dev *sdev)
{
struct hdac_bus *bus = sof_to_bus(sdev);
struct hdac_ext_stream *hext_stream;
struct hdac_stream *hstream;
struct pci_dev *pci = to_pci_dev(sdev->dev);
struct sof_intel_hda_dev *sof_hda = bus_to_sof_hda(bus);
int sd_offset;
int i, num_playback, num_capture, num_total, ret;
u32 gcap;
gcap = snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR, SOF_HDA_GCAP);
dev_dbg(sdev->dev, "hda global caps = 0x%x\n", gcap);
/* get stream count from GCAP */
num_capture = (gcap >> 8) & 0x0f;
num_playback = (gcap >> 12) & 0x0f;
num_total = num_playback + num_capture;
dev_dbg(sdev->dev, "detected %d playback and %d capture streams\n",
num_playback, num_capture);
if (num_playback >= SOF_HDA_PLAYBACK_STREAMS) {
dev_err(sdev->dev, "error: too many playback streams %d\n",
num_playback);
return -EINVAL;
}
if (num_capture >= SOF_HDA_CAPTURE_STREAMS) {
dev_err(sdev->dev, "error: too many capture streams %d\n",
num_playback);
return -EINVAL;
}
/*
* mem alloc for the position buffer
* TODO: check position buffer update
*/
ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &pci->dev,
SOF_HDA_DPIB_ENTRY_SIZE * num_total,
&bus->posbuf);
if (ret < 0) {
dev_err(sdev->dev, "error: posbuffer dma alloc failed\n");
return -ENOMEM;
}
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
/* mem alloc for the CORB/RIRB ringbuffers */
ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &pci->dev,
PAGE_SIZE, &bus->rb);
if (ret < 0) {
dev_err(sdev->dev, "error: RB alloc failed\n");
return -ENOMEM;
}
#endif
/* create capture streams */
for (i = 0; i < num_capture; i++) {
struct sof_intel_hda_stream *hda_stream;
hda_stream = devm_kzalloc(sdev->dev, sizeof(*hda_stream),
GFP_KERNEL);
if (!hda_stream)
return -ENOMEM;
hda_stream->sdev = sdev;
hext_stream = &hda_stream->hext_stream;
hext_stream->pphc_addr = sdev->bar[HDA_DSP_PP_BAR] +
SOF_HDA_PPHC_BASE + SOF_HDA_PPHC_INTERVAL * i;
hext_stream->pplc_addr = sdev->bar[HDA_DSP_PP_BAR] +
SOF_HDA_PPLC_BASE + SOF_HDA_PPLC_MULTI * num_total +
SOF_HDA_PPLC_INTERVAL * i;
/* do we support SPIB */
if (sdev->bar[HDA_DSP_SPIB_BAR]) {
hext_stream->spib_addr = sdev->bar[HDA_DSP_SPIB_BAR] +
SOF_HDA_SPIB_BASE + SOF_HDA_SPIB_INTERVAL * i +
SOF_HDA_SPIB_SPIB;
hext_stream->fifo_addr = sdev->bar[HDA_DSP_SPIB_BAR] +
SOF_HDA_SPIB_BASE + SOF_HDA_SPIB_INTERVAL * i +
SOF_HDA_SPIB_MAXFIFO;
}
hstream = &hext_stream->hstream;
hstream->bus = bus;
hstream->sd_int_sta_mask = 1 << i;
hstream->index = i;
sd_offset = SOF_STREAM_SD_OFFSET(hstream);
hstream->sd_addr = sdev->bar[HDA_DSP_HDA_BAR] + sd_offset;
hstream->stream_tag = i + 1;
hstream->opened = false;
hstream->running = false;
hstream->direction = SNDRV_PCM_STREAM_CAPTURE;
/* memory alloc for stream BDL */
ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &pci->dev,
HDA_DSP_BDL_SIZE, &hstream->bdl);
if (ret < 0) {
dev_err(sdev->dev, "error: stream bdl dma alloc failed\n");
return -ENOMEM;
}
hstream->posbuf = (__le32 *)(bus->posbuf.area +
(hstream->index) * 8);
list_add_tail(&hstream->list, &bus->stream_list);
}
/* create playback streams */
for (i = num_capture; i < num_total; i++) {
struct sof_intel_hda_stream *hda_stream;
hda_stream = devm_kzalloc(sdev->dev, sizeof(*hda_stream),
GFP_KERNEL);
if (!hda_stream)
return -ENOMEM;
hda_stream->sdev = sdev;
hext_stream = &hda_stream->hext_stream;
/* we always have DSP support */
hext_stream->pphc_addr = sdev->bar[HDA_DSP_PP_BAR] +
SOF_HDA_PPHC_BASE + SOF_HDA_PPHC_INTERVAL * i;
hext_stream->pplc_addr = sdev->bar[HDA_DSP_PP_BAR] +
SOF_HDA_PPLC_BASE + SOF_HDA_PPLC_MULTI * num_total +
SOF_HDA_PPLC_INTERVAL * i;
/* do we support SPIB */
if (sdev->bar[HDA_DSP_SPIB_BAR]) {
hext_stream->spib_addr = sdev->bar[HDA_DSP_SPIB_BAR] +
SOF_HDA_SPIB_BASE + SOF_HDA_SPIB_INTERVAL * i +
SOF_HDA_SPIB_SPIB;
hext_stream->fifo_addr = sdev->bar[HDA_DSP_SPIB_BAR] +
SOF_HDA_SPIB_BASE + SOF_HDA_SPIB_INTERVAL * i +
SOF_HDA_SPIB_MAXFIFO;
}
hstream = &hext_stream->hstream;
hstream->bus = bus;
hstream->sd_int_sta_mask = 1 << i;
hstream->index = i;
sd_offset = SOF_STREAM_SD_OFFSET(hstream);
hstream->sd_addr = sdev->bar[HDA_DSP_HDA_BAR] + sd_offset;
hstream->stream_tag = i - num_capture + 1;
hstream->opened = false;
hstream->running = false;
hstream->direction = SNDRV_PCM_STREAM_PLAYBACK;
/* mem alloc for stream BDL */
ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &pci->dev,
HDA_DSP_BDL_SIZE, &hstream->bdl);
if (ret < 0) {
dev_err(sdev->dev, "error: stream bdl dma alloc failed\n");
return -ENOMEM;
}
hstream->posbuf = (__le32 *)(bus->posbuf.area +
(hstream->index) * 8);
list_add_tail(&hstream->list, &bus->stream_list);
}
/* store total stream count (playback + capture) from GCAP */
sof_hda->stream_max = num_total;
return 0;
}
void hda_dsp_stream_free(struct snd_sof_dev *sdev)
{
struct hdac_bus *bus = sof_to_bus(sdev);
struct hdac_stream *s, *_s;
struct hdac_ext_stream *hext_stream;
struct sof_intel_hda_stream *hda_stream;
/* free position buffer */
if (bus->posbuf.area)
snd_dma_free_pages(&bus->posbuf);
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
/* free position buffer */
if (bus->rb.area)
snd_dma_free_pages(&bus->rb);
#endif
list_for_each_entry_safe(s, _s, &bus->stream_list, list) {
/* TODO: decouple */
/* free bdl buffer */
if (s->bdl.area)
snd_dma_free_pages(&s->bdl);
list_del(&s->list);
hext_stream = stream_to_hdac_ext_stream(s);
hda_stream = container_of(hext_stream, struct sof_intel_hda_stream,
hext_stream);
devm_kfree(sdev->dev, hda_stream);
}
}
snd_pcm_uframes_t hda_dsp_stream_get_position(struct hdac_stream *hstream,
int direction, bool can_sleep)
{
struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
struct sof_intel_hda_stream *hda_stream = hstream_to_sof_hda_stream(hext_stream);
struct snd_sof_dev *sdev = hda_stream->sdev;
snd_pcm_uframes_t pos;
switch (sof_hda_position_quirk) {
case SOF_HDA_POSITION_QUIRK_USE_SKYLAKE_LEGACY:
/*
* This legacy code, inherited from the Skylake driver,
* mixes DPIB registers and DPIB DDR updates and
* does not seem to follow any known hardware recommendations.
* It's not clear e.g. why there is a different flow
* for capture and playback, the only information that matters is
* what traffic class is used, and on all SOF-enabled platforms
* only VC0 is supported so the work-around was likely not necessary
* and quite possibly wrong.
*/
/* DPIB/posbuf position mode:
* For Playback, Use DPIB register from HDA space which
* reflects the actual data transferred.
* For Capture, Use the position buffer for pointer, as DPIB
* is not accurate enough, its update may be completed
* earlier than the data written to DDR.
*/
if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
pos = snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR,
AZX_REG_VS_SDXDPIB_XBASE +
(AZX_REG_VS_SDXDPIB_XINTERVAL *
hstream->index));
} else {
/*
* For capture stream, we need more workaround to fix the
* position incorrect issue:
*
* 1. Wait at least 20us before reading position buffer after
* the interrupt generated(IOC), to make sure position update
* happens on frame boundary i.e. 20.833uSec for 48KHz.
* 2. Perform a dummy Read to DPIB register to flush DMA
* position value.
* 3. Read the DMA Position from posbuf. Now the readback
* value should be >= period boundary.
*/
if (can_sleep)
usleep_range(20, 21);
snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR,
AZX_REG_VS_SDXDPIB_XBASE +
(AZX_REG_VS_SDXDPIB_XINTERVAL *
hstream->index));
pos = snd_hdac_stream_get_pos_posbuf(hstream);
}
break;
case SOF_HDA_POSITION_QUIRK_USE_DPIB_REGISTERS:
/*
* In case VC1 traffic is disabled this is the recommended option
*/
pos = snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR,
AZX_REG_VS_SDXDPIB_XBASE +
(AZX_REG_VS_SDXDPIB_XINTERVAL *
hstream->index));
break;
case SOF_HDA_POSITION_QUIRK_USE_DPIB_DDR_UPDATE:
/*
* This is the recommended option when VC1 is enabled.
* While this isn't needed for SOF platforms it's added for
* consistency and debug.
*/
pos = snd_hdac_stream_get_pos_posbuf(hstream);
break;
default:
dev_err_once(sdev->dev, "hda_position_quirk value %d not supported\n",
sof_hda_position_quirk);
pos = 0;
break;
}
if (pos >= hstream->bufsize)
pos = 0;
return pos;
}
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