Audio signal processing has the requirement for memory to
memory similar as Video.
This patch is to add this support in v4l2 framework, defined
new buffer type V4L2_BUF_TYPE_AUDIO_CAPTURE and
V4L2_BUF_TYPE_AUDIO_OUTPUT, defined new format v4l2_audio_format
for audio case usage.
The created audio device is named "/dev/audioX".
And add memory to memory support for two kinds of i.MX ASRC
module
Shengjiu Wang (6):
media: v4l2: Add audio capture and output support
ASoC: fsl_asrc: define functions for memory to memory usage
ASoC: fsl_easrc: define functions for memory to memory usage
ASoC: fsl_asrc: Add memory to memory driver
ASoC: fsl_asrc: enable memory to memory function
ASoC: fsl_easrc: enable memory to memory function
.../media/common/videobuf2/videobuf2-v4l2.c | 4 +
drivers/media/v4l2-core/v4l2-dev.c | 17 +
drivers/media/v4l2-core/v4l2-ioctl.c | 52 ++
include/media/v4l2-dev.h | 2 +
include/media/v4l2-ioctl.h | 34 +
include/uapi/linux/videodev2.h | 19 +
sound/soc/fsl/Kconfig | 13 +
sound/soc/fsl/Makefile | 2 +
sound/soc/fsl/fsl_asrc.c | 175 +++-
sound/soc/fsl/fsl_asrc.h | 2 +
sound/soc/fsl/fsl_asrc_common.h | 54 ++
sound/soc/fsl/fsl_asrc_m2m.c | 878 ++++++++++++++++++
sound/soc/fsl/fsl_asrc_m2m.h | 48 +
sound/soc/fsl/fsl_easrc.c | 255 ++++-
sound/soc/fsl/fsl_easrc.h | 6 +
15 files changed, 1557 insertions(+), 4 deletions(-)
create mode 100644 sound/soc/fsl/fsl_asrc_m2m.c
create mode 100644 sound/soc/fsl/fsl_asrc_m2m.h
--
2.34.1
ASRC can be used on memory to memory case, define several
functions for m2m usage.
m2m_start_part_one: first part of the start steps
m2m_start_part_two: second part of the start steps
m2m_stop_part_one: first part of stop steps
m2m_stop_part_two: second part of stop steps
m2m_check_format: check format is supported or not
m2m_calc_out_len: calculate output length according to input length
m2m_get_maxburst: burst size for dma
m2m_pair_suspend: suspend function of pair
m2m_pair_resume: resume function of pair
get_output_fifo_size: get remaining data size in FIFO
Signed-off-by: Shengjiu Wang <[email protected]>
---
sound/soc/fsl/fsl_asrc.c | 138 ++++++++++++++++++++++++++++++++
sound/soc/fsl/fsl_asrc.h | 2 +
sound/soc/fsl/fsl_asrc_common.h | 54 +++++++++++++
3 files changed, 194 insertions(+)
diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
index adb8a59de2bd..30190ccb74e7 100644
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -1063,6 +1063,135 @@ static int fsl_asrc_get_fifo_addr(u8 dir, enum asrc_pair_index index)
return REG_ASRDx(dir, index);
}
+/* Get sample numbers in FIFO */
+static unsigned int fsl_asrc_get_output_fifo_size(struct fsl_asrc_pair *pair)
+{
+ struct fsl_asrc *asrc = pair->asrc;
+ enum asrc_pair_index index = pair->index;
+ u32 val;
+
+ regmap_read(asrc->regmap, REG_ASRFST(index), &val);
+
+ val &= ASRFSTi_OUTPUT_FIFO_MASK;
+
+ return val >> ASRFSTi_OUTPUT_FIFO_SHIFT;
+}
+
+static int fsl_asrc_m2m_start_part_one(struct fsl_asrc_pair *pair)
+{
+ struct fsl_asrc_pair_priv *pair_priv = pair->private;
+ struct fsl_asrc *asrc = pair->asrc;
+ struct device *dev = &asrc->pdev->dev;
+ struct asrc_config config;
+ int ret;
+
+ /* fill config */
+ config.pair = pair->index;
+ config.channel_num = pair->channels;
+ config.input_sample_rate = pair->rate[IN];
+ config.output_sample_rate = pair->rate[OUT];
+ config.input_format = pair->sample_format[IN];
+ config.output_format = pair->sample_format[OUT];
+ config.inclk = INCLK_NONE;
+ config.outclk = OUTCLK_ASRCK1_CLK;
+
+ pair_priv->config = &config;
+ ret = fsl_asrc_config_pair(pair, true);
+ if (ret) {
+ dev_err(dev, "failed to config pair: %d\n", ret);
+ return ret;
+ }
+
+ fsl_asrc_start_pair(pair);
+
+ return 0;
+}
+
+static int fsl_asrc_m2m_start_part_two(struct fsl_asrc_pair *pair)
+{
+ /*
+ * Clear DMA request during the stall state of ASRC:
+ * During STALL state, the remaining in input fifo would never be
+ * smaller than the input threshold while the output fifo would not
+ * be bigger than output one. Thus the DMA request would be cleared.
+ */
+ fsl_asrc_set_watermarks(pair, ASRC_FIFO_THRESHOLD_MIN,
+ ASRC_FIFO_THRESHOLD_MAX);
+
+ /* Update the real input threshold to raise DMA request */
+ fsl_asrc_set_watermarks(pair, ASRC_M2M_INPUTFIFO_WML,
+ ASRC_M2M_OUTPUTFIFO_WML);
+
+ return 0;
+}
+
+static int fsl_asrc_m2m_stop_part_one(struct fsl_asrc_pair *pair)
+{
+ fsl_asrc_stop_pair(pair);
+
+ return 0;
+}
+
+static int fsl_asrc_m2m_check_format(u8 dir, u32 rate, u32 channels, u32 format)
+{
+ u64 support_format = FSL_ASRC_FORMATS;
+
+ if (channels < 1 || channels > 10)
+ return -EINVAL;
+
+ if (rate < 5512 || rate > 192000)
+ return -EINVAL;
+
+ if (dir == IN)
+ support_format |= SNDRV_PCM_FMTBIT_S8;
+
+ if (!(1 << format & support_format))
+ return -EINVAL;
+
+ return 0;
+}
+
+/* calculate capture data length according to output data length and sample rate */
+static int fsl_asrc_m2m_calc_out_len(struct fsl_asrc_pair *pair, int input_buffer_length)
+{
+ unsigned int in_width, out_width;
+ unsigned int channels = pair->channels;
+ unsigned int in_samples, out_samples;
+ unsigned int out_length;
+
+ in_width = snd_pcm_format_physical_width(pair->sample_format[IN]) / 8;
+ out_width = snd_pcm_format_physical_width(pair->sample_format[OUT]) / 8;
+
+ in_samples = input_buffer_length / in_width / channels;
+ out_samples = pair->rate[OUT] * in_samples / pair->rate[IN];
+ out_length = (out_samples - ASRC_OUTPUT_LAST_SAMPLE) * out_width * channels;
+
+ return out_length;
+}
+
+static int fsl_asrc_m2m_get_maxburst(u8 dir, struct fsl_asrc_pair *pair)
+{
+ struct fsl_asrc *asrc = pair->asrc;
+ struct fsl_asrc_priv *asrc_priv = asrc->private;
+ int wml = (dir == IN) ? ASRC_M2M_INPUTFIFO_WML : ASRC_M2M_OUTPUTFIFO_WML;
+
+ if (!asrc_priv->soc->use_edma)
+ return wml * pair->channels;
+ else
+ return 1;
+}
+
+static int fsl_asrc_m2m_pair_resume(struct fsl_asrc_pair *pair)
+{
+ struct fsl_asrc *asrc = pair->asrc;
+ int i;
+
+ for (i = 0; i < pair->channels * 4; i++)
+ regmap_write(asrc->regmap, REG_ASRDI(pair->index), 0);
+
+ return 0;
+}
+
static int fsl_asrc_runtime_resume(struct device *dev);
static int fsl_asrc_runtime_suspend(struct device *dev);
@@ -1147,6 +1276,15 @@ static int fsl_asrc_probe(struct platform_device *pdev)
asrc->get_fifo_addr = fsl_asrc_get_fifo_addr;
asrc->pair_priv_size = sizeof(struct fsl_asrc_pair_priv);
+ asrc->m2m_start_part_one = fsl_asrc_m2m_start_part_one;
+ asrc->m2m_start_part_two = fsl_asrc_m2m_start_part_two;
+ asrc->m2m_stop_part_one = fsl_asrc_m2m_stop_part_one;
+ asrc->get_output_fifo_size = fsl_asrc_get_output_fifo_size;
+ asrc->m2m_check_format = fsl_asrc_m2m_check_format;
+ asrc->m2m_calc_out_len = fsl_asrc_m2m_calc_out_len;
+ asrc->m2m_get_maxburst = fsl_asrc_m2m_get_maxburst;
+ asrc->m2m_pair_resume = fsl_asrc_m2m_pair_resume;
+
if (of_device_is_compatible(np, "fsl,imx35-asrc")) {
asrc_priv->clk_map[IN] = input_clk_map_imx35;
asrc_priv->clk_map[OUT] = output_clk_map_imx35;
diff --git a/sound/soc/fsl/fsl_asrc.h b/sound/soc/fsl/fsl_asrc.h
index 86d2422ad606..1c492eb237f5 100644
--- a/sound/soc/fsl/fsl_asrc.h
+++ b/sound/soc/fsl/fsl_asrc.h
@@ -12,6 +12,8 @@
#include "fsl_asrc_common.h"
+#define ASRC_M2M_INPUTFIFO_WML 0x4
+#define ASRC_M2M_OUTPUTFIFO_WML 0x2
#define ASRC_DMA_BUFFER_NUM 2
#define ASRC_INPUTFIFO_THRESHOLD 32
#define ASRC_OUTPUTFIFO_THRESHOLD 32
diff --git a/sound/soc/fsl/fsl_asrc_common.h b/sound/soc/fsl/fsl_asrc_common.h
index 7e1c13ca37f1..9294f378f0cc 100644
--- a/sound/soc/fsl/fsl_asrc_common.h
+++ b/sound/soc/fsl/fsl_asrc_common.h
@@ -4,6 +4,10 @@
*
*/
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fh.h>
+
#ifndef _FSL_ASRC_COMMON_H
#define _FSL_ASRC_COMMON_H
@@ -34,6 +38,13 @@ enum asrc_pair_index {
* @pos: hardware pointer position
* @req_dma_chan: flag to release dev_to_dev chan
* @private: pair private area
+ * @complete: dma task complete
+ * @fh: v4l2 file handler
+ * @ctrl_handler: v4l2 control handler
+ * @sample_format: format of m2m
+ * @rate: rate of m2m
+ * @buf_len: buffer length of m2m
+ * @req_pair: flag for request pair
*/
struct fsl_asrc_pair {
struct fsl_asrc *asrc;
@@ -49,6 +60,15 @@ struct fsl_asrc_pair {
bool req_dma_chan;
void *private;
+
+ /* used for m2m */
+ struct completion complete[2];
+ struct v4l2_fh fh;
+ struct v4l2_ctrl_handler ctrl_handler;
+ snd_pcm_format_t sample_format[2];
+ unsigned int rate[2];
+ unsigned int buf_len[2];
+ bool req_pair;
};
/**
@@ -63,6 +83,10 @@ struct fsl_asrc_pair {
* @ipg_clk: clock source to drive peripheral
* @spba_clk: SPBA clock (optional, depending on SoC design)
* @lock: spin lock for resource protection
+ * @v4l2_dev: v4l2 device structure
+ * @m2m_dev: pointer to v4l2_m2m_dev
+ * @dec_vdev: pointer to video_device
+ * @mlock: v4l2 ioctls serialization
* @pair: pair pointers
* @channel_avail: non-occupied channel numbers
* @asrc_rate: default sample rate for ASoC Back-Ends
@@ -72,6 +96,17 @@ struct fsl_asrc_pair {
* @request_pair: function pointer
* @release_pair: function pointer
* @get_fifo_addr: function pointer
+ * @m2m_start_part_one: function pointer
+ * @m2m_start_part_two: function pointer
+ * @m2m_stop_part_one: function pointer
+ * @m2m_stop_part_two: function pointer
+ * @m2m_check_format: function pointer
+ * @m2m_calc_out_len: function pointer
+ * @m2m_get_maxburst: function pointer
+ * @m2m_pair_suspend: function pointer
+ * @m2m_pair_resume: function pointer
+ * @m2m_set_ratio_mod: function pointer
+ * @get_output_fifo_size: function pointer
* @pair_priv_size: size of pair private struct.
* @private: private data structure
*/
@@ -86,6 +121,11 @@ struct fsl_asrc {
struct clk *spba_clk;
spinlock_t lock; /* spin lock for resource protection */
+ struct v4l2_device v4l2_dev;
+ struct v4l2_m2m_dev *m2m_dev;
+ struct video_device *dec_vdev;
+ struct mutex mlock; /* v4l2 ioctls serialization */
+
struct fsl_asrc_pair *pair[PAIR_CTX_NUM];
unsigned int channel_avail;
@@ -97,6 +137,20 @@ struct fsl_asrc {
int (*request_pair)(int channels, struct fsl_asrc_pair *pair);
void (*release_pair)(struct fsl_asrc_pair *pair);
int (*get_fifo_addr)(u8 dir, enum asrc_pair_index index);
+
+ int (*m2m_start_part_one)(struct fsl_asrc_pair *pair);
+ int (*m2m_start_part_two)(struct fsl_asrc_pair *pair);
+ int (*m2m_stop_part_one)(struct fsl_asrc_pair *pair);
+ int (*m2m_stop_part_two)(struct fsl_asrc_pair *pair);
+
+ int (*m2m_check_format)(u8 dir, u32 rate, u32 channels, u32 format);
+ int (*m2m_calc_out_len)(struct fsl_asrc_pair *pair, int input_buffer_length);
+ int (*m2m_get_maxburst)(u8 dir, struct fsl_asrc_pair *pair);
+ int (*m2m_pair_suspend)(struct fsl_asrc_pair *pair);
+ int (*m2m_pair_resume)(struct fsl_asrc_pair *pair);
+ int (*m2m_set_ratio_mod)(struct fsl_asrc_pair *pair, int val);
+
+ unsigned int (*get_output_fifo_size)(struct fsl_asrc_pair *pair);
size_t pair_priv_size;
void *private;
--
2.34.1
Implement the ASRC memory to memory function using
the v4l2 framework, user can use this function with
v4l2 ioctl interface.
User send the output and capture buffer to driver and
driver store the converted data to the capture buffer.
This feature can be shared by ASRC and EASRC drivers
Signed-off-by: Shengjiu Wang <[email protected]>
---
sound/soc/fsl/Kconfig | 13 +
sound/soc/fsl/Makefile | 2 +
sound/soc/fsl/fsl_asrc_m2m.c | 878 +++++++++++++++++++++++++++++++++++
sound/soc/fsl/fsl_asrc_m2m.h | 48 ++
4 files changed, 941 insertions(+)
create mode 100644 sound/soc/fsl/fsl_asrc_m2m.c
create mode 100644 sound/soc/fsl/fsl_asrc_m2m.h
diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index 725c530a3636..b61087c20a1d 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -14,6 +14,19 @@ config SND_SOC_FSL_ASRC
This option is only useful for out-of-tree drivers since
in-tree drivers select it automatically.
+config SND_SOC_FSL_ASRC_M2M
+ tristate "Asynchronous Sample Rate Converter (ASRC) M2M support"
+ depends on SND_SOC_FSL_ASRC
+ depends on V4L_MEM2MEM_DRIVERS
+ depends on MEDIA_SUPPORT
+ select VIDEOBUF2_DMA_CONTIG
+ select V4L2_MEM2MEM_DEV
+ help
+ Say Y if you want to add ASRC M2M support for NXP CPUs.
+ It is a completement for ASRC M2P and ASRC P2M features.
+ This option is only useful for out-of-tree drivers since
+ in-tree drivers select it automatically.
+
config SND_SOC_FSL_SAI
tristate "Synchronous Audio Interface (SAI) module support"
select REGMAP_MMIO
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index 8db7e97d0bd5..02182fa4cf02 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_SND_SOC_P1022_RDK) += snd-soc-p1022-rdk.o
snd-soc-fsl-audmix-objs := fsl_audmix.o
snd-soc-fsl-asoc-card-objs := fsl-asoc-card.o
snd-soc-fsl-asrc-objs := fsl_asrc.o fsl_asrc_dma.o
+snd-soc-fsl-asrc-m2m-objs := fsl_asrc_m2m.o
snd-soc-fsl-sai-objs := fsl_sai.o
snd-soc-fsl-ssi-y := fsl_ssi.o
snd-soc-fsl-ssi-$(CONFIG_DEBUG_FS) += fsl_ssi_dbg.o
@@ -33,6 +34,7 @@ snd-soc-fsl-qmc-audio-objs := fsl_qmc_audio.o
obj-$(CONFIG_SND_SOC_FSL_AUDMIX) += snd-soc-fsl-audmix.o
obj-$(CONFIG_SND_SOC_FSL_ASOC_CARD) += snd-soc-fsl-asoc-card.o
obj-$(CONFIG_SND_SOC_FSL_ASRC) += snd-soc-fsl-asrc.o
+obj-$(CONFIG_SND_SOC_FSL_ASRC_M2M) += snd-soc-fsl-asrc-m2m.o
obj-$(CONFIG_SND_SOC_FSL_SAI) += snd-soc-fsl-sai.o
obj-$(CONFIG_SND_SOC_FSL_SSI) += snd-soc-fsl-ssi.o
obj-$(CONFIG_SND_SOC_FSL_SPDIF) += snd-soc-fsl-spdif.o
diff --git a/sound/soc/fsl/fsl_asrc_m2m.c b/sound/soc/fsl/fsl_asrc_m2m.c
new file mode 100644
index 000000000000..02fe420793af
--- /dev/null
+++ b/sound/soc/fsl/fsl_asrc_m2m.c
@@ -0,0 +1,878 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2014-2016 Freescale Semiconductor, Inc.
+// Copyright (C) 2019-2023 NXP
+//
+// Freescale ASRC Memory to Memory (M2M) driver
+
+#include <linux/dma/imx-dma.h>
+#include <linux/pm_runtime.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-mem2mem.h>
+#include <media/videobuf2-dma-contig.h>
+#include <sound/dmaengine_pcm.h>
+#include "fsl_asrc.h"
+#include "fsl_asrc_m2m.h"
+
+#define ASRC_M2M_BUFFER_SIZE (512 * 1024)
+#define ASRC_M2M_PERIOD_SIZE (48 * 1024)
+#define ASRC_M2M_SG_NUM (20)
+
+static inline struct fsl_asrc_pair *fsl_asrc_m2m_fh_to_ctx(struct v4l2_fh *fh)
+{
+ return container_of(fh, struct fsl_asrc_pair, fh);
+}
+
+/**
+ * fsl_asrc_read_last_fifo: read all the remaining data from FIFO
+ * @pair: Structure pointer of fsl_asrc_pair
+ * @dma_vaddr: virtual address of capture buffer
+ * @length: payload length of capture buffer
+ */
+static void fsl_asrc_read_last_fifo(struct fsl_asrc_pair *pair, void *dma_vaddr, u32 *length)
+{
+ struct fsl_asrc *asrc = pair->asrc;
+ enum asrc_pair_index index = pair->index;
+ u32 i, reg, size, t_size = 0, width;
+ u32 *reg32 = NULL;
+ u16 *reg16 = NULL;
+ u8 *reg24 = NULL;
+
+ width = snd_pcm_format_physical_width(pair->sample_format[V4L_CAP]);
+ if (width == 32)
+ reg32 = dma_vaddr + *length;
+ else if (width == 16)
+ reg16 = dma_vaddr + *length;
+ else
+ reg24 = dma_vaddr + *length;
+retry:
+ size = asrc->get_output_fifo_size(pair);
+ if (size + *length > ASRC_M2M_BUFFER_SIZE)
+ goto end;
+
+ for (i = 0; i < size * pair->channels; i++) {
+ regmap_read(asrc->regmap, asrc->get_fifo_addr(OUT, index), ®);
+ if (reg32) {
+ *(reg32) = reg;
+ reg32++;
+ } else if (reg16) {
+ *(reg16) = (u16)reg;
+ reg16++;
+ } else {
+ *reg24++ = (u8)reg;
+ *reg24++ = (u8)(reg >> 8);
+ *reg24++ = (u8)(reg >> 16);
+ }
+ }
+ t_size += size;
+
+ /* In case there is data left in FIFO */
+ if (size)
+ goto retry;
+end:
+ /* Update payload length */
+ if (reg32)
+ *length += t_size * pair->channels * 4;
+ else if (reg16)
+ *length += t_size * pair->channels * 2;
+ else
+ *length += t_size * pair->channels * 3;
+}
+
+static int fsl_asrc_m2m_start_streaming(struct vb2_queue *q, unsigned int count)
+{
+ struct fsl_asrc_pair *pair = vb2_get_drv_priv(q);
+ struct fsl_asrc *asrc = pair->asrc;
+ struct device *dev = &asrc->pdev->dev;
+ struct vb2_v4l2_buffer *buf;
+ bool request_flag = false;
+ int ret;
+
+ dev_dbg(dev, "Start streaming pair=%p, %d\n", pair, q->type);
+
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0) {
+ dev_err(dev, "Failed to power up asrc\n");
+ goto err_pm_runtime;
+ }
+
+ /* Request asrc pair/context */
+ if (!pair->req_pair) {
+ /* flag for error handler of this function */
+ request_flag = true;
+
+ ret = asrc->request_pair(pair->channels, pair);
+ if (ret) {
+ dev_err(dev, "failed to request pair: %d\n", ret);
+ goto err_request_pair;
+ }
+
+ ret = asrc->m2m_start_part_one(pair);
+ if (ret) {
+ dev_err(dev, "failed to start pair part one: %d\n", ret);
+ goto err_start_part_one;
+ }
+
+ pair->req_pair = true;
+ }
+
+ /* Request dma channels */
+ if (V4L2_TYPE_IS_OUTPUT(q->type)) {
+ pair->dma_chan[V4L_OUT] = asrc->get_dma_channel(pair, IN);
+ if (!pair->dma_chan[V4L_OUT]) {
+ dev_err(dev, "[ctx%d] failed to get input DMA channel\n", pair->index);
+ ret = -EBUSY;
+ goto err_dma_channel;
+ }
+ } else {
+ pair->dma_chan[V4L_CAP] = asrc->get_dma_channel(pair, OUT);
+ if (!pair->dma_chan[V4L_CAP]) {
+ dev_err(dev, "[ctx%d] failed to get output DMA channel\n", pair->index);
+ ret = -EBUSY;
+ goto err_dma_channel;
+ }
+ }
+
+ v4l2_m2m_update_start_streaming_state(pair->fh.m2m_ctx, q);
+
+ return 0;
+
+err_dma_channel:
+ if (request_flag && asrc->m2m_stop_part_one)
+ asrc->m2m_stop_part_one(pair);
+err_start_part_one:
+ if (request_flag)
+ asrc->release_pair(pair);
+err_request_pair:
+ pm_runtime_put_sync(dev);
+err_pm_runtime:
+ /* Release buffers */
+ if (V4L2_TYPE_IS_OUTPUT(q->type)) {
+ while ((buf = v4l2_m2m_src_buf_remove(pair->fh.m2m_ctx)))
+ v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
+ } else {
+ while ((buf = v4l2_m2m_dst_buf_remove(pair->fh.m2m_ctx)))
+ v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
+ }
+ return ret;
+}
+
+static void fsl_asrc_m2m_stop_streaming(struct vb2_queue *q)
+{
+ struct fsl_asrc_pair *pair = vb2_get_drv_priv(q);
+ struct fsl_asrc *asrc = pair->asrc;
+ struct device *dev = &asrc->pdev->dev;
+
+ dev_dbg(dev, "Stop streaming pair=%p, %d\n", pair, q->type);
+
+ v4l2_m2m_update_stop_streaming_state(pair->fh.m2m_ctx, q);
+
+ /* Stop & release pair/context */
+ if (asrc->m2m_stop_part_two)
+ asrc->m2m_stop_part_two(pair);
+
+ if (pair->req_pair) {
+ if (asrc->m2m_stop_part_one)
+ asrc->m2m_stop_part_one(pair);
+ asrc->release_pair(pair);
+ pair->req_pair = false;
+ }
+
+ /* Release dma channel */
+ if (V4L2_TYPE_IS_OUTPUT(q->type)) {
+ if (pair->dma_chan[V4L_OUT])
+ dma_release_channel(pair->dma_chan[V4L_OUT]);
+ } else {
+ if (pair->dma_chan[V4L_CAP])
+ dma_release_channel(pair->dma_chan[V4L_CAP]);
+ }
+
+ pm_runtime_put_sync(dev);
+}
+
+static int fsl_asrc_m2m_queue_setup(struct vb2_queue *q,
+ unsigned int *num_buffers, unsigned int *num_planes,
+ unsigned int sizes[], struct device *alloc_devs[])
+{
+ struct fsl_asrc_pair *pair = vb2_get_drv_priv(q);
+
+ /* single buffer */
+ *num_planes = 1;
+
+ /*
+ * The capture buffer size depends on output buffer size
+ * and the convert ratio.
+ *
+ * Here just use a fix length for capture and output buffer.
+ * User need to care about it.
+ */
+
+ if (V4L2_TYPE_IS_OUTPUT(q->type))
+ sizes[0] = pair->buf_len[V4L_OUT];
+ else
+ sizes[0] = pair->buf_len[V4L_CAP];
+
+ return 0;
+}
+
+static void fsl_asrc_m2m_buf_queue(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct fsl_asrc_pair *pair = vb2_get_drv_priv(vb->vb2_queue);
+
+ /* queue buffer */
+ v4l2_m2m_buf_queue(pair->fh.m2m_ctx, vbuf);
+}
+
+static const struct vb2_ops fsl_asrc_m2m_qops = {
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .start_streaming = fsl_asrc_m2m_start_streaming,
+ .stop_streaming = fsl_asrc_m2m_stop_streaming,
+ .queue_setup = fsl_asrc_m2m_queue_setup,
+ .buf_queue = fsl_asrc_m2m_buf_queue,
+};
+
+/* Init video buffer queue for src and dst. */
+static int fsl_asrc_m2m_queue_init(void *priv, struct vb2_queue *src_vq,
+ struct vb2_queue *dst_vq)
+{
+ struct fsl_asrc_pair *pair = priv;
+ struct fsl_asrc *asrc = pair->asrc;
+ int ret;
+
+ src_vq->type = V4L2_BUF_TYPE_AUDIO_OUTPUT;
+ src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+ src_vq->drv_priv = pair;
+ src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+ src_vq->ops = &fsl_asrc_m2m_qops;
+ src_vq->mem_ops = &vb2_dma_contig_memops;
+ src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ src_vq->lock = &asrc->mlock;
+ src_vq->dev = &asrc->pdev->dev;
+ src_vq->min_buffers_needed = 1;
+
+ ret = vb2_queue_init(src_vq);
+ if (ret)
+ return ret;
+
+ dst_vq->type = V4L2_BUF_TYPE_AUDIO_CAPTURE;
+ dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+ dst_vq->drv_priv = pair;
+ dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+ dst_vq->ops = &fsl_asrc_m2m_qops;
+ dst_vq->mem_ops = &vb2_dma_contig_memops;
+ dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ dst_vq->lock = &asrc->mlock;
+ dst_vq->dev = &asrc->pdev->dev;
+ dst_vq->min_buffers_needed = 1;
+
+ ret = vb2_queue_init(dst_vq);
+ return ret;
+}
+
+static int fsl_asrc_m2m_op_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct fsl_asrc_pair *pair =
+ container_of(ctrl->handler, struct fsl_asrc_pair, ctrl_handler);
+ struct fsl_asrc *asrc = pair->asrc;
+ int ret = 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_GAIN:
+ if (asrc->m2m_set_ratio_mod)
+ asrc->m2m_set_ratio_mod(pair, ctrl->val);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops fsl_asrc_m2m_ctrl_ops = {
+ .s_ctrl = fsl_asrc_m2m_op_s_ctrl,
+};
+
+/* system callback for open() */
+static int fsl_asrc_m2m_open(struct file *file)
+{
+ struct fsl_asrc *asrc = video_drvdata(file);
+ struct video_device *vdev = video_devdata(file);
+ struct fsl_asrc_pair *pair;
+ int ret = 0;
+
+ if (mutex_lock_interruptible(&asrc->mlock))
+ return -ERESTARTSYS;
+
+ pair = kzalloc(sizeof(*pair) + asrc->pair_priv_size, GFP_KERNEL);
+ if (!pair) {
+ ret = -ENOMEM;
+ goto err_alloc;
+ }
+
+ pair->private = (void *)pair + sizeof(struct fsl_asrc_pair);
+ pair->asrc = asrc;
+ pair->buf_len[V4L_OUT] = ASRC_M2M_BUFFER_SIZE;
+ pair->buf_len[V4L_CAP] = ASRC_M2M_BUFFER_SIZE;
+
+ init_completion(&pair->complete[V4L_OUT]);
+ init_completion(&pair->complete[V4L_CAP]);
+
+ v4l2_fh_init(&pair->fh, vdev);
+ v4l2_fh_add(&pair->fh);
+ file->private_data = &pair->fh;
+
+ /* m2m context init */
+ pair->fh.m2m_ctx = v4l2_m2m_ctx_init(asrc->m2m_dev, pair,
+ fsl_asrc_m2m_queue_init);
+ if (IS_ERR(pair->fh.m2m_ctx)) {
+ ret = PTR_ERR(pair->fh.m2m_ctx);
+ goto err_ctx_init;
+ }
+
+ v4l2_ctrl_handler_init(&pair->ctrl_handler, 2);
+
+ /* use V4L2_CID_GAIN for ratio update control */
+ v4l2_ctrl_new_std(&pair->ctrl_handler, &fsl_asrc_m2m_ctrl_ops,
+ V4L2_CID_GAIN,
+ 0xFFFFFFFF80000001, 0x7fffffff, 1, 0);
+
+ if (pair->ctrl_handler.error) {
+ ret = pair->ctrl_handler.error;
+ v4l2_ctrl_handler_free(&pair->ctrl_handler);
+ goto err_ctrl_handler;
+ }
+
+ pair->fh.ctrl_handler = &pair->ctrl_handler;
+
+ mutex_unlock(&asrc->mlock);
+
+ return 0;
+
+err_ctrl_handler:
+ v4l2_m2m_ctx_release(pair->fh.m2m_ctx);
+err_ctx_init:
+ v4l2_fh_del(&pair->fh);
+ v4l2_fh_exit(&pair->fh);
+ kfree(pair);
+err_alloc:
+ mutex_unlock(&asrc->mlock);
+ return ret;
+}
+
+static int fsl_asrc_m2m_release(struct file *file)
+{
+ struct fsl_asrc *asrc = video_drvdata(file);
+ struct fsl_asrc_pair *pair = fsl_asrc_m2m_fh_to_ctx(file->private_data);
+
+ mutex_lock(&asrc->mlock);
+ v4l2_ctrl_handler_free(&pair->ctrl_handler);
+ v4l2_m2m_ctx_release(pair->fh.m2m_ctx);
+ v4l2_fh_del(&pair->fh);
+ v4l2_fh_exit(&pair->fh);
+ kfree(pair);
+ mutex_unlock(&asrc->mlock);
+
+ return 0;
+}
+
+static const struct v4l2_file_operations fsl_asrc_m2m_fops = {
+ .owner = THIS_MODULE,
+ .open = fsl_asrc_m2m_open,
+ .release = fsl_asrc_m2m_release,
+ .poll = v4l2_m2m_fop_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = v4l2_m2m_fop_mmap,
+};
+
+static int fsl_asrc_m2m_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ strscpy(cap->driver, "asrc m2m", sizeof(cap->driver));
+ strscpy(cap->card, "asrc m2m", sizeof(cap->card));
+ cap->device_caps = V4L2_CAP_AUDIO | V4L2_CAP_STREAMING;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+ return 0;
+}
+
+static int fsl_asrc_m2m_g_fmt_aud_cap(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct fsl_asrc_pair *pair = fsl_asrc_m2m_fh_to_ctx(fh);
+
+ f->fmt.audio.channels = pair->channels;
+ f->fmt.audio.rate = pair->rate[V4L_CAP];
+ f->fmt.audio.format = pair->sample_format[V4L_CAP];
+ f->fmt.audio.buffersize = pair->buf_len[V4L_CAP];
+
+ return 0;
+}
+
+static int fsl_asrc_m2m_g_fmt_aud_out(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct fsl_asrc_pair *pair = fsl_asrc_m2m_fh_to_ctx(fh);
+
+ f->fmt.audio.channels = pair->channels;
+ f->fmt.audio.rate = pair->rate[V4L_OUT];
+ f->fmt.audio.format = pair->sample_format[V4L_OUT];
+ f->fmt.audio.buffersize = pair->buf_len[V4L_OUT];
+
+ return 0;
+}
+
+/* output for asrc */
+static int fsl_asrc_m2m_s_fmt_aud_cap(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct fsl_asrc_pair *pair = fsl_asrc_m2m_fh_to_ctx(fh);
+ struct fsl_asrc *asrc = pair->asrc;
+ struct device *dev = &asrc->pdev->dev;
+ int ret;
+
+ ret = asrc->m2m_check_format(OUT, f->fmt.audio.rate,
+ f->fmt.audio.channels,
+ f->fmt.audio.format);
+ if (ret)
+ return -EINVAL;
+
+ if (pair->channels > 0 && pair->channels != f->fmt.audio.channels) {
+ dev_err(dev, "channels don't match for cap and out\n");
+ return -EINVAL;
+ }
+
+ pair->channels = f->fmt.audio.channels;
+ pair->rate[V4L_CAP] = f->fmt.audio.rate;
+ pair->sample_format[V4L_CAP] = f->fmt.audio.format;
+
+ /* Get buffer size from user */
+ if (f->fmt.audio.buffersize > pair->buf_len[V4L_CAP])
+ pair->buf_len[V4L_CAP] = f->fmt.audio.buffersize;
+
+ return 0;
+}
+
+/* input for asrc */
+static int fsl_asrc_m2m_s_fmt_aud_out(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct fsl_asrc_pair *pair = fsl_asrc_m2m_fh_to_ctx(fh);
+ struct fsl_asrc *asrc = pair->asrc;
+ struct device *dev = &asrc->pdev->dev;
+ int ret;
+
+ ret = asrc->m2m_check_format(IN, f->fmt.audio.rate,
+ f->fmt.audio.channels,
+ f->fmt.audio.format);
+ if (ret)
+ return -EINVAL;
+
+ if (pair->channels > 0 && pair->channels != f->fmt.audio.channels) {
+ dev_err(dev, "channels don't match for cap and out\n");
+ return -EINVAL;
+ }
+
+ pair->channels = f->fmt.audio.channels;
+ pair->rate[V4L_OUT] = f->fmt.audio.rate;
+ pair->sample_format[V4L_OUT] = f->fmt.audio.format;
+
+ /* Get buffer size from user */
+ if (f->fmt.audio.buffersize > pair->buf_len[V4L_OUT])
+ pair->buf_len[V4L_OUT] = f->fmt.audio.buffersize;
+
+ return 0;
+}
+
+static int fsl_asrc_m2m_try_fmt_audio_cap(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct fsl_asrc_pair *pair = fsl_asrc_m2m_fh_to_ctx(fh);
+ struct fsl_asrc *asrc = pair->asrc;
+ int ret;
+
+ ret = asrc->m2m_check_format(OUT, f->fmt.audio.rate,
+ f->fmt.audio.channels,
+ f->fmt.audio.format);
+ return ret;
+}
+
+static int fsl_asrc_m2m_try_fmt_audio_out(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct fsl_asrc_pair *pair = fsl_asrc_m2m_fh_to_ctx(fh);
+ struct fsl_asrc *asrc = pair->asrc;
+ int ret;
+
+ ret = asrc->m2m_check_format(IN, f->fmt.audio.rate,
+ f->fmt.audio.channels,
+ f->fmt.audio.format);
+ return ret;
+}
+
+static const struct v4l2_ioctl_ops fsl_asrc_m2m_ioctl_ops = {
+ .vidioc_querycap = fsl_asrc_m2m_querycap,
+
+ .vidioc_g_fmt_audio_cap = fsl_asrc_m2m_g_fmt_aud_cap,
+ .vidioc_g_fmt_audio_out = fsl_asrc_m2m_g_fmt_aud_out,
+
+ .vidioc_s_fmt_audio_cap = fsl_asrc_m2m_s_fmt_aud_cap,
+ .vidioc_s_fmt_audio_out = fsl_asrc_m2m_s_fmt_aud_out,
+
+ .vidioc_try_fmt_audio_cap = fsl_asrc_m2m_try_fmt_audio_cap,
+ .vidioc_try_fmt_audio_out = fsl_asrc_m2m_try_fmt_audio_out,
+
+ .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
+ .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
+
+ .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
+ .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
+ .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
+ .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
+ .vidioc_streamon = v4l2_m2m_ioctl_streamon,
+ .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
+};
+
+/* dma complete callback */
+static void fsl_asrc_input_dma_callback(void *data)
+{
+ struct fsl_asrc_pair *pair = (struct fsl_asrc_pair *)data;
+
+ complete(&pair->complete[V4L_OUT]);
+}
+
+/* dma complete callback */
+static void fsl_asrc_output_dma_callback(void *data)
+{
+ struct fsl_asrc_pair *pair = (struct fsl_asrc_pair *)data;
+
+ complete(&pair->complete[V4L_CAP]);
+}
+
+/* config dma channel */
+static int fsl_asrc_dmaconfig(struct fsl_asrc_pair *pair,
+ struct dma_chan *chan,
+ u32 dma_addr, dma_addr_t buf_addr, u32 buf_len,
+ int dir, int width)
+{
+ struct fsl_asrc *asrc = pair->asrc;
+ struct device *dev = &asrc->pdev->dev;
+ struct dma_slave_config slave_config;
+ struct scatterlist sg[ASRC_M2M_SG_NUM];
+ enum dma_slave_buswidth buswidth;
+ unsigned int sg_len, max_period_size;
+ int ret, i;
+
+ switch (width) {
+ case 8:
+ buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE;
+ break;
+ case 16:
+ buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
+ break;
+ case 24:
+ buswidth = DMA_SLAVE_BUSWIDTH_3_BYTES;
+ break;
+ case 32:
+ buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ break;
+ default:
+ dev_err(dev, "invalid word width\n");
+ return -EINVAL;
+ }
+
+ memset(&slave_config, 0, sizeof(slave_config));
+ if (dir == V4L_OUT) {
+ slave_config.direction = DMA_MEM_TO_DEV;
+ slave_config.dst_addr = dma_addr;
+ slave_config.dst_addr_width = buswidth;
+ slave_config.dst_maxburst = asrc->m2m_get_maxburst(IN, pair);
+ } else {
+ slave_config.direction = DMA_DEV_TO_MEM;
+ slave_config.src_addr = dma_addr;
+ slave_config.src_addr_width = buswidth;
+ slave_config.src_maxburst = asrc->m2m_get_maxburst(OUT, pair);
+ }
+
+ ret = dmaengine_slave_config(chan, &slave_config);
+ if (ret) {
+ dev_err(dev, "failed to config dmaengine for %s task: %d\n",
+ DIR_STR(dir), ret);
+ return -EINVAL;
+ }
+
+ max_period_size = rounddown(ASRC_M2M_PERIOD_SIZE, width * pair->channels / 8);
+ /* scatter gather mode */
+ sg_len = buf_len / max_period_size;
+ if (buf_len % max_period_size)
+ sg_len += 1;
+
+ sg_init_table(sg, sg_len);
+ for (i = 0; i < (sg_len - 1); i++) {
+ sg_dma_address(&sg[i]) = buf_addr + i * max_period_size;
+ sg_dma_len(&sg[i]) = max_period_size;
+ }
+ sg_dma_address(&sg[i]) = buf_addr + i * max_period_size;
+ sg_dma_len(&sg[i]) = buf_len - i * max_period_size;
+
+ pair->desc[dir] = dmaengine_prep_slave_sg(chan, sg, sg_len,
+ slave_config.direction,
+ DMA_PREP_INTERRUPT);
+ if (!pair->desc[dir]) {
+ dev_err(dev, "failed to prepare dmaengine for %s task\n", DIR_STR(dir));
+ return -EINVAL;
+ }
+
+ pair->desc[dir]->callback = ASRC_xPUT_DMA_CALLBACK(dir);
+ pair->desc[dir]->callback_param = pair;
+
+ return 0;
+}
+
+/* main function of converter */
+static void fsl_asrc_m2m_device_run(void *priv)
+{
+ struct fsl_asrc_pair *pair = priv;
+ struct fsl_asrc *asrc = pair->asrc;
+ struct device *dev = &asrc->pdev->dev;
+ enum asrc_pair_index index = pair->index;
+ struct vb2_v4l2_buffer *src_buf, *dst_buf;
+ unsigned int out_buf_len;
+ unsigned int cap_dma_len;
+ unsigned int width;
+ u32 fifo_addr;
+ int ret;
+
+ src_buf = v4l2_m2m_next_src_buf(pair->fh.m2m_ctx);
+ dst_buf = v4l2_m2m_next_dst_buf(pair->fh.m2m_ctx);
+
+ width = snd_pcm_format_physical_width(pair->sample_format[V4L_OUT]);
+ fifo_addr = asrc->paddr + asrc->get_fifo_addr(IN, index);
+ out_buf_len = vb2_get_plane_payload(&src_buf->vb2_buf, 0);
+ if (out_buf_len < width * pair->channels / 8 ||
+ out_buf_len > ASRC_M2M_BUFFER_SIZE ||
+ out_buf_len % (width * pair->channels / 8)) {
+ dev_err(dev, "out buffer size is error: [%d]\n", out_buf_len);
+ goto end;
+ }
+
+ /* dma config for output dma channel */
+ ret = fsl_asrc_dmaconfig(pair,
+ pair->dma_chan[V4L_OUT],
+ fifo_addr,
+ vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0),
+ out_buf_len, V4L_OUT, width);
+ if (ret) {
+ dev_err(dev, "out dma config error\n");
+ goto end;
+ }
+
+ width = snd_pcm_format_physical_width(pair->sample_format[V4L_CAP]);
+ fifo_addr = asrc->paddr + asrc->get_fifo_addr(OUT, index);
+ cap_dma_len = asrc->m2m_calc_out_len(pair, out_buf_len);
+ if (cap_dma_len > 0 && cap_dma_len <= ASRC_M2M_BUFFER_SIZE) {
+ /* dma config for capture dma channel */
+ ret = fsl_asrc_dmaconfig(pair,
+ pair->dma_chan[V4L_CAP],
+ fifo_addr,
+ vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0),
+ cap_dma_len, V4L_CAP, width);
+ if (ret) {
+ dev_err(dev, "cap dma config error\n");
+ goto end;
+ }
+ } else if (cap_dma_len > ASRC_M2M_BUFFER_SIZE) {
+ dev_err(dev, "cap buffer size error\n");
+ goto end;
+ }
+
+ reinit_completion(&pair->complete[V4L_OUT]);
+ reinit_completion(&pair->complete[V4L_CAP]);
+
+ /* Submit DMA request */
+ dmaengine_submit(pair->desc[V4L_OUT]);
+ dma_async_issue_pending(pair->desc[V4L_OUT]->chan);
+ if (cap_dma_len > 0) {
+ dmaengine_submit(pair->desc[V4L_CAP]);
+ dma_async_issue_pending(pair->desc[V4L_CAP]->chan);
+ }
+
+ asrc->m2m_start_part_two(pair);
+
+ if (!wait_for_completion_interruptible_timeout(&pair->complete[V4L_OUT], 10 * HZ)) {
+ dev_err(dev, "out DMA task timeout\n");
+ goto end;
+ }
+
+ if (cap_dma_len > 0) {
+ if (!wait_for_completion_interruptible_timeout(&pair->complete[V4L_CAP], 10 * HZ)) {
+ dev_err(dev, "cap DMA task timeout\n");
+ goto end;
+ }
+ }
+
+ /* read the last words from FIFO */
+ fsl_asrc_read_last_fifo(pair, vb2_plane_vaddr(&dst_buf->vb2_buf, 0), &cap_dma_len);
+ /* update payload length for capture */
+ vb2_set_plane_payload(&dst_buf->vb2_buf, 0, cap_dma_len);
+
+end:
+ src_buf = v4l2_m2m_src_buf_remove(pair->fh.m2m_ctx);
+ dst_buf = v4l2_m2m_dst_buf_remove(pair->fh.m2m_ctx);
+
+ v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_DONE);
+ v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_DONE);
+
+ v4l2_m2m_job_finish(asrc->m2m_dev, pair->fh.m2m_ctx);
+}
+
+static int fsl_asrc_m2m_job_ready(void *priv)
+{
+ struct fsl_asrc_pair *pair = priv;
+
+ if (v4l2_m2m_num_src_bufs_ready(pair->fh.m2m_ctx) > 0 &&
+ v4l2_m2m_num_dst_bufs_ready(pair->fh.m2m_ctx) > 0) {
+ return 1;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_m2m_ops fsl_asrc_m2m_ops = {
+ .job_ready = fsl_asrc_m2m_job_ready,
+ .device_run = fsl_asrc_m2m_device_run,
+};
+
+int fsl_asrc_m2m_probe(struct fsl_asrc *asrc)
+{
+ struct device *dev = &asrc->pdev->dev;
+ int ret;
+
+ ret = v4l2_device_register(dev, &asrc->v4l2_dev);
+ if (ret) {
+ dev_err(dev, "failed to register v4l2 device\n");
+ goto err_register;
+ }
+
+ asrc->m2m_dev = v4l2_m2m_init(&fsl_asrc_m2m_ops);
+ if (IS_ERR(asrc->m2m_dev)) {
+ dev_err(dev, "failed to register v4l2 device\n");
+ ret = PTR_ERR(asrc->m2m_dev);
+ goto err_m2m;
+ }
+
+ asrc->dec_vdev = video_device_alloc();
+ if (!asrc->dec_vdev) {
+ dev_err(dev, "failed to register v4l2 device\n");
+ ret = -ENOMEM;
+ goto err_vdev_alloc;
+ }
+
+ mutex_init(&asrc->mlock);
+
+ asrc->dec_vdev->fops = &fsl_asrc_m2m_fops;
+ asrc->dec_vdev->ioctl_ops = &fsl_asrc_m2m_ioctl_ops;
+ asrc->dec_vdev->minor = -1;
+ asrc->dec_vdev->release = video_device_release;
+ asrc->dec_vdev->lock = &asrc->mlock; /* lock for ioctl serialization */
+ asrc->dec_vdev->v4l2_dev = &asrc->v4l2_dev;
+ asrc->dec_vdev->vfl_dir = VFL_DIR_M2M;
+ asrc->dec_vdev->device_caps = V4L2_CAP_AUDIO | V4L2_CAP_STREAMING;
+
+ ret = video_register_device(asrc->dec_vdev, VFL_TYPE_AUDIO, -1);
+ if (ret) {
+ dev_err(dev, "failed to register video device\n");
+ goto err_vdev_register;
+ }
+
+ video_set_drvdata(asrc->dec_vdev, asrc);
+
+ return 0;
+
+err_vdev_register:
+ video_device_release(asrc->dec_vdev);
+err_vdev_alloc:
+ v4l2_m2m_release(asrc->m2m_dev);
+err_m2m:
+ v4l2_device_unregister(&asrc->v4l2_dev);
+err_register:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(fsl_asrc_m2m_probe);
+
+int fsl_asrc_m2m_remove(struct platform_device *pdev)
+{
+ struct fsl_asrc *asrc = dev_get_drvdata(&pdev->dev);
+
+ video_unregister_device(asrc->dec_vdev);
+ video_device_release(asrc->dec_vdev);
+ v4l2_m2m_release(asrc->m2m_dev);
+ v4l2_device_unregister(&asrc->v4l2_dev);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fsl_asrc_m2m_remove);
+
+/* suspend callback for m2m */
+int fsl_asrc_m2m_suspend(struct fsl_asrc *asrc)
+{
+ struct fsl_asrc_pair *pair;
+ unsigned long lock_flags;
+ int i;
+
+ for (i = 0; i < PAIR_CTX_NUM; i++) {
+ spin_lock_irqsave(&asrc->lock, lock_flags);
+ pair = asrc->pair[i];
+ if (!pair || !pair->fh.vdev) {
+ spin_unlock_irqrestore(&asrc->lock, lock_flags);
+ continue;
+ }
+ if (!completion_done(&pair->complete[V4L_OUT])) {
+ if (pair->dma_chan[V4L_OUT])
+ dmaengine_terminate_all(pair->dma_chan[V4L_OUT]);
+ fsl_asrc_input_dma_callback((void *)pair);
+ }
+ if (!completion_done(&pair->complete[V4L_CAP])) {
+ if (pair->dma_chan[V4L_CAP])
+ dmaengine_terminate_all(pair->dma_chan[V4L_CAP]);
+ fsl_asrc_output_dma_callback((void *)pair);
+ }
+
+ if (asrc->m2m_pair_suspend)
+ asrc->m2m_pair_suspend(pair);
+
+ spin_unlock_irqrestore(&asrc->lock, lock_flags);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fsl_asrc_m2m_suspend);
+
+int fsl_asrc_m2m_resume(struct fsl_asrc *asrc)
+{
+ struct fsl_asrc_pair *pair;
+ unsigned long lock_flags;
+ int i;
+
+ for (i = 0; i < PAIR_CTX_NUM; i++) {
+ spin_lock_irqsave(&asrc->lock, lock_flags);
+ pair = asrc->pair[i];
+ if (!pair || !pair->fh.vdev) {
+ spin_unlock_irqrestore(&asrc->lock, lock_flags);
+ continue;
+ }
+ if (asrc->m2m_pair_resume)
+ asrc->m2m_pair_resume(pair);
+
+ spin_unlock_irqrestore(&asrc->lock, lock_flags);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fsl_asrc_m2m_resume);
+
+MODULE_DESCRIPTION("Freescale ASRC M2M driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/fsl/fsl_asrc_m2m.h b/sound/soc/fsl/fsl_asrc_m2m.h
new file mode 100644
index 000000000000..a5b91ed4d3b0
--- /dev/null
+++ b/sound/soc/fsl/fsl_asrc_m2m.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2019-2023 NXP
+ */
+
+#ifndef _FSL_ASRC_M2M_H
+#define _FSL_ASRC_M2M_H
+
+#include <linux/dma/imx-dma.h>
+#include "fsl_asrc_common.h"
+
+#define V4L_CAP OUT
+#define V4L_OUT IN
+
+#define ASRC_xPUT_DMA_CALLBACK(dir) \
+ (((dir) == V4L_OUT) ? fsl_asrc_input_dma_callback \
+ : fsl_asrc_output_dma_callback)
+
+#define DIR_STR(dir) (dir) == V4L_OUT ? "out" : "cap"
+
+#if IS_ENABLED(CONFIG_SND_SOC_FSL_ASRC_M2M)
+int fsl_asrc_m2m_probe(struct fsl_asrc *asrc);
+int fsl_asrc_m2m_remove(struct platform_device *pdev);
+int fsl_asrc_m2m_suspend(struct fsl_asrc *asrc);
+int fsl_asrc_m2m_resume(struct fsl_asrc *asrc);
+#else
+static inline int fsl_asrc_m2m_probe(struct fsl_asrc *asrc)
+{
+ return 0;
+}
+
+static inline int fsl_asrc_m2m_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static inline int fsl_asrc_m2m_suspend(struct fsl_asrc *asrc)
+{
+ return 0;
+}
+
+static inline int fsl_asrc_m2m_resume(struct fsl_asrc *asrc)
+{
+ return 0;
+}
+#endif
+
+#endif /* _FSL_EASRC_M2M_H */
--
2.34.1
Intergrate memory to memory feature to EASRC driver.
call m2m probe(), remove(), suspend() and resume()
in different callback.
Signed-off-by: Shengjiu Wang <[email protected]>
---
sound/soc/fsl/fsl_easrc.c | 41 +++++++++++++++++++++++++++++++++++++--
1 file changed, 39 insertions(+), 2 deletions(-)
diff --git a/sound/soc/fsl/fsl_easrc.c b/sound/soc/fsl/fsl_easrc.c
index b735b24badc2..bc5404627032 100644
--- a/sound/soc/fsl/fsl_easrc.c
+++ b/sound/soc/fsl/fsl_easrc.c
@@ -29,6 +29,7 @@
#include <sound/core.h>
#include "fsl_easrc.h"
+#include "fsl_asrc_m2m.h"
#include "imx-pcm.h"
#define FSL_EASRC_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
@@ -2190,11 +2191,21 @@ static int fsl_easrc_probe(struct platform_device *pdev)
return ret;
}
+ /* probe the m2m feature */
+ ret = fsl_asrc_m2m_probe(easrc);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to init m2m device %d\n", ret);
+ return ret;
+ }
+
return 0;
}
static void fsl_easrc_remove(struct platform_device *pdev)
{
+ /* remove the m2m feature */
+ fsl_asrc_m2m_remove(pdev);
+
pm_runtime_disable(&pdev->dev);
}
@@ -2295,12 +2306,38 @@ static __maybe_unused int fsl_easrc_runtime_resume(struct device *dev)
return ret;
}
+static int __maybe_unused fsl_easrc_suspend(struct device *dev)
+{
+ struct fsl_asrc *easrc = dev_get_drvdata(dev);
+ int ret;
+
+ /* suspend m2m function first */
+ fsl_asrc_m2m_suspend(easrc);
+
+ ret = pm_runtime_force_suspend(dev);
+
+ return ret;
+}
+
+static int __maybe_unused fsl_easrc_resume(struct device *dev)
+{
+ struct fsl_asrc *easrc = dev_get_drvdata(dev);
+ int ret;
+
+ ret = pm_runtime_force_resume(dev);
+
+ /* resume m2m function */
+ fsl_asrc_m2m_resume(easrc);
+
+ return ret;
+}
+
static const struct dev_pm_ops fsl_easrc_pm_ops = {
SET_RUNTIME_PM_OPS(fsl_easrc_runtime_suspend,
fsl_easrc_runtime_resume,
NULL)
- SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
- pm_runtime_force_resume)
+ SET_SYSTEM_SLEEP_PM_OPS(fsl_easrc_suspend,
+ fsl_easrc_resume)
};
static struct platform_driver fsl_easrc_driver = {
--
2.34.1
On Thu, Jun 29, 2023 at 09:37:51AM +0800, Shengjiu Wang wrote:
> Implement the ASRC memory to memory function using
> the v4l2 framework, user can use this function with
> v4l2 ioctl interface.
>
> User send the output and capture buffer to driver and
> driver store the converted data to the capture buffer.
>
> This feature can be shared by ASRC and EASRC drivers
>
> Signed-off-by: Shengjiu Wang <[email protected]>
> ---
> sound/soc/fsl/Kconfig | 13 +
> sound/soc/fsl/Makefile | 2 +
> sound/soc/fsl/fsl_asrc_m2m.c | 878 +++++++++++++++++++++++++++++++++++
> sound/soc/fsl/fsl_asrc_m2m.h | 48 ++
This feels like the bit where we interface v4l to ASoC should be a
separate library, there shouldn't be anything device specific about
getting an audio stream into a block of memory. I'm thinking something
like the way we handle dmaengine here.
I've not dug into the code yet though.
On Fri, Jun 30, 2023 at 11:37:29AM +0800, Shengjiu Wang wrote:
> On Thu, Jun 29, 2023 at 7:39 PM Mark Brown <[email protected]> wrote:
> > On Thu, Jun 29, 2023 at 09:37:51AM +0800, Shengjiu Wang wrote:
> > > Implement the ASRC memory to memory function using
> > > the v4l2 framework, user can use this function with
> > > v4l2 ioctl interface.
> > This feels like the bit where we interface v4l to ASoC should be a
> > separate library, there shouldn't be anything device specific about
> > getting an audio stream into a block of memory. I'm thinking something
> > like the way we handle dmaengine here.
> > I've not dug into the code yet though.
> Users may want to get the ASRC output in the user space, then
> do mixing with other streams before sending to ALSA.
> As there is no such API in ASoC, the best interface I found is
> the V4L2, but I need to do a little modification of the V4L2 API,
> extend it for audio usage.
> Could you please suggest more about the "separate library"?
> Should I place this "sound/soc/fsl/fsl_asrc_m2m.c" in another folder?
The concept of connecting an audio stream from v4l directly to something
in ASoC isn't specific to this driver or even to the i.MX platform, the
code that deals with that part of things should be split out so that it
works the same for any other drivers that do this.