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
---
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 ..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
+#include
+#include
+#include
+#include
+#include
+#include
+#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 */
+
