ASoC: fsl_asrc_m2m: Add memory to memory function

Implement the ASRC memory to memory function using
the compress framework, user can use this function with
compress ioctl interface.

This feature can be shared by ASRC and EASRC drivers

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Jaroslav Kysela <perex@perex.cz>
Link: https://patch.msgid.link/20241212074509.3445859-5-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/Kconfig

@@ -8,6 +8,8 @@ config SND_SOC_FSL_ASRC
 	depends on HAS_DMA
 	select REGMAP_MMIO
 	select SND_SOC_GENERIC_DMAENGINE_PCM
+	select SND_COMPRESS_ACCEL
+	select SND_COMPRESS_OFFLOAD
 	help
 	  Say Y if you want to add Asynchronous Sample Rate Converter (ASRC)
 	  support for the Freescale CPUs.

sound/soc/fsl/Makefile

@@ -10,7 +10,7 @@ obj-$(CONFIG_SND_SOC_P1022_RDK) += snd-soc-p1022-rdk.o
 # Freescale SSI/DMA/SAI/SPDIF Support
 snd-soc-fsl-audmix-y := fsl_audmix.o
 snd-soc-fsl-asoc-card-y := fsl-asoc-card.o
-snd-soc-fsl-asrc-y := fsl_asrc.o fsl_asrc_dma.o
+snd-soc-fsl-asrc-y := fsl_asrc.o fsl_asrc_dma.o fsl_asrc_m2m.o
 snd-soc-fsl-lpc3xxx-y := lpc3xxx-pcm.o lpc3xxx-i2s.o
 snd-soc-fsl-sai-y := fsl_sai.o
 snd-soc-fsl-ssi-y := fsl_ssi.o

sound/soc/fsl/fsl_asrc_common.h

@@ -60,6 +60,7 @@ struct fsl_asrc_m2m_cap {
  * @buf_len: buffer length of m2m
  * @dma_buffer: buffer pointers
  * @first_convert: start of conversion
+ * @ratio_mod_flag: flag for new ratio modifier
  * @ratio_mod: ratio modification
  */
 struct fsl_asrc_pair {
@@ -84,6 +85,7 @@ struct fsl_asrc_pair {
 	unsigned int buf_len[2];
 	struct snd_dma_buffer dma_buffer[2];
 	unsigned int first_convert;
+	bool ratio_mod_flag;
 	unsigned int ratio_mod;
 };
 
@@ -98,6 +100,7 @@ struct fsl_asrc_pair {
  * @mem_clk: clock source to access register
  * @ipg_clk: clock source to drive peripheral
  * @spba_clk: SPBA clock (optional, depending on SoC design)
+ * @card: compress sound card
  * @lock: spin lock for resource protection
  * @pair: pair pointers
  * @channel_avail: non-occupied channel numbers
@@ -131,6 +134,7 @@ struct fsl_asrc {
 	struct clk *mem_clk;
 	struct clk *ipg_clk;
 	struct clk *spba_clk;
+	struct snd_card *card;
 	spinlock_t lock;      /* spin lock for resource protection */
 
 	struct fsl_asrc_pair *pair[PAIR_CTX_NUM];
@@ -166,4 +170,9 @@ struct fsl_asrc {
 #define DRV_NAME "fsl-asrc-dai"
 extern struct snd_soc_component_driver fsl_asrc_component;
 
+int fsl_asrc_m2m_init(struct fsl_asrc *asrc);
+void fsl_asrc_m2m_exit(struct fsl_asrc *asrc);
+int fsl_asrc_m2m_resume(struct fsl_asrc *asrc);
+int fsl_asrc_m2m_suspend(struct fsl_asrc *asrc);
+
 #endif /* _FSL_ASRC_COMMON_H */