The fsl_sai driver calculates the number of pins used and enables
multiple channels if necessary. This means the SAI expects data in
one FIFO per pin. The SDMA engine only services a single FIFO, so
multi pin support doesn't work at all.
This patch enables the software combine mode in chips that support
it. With this the SAI presents only a single FIFO to the outside
and distributes the data into the different FIFOs internally.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
sound/soc/fsl/fsl_sai.c | 9 +++++++++
sound/soc/fsl/fsl_sai.h | 1 +
2 files changed, 10 insertions(+)
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index 10544fa27dc0..cab015d96889 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -517,6 +517,10 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
FSL_SAI_CR5_FBT_MASK, val_cr5);
}
+ if (sai->soc_data->pins > 1)
+ regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
+ FSL_SAI_CR4_FCOMB_MASK, FSL_SAI_CR4_FCOMB_SOFT);
+
regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx, ofs),
FSL_SAI_CR3_TRCE_MASK,
FSL_SAI_CR3_TRCE((1 << pins) - 1));
@@ -1195,6 +1199,7 @@ static const struct fsl_sai_soc_data fsl_sai_vf610_data = {
.use_imx_pcm = false,
.use_edma = false,
.fifo_depth = 32,
+ .pins = 1,
.reg_offset = 0,
.mclk0_is_mclk1 = false,
.flags = 0,
@@ -1204,6 +1209,7 @@ static const struct fsl_sai_soc_data fsl_sai_imx6sx_data = {
.use_imx_pcm = true,
.use_edma = false,
.fifo_depth = 32,
+ .pins = 1,
.reg_offset = 0,
.mclk0_is_mclk1 = true,
.flags = 0,
@@ -1213,6 +1219,7 @@ static const struct fsl_sai_soc_data fsl_sai_imx7ulp_data = {
.use_imx_pcm = true,
.use_edma = false,
.fifo_depth = 16,
+ .pins = 2,
.reg_offset = 8,
.mclk0_is_mclk1 = false,
.flags = PMQOS_CPU_LATENCY,
@@ -1222,6 +1229,7 @@ static const struct fsl_sai_soc_data fsl_sai_imx8mq_data = {
.use_imx_pcm = true,
.use_edma = false,
.fifo_depth = 128,
+ .pins = 8,
.reg_offset = 8,
.mclk0_is_mclk1 = false,
.flags = 0,
@@ -1231,6 +1239,7 @@ static const struct fsl_sai_soc_data fsl_sai_imx8qm_data = {
.use_imx_pcm = true,
.use_edma = true,
.fifo_depth = 64,
+ .pins = 1,
.reg_offset = 0,
.mclk0_is_mclk1 = false,
.flags = 0,
diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h
index 9aaf231bc024..410f6e6a9137 100644
--- a/sound/soc/fsl/fsl_sai.h
+++ b/sound/soc/fsl/fsl_sai.h
@@ -223,6 +223,7 @@ struct fsl_sai_soc_data {
bool use_edma;
bool mclk0_is_mclk1;
unsigned int fifo_depth;
+ unsigned int pins;
unsigned int reg_offset;
unsigned int flags;
};
--
2.30.2
