[v6,12/21] ASoC: fsl_micfil: add multi fifo support

Commit Message

Sascha Hauer April 14, 2022, 4:22 p.m. UTC

The micfil hardware provides the microphone data on multiple successive
FIFO registers, one register per stereo pair. Also to work properly the
SDMA_DONE0_CONFIG_DONE_SEL bit in the SDMA engines SDMA_DONE0_CONFIG
register must be set. This patch provides the necessary information to
the SDMA engine driver.

Signed-off-by: Sascha Hauer <[e-mail]>
Acked-by: Shengjiu Wang <[e-mail]>
---

Notes:
    Changes since v3:
    - Fix include name
    
    Changes since v2:
    - Add forgotten commit message

 sound/soc/fsl/fsl_micfil.c | 6 ++++++
 1 file changed, 6 insertions(+)

Patch

diff --git a/sound/soc/fsl/fsl_micfil.c b/sound/soc/fsl/fsl_micfil.c
index 4656a18a03e45..56df916ad55f2 100644
--- a/sound/soc/fsl/fsl_micfil.c
+++ b/sound/soc/fsl/fsl_micfil.c
@@ -16,6 +16,7 @@ 
 #include <linux/regmap.h>
 #include <linux/sysfs.h>
 #include <linux/types.h>
+#include <linux/dma/imx-dma.h>
 #include <sound/dmaengine_pcm.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>
@@ -35,6 +36,7 @@  struct fsl_micfil {
 	struct clk *busclk;
 	struct clk *mclk;
 	struct snd_dmaengine_dai_dma_data dma_params_rx;
+	struct sdma_peripheral_config sdmacfg;
 	unsigned int dataline;
 	char name[32];
 	int irq[MICFIL_IRQ_LINES];
@@ -324,6 +326,10 @@  static int fsl_micfil_hw_params(struct snd_pcm_substream *substream,
 		return ret;
 	}
 
+	micfil->dma_params_rx.peripheral_config = &micfil->sdmacfg;
+	micfil->dma_params_rx.peripheral_size = sizeof(micfil->sdmacfg);
+	micfil->sdmacfg.n_fifos_src = channels;
+	micfil->sdmacfg.sw_done = true;
 	micfil->dma_params_rx.maxburst = channels * MICFIL_DMA_MAXBURST_RX;
 
 	return 0;