ASoC: fsl_micfil: add multi fifo support

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 <s.hauer@pengutronix.de>
Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Link: https://lore.kernel.org/r/20220414162249.3934543-13-s.hauer@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/fsl/fsl_micfil.c b/sound/soc/fsl/fsl_micfil.c
index 4656a18..56df916 100644 (file)
--- 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;