ASoC: ti: davinci-mcasp: Add support for platforms using UDMA

k3 devices including am654 and j721e are using UDMA
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200210140950.11090-3-peter.ujfalusi@ti.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/ti/Kconfig

 # SPDX-License-Identifier: GPL-2.0-only
 menu "Audio support for Texas Instruments SoCs"
-depends on DMA_OMAP || TI_EDMA || COMPILE_TEST
+depends on DMA_OMAP || TI_EDMA || TI_K3_UDMA || COMPILE_TEST
 
 config SND_SOC_TI_EDMA_PCM
 	tristate
@@ -28,6 +28,7 @@ config SND_SOC_DAVINCI_MCASP
 	tristate "Multichannel Audio Serial Port (McASP) support"
 	select SND_SOC_TI_EDMA_PCM
 	select SND_SOC_TI_SDMA_PCM
+	select SND_SOC_TI_UDMA_PCM
 	help
 	  Say Y or M here if you want to have support for McASP IP found in
 	  various Texas Instruments SoCs like:
@@ -35,6 +36,7 @@ config SND_SOC_DAVINCI_MCASP
 	  - Sitara line of SoCs (AM335x, AM438x, etc)
 	  - DRA7x devices
 	  - Keystone devices
+	  - K3 devices (am654, j721e)
 
 config SND_SOC_DAVINCI_VCIF
 	tristate "daVinci Voice Interface (VCIF) support"

sound/soc/ti/davinci-mcasp.c

@@ -38,6 +38,7 @@
 
 #include "edma-pcm.h"
 #include "sdma-pcm.h"
+#include "udma-pcm.h"
 #include "davinci-mcasp.h"
 
 #define MCASP_MAX_AFIFO_DEPTH	64
@@ -1875,6 +1876,7 @@ static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of(
 enum {
 	PCM_EDMA,
 	PCM_SDMA,
+	PCM_UDMA,
 };
 static const char *sdma_prefix = "ti,omap";
 
@@ -1912,6 +1914,8 @@ static int davinci_mcasp_get_dma_type(struct davinci_mcasp *mcasp)
 	dev_dbg(mcasp->dev, "DMA controller compatible = \"%s\"\n", tmp);
 	if (!strncmp(tmp, sdma_prefix, strlen(sdma_prefix)))
 		return PCM_SDMA;
+	else if (strstr(tmp, "udmap"))
+		return PCM_UDMA;
 
 	return PCM_EDMA;
 }
@@ -2371,6 +2375,9 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
 	case PCM_SDMA:
 		ret = sdma_pcm_platform_register(&pdev->dev, "tx", "rx");
 		break;
+	case PCM_UDMA:
+		ret = udma_pcm_platform_register(&pdev->dev);
+		break;
 	default:
 		dev_err(&pdev->dev, "No DMA controller found (%d)\n", ret);
 	case -EPROBE_DEFER: