ASoC: samsung: pass DMA channels as pointers

ARM64 allmodconfig produces a bunch of warnings when building the
samsung ASoC code:

sound/soc/samsung/dmaengine.c: In function 'samsung_asoc_init_dma_data':
sound/soc/samsung/dmaengine.c:53:32: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
   playback_data->filter_data = (void *)playback->channel;
sound/soc/samsung/dmaengine.c:60:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
   capture_data->filter_data = (void *)capture->channel;

We could easily shut up the warning by adding an intermediate cast,
but there is a bigger underlying problem: The use of IORESOURCE_DMA
to pass data from platform code to device drivers is dubious to start
with, as what we really want is a pointer that can be passed into
a filter function.

Note that on s3c64xx, the pl08x DMA data is already a pointer, but
gets cast to resource_size_t so we can pass it as a resource, and it
then gets converted back to a pointer. In contrast, the data we pass
for s3c24xx is an index into a device specific table, and we artificially
convert that into a pointer for the filter function.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 5 insertions, 21 deletions

diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index ea4ab374a223..0945b5de39e7 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -1257,27 +1257,14 @@ static int samsung_i2s_probe(struct platform_device *pdev)
 	pri_dai->lock = &pri_dai->spinlock;
 
 	if (!np) {
-		res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
-		if (!res) {
-			dev_err(&pdev->dev,
-				"Unable to get I2S-TX dma resource\n");
-			return -ENXIO;
-		}
-		pri_dai->dma_playback.channel = res->start;
-
-		res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
-		if (!res) {
-			dev_err(&pdev->dev,
-				"Unable to get I2S-RX dma resource\n");
-			return -ENXIO;
-		}
-		pri_dai->dma_capture.channel = res->start;
-
 		if (i2s_pdata == NULL) {
 			dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
 			return -EINVAL;
 		}
 
+		pri_dai->dma_playback.slave = i2s_pdata->dma_playback;
+		pri_dai->dma_capture.slave = i2s_pdata->dma_capture;
+
 		if (&i2s_pdata->type)
 			i2s_cfg = &i2s_pdata->type.i2s;
 
@@ -1338,11 +1325,8 @@ static int samsung_i2s_probe(struct platform_device *pdev)
 		sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
 		sec_dai->dma_playback.ch_name = "tx-sec";
 
-		if (!np) {
-			res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
-			if (res)
-				sec_dai->dma_playback.channel = res->start;
-		}
+		if (!np)
+			sec_dai->dma_playback.slave = i2s_pdata->dma_play_sec;
 
 		sec_dai->dma_playback.dma_size = 4;
 		sec_dai->addr = pri_dai->addr;