Subject: [PATCH] Fix PXA2xx sound DMA autoincrementation flags

From: [email-masked] (Petr Cvek)
Date: Sun, 23 Nov 2014 08:04:51 +0100

Fix for address auto-incrementation flags for DMA transmissions for 
PXA2xx sound.

Old version used playback settings for recording, so it wrongly read 
from whole register space (instead of one FIFO register) and wrote into 
single word in memory.

Signed-off-by: Petr Cvek <[email-masked]>
---
  sound/arm/pxa2xx-pcm-lib.c | 8 +++++++-
  1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sound/arm/pxa2xx-pcm-lib.c b/sound/arm/pxa2xx-pcm-lib.c
index a61d7a9..5d3a415 100644
--- a/sound/arm/pxa2xx-pcm-lib.c
+++ b/sound/arm/pxa2xx-pcm-lib.c
@@ -45,7 +45,13 @@ int __pxa2xx_pcm_hw_params(struct snd_pcm_substream 
*substream,
      size_t period = params_period_bytes(params);
      pxa_dma_desc *dma_desc;
      dma_addr_t dma_buff_phys, next_desc_phys;
-    u32 dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG;
+    u32 dcmd = 0;
+
+    if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+        dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG;
+    } else {
+        dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC;
+    }

      /* temporary transition hack */
      switch (rtd->params->addr_width) {
-- 
1.7.12.1