Merge pull request #193 from kakulesza/fix-hda-dma-config-dgmbs-align-bits

hda-dma fix: align DGMBS value to 32 bytes

Author: lgirdwood

src/drivers/hda-dma.c

@@ -44,7 +44,9 @@
 #include <sof/ipc.h>
 #include <sof/pm_runtime.h>
 #include <sof/wait.h>
+#include <sof/audio/format.h>
 #include <platform/dma.h>
+#include <platform/platform.h>
 #include <arch/cache.h>
 #include <uapi/ipc.h>
 
@@ -367,7 +369,8 @@ static int hda_dma_set_config(struct dma *dma, int channel,
 	host_dma_reg_write(dma, channel, DGBS,  buffer_bytes);
 	host_dma_reg_write(dma, channel, DGBFPI,  0);
 	host_dma_reg_write(dma, channel, DGBSP,  period_bytes);
-	host_dma_reg_write(dma, channel, DGMBS,  period_bytes);
+	host_dma_reg_write(dma, channel, DGMBS,
+			ALIGN_UP(period_bytes, PLATFORM_HDA_BUFFER_ALIGNMENT));
 	host_dma_reg_write(dma, channel, DGLLPI,  0);
 	host_dma_reg_write(dma, channel, DGLPIBI,  0);
 

src/platform/apollolake/include/platform/platform.h

@@ -41,6 +41,9 @@
 
 struct sof;
 
+/* DGMBS align value */
+#define PLATFORM_HDA_BUFFER_ALIGNMENT	0x20
+
 /* Host page size */
 #define HOST_PAGE_SIZE		4096
 #define PLATFORM_PAGE_TABLE_SIZE	256

src/platform/cannonlake/include/platform/platform.h

@@ -47,6 +47,9 @@ struct sof;
 #define PLATFORM_SSP_COUNT 3
 #define MAX_GPDMA_COUNT 2
 
+/* DGMBS align value */
+#define PLATFORM_HDA_BUFFER_ALIGNMENT	0x20
+
 /* Host page size */
 #define HOST_PAGE_SIZE		4096
 #define PLATFORM_PAGE_TABLE_SIZE	256