diff options
author | b02247 <b02247@freescale.com> | 2012-05-09 17:30:41 +0800 |
---|---|---|
committer | Eric Nelson <eric.nelson@boundarydevices.com> | 2013-07-05 13:01:15 -0700 |
commit | fbe0e429ff069a4c3317ba27d2e2da6efa1736a6 (patch) | |
tree | 28ea6457f67c5179ceb3b73134d036852d7f3782 /arch/arm/mm/dma-mapping.c | |
parent | 5b1b2dd62690572afc5d806078c0fba6c735637d (diff) |
ENGR00181680-1 No audio when play 3 streams after 3~10 seconds sometimes
sdma: bd is bufferable dma buffer, interrupt handler can not get correct
data after sdma script updated. Which will cause there is no interrupt
after failed period number times in the interrupt handler.
This is a workaround.
Signed-off-by: b02247 <b02247@freescale.com>
Diffstat (limited to 'arch/arm/mm/dma-mapping.c')
-rw-r--r-- | arch/arm/mm/dma-mapping.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 0f0baddf4eb9..feb83cb5e993 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -333,6 +333,23 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, * virtual and bus address for that space. */ void * +dma_alloc_noncached(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp) +{ + void *memory; + + if (dma_alloc_from_coherent(dev, size, handle, &memory)) + return memory; + + return __dma_alloc(dev, size, handle, gfp, + pgprot_noncached(pgprot_kernel)); +} +EXPORT_SYMBOL(dma_alloc_noncached); + +/* + * Allocate DMA-coherent memory space and return both the kernel remapped + * virtual and bus address for that space. + */ +void * dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp) { void *memory; |