ALSA: pcm - Use pgprot_noncached() for MIPS non-coherent archs
MIPS non-coherent archs need the noncached pgprot in mmap of PCM buffers. But, since the coherency needs to be checked dynamically via plat_device_is_coherent(), we need an ugly check dependent on MIPS in ALSA core code. This should be cleaned up in MIPS arch side (e.g. creating dma_mmap_coherent()) in near future. Tested-by: Wu Zhangjin <wuzhangjin@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
parent
6a45f78225
commit
9fe17b5d47
|
@ -36,6 +36,9 @@
|
|||
#include <sound/timer.h>
|
||||
#include <sound/minors.h>
|
||||
#include <asm/io.h>
|
||||
#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
|
||||
#include <dma-coherence.h>
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Compatibility
|
||||
|
@ -3184,6 +3187,10 @@ static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
|
|||
substream->runtime->dma_area,
|
||||
substream->runtime->dma_addr,
|
||||
area->vm_end - area->vm_start);
|
||||
#elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
|
||||
if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
|
||||
!plat_device_is_coherent(substream->dma_buffer.dev.dev))
|
||||
area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
|
||||
#endif /* ARCH_HAS_DMA_MMAP_COHERENT */
|
||||
/* mmap with fault handler */
|
||||
area->vm_ops = &snd_pcm_vm_ops_data_fault;
|
||||
|
|
Loading…
Reference in a new issue