Commit 9fe17b5d authored by Takashi Iwai's avatar Takashi Iwai

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: default avatarWu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 6a45f782
......@@ -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;
......
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