Re: [alsa-devel] [PATCH v2 4/4] fbdev: sh_mobile_lcdc: use dma_mmap_coherent if available

Hi Eiraku-san,

On Thursday 26 July 2012 20:13:11 Hideki EIRAKU wrote:

fb_mmap() implemented in fbmem.c uses smem_start as the physical address of the frame buffer. In the sh_mobile_lcdc driver, the smem_start is a dma_addr_t that is not a physical address when IOMMU is enabled. dma_mmap_coherent() maps the address correctly. It is available on ARM platforms.

Signed-off-by: Hideki EIRAKU hdk@igel.co.jp

Acked-by: Laurent Pinchart laurent.pinchart@ideasonboard.com