Messages in this thread Patch in this message | | | From | Hideki EIRAKU <> | Subject | [PATCH 3/3] fbdev: sh_mobile_lcdc: use dma_mmap_coherent if available | Date | Wed, 25 Jul 2012 15:29:24 +0900 |
| |
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> --- drivers/video/sh_mobile_lcdcfb.c | 14 ++++++++++++++ 1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c index e672698..65732c4 100644 --- a/drivers/video/sh_mobile_lcdcfb.c +++ b/drivers/video/sh_mobile_lcdcfb.c @@ -1393,6 +1393,17 @@ static int sh_mobile_lcdc_blank(int blank, struct fb_info *info) return 0; } +#ifdef ARCH_HAS_DMA_MMAP_COHERENT +static int +sh_mobile_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) +{ + struct sh_mobile_lcdc_chan *ch = info->par; + + return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem, + ch->dma_handle, ch->fb_size); +} +#endif + static struct fb_ops sh_mobile_lcdc_ops = { .owner = THIS_MODULE, .fb_setcolreg = sh_mobile_lcdc_setcolreg, @@ -1408,6 +1419,9 @@ static struct fb_ops sh_mobile_lcdc_ops = { .fb_release = sh_mobile_release, .fb_check_var = sh_mobile_check_var, .fb_set_par = sh_mobile_set_par, +#ifdef ARCH_HAS_DMA_MMAP_COHERENT + .fb_mmap = sh_mobile_fb_mmap, +#endif }; static void -- 1.7.0.4
| |