Hi Eiraku-san,
On Monday 06 August 2012 18:55:24 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@xxxxxxxxxx>
Acked-by: Hideki EIRAKU <hdk@xxxxxxxxxx>
As this patch doesn't depend on any other patch in your series
(ARCH_HAS_DMA_MMAP_COHERENT will not be defined without 1/4, so this patch
will be a no-op until then), I've applied it to my tree and will push it to
avoid merge conflicts, unless you would prefer to push it yourself.
> ---
> drivers/video/sh_mobile_lcdcfb.c | 28 ++++++++++++++++++++++++++++
> 1 files changed, 28 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/video/sh_mobile_lcdcfb.c
> b/drivers/video/sh_mobile_lcdcfb.c index 8cb653b..c8cba7a 100644
> --- a/drivers/video/sh_mobile_lcdcfb.c
> +++ b/drivers/video/sh_mobile_lcdcfb.c
> @@ -1614,6 +1614,17 @@ static int sh_mobile_lcdc_overlay_blank(int blank,
> struct fb_info *info) return 1;
> }
>
> +#ifdef ARCH_HAS_DMA_MMAP_COHERENT
> +static int
> +sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct
> *vma) +{
> + struct sh_mobile_lcdc_overlay *ovl = info->par;
> +
> + return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
> + ovl->dma_handle, ovl->fb_size);
> +}
> +#endif
> +
> static struct fb_ops sh_mobile_lcdc_overlay_ops = {
> .owner = THIS_MODULE,
> .fb_read = fb_sys_read,
> @@ -1626,6 +1637,9 @@ static struct fb_ops sh_mobile_lcdc_overlay_ops = {
> .fb_ioctl = sh_mobile_lcdc_overlay_ioctl,
> .fb_check_var = sh_mobile_lcdc_overlay_check_var,
> .fb_set_par = sh_mobile_lcdc_overlay_set_par,
> +#ifdef ARCH_HAS_DMA_MMAP_COHERENT
> + .fb_mmap = sh_mobile_lcdc_overlay_mmap,
> +#endif
> };
>
> static void
> @@ -2093,6 +2107,17 @@ static int sh_mobile_lcdc_blank(int blank, struct
> fb_info *info) return 0;
> }
>
> +#ifdef ARCH_HAS_DMA_MMAP_COHERENT
> +static int
> +sh_mobile_lcdc_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,
> @@ -2108,6 +2133,9 @@ static struct fb_ops sh_mobile_lcdc_ops = {
> .fb_release = sh_mobile_lcdc_release,
> .fb_check_var = sh_mobile_lcdc_check_var,
> .fb_set_par = sh_mobile_lcdc_set_par,
> +#ifdef ARCH_HAS_DMA_MMAP_COHERENT
> + .fb_mmap = sh_mobile_lcdc_mmap,
> +#endif
> };
>
> static void
--
Regards,
Laurent Pinchart
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