Hi Christoph,
Thank you for the patch.
On Tue, Jul 30, 2019 at 09:18:49AM +0300, Christoph Hellwig wrote:
> We can already use DMA_ATTR_WRITE_COMBINE or the _wc prefixed version,
> so remove the third way of doing things.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
> drivers/gpu/drm/omapdrm/dss/dispc.c | 11 +++++------
> include/linux/dma-mapping.h | 9 ---------
> 2 files changed, 5 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c
> index 785c5546067a..c70f3246a552 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dispc.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
> @@ -4609,11 +4609,10 @@ static int dispc_errata_i734_wa_init(struct dispc_device *dispc)
> i734_buf.size = i734.ovli.width * i734.ovli.height *
> color_mode_to_bpp(i734.ovli.fourcc) / 8;
>
> - i734_buf.vaddr = dma_alloc_writecombine(&dispc->pdev->dev,
> - i734_buf.size, &i734_buf.paddr,
> - GFP_KERNEL);
> + i734_buf.vaddr = dma_alloc_wc(&dispc->pdev->dev, i734_buf.size,
> + &i734_buf.paddr, GFP_KERNEL);
I would have indented this line to match the rest. Apart from that,
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> if (!i734_buf.vaddr) {
> - dev_err(&dispc->pdev->dev, "%s: dma_alloc_writecombine failed\n",
> + dev_err(&dispc->pdev->dev, "%s: dma_alloc_wc failed\n",
> __func__);
> return -ENOMEM;
> }
> @@ -4626,8 +4625,8 @@ static void dispc_errata_i734_wa_fini(struct dispc_device *dispc)
> if (!dispc->feat->has_gamma_i734_bug)
> return;
>
> - dma_free_writecombine(&dispc->pdev->dev, i734_buf.size, i734_buf.vaddr,
> - i734_buf.paddr);
> + dma_free_wc(&dispc->pdev->dev, i734_buf.size, i734_buf.vaddr,
> + i734_buf.paddr);
> }
>
> static void dispc_errata_i734_wa(struct dispc_device *dispc)
> diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
> index f7d1eea32c78..633dae466097 100644
> --- a/include/linux/dma-mapping.h
> +++ b/include/linux/dma-mapping.h
> @@ -786,9 +786,6 @@ static inline void *dma_alloc_wc(struct device *dev, size_t size,
>
> return dma_alloc_attrs(dev, size, dma_addr, gfp, attrs);
> }
> -#ifndef dma_alloc_writecombine
> -#define dma_alloc_writecombine dma_alloc_wc
> -#endif
>
> static inline void dma_free_wc(struct device *dev, size_t size,
> void *cpu_addr, dma_addr_t dma_addr)
> @@ -796,9 +793,6 @@ static inline void dma_free_wc(struct device *dev, size_t size,
> return dma_free_attrs(dev, size, cpu_addr, dma_addr,
> DMA_ATTR_WRITE_COMBINE);
> }
> -#ifndef dma_free_writecombine
> -#define dma_free_writecombine dma_free_wc
> -#endif
>
> static inline int dma_mmap_wc(struct device *dev,
> struct vm_area_struct *vma,
> @@ -808,9 +802,6 @@ static inline int dma_mmap_wc(struct device *dev,
> return dma_mmap_attrs(dev, vma, cpu_addr, dma_addr, size,
> DMA_ATTR_WRITE_COMBINE);
> }
> -#ifndef dma_mmap_writecombine
> -#define dma_mmap_writecombine dma_mmap_wc
> -#endif
>
> #ifdef CONFIG_NEED_DMA_MAP_STATE
> #define DEFINE_DMA_UNMAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME
--
Regards,
Laurent Pinchart
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