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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2017-04-21 00:33:58 +0300 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2017-06-02 10:57:08 +0300 |
| commit | 97817fd46518aa2f457ce41f6a9aecd36b461426 (patch) | |
| tree | 5c5daa64ada96ac4be65b2e190168935d61eb973 /drivers/gpu/drm/omapdrm/omap_gem.c | |
| parent | 930dc19c0b7278c26c85f05f92cb417f2bd28aa3 (diff) | |
| download | linux-97817fd46518aa2f457ce41f6a9aecd36b461426.tar.xz | |
drm: omapdrm: Map pages for DMA in DMA_TO_DEVICE direction
The display engine only reads from memory, there's no need to use
bidirectional DMA mappings. Use DMA_TO_DEVICE instead.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/gpu/drm/omapdrm/omap_gem.c')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_gem.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c index 94aef52c36ad..461fbb5c0075 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem.c +++ b/drivers/gpu/drm/omapdrm/omap_gem.c @@ -254,7 +254,7 @@ static int omap_gem_attach_pages(struct drm_gem_object *obj) for (i = 0; i < npages; i++) { addrs[i] = dma_map_page(dev->dev, pages[i], - 0, PAGE_SIZE, DMA_BIDIRECTIONAL); + 0, PAGE_SIZE, DMA_TO_DEVICE); if (dma_mapping_error(dev->dev, addrs[i])) { dev_warn(dev->dev, @@ -262,7 +262,7 @@ static int omap_gem_attach_pages(struct drm_gem_object *obj) for (i = i - 1; i >= 0; --i) { dma_unmap_page(dev->dev, addrs[i], - PAGE_SIZE, DMA_BIDIRECTIONAL); + PAGE_SIZE, DMA_TO_DEVICE); } ret = -ENOMEM; @@ -322,7 +322,7 @@ static void omap_gem_detach_pages(struct drm_gem_object *obj) for (i = 0; i < npages; i++) { if (omap_obj->dma_addrs[i]) dma_unmap_page(obj->dev->dev, omap_obj->dma_addrs[i], - PAGE_SIZE, DMA_BIDIRECTIONAL); + PAGE_SIZE, DMA_TO_DEVICE); } kfree(omap_obj->dma_addrs); @@ -744,7 +744,7 @@ void omap_gem_cpu_sync_page(struct drm_gem_object *obj, int pgoff) if (omap_obj->dma_addrs[pgoff]) { dma_unmap_page(dev->dev, omap_obj->dma_addrs[pgoff], - PAGE_SIZE, DMA_BIDIRECTIONAL); + PAGE_SIZE, DMA_TO_DEVICE); omap_obj->dma_addrs[pgoff] = 0; } } @@ -767,8 +767,7 @@ void omap_gem_dma_sync_buffer(struct drm_gem_object *obj, dma_addr_t addr; addr = dma_map_page(dev->dev, pages[i], 0, - PAGE_SIZE, DMA_BIDIRECTIONAL); - + PAGE_SIZE, dir); if (dma_mapping_error(dev->dev, addr)) { dev_warn(dev->dev, "%s: failed to map page\n", __func__); |