diff options
| -rw-r--r-- | drivers/media/platform/vsp1/vsp1_drm.c | 24 | ||||
| -rw-r--r-- | include/media/vsp1.h | 3 |
2 files changed, 27 insertions, 0 deletions
diff --git a/drivers/media/platform/vsp1/vsp1_drm.c b/drivers/media/platform/vsp1/vsp1_drm.c index 84d0418660bf..9377aafa8996 100644 --- a/drivers/media/platform/vsp1/vsp1_drm.c +++ b/drivers/media/platform/vsp1/vsp1_drm.c @@ -12,6 +12,7 @@ */ #include <linux/device.h> +#include <linux/dma-mapping.h> #include <linux/slab.h> #include <media/media-entity.h> @@ -540,6 +541,29 @@ void vsp1_du_atomic_flush(struct device *dev) } EXPORT_SYMBOL_GPL(vsp1_du_atomic_flush); +int vsp1_du_map_sg(struct device *dev, struct sg_table *sgt) +{ + struct vsp1_device *vsp1 = dev_get_drvdata(dev); + + /* + * As all the buffers allocated by the DU driver are coherent, we can + * skip cache sync. This will need to be revisited when support for + * non-coherent buffers will be added to the DU driver. + */ + return dma_map_sg_attrs(vsp1->bus_master, sgt->sgl, sgt->nents, + DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); +} +EXPORT_SYMBOL_GPL(vsp1_du_map_sg); + +void vsp1_du_unmap_sg(struct device *dev, struct sg_table *sgt) +{ + struct vsp1_device *vsp1 = dev_get_drvdata(dev); + + dma_unmap_sg_attrs(vsp1->bus_master, sgt->sgl, sgt->nents, + DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); +} +EXPORT_SYMBOL_GPL(vsp1_du_unmap_sg); + /* ----------------------------------------------------------------------------- * Initialization */ diff --git a/include/media/vsp1.h b/include/media/vsp1.h index c135c47b4641..c837383b2013 100644 --- a/include/media/vsp1.h +++ b/include/media/vsp1.h @@ -13,6 +13,7 @@ #ifndef __MEDIA_VSP1_H__ #define __MEDIA_VSP1_H__ +#include <linux/scatterlist.h> #include <linux/types.h> #include <linux/videodev2.h> @@ -53,5 +54,7 @@ void vsp1_du_atomic_begin(struct device *dev); int vsp1_du_atomic_update(struct device *dev, unsigned int rpf, const struct vsp1_du_atomic_config *cfg); void vsp1_du_atomic_flush(struct device *dev); +int vsp1_du_map_sg(struct device *dev, struct sg_table *sgt); +void vsp1_du_unmap_sg(struct device *dev, struct sg_table *sgt); #endif /* __MEDIA_VSP1_H__ */ |