[PATCH 4/8] videobuf2: move cache_hints handling to allocators

[Sergey Senozhatsky]

This moves cache hints handling from videobuf2 core down
to allocators level, because allocators do the sync/flush
caches eventually and may take better decisions. Besides,
allocators already decide whether cache sync/flush should
be done or can be skipped. This patch moves the scattered
buffer cache sync logic to one common place.

Signed-off-by: Sergey Senozhatsky <senozhat...@chromium.org>
---
 drivers/media/common/videobuf2/videobuf2-core.c       | 6 ------
 drivers/media/common/videobuf2/videobuf2-dma-contig.c | 6 ++++++
 drivers/media/common/videobuf2/videobuf2-dma-sg.c     | 6 ++++++
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/media/common/videobuf2/videobuf2-core.c 
b/drivers/media/common/videobuf2/videobuf2-core.c
index 76210c006958..55af63d54f23 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -328,9 +328,6 @@ static void __vb2_buf_mem_prepare(struct vb2_buffer *vb)
                return;
 
        vb->synced = 1;
-       if (vb->skip_cache_sync_on_prepare)
-               return;
-
        for (plane = 0; plane < vb->num_planes; ++plane)
                call_void_memop(vb, prepare, vb->planes[plane].mem_priv);
 }
@@ -347,9 +344,6 @@ static void __vb2_buf_mem_finish(struct vb2_buffer *vb)
                return;
 
        vb->synced = 0;
-       if (vb->skip_cache_sync_on_finish)
-               return;
-
        for (plane = 0; plane < vb->num_planes; ++plane)
                call_void_memop(vb, finish, vb->planes[plane].mem_priv);
 }
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c 
b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
index 019c3843dc6d..1e218bc440c6 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
@@ -101,6 +101,9 @@ static void vb2_dc_prepare(void *buf_priv)
        struct vb2_dc_buf *buf = buf_priv;
        struct sg_table *sgt = buf->dma_sgt;
 
+       if (buf->vb->skip_cache_sync_on_prepare)
+               return;
+
        if (!sgt)
                return;
 
@@ -112,6 +115,9 @@ static void vb2_dc_finish(void *buf_priv)
        struct vb2_dc_buf *buf = buf_priv;
        struct sg_table *sgt = buf->dma_sgt;
 
+       if (buf->vb->skip_cache_sync_on_finish)
+               return;
+
        if (!sgt)
                return;
 
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c 
b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
index 71094cb5c5d7..cb587c5a345b 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
@@ -204,6 +204,9 @@ static void vb2_dma_sg_prepare(void *buf_priv)
        struct vb2_dma_sg_buf *buf = buf_priv;
        struct sg_table *sgt = buf->dma_sgt;
 
+       if (buf->vb->skip_cache_sync_on_prepare)
+               return;
+
        dma_sync_sgtable_for_device(buf->dev, sgt, buf->dma_dir);
 }
 
@@ -212,6 +215,9 @@ static void vb2_dma_sg_finish(void *buf_priv)
        struct vb2_dma_sg_buf *buf = buf_priv;
        struct sg_table *sgt = buf->dma_sgt;
 
+       if (buf->vb->skip_cache_sync_on_finish)
+               return;
+
        dma_sync_sgtable_for_cpu(buf->dev, sgt, buf->dma_dir);
 }
 
-- 
2.30.1.766.gb4fecdf3b7-goog