From: Vaibhav Hiremath <hvaibhav@xxxxxx>
Actually OMAP doesn't support scatter-gather DMA for
Display subsystem but due to legacy coding it has been overlooked
till now.
Signed-off-by: Vaibhav Hiremath <hvaibhav@xxxxxx>
---
drivers/media/video/omap/Kconfig | 2 +-
drivers/media/video/omap/omap_vout.c | 46 +++++++++++-----------------------
2 files changed, 16 insertions(+), 32 deletions(-)
diff --git a/drivers/media/video/omap/Kconfig b/drivers/media/video/omap/Kconfig
index c1d1933..e63233f 100644
--- a/drivers/media/video/omap/Kconfig
+++ b/drivers/media/video/omap/Kconfig
@@ -2,7 +2,7 @@ config VIDEO_OMAP2_VOUT
tristate "OMAP2/OMAP3 V4L2-Display driver"
depends on ARCH_OMAP2 || ARCH_OMAP3
select VIDEOBUF_GEN
- select VIDEOBUF_DMA_SG
+ select VIDEOBUF_DMA_CONTIG
select OMAP2_DSS
select OMAP2_VRAM
select OMAP2_VRFB
diff --git a/drivers/media/video/omap/omap_vout.c b/drivers/media/video/omap/omap_vout.c
index 08b2fb8..6914221 100644
--- a/drivers/media/video/omap/omap_vout.c
+++ b/drivers/media/video/omap/omap_vout.c
@@ -40,7 +40,7 @@
#include <linux/videodev2.h>
#include <linux/slab.h>
-#include <media/videobuf-dma-sg.h>
+#include <media/videobuf-dma-contig.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
@@ -1054,9 +1054,9 @@ static int omap_vout_buffer_prepare(struct videobuf_queue *q,
struct videobuf_buffer *vb,
enum v4l2_field field)
{
+ dma_addr_t dmabuf;
struct vid_vrfb_dma *tx;
enum dss_rotation rotation;
- struct videobuf_dmabuf *dmabuf = NULL;
struct omap_vout_device *vout = q->priv_data;
u32 dest_frame_index = 0, src_element_index = 0;
u32 dest_element_index = 0, src_frame_index = 0;
@@ -1075,24 +1075,17 @@ static int omap_vout_buffer_prepare(struct videobuf_queue *q,
if (V4L2_MEMORY_USERPTR == vb->memory) {
if (0 == vb->baddr)
return -EINVAL;
- /* Virtual address */
- /* priv points to struct videobuf_pci_sg_memory. But we went
- * pointer to videobuf_dmabuf, which is member of
- * videobuf_pci_sg_memory */
- dmabuf = videobuf_to_dma(q->bufs[vb->i]);
- dmabuf->vmalloc = (void *) vb->baddr;
-
/* Physical address */
- dmabuf->bus_addr =
- (dma_addr_t) omap_vout_uservirt_to_phys(vb->baddr);
+ vout->queued_buf_addr[vb->i] = (u8 *)
+ omap_vout_uservirt_to_phys(vb->baddr);
+ } else {
+ vout->queued_buf_addr[vb->i] = (u8 *)vout->buf_phy_addr[vb->i];
}
- if (!rotation_enabled(vout)) {
- dmabuf = videobuf_to_dma(q->bufs[vb->i]);
- vout->queued_buf_addr[vb->i] = (u8 *) dmabuf->bus_addr;
+ if (!rotation_enabled(vout))
return 0;
- }
- dmabuf = videobuf_to_dma(q->bufs[vb->i]);
+
+ dmabuf = vout->buf_phy_addr[vb->i];
/* If rotation is enabled, copy input buffer into VRFB
* memory space using DMA. We are copying input buffer
* into VRFB memory space of desired angle and DSS will
@@ -1121,7 +1114,7 @@ static int omap_vout_buffer_prepare(struct videobuf_queue *q,
tx->dev_id, 0x0);
/* src_port required only for OMAP1 */
omap_set_dma_src_params(tx->dma_ch, 0, OMAP_DMA_AMODE_POST_INC,
- dmabuf->bus_addr, src_element_index, src_frame_index);
+ dmabuf, src_element_index, src_frame_index);
/*set dma source burst mode for VRFB */
omap_set_dma_src_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16);
rotation = calc_rotation(vout);
@@ -1212,7 +1205,6 @@ static int omap_vout_mmap(struct file *file, struct vm_area_struct *vma)
void *pos;
unsigned long start = vma->vm_start;
unsigned long size = (vma->vm_end - vma->vm_start);
- struct videobuf_dmabuf *dmabuf = NULL;
struct omap_vout_device *vout = file->private_data;
struct videobuf_queue *q = &vout->vbq;
@@ -1242,8 +1234,7 @@ static int omap_vout_mmap(struct file *file, struct vm_area_struct *vma)
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
vma->vm_ops = &omap_vout_vm_ops;
vma->vm_private_data = (void *) vout;
- dmabuf = videobuf_to_dma(q->bufs[i]);
- pos = dmabuf->vmalloc;
+ pos = (void *)vout->buf_virt_addr[i];
vma->vm_pgoff = virt_to_phys((void *)pos) >> PAGE_SHIFT;
while (size > 0) {
unsigned long pfn;
@@ -1348,8 +1339,8 @@ static int omap_vout_open(struct file *file)
video_vbq_ops.buf_queue = omap_vout_buffer_queue;
spin_lock_init(&vout->vbq_lock);
- videobuf_queue_sg_init(q, &video_vbq_ops, NULL, &vout->vbq_lock,
- vout->type, V4L2_FIELD_NONE,
+ videobuf_queue_dma_contig_init(q, &video_vbq_ops, q->dev,
+ &vout->vbq_lock, vout->type, V4L2_FIELD_NONE,
sizeof(struct videobuf_buffer), vout);
v4l2_dbg(1, debug, &vout->vid_dev->v4l2_dev, "Exiting %s\n", __func__);
@@ -1800,7 +1791,6 @@ static int vidioc_reqbufs(struct file *file, void *fh,
unsigned int i, num_buffers = 0;
struct omap_vout_device *vout = fh;
struct videobuf_queue *q = &vout->vbq;
- struct videobuf_dmabuf *dmabuf = NULL;
if ((req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) || (req->count < 0))
return -EINVAL;
@@ -1826,8 +1816,7 @@ static int vidioc_reqbufs(struct file *file, void *fh,
num_buffers = (vout->vid == OMAP_VIDEO1) ?
video1_numbuffers : video2_numbuffers;
for (i = num_buffers; i < vout->buffer_allocated; i++) {
- dmabuf = videobuf_to_dma(q->bufs[i]);
- omap_vout_free_buffer((u32)dmabuf->vmalloc,
+ omap_vout_free_buffer(vout->buf_virt_addr[i],
vout->buffer_size);
vout->buf_virt_addr[i] = 0;
vout->buf_phy_addr[i] = 0;
@@ -1856,12 +1845,7 @@ static int vidioc_reqbufs(struct file *file, void *fh,
goto reqbuf_err;
vout->buffer_allocated = req->count;
- for (i = 0; i < req->count; i++) {
- dmabuf = videobuf_to_dma(q->bufs[i]);
- dmabuf->vmalloc = (void *) vout->buf_virt_addr[i];
- dmabuf->bus_addr = (dma_addr_t) vout->buf_phy_addr[i];
- dmabuf->sglen = 1;
- }
+
reqbuf_err:
mutex_unlock(&vout->lock);
return ret;
--
1.6.2.4
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