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[media] coda: allocate bitstream buffer from REQBUFS, size depends on the format

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Allocating the bitstream buffer only when the format is set allows to guarantee
that at least two frames fit into the bitstream buffer. For small frame sizes
a smaller bitstream buffer can be allocated. Since the bitstream buffer size now
depends on the format, replace CODA_MAX_FRAME_SIZE with ctx->bitstream.size
where appropriate and remove the now unused constant.
Since REQBUFS can be called multiple times, but the format can't be changed
unless REQBUFS 0 was called before, we can just keep the allocated context and
bitstream buffers if REQBUFS is called multiple times with a non-zero buffer
count.

[fixed a resource leak preventing repeatedly decoding]

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Philipp Zabel 2015-03-24 14:30:52 -03:00 committed by Mauro Carvalho Chehab
parent 73751da61c
commit ad532d37b2
3 changed files with 58 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

85
drivers/media/platform/coda/coda-bit.c
View File

@ -15,6 +15,7 @@
#include <linux/clk.h>
#include <linux/irqreturn.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/slab.h>
@ -36,6 +37,8 @@
#define CODA_DEFAULT_GAMMA 4096
#define CODA9_DEFAULT_GAMMA 24576 /* 0.75 * 32768 */
static void coda_free_bitstream_buffer(struct coda_ctx *ctx);
static inline int coda_is_initialized(struct coda_dev *dev)
{
return coda_read(dev, CODA_REG_BIT_CUR_PC) != 0;
@ -389,21 +392,7 @@ static int coda_alloc_context_buffers(struct coda_ctx *ctx,
if (dev->devtype->product == CODA_DX6)
return 0;
if (ctx->psbuf.vaddr) {
v4l2_err(&dev->v4l2_dev, "psmembuf still allocated\n");
return -EBUSY;
}
if (ctx->slicebuf.vaddr) {
v4l2_err(&dev->v4l2_dev, "slicebuf still allocated\n");
return -EBUSY;
}
if (ctx->workbuf.vaddr) {
v4l2_err(&dev->v4l2_dev, "context buffer still allocated\n");
ret = -EBUSY;
return -ENOMEM;
}
if (q_data->fourcc == V4L2_PIX_FMT_H264) {
if (!ctx->slicebuf.vaddr && q_data->fourcc == V4L2_PIX_FMT_H264) {
/* worst case slice size */
size = (DIV_ROUND_UP(q_data->width, 16) *
DIV_ROUND_UP(q_data->height, 16)) * 3200 / 8 + 512;
@ -417,7 +406,7 @@ static int coda_alloc_context_buffers(struct coda_ctx *ctx,
}
}
if (dev->devtype->product == CODA_7541) {
if (!ctx->psbuf.vaddr && dev->devtype->product == CODA_7541) {
ret = coda_alloc_context_buf(ctx, &ctx->psbuf,
CODA7_PS_BUF_SIZE, "psbuf");
if (ret < 0) {
@ -427,16 +416,19 @@ static int coda_alloc_context_buffers(struct coda_ctx *ctx,
}
}
size = dev->devtype->workbuf_size;
if (dev->devtype->product == CODA_960 &&
q_data->fourcc == V4L2_PIX_FMT_H264)
size += CODA9_PS_SAVE_SIZE;
ret = coda_alloc_context_buf(ctx, &ctx->workbuf, size, "workbuf");
if (ret < 0) {
v4l2_err(&dev->v4l2_dev,
"failed to allocate %d byte context buffer",
ctx->workbuf.size);
goto err;
if (!ctx->workbuf.vaddr) {
size = dev->devtype->workbuf_size;
if (dev->devtype->product == CODA_960 &&
q_data->fourcc == V4L2_PIX_FMT_H264)
size += CODA9_PS_SAVE_SIZE;
ret = coda_alloc_context_buf(ctx, &ctx->workbuf, size,
"workbuf");
if (ret < 0) {
v4l2_err(&dev->v4l2_dev,
"failed to allocate %d byte context buffer",
ctx->workbuf.size);
goto err;
}
}
return 0;
@ -1337,6 +1329,7 @@ static void coda_bit_release(struct coda_ctx *ctx)
mutex_lock(&ctx->buffer_mutex);
coda_free_framebuffers(ctx);
coda_free_context_buffers(ctx);
coda_free_bitstream_buffer(ctx);
mutex_unlock(&ctx->buffer_mutex);
}
@ -1354,6 +1347,38 @@ const struct coda_context_ops coda_bit_encode_ops = {
* Decoder context operations
*/
static int coda_alloc_bitstream_buffer(struct coda_ctx *ctx,
struct coda_q_data *q_data)
{
if (ctx->bitstream.vaddr)
return 0;
ctx->bitstream.size = roundup_pow_of_two(q_data->sizeimage * 2);
ctx->bitstream.vaddr = dma_alloc_writecombine(
&ctx->dev->plat_dev->dev, ctx->bitstream.size,
&ctx->bitstream.paddr, GFP_KERNEL);
if (!ctx->bitstream.vaddr) {
v4l2_err(&ctx->dev->v4l2_dev,
"failed to allocate bitstream ringbuffer");
return -ENOMEM;
}
kfifo_init(&ctx->bitstream_fifo,
ctx->bitstream.vaddr, ctx->bitstream.size);
return 0;
}
static void coda_free_bitstream_buffer(struct coda_ctx *ctx)
{
if (ctx->bitstream.vaddr == NULL)
return;
dma_free_writecombine(&ctx->dev->plat_dev->dev, ctx->bitstream.size,
ctx->bitstream.vaddr, ctx->bitstream.paddr);
ctx->bitstream.vaddr = NULL;
kfifo_init(&ctx->bitstream_fifo, NULL, 0);
}
static int coda_decoder_reqbufs(struct coda_ctx *ctx,
struct v4l2_requestbuffers *rb)
{
@ -1368,7 +1393,13 @@ static int coda_decoder_reqbufs(struct coda_ctx *ctx,
ret = coda_alloc_context_buffers(ctx, q_data_src);
if (ret < 0)
return ret;
ret = coda_alloc_bitstream_buffer(ctx, q_data_src);
if (ret < 0) {
coda_free_context_buffers(ctx);
return ret;
}
} else {
coda_free_bitstream_buffer(ctx);
coda_free_context_buffers(ctx);
}
@ -1736,7 +1767,7 @@ static void coda_finish_decode(struct coda_ctx *ctx)
* by up to 512 bytes
*/
if (ctx->bit_stream_param & CODA_BIT_STREAM_END_FLAG) {
if (coda_get_bitstream_payload(ctx) >= CODA_MAX_FRAME_SIZE - 512)
if (coda_get_bitstream_payload(ctx) >= ctx->bitstream.size - 512)
kfifo_init(&ctx->bitstream_fifo,
ctx->bitstream.vaddr, ctx->bitstream.size);
}

22
drivers/media/platform/coda/coda-common.c
View File

@ -1723,20 +1723,6 @@ static int coda_open(struct file *file)
goto err_dma_alloc;
}
}
if (ctx->use_bit && ctx->inst_type == CODA_INST_DECODER) {
ctx->bitstream.size = CODA_MAX_FRAME_SIZE;
ctx->bitstream.vaddr = dma_alloc_writecombine(
&dev->plat_dev->dev, ctx->bitstream.size,
&ctx->bitstream.paddr, GFP_KERNEL);
if (!ctx->bitstream.vaddr) {
v4l2_err(&dev->v4l2_dev,
"failed to allocate bitstream ringbuffer");
ret = -ENOMEM;
goto err_dma_writecombine;
}
}
kfifo_init(&ctx->bitstream_fifo,
ctx->bitstream.vaddr, ctx->bitstream.size);
mutex_init(&ctx->bitstream_mutex);
mutex_init(&ctx->buffer_mutex);
INIT_LIST_HEAD(&ctx->buffer_meta_list);
@ -1750,10 +1736,6 @@ static int coda_open(struct file *file)
return 0;
err_dma_writecombine:
if (ctx->dev->devtype->product == CODA_DX6)
coda_free_aux_buf(dev, &ctx->workbuf);
coda_free_aux_buf(dev, &ctx->parabuf);
err_dma_alloc:
v4l2_ctrl_handler_free(&ctx->ctrls);
err_ctrls_setup:
@ -1798,10 +1780,6 @@ static int coda_release(struct file *file)
list_del(&ctx->list);
coda_unlock(ctx);
if (ctx->bitstream.vaddr) {
dma_free_writecombine(&dev->plat_dev->dev, ctx->bitstream.size,
ctx->bitstream.vaddr, ctx->bitstream.paddr);
}
if (ctx->dev->devtype->product == CODA_DX6)
coda_free_aux_buf(dev, &ctx->workbuf);

1
drivers/media/platform/coda/coda.h
View File

@ -26,7 +26,6 @@
#include "coda_regs.h"
#define CODA_MAX_FRAMEBUFFERS 8
#define CODA_MAX_FRAME_SIZE 0x100000
#define FMO_SLICE_SAVE_BUF_SIZE (32)
enum {