[PATCH v2] media: ti-vpe: Use mem-to-mem ioctl helpers

From: Lad, Prabhakar
Date: Fri Dec 19 2014 - 08:52:44 EST

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1: Simplify the vpe mem-to-mem driver by using the m2m ioctl
and vb2 helpers.
2: Align and arranged the v4l2_ioctl_ops.
3: Fixes a typo.
4: Use of_match_ptr() instead of explicitly defining the macro
to NULL in case CONFIG_OF is not defined.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@xxxxxxxxx>
---
Note:-
1: This patch is on top of https://patchwork.linuxtv.org/patch/27161/
2: Compile tested only.

drivers/media/platform/ti-vpe/vpe.c | 157 ++++++++++++------------------------
1 file changed, 50 insertions(+), 107 deletions(-)

diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
index d5d745d..7d2564c 100644
--- a/drivers/media/platform/ti-vpe/vpe.c
+++ b/drivers/media/platform/ti-vpe/vpe.c
@@ -25,6 +25,7 @@
#include <linux/io.h>
#include <linux/ioctl.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/sched.h>
@@ -74,7 +75,7 @@
#define VPE_DEF_BUFS_PER_JOB 1 /* default one buffer per batch job */

/*
- * each VPE context can need up to 3 config desciptors, 7 input descriptors,
+ * each VPE context can need up to 3 config descriptors, 7 input descriptors,
* 3 output descriptors, and 10 control descriptors
*/
#define VPE_DESC_LIST_SIZE (10 * VPDMA_DTD_DESC_SIZE + \
@@ -373,7 +374,6 @@ struct vpe_dev {
struct vpe_ctx {
struct v4l2_fh fh;
struct vpe_dev *dev;
- struct v4l2_m2m_ctx *m2m_ctx;
struct v4l2_ctrl_handler hdl;

unsigned int field; /* current field */
@@ -887,10 +887,10 @@ static int job_ready(void *priv)
if (ctx->deinterlacing && ctx->src_vbs[2] == NULL)
needed += 2; /* need additional two most recent fields */

- if (v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) < needed)
+ if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < needed)
return 0;

- if (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) < needed)
+ if (v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < needed)
return 0;

return 1;
@@ -1100,15 +1100,15 @@ static void device_run(void *priv)
struct vpe_q_data *d_q_data = &ctx->q_data[Q_DATA_DST];

if (ctx->deinterlacing && ctx->src_vbs[2] == NULL) {
- ctx->src_vbs[2] = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
+ ctx->src_vbs[2] = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
WARN_ON(ctx->src_vbs[2] == NULL);
- ctx->src_vbs[1] = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
+ ctx->src_vbs[1] = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
WARN_ON(ctx->src_vbs[1] == NULL);
}

- ctx->src_vbs[0] = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
+ ctx->src_vbs[0] = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
WARN_ON(ctx->src_vbs[0] == NULL);
- ctx->dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
+ ctx->dst_vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
WARN_ON(ctx->dst_vb == NULL);

/* config descriptors */
@@ -1334,7 +1334,7 @@ static irqreturn_t vpe_irq(int irq_vpe, void *data)
finished:
vpe_dbg(ctx->dev, "finishing transaction\n");
ctx->bufs_completed = 0;
- v4l2_m2m_job_finish(dev->m2m_dev, ctx->m2m_ctx);
+ v4l2_m2m_job_finish(dev->m2m_dev, ctx->fh.m2m_ctx);
handled:
return IRQ_HANDLED;
}
@@ -1395,7 +1395,7 @@ static int vpe_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
struct vpe_q_data *q_data;
int i;

- vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
if (!vq)
return -EINVAL;

@@ -1527,7 +1527,7 @@ static int __vpe_s_fmt(struct vpe_ctx *ctx, struct v4l2_format *f)
struct vb2_queue *vq;
int i;

- vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
if (!vq)
return -EINVAL;

@@ -1739,52 +1739,6 @@ static int vpe_s_selection(struct file *file, void *fh,
return set_srcdst_params(ctx);
}

-static int vpe_reqbufs(struct file *file, void *priv,
- struct v4l2_requestbuffers *reqbufs)
-{
- struct vpe_ctx *ctx = file2ctx(file);
-
- return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
-}
-
-static int vpe_querybuf(struct file *file, void *priv, struct v4l2_buffer *buf)
-{
- struct vpe_ctx *ctx = file2ctx(file);
-
- return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
-}
-
-static int vpe_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
-{
- struct vpe_ctx *ctx = file2ctx(file);
-
- return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
-}
-
-static int vpe_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
-{
- struct vpe_ctx *ctx = file2ctx(file);
-
- return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
-}
-
-static int vpe_streamon(struct file *file, void *priv, enum v4l2_buf_type type)
-{
- struct vpe_ctx *ctx = file2ctx(file);
-
- return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
-}
-
-static int vpe_streamoff(struct file *file, void *priv, enum v4l2_buf_type type)
-{
- struct vpe_ctx *ctx = file2ctx(file);
-
- vpe_dump_regs(ctx->dev);
- vpdma_dump_regs(ctx->dev->vpdma);
-
- return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
-}
-
/*
* defines number of buffers/frames a context can process with VPE before
* switching to a different context. default value is 1 buffer per context
@@ -1814,14 +1768,14 @@ static const struct v4l2_ctrl_ops vpe_ctrl_ops = {
};

static const struct v4l2_ioctl_ops vpe_ioctl_ops = {
- .vidioc_querycap = vpe_querycap,
+ .vidioc_querycap = vpe_querycap,

- .vidioc_enum_fmt_vid_cap_mplane = vpe_enum_fmt,
+ .vidioc_enum_fmt_vid_cap_mplane = vpe_enum_fmt,
.vidioc_g_fmt_vid_cap_mplane = vpe_g_fmt,
.vidioc_try_fmt_vid_cap_mplane = vpe_try_fmt,
.vidioc_s_fmt_vid_cap_mplane = vpe_s_fmt,

- .vidioc_enum_fmt_vid_out_mplane = vpe_enum_fmt,
+ .vidioc_enum_fmt_vid_out_mplane = vpe_enum_fmt,
.vidioc_g_fmt_vid_out_mplane = vpe_g_fmt,
.vidioc_try_fmt_vid_out_mplane = vpe_try_fmt,
.vidioc_s_fmt_vid_out_mplane = vpe_s_fmt,
@@ -1829,16 +1783,15 @@ static const struct v4l2_ioctl_ops vpe_ioctl_ops = {
.vidioc_g_selection = vpe_g_selection,
.vidioc_s_selection = vpe_s_selection,

- .vidioc_reqbufs = vpe_reqbufs,
- .vidioc_querybuf = vpe_querybuf,
+ .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
+ .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
+ .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
+ .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
+ .vidioc_streamon = v4l2_m2m_ioctl_streamon,
+ .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,

- .vidioc_qbuf = vpe_qbuf,
- .vidioc_dqbuf = vpe_dqbuf,
-
- .vidioc_streamon = vpe_streamon,
- .vidioc_streamoff = vpe_streamoff,
- .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
- .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

/*
@@ -1910,7 +1863,23 @@ static int vpe_buf_prepare(struct vb2_buffer *vb)
static void vpe_buf_queue(struct vb2_buffer *vb)
{
struct vpe_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
- v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
+
+ v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vb);
+}
+
+static int vpe_start_streaming(struct vb2_queue *q, unsigned int count)
+{
+ /* currently we do nothing here */
+
+ return 0;
+}
+
+static void vpe_stop_streaming(struct vb2_queue *q)
+{
+ struct vpe_ctx *ctx = vb2_get_drv_priv(q);
+
+ vpe_dump_regs(ctx->dev);
+ vpdma_dump_regs(ctx->dev->vpdma);
}

static struct vb2_ops vpe_qops = {
@@ -1919,6 +1888,8 @@ static struct vb2_ops vpe_qops = {
.buf_queue = vpe_buf_queue,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
+ .start_streaming = vpe_start_streaming,
+ .stop_streaming = vpe_stop_streaming,
};

static int queue_init(void *priv, struct vb2_queue *src_vq,
@@ -1972,9 +1943,9 @@ static const struct v4l2_ctrl_config vpe_bufs_per_job = {
static int vpe_open(struct file *file)
{
struct vpe_dev *dev = video_drvdata(file);
- struct vpe_ctx *ctx = NULL;
struct vpe_q_data *s_q_data;
struct v4l2_ctrl_handler *hdl;
+ struct vpe_ctx *ctx;
int ret;

vpe_dbg(dev, "vpe_open\n");
@@ -2047,10 +2018,10 @@ static int vpe_open(struct file *file)
if (ret)
goto exit_fh;

- ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
+ ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);

- if (IS_ERR(ctx->m2m_ctx)) {
- ret = PTR_ERR(ctx->m2m_ctx);
+ if (IS_ERR(ctx->fh.m2m_ctx)) {
+ ret = PTR_ERR(ctx->fh.m2m_ctx);
goto exit_fh;
}

@@ -2069,7 +2040,7 @@ static int vpe_open(struct file *file)
ctx->load_mmrs = true;

vpe_dbg(dev, "created instance %p, m2m_ctx: %p\n",
- ctx, ctx->m2m_ctx);
+ ctx, ctx->fh.m2m_ctx);

mutex_unlock(&dev->dev_mutex);

@@ -2107,7 +2078,7 @@ static int vpe_release(struct file *file)
v4l2_fh_del(&ctx->fh);
v4l2_fh_exit(&ctx->fh);
v4l2_ctrl_handler_free(&ctx->hdl);
- v4l2_m2m_ctx_release(ctx->m2m_ctx);
+ v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);

kfree(ctx);

@@ -2124,39 +2095,13 @@ static int vpe_release(struct file *file)
return 0;
}

-static unsigned int vpe_poll(struct file *file,
- struct poll_table_struct *wait)
-{
- struct vpe_ctx *ctx = file2ctx(file);
- struct vpe_dev *dev = ctx->dev;
- int ret;
-
- mutex_lock(&dev->dev_mutex);
- ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
- mutex_unlock(&dev->dev_mutex);
- return ret;
-}
-
-static int vpe_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct vpe_ctx *ctx = file2ctx(file);
- struct vpe_dev *dev = ctx->dev;
- int ret;
-
- if (mutex_lock_interruptible(&dev->dev_mutex))
- return -ERESTARTSYS;
- ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
- mutex_unlock(&dev->dev_mutex);
- return ret;
-}
-
static const struct v4l2_file_operations vpe_fops = {
.owner = THIS_MODULE,
.open = vpe_open,
.release = vpe_release,
- .poll = vpe_poll,
+ .poll = v4l2_m2m_fop_poll,
.unlocked_ioctl = video_ioctl2,
- .mmap = vpe_mmap,
+ .mmap = v4l2_m2m_fop_mmap,
};

static struct video_device vpe_videodev = {
@@ -2358,8 +2303,6 @@ static const struct of_device_id vpe_of_match[] = {
},
{},
};
-#else
-#define vpe_of_match NULL
#endif

static struct platform_driver vpe_pdrv = {
@@ -2368,7 +2311,7 @@ static struct platform_driver vpe_pdrv = {
.driver = {
.name = VPE_MODULE_NAME,
.owner = THIS_MODULE,
- .of_match_table = vpe_of_match,
+ .of_match_table = of_match_ptr(vpe_of_match),
},
};

--
1.9.1

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