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

From: Hans Verkuil
Date: Mon Dec 01 2014 - 06:23:49 EST

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On 11/18/2014 02:00 PM, Lad, Prabhakar wrote:
> This patch does the following:
>
> 1: Simplify the vpe mem-to-mem driver by using the m2m ioctl
> and vb2 helpers.
> 2: Minor code cleanup

FYI: I want to postpone this patch until Nikhil's ti-vpe changes are in (assuming
that will happen soon). I think his series conflicts with this, and it is likely
to be easier for you to rebase once his code is in.

Regards,

Hans

>
> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@xxxxxxxxx>
> ---
> drivers/media/platform/ti-vpe/vpe.c | 152 +++++++++++-------------------------
> 1 file changed, 47 insertions(+), 105 deletions(-)
>
> diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
> index 74b858d..faf38d4 100644
> --- a/drivers/media/platform/ti-vpe/vpe.c
> +++ b/drivers/media/platform/ti-vpe/vpe.c
> @@ -21,6 +21,7 @@
> #include <linux/dma-mapping.h>
> #include <linux/err.h>
> #include <linux/fs.h>
> +#include <linux/of.h>
> #include <linux/interrupt.h>
> #include <linux/io.h>
> #include <linux/ioctl.h>
> @@ -377,7 +378,6 @@ 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 */
> @@ -916,8 +916,8 @@ static int job_ready(void *priv)
> * When called by m2m framework, this will always satisy, but when
> * called from vpe_irq, this might fail. (src stream with zero buffers)
> */
> - if (v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) <= 0 ||
> - v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) <= 0)
> + if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) <= 0 ||
> + v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) <= 0)
> return 0;
>
> return 1;
> @@ -1155,14 +1155,14 @@ static void device_run(void *priv)
> * in the same buffer. (so that job_ready won't fail)
> * It will be removed when using bottom field
> */
> - ctx->src_vbs[0] = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
> + ctx->src_vbs[0] = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
> WARN_ON(ctx->src_vbs[0] == NULL);
> } else {
> - 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);
>
> if (ctx->deinterlacing) {
> @@ -1422,7 +1422,7 @@ 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;
> }
> @@ -1483,7 +1483,7 @@ 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;
>
> @@ -1624,7 +1624,7 @@ 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;
>
> @@ -1852,55 +1852,6 @@ 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);
> -
> - if (ctx->deinterlacing)
> - config_edi_input_mode(ctx, 0x0);
> -
> - 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
> @@ -1945,16 +1896,15 @@ 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,
> };
>
> /*
> @@ -2027,7 +1977,25 @@ 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)
> +{
> + struct vpe_ctx *ctx = vb2_get_drv_priv(q);
> +
> + if (ctx->deinterlacing)
> + config_edi_input_mode(ctx, 0x0);
> +
> + 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 = {
> @@ -2036,6 +2004,8 @@ 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,
> @@ -2089,7 +2059,7 @@ 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_ctx *ctx;
> struct vpe_q_data *s_q_data;
> struct v4l2_ctrl_handler *hdl;
> int ret;
> @@ -2164,10 +2134,10 @@ 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;
> }
>
> @@ -2186,7 +2156,7 @@ 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);
>
> @@ -2224,7 +2194,7 @@ 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);
>
> @@ -2241,39 +2211,13 @@ 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 = {
> @@ -2475,8 +2419,6 @@ static const struct of_device_id vpe_of_match[] = {
> },
> {},
> };
> -#else
> -#define vpe_of_match NULL
> #endif
>
> static struct platform_driver vpe_pdrv = {
> @@ -2485,7 +2427,7 @@ 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),
> },
> };
>
>

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Next message: walter harms: "Re: Determination for the number of named function parameters (with SmPL)"
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