On Thu, Jan 9, 2020 at 12:58 PM Bingbu Cao <bingbu.cao@xxxxxxxxxxxxxxx> wrote:
>
>
>
> On 1/8/20 8:57 PM, Tomasz Figa wrote:
> > On Mon, Dec 30, 2019 at 6:21 PM Bingbu Cao <bingbu.cao@xxxxxxxxx> wrote:
> >>
> >> Currently, the imgu running mode need user to set by v4l2 ctrl.
> >> However, imgu only support 2 pipes and 2 operation modes - video and
> >> still. This patch make the first imgu subdev running as video and second
> >> one running as still, it will make the user understand easily, it can
> >> also cover current camera use cases requirement. The running mode is set
> >> during subdev registering, no race-condition after change, so it is safe
> >> to change the mode data type to integer.
> >>
> >> Signed-off-by: Bingbu Cao <bingbu.cao@xxxxxxxxx>
> >> ---
> >> Documentation/media/v4l-drivers/ipu3.rst | 6 +-
> >> drivers/staging/media/ipu3/include/intel-ipu3.h | 4 --
> >> drivers/staging/media/ipu3/ipu3-v4l2.c | 74 +++----------------------
> >> drivers/staging/media/ipu3/ipu3.h | 5 +-
> >> 4 files changed, 12 insertions(+), 77 deletions(-)
> >>
> >
> > Doesn't it make it impossible to use two video (aka fast) pipes?
> Hi, Tomasz,
> Yes, once applying this patch, you can not run two video pipes with same input.
> I have no idea what are fast pipes and which scenario need two video pipes if
> the driver did not support multiple camera?
Processing in video pipes is faster than in still pipes and so one
could still want to use two video pipes for lower system load and thus
also lower power consumption, even for a single camera scenario, but
with ZSL.
That said, AFAICT CIO2 wouldn't have problems handling 2 raw captures,
so why would we want to prevent anyone from having 2 video pipes for 2
different cameras?
> >
> > Best regards,
> > Tomasz
> >
> >> diff --git a/Documentation/media/v4l-drivers/ipu3.rst b/Documentation/media/v4l-drivers/ipu3.rst
> >> index e4904ab44e60..50bd264a3408 100644
> >> --- a/Documentation/media/v4l-drivers/ipu3.rst
> >> +++ b/Documentation/media/v4l-drivers/ipu3.rst
> >> @@ -234,9 +234,9 @@ The IPU3 ImgU pipelines can be configured using the Media Controller, defined at
> >> Firmware binary selection
> >> -------------------------
> >>
> >> -The firmware binary is selected using the V4L2_CID_INTEL_IPU3_MODE, currently
> >> -defined in drivers/staging/media/ipu3/include/intel-ipu3.h . "VIDEO" and "STILL"
> >> -modes are available.
> >> +The firmware binary is selected according to the running mode of imgu. There are
> >> +2 modes are available - "video" and "still". "ipu3-imgu video" are running under
> >> +"video" mode and "ipu3-imgu still" is running under "still" mode.
> >>
> >> Processing the image in raw Bayer format
> >> ----------------------------------------
> >> diff --git a/drivers/staging/media/ipu3/include/intel-ipu3.h b/drivers/staging/media/ipu3/include/intel-ipu3.h
> >> index 08eaa0bad0de..d30d9d6c92db 100644
> >> --- a/drivers/staging/media/ipu3/include/intel-ipu3.h
> >> +++ b/drivers/staging/media/ipu3/include/intel-ipu3.h
> >> @@ -12,10 +12,6 @@
> >> #define V4L2_META_FMT_IPU3_PARAMS v4l2_fourcc('i', 'p', '3', 'p') /* IPU3 processing parameters */
> >> #define V4L2_META_FMT_IPU3_STAT_3A v4l2_fourcc('i', 'p', '3', 's') /* IPU3 3A statistics */
> >>
> >> -/* from include/uapi/linux/v4l2-controls.h */
> >> -#define V4L2_CID_INTEL_IPU3_BASE (V4L2_CID_USER_BASE + 0x10c0)
> >> -#define V4L2_CID_INTEL_IPU3_MODE (V4L2_CID_INTEL_IPU3_BASE + 1)
> >> -
> >> /******************* ipu3_uapi_stats_3a *******************/
> >>
> >> #define IPU3_UAPI_MAX_STRIPES 2
> >> diff --git a/drivers/staging/media/ipu3/ipu3-v4l2.c b/drivers/staging/media/ipu3/ipu3-v4l2.c
> >> index 3c7ad1eed434..15d603690764 100644
> >> --- a/drivers/staging/media/ipu3/ipu3-v4l2.c
> >> +++ b/drivers/staging/media/ipu3/ipu3-v4l2.c
> >> @@ -67,8 +67,6 @@ static int imgu_subdev_s_stream(struct v4l2_subdev *sd, int enable)
> >> struct imgu_media_pipe *imgu_pipe = &imgu->imgu_pipe[pipe];
> >>
> >> dev_dbg(dev, "%s %d for pipe %u", __func__, enable, pipe);
> >> - /* grab ctrl after streamon and return after off */
> >> - v4l2_ctrl_grab(imgu_sd->ctrl, enable);
> >>
> >> if (!enable) {
> >> imgu_sd->active = false;
> >> @@ -96,7 +94,7 @@ static int imgu_subdev_s_stream(struct v4l2_subdev *sd, int enable)
> >> if (imgu_pipe->nodes[IMGU_NODE_VF].enabled)
> >> css_pipe->vf_output_en = true;
> >>
> >> - if (atomic_read(&imgu_sd->running_mode) == IPU3_RUNNING_MODE_VIDEO)
> >> + if (imgu_sd->running_mode == IPU3_RUNNING_MODE_VIDEO)
> >> css_pipe->pipe_id = IPU3_CSS_PIPE_ID_VIDEO;
> >> else
> >> css_pipe->pipe_id = IPU3_CSS_PIPE_ID_CAPTURE;
> >> @@ -668,7 +666,7 @@ static int imgu_fmt(struct imgu_device *imgu, unsigned int pipe, int node,
> >> if (imgu_pipe->nodes[IMGU_NODE_VF].enabled)
> >> css_pipe->vf_output_en = true;
> >>
> >> - if (atomic_read(&imgu_sd->running_mode) == IPU3_RUNNING_MODE_VIDEO)
> >> + if (imgu_sd->running_mode == IPU3_RUNNING_MODE_VIDEO)
> >> css_pipe->pipe_id = IPU3_CSS_PIPE_ID_VIDEO;
> >> else
> >> css_pipe->pipe_id = IPU3_CSS_PIPE_ID_CAPTURE;
> >> @@ -899,11 +897,6 @@ static struct v4l2_subdev_internal_ops imgu_subdev_internal_ops = {
> >> .open = imgu_subdev_open,
> >> };
> >>
> >> -static const struct v4l2_subdev_core_ops imgu_subdev_core_ops = {
> >> - .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
> >> - .unsubscribe_event = v4l2_event_subdev_unsubscribe,
> >> -};
> >> -
> >> static const struct v4l2_subdev_video_ops imgu_subdev_video_ops = {
> >> .s_stream = imgu_subdev_s_stream,
> >> };
> >> @@ -917,7 +910,6 @@ static const struct v4l2_subdev_pad_ops imgu_subdev_pad_ops = {
> >> };
> >>
> >> static const struct v4l2_subdev_ops imgu_subdev_ops = {
> >> - .core = &imgu_subdev_core_ops,
> >> .video = &imgu_subdev_video_ops,
> >> .pad = &imgu_subdev_pad_ops,
> >> };
> >> @@ -1011,44 +1003,6 @@ static const struct v4l2_ioctl_ops imgu_v4l2_meta_ioctl_ops = {
> >> .vidioc_expbuf = vb2_ioctl_expbuf,
> >> };
> >>
> >> -static int imgu_sd_s_ctrl(struct v4l2_ctrl *ctrl)
> >> -{
> >> - struct imgu_v4l2_subdev *imgu_sd =
> >> - container_of(ctrl->handler, struct imgu_v4l2_subdev, ctrl_handler);
> >> - struct imgu_device *imgu = v4l2_get_subdevdata(&imgu_sd->subdev);
> >> - struct device *dev = &imgu->pci_dev->dev;
> >> -
> >> - dev_dbg(dev, "set val %d to ctrl 0x%8x for subdev %u",
> >> - ctrl->val, ctrl->id, imgu_sd->pipe);
> >> -
> >> - switch (ctrl->id) {
> >> - case V4L2_CID_INTEL_IPU3_MODE:
> >> - atomic_set(&imgu_sd->running_mode, ctrl->val);
> >> - return 0;
> >> - default:
> >> - return -EINVAL;
> >> - }
> >> -}
> >> -
> >> -static const struct v4l2_ctrl_ops imgu_subdev_ctrl_ops = {
> >> - .s_ctrl = imgu_sd_s_ctrl,
> >> -};
> >> -
> >> -static const char * const imgu_ctrl_mode_strings[] = {
> >> - "Video mode",
> >> - "Still mode",
> >> -};
> >> -
> >> -static const struct v4l2_ctrl_config imgu_subdev_ctrl_mode = {
> >> - .ops = &imgu_subdev_ctrl_ops,
> >> - .id = V4L2_CID_INTEL_IPU3_MODE,
> >> - .name = "IPU3 Pipe Mode",
> >> - .type = V4L2_CTRL_TYPE_MENU,
> >> - .max = ARRAY_SIZE(imgu_ctrl_mode_strings) - 1,
> >> - .def = IPU3_RUNNING_MODE_VIDEO,
> >> - .qmenu = imgu_ctrl_mode_strings,
> >> -};
> >> -
> >> /******************** Framework registration ********************/
> >>
> >> /* helper function to config node's video properties */
> >> @@ -1094,7 +1048,6 @@ static int imgu_v4l2_subdev_register(struct imgu_device *imgu,
> >> unsigned int pipe)
> >> {
> >> int i, r;
> >> - struct v4l2_ctrl_handler *hdl = &imgu_sd->ctrl_handler;
> >> struct imgu_media_pipe *imgu_pipe = &imgu->imgu_pipe[pipe];
> >>
> >> /* Initialize subdev media entity */
> >> @@ -1115,21 +1068,12 @@ static int imgu_v4l2_subdev_register(struct imgu_device *imgu,
> >> v4l2_subdev_init(&imgu_sd->subdev, &imgu_subdev_ops);
> >> imgu_sd->subdev.entity.function = MEDIA_ENT_F_PROC_VIDEO_STATISTICS;
> >> imgu_sd->subdev.internal_ops = &imgu_subdev_internal_ops;
> >> - imgu_sd->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE |
> >> - V4L2_SUBDEV_FL_HAS_EVENTS;
> >> + imgu_sd->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
> >> snprintf(imgu_sd->subdev.name, sizeof(imgu_sd->subdev.name),
> >> - "%s %u", IMGU_NAME, pipe);
> >> + "%s %s", IMGU_NAME, pipe ? "still" : "video");
> >> v4l2_set_subdevdata(&imgu_sd->subdev, imgu);
> >> - atomic_set(&imgu_sd->running_mode, IPU3_RUNNING_MODE_VIDEO);
> >> - v4l2_ctrl_handler_init(hdl, 1);
> >> - imgu_sd->subdev.ctrl_handler = hdl;
> >> - imgu_sd->ctrl = v4l2_ctrl_new_custom(hdl, &imgu_subdev_ctrl_mode, NULL);
> >> - if (hdl->error) {
> >> - r = hdl->error;
> >> - dev_err(&imgu->pci_dev->dev,
> >> - "failed to create subdev v4l2 ctrl with err %d", r);
> >> - goto fail_subdev;
> >> - }
> >> + imgu_sd->running_mode =
> >> + pipe ? IPU3_RUNNING_MODE_STILL : IPU3_RUNNING_MODE_VIDEO;
> >> r = v4l2_device_register_subdev(&imgu->v4l2_dev, &imgu_sd->subdev);
> >> if (r) {
> >> dev_err(&imgu->pci_dev->dev,
> >> @@ -1141,7 +1085,6 @@ static int imgu_v4l2_subdev_register(struct imgu_device *imgu,
> >> return 0;
> >>
> >> fail_subdev:
> >> - v4l2_ctrl_handler_free(imgu_sd->subdev.ctrl_handler);
> >> media_entity_cleanup(&imgu_sd->subdev.entity);
> >>
> >> return r;
> >> @@ -1236,8 +1179,8 @@ static int imgu_v4l2_node_setup(struct imgu_device *imgu, unsigned int pipe,
> >> }
> >>
> >> /* Initialize vdev */
> >> - snprintf(vdev->name, sizeof(vdev->name), "%s %u %s",
> >> - IMGU_NAME, pipe, node->name);
> >> + snprintf(vdev->name, sizeof(vdev->name), "%s %s %s",
> >> + IMGU_NAME, pipe ? "still" : "video", node->name);
> >> vdev->release = video_device_release_empty;
> >> vdev->fops = &imgu_v4l2_fops;
> >> vdev->lock = &node->lock;
> >> @@ -1307,7 +1250,6 @@ static void imgu_v4l2_subdev_cleanup(struct imgu_device *imgu, unsigned int i)
> >> struct imgu_media_pipe *imgu_pipe = &imgu->imgu_pipe[i];
> >>
> >> v4l2_device_unregister_subdev(&imgu_pipe->imgu_sd.subdev);
> >> - v4l2_ctrl_handler_free(imgu_pipe->imgu_sd.subdev.ctrl_handler);
> >> media_entity_cleanup(&imgu_pipe->imgu_sd.subdev.entity);
> >> }
> >>
> >> diff --git a/drivers/staging/media/ipu3/ipu3.h b/drivers/staging/media/ipu3/ipu3.h
> >> index 73b123b2b8a2..de02a244732e 100644
> >> --- a/drivers/staging/media/ipu3/ipu3.h
> >> +++ b/drivers/staging/media/ipu3/ipu3.h
> >> @@ -7,7 +7,6 @@
> >> #include <linux/iova.h>
> >> #include <linux/pci.h>
> >>
> >> -#include <media/v4l2-ctrls.h>
> >> #include <media/v4l2-device.h>
> >> #include <media/videobuf2-dma-sg.h>
> >>
> >> @@ -96,9 +95,7 @@ struct imgu_v4l2_subdev {
> >> struct v4l2_rect bds; /* bayer-domain scaled resolution*/
> >> struct v4l2_rect gdc; /* gdc output resolution */
> >> } rect;
> >> - struct v4l2_ctrl_handler ctrl_handler;
> >> - struct v4l2_ctrl *ctrl;
> >> - atomic_t running_mode;
> >> + unsigned int running_mode;
> >> bool active;
> >> };
> >>
> >> --
> >> 2.7.4
> >>
> >
