| From 3bb2173f582e52b15ed1529d1d08d723b39ca8b2 Mon Sep 17 00:00:00 2001 |
| From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> |
| Date: Wed, 7 Sep 2016 08:58:49 -0300 |
| Subject: [PATCH 208/286] [media] v4l: vsp1: Add histogram support |
| |
| The histogram common code will be used to implement support for both the |
| HGO and HGT histogram computation engines. |
| |
| Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> |
| Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> |
| (cherry picked from commit 99362e32332b5ce591a67a632073668754f28b0d) |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| --- |
| drivers/media/platform/Kconfig | 1 |
| drivers/media/platform/vsp1/Makefile | 1 |
| drivers/media/platform/vsp1/vsp1_histo.c | 646 +++++++++++++++++++++++++++++++ |
| drivers/media/platform/vsp1/vsp1_histo.h | 84 ++++ |
| 4 files changed, 732 insertions(+) |
| create mode 100644 drivers/media/platform/vsp1/vsp1_histo.c |
| create mode 100644 drivers/media/platform/vsp1/vsp1_histo.h |
| |
| --- a/drivers/media/platform/Kconfig |
| +++ b/drivers/media/platform/Kconfig |
| @@ -334,6 +334,7 @@ config VIDEO_RENESAS_VSP1 |
| depends on (ARCH_RENESAS && OF) || COMPILE_TEST |
| depends on (!ARM64 && !VIDEO_RENESAS_FCP) || VIDEO_RENESAS_FCP |
| select VIDEOBUF2_DMA_CONTIG |
| + select VIDEOBUF2_VMALLOC |
| ---help--- |
| This is a V4L2 driver for the Renesas VSP1 video processing engine. |
| |
| --- a/drivers/media/platform/vsp1/Makefile |
| +++ b/drivers/media/platform/vsp1/Makefile |
| @@ -3,6 +3,7 @@ vsp1-y += vsp1_dl.o vsp1_drm.o vsp1_ |
| vsp1-y += vsp1_rpf.o vsp1_rwpf.o vsp1_wpf.o |
| vsp1-y += vsp1_clu.o vsp1_hsit.o vsp1_lut.o |
| vsp1-y += vsp1_bru.o vsp1_sru.o vsp1_uds.o |
| +vsp1-y += vsp1_histo.o |
| vsp1-y += vsp1_lif.o |
| |
| obj-$(CONFIG_VIDEO_RENESAS_VSP1) += vsp1.o |
| --- /dev/null |
| +++ b/drivers/media/platform/vsp1/vsp1_histo.c |
| @@ -0,0 +1,646 @@ |
| +/* |
| + * vsp1_histo.c -- R-Car VSP1 Histogram API |
| + * |
| + * Copyright (C) 2016 Renesas Electronics Corporation |
| + * Copyright (C) 2016 Laurent Pinchart |
| + * |
| + * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) |
| + * |
| + * This program is free software; you can redistribute it and/or modify |
| + * it under the terms of the GNU General Public License as published by |
| + * the Free Software Foundation; either version 2 of the License, or |
| + * (at your option) any later version. |
| + */ |
| + |
| +#include <linux/device.h> |
| +#include <linux/gfp.h> |
| + |
| +#include <media/v4l2-ioctl.h> |
| +#include <media/v4l2-subdev.h> |
| +#include <media/videobuf2-vmalloc.h> |
| + |
| +#include "vsp1.h" |
| +#include "vsp1_histo.h" |
| +#include "vsp1_pipe.h" |
| + |
| +#define HISTO_MIN_SIZE 4U |
| +#define HISTO_MAX_SIZE 8192U |
| + |
| +/* ----------------------------------------------------------------------------- |
| + * Buffer Operations |
| + */ |
| + |
| +static inline struct vsp1_histogram_buffer * |
| +to_vsp1_histogram_buffer(struct vb2_v4l2_buffer *vbuf) |
| +{ |
| + return container_of(vbuf, struct vsp1_histogram_buffer, buf); |
| +} |
| + |
| +struct vsp1_histogram_buffer * |
| +vsp1_histogram_buffer_get(struct vsp1_histogram *histo) |
| +{ |
| + struct vsp1_histogram_buffer *buf = NULL; |
| + unsigned long flags; |
| + |
| + spin_lock_irqsave(&histo->irqlock, flags); |
| + |
| + if (list_empty(&histo->irqqueue)) |
| + goto done; |
| + |
| + buf = list_first_entry(&histo->irqqueue, struct vsp1_histogram_buffer, |
| + queue); |
| + list_del(&buf->queue); |
| + histo->readout = true; |
| + |
| +done: |
| + spin_unlock_irqrestore(&histo->irqlock, flags); |
| + return buf; |
| +} |
| + |
| +void vsp1_histogram_buffer_complete(struct vsp1_histogram *histo, |
| + struct vsp1_histogram_buffer *buf, |
| + size_t size) |
| +{ |
| + struct vsp1_pipeline *pipe = histo->pipe; |
| + unsigned long flags; |
| + |
| + /* |
| + * The pipeline pointer is guaranteed to be valid as this function is |
| + * called from the frame completion interrupt handler, which can only |
| + * occur when video streaming is active. |
| + */ |
| + buf->buf.sequence = pipe->sequence; |
| + buf->buf.vb2_buf.timestamp = ktime_get_ns(); |
| + vb2_set_plane_payload(&buf->buf.vb2_buf, 0, size); |
| + vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_DONE); |
| + |
| + spin_lock_irqsave(&histo->irqlock, flags); |
| + histo->readout = false; |
| + wake_up(&histo->wait_queue); |
| + spin_unlock_irqrestore(&histo->irqlock, flags); |
| +} |
| + |
| +/* ----------------------------------------------------------------------------- |
| + * videobuf2 Queue Operations |
| + */ |
| + |
| +static int histo_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, |
| + unsigned int *nplanes, unsigned int sizes[], |
| + struct device *alloc_devs[]) |
| +{ |
| + struct vsp1_histogram *histo = vb2_get_drv_priv(vq); |
| + |
| + if (*nplanes) { |
| + if (*nplanes != 1) |
| + return -EINVAL; |
| + |
| + if (sizes[0] < histo->data_size) |
| + return -EINVAL; |
| + |
| + return 0; |
| + } |
| + |
| + *nplanes = 1; |
| + sizes[0] = histo->data_size; |
| + |
| + return 0; |
| +} |
| + |
| +static int histo_buffer_prepare(struct vb2_buffer *vb) |
| +{ |
| + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| + struct vsp1_histogram *histo = vb2_get_drv_priv(vb->vb2_queue); |
| + struct vsp1_histogram_buffer *buf = to_vsp1_histogram_buffer(vbuf); |
| + |
| + if (vb->num_planes != 1) |
| + return -EINVAL; |
| + |
| + if (vb2_plane_size(vb, 0) < histo->data_size) |
| + return -EINVAL; |
| + |
| + buf->addr = vb2_plane_vaddr(vb, 0); |
| + |
| + return 0; |
| +} |
| + |
| +static void histo_buffer_queue(struct vb2_buffer *vb) |
| +{ |
| + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| + struct vsp1_histogram *histo = vb2_get_drv_priv(vb->vb2_queue); |
| + struct vsp1_histogram_buffer *buf = to_vsp1_histogram_buffer(vbuf); |
| + unsigned long flags; |
| + |
| + spin_lock_irqsave(&histo->irqlock, flags); |
| + list_add_tail(&buf->queue, &histo->irqqueue); |
| + spin_unlock_irqrestore(&histo->irqlock, flags); |
| +} |
| + |
| +static int histo_start_streaming(struct vb2_queue *vq, unsigned int count) |
| +{ |
| + return 0; |
| +} |
| + |
| +static void histo_stop_streaming(struct vb2_queue *vq) |
| +{ |
| + struct vsp1_histogram *histo = vb2_get_drv_priv(vq); |
| + struct vsp1_histogram_buffer *buffer; |
| + unsigned long flags; |
| + |
| + spin_lock_irqsave(&histo->irqlock, flags); |
| + |
| + /* Remove all buffers from the IRQ queue. */ |
| + list_for_each_entry(buffer, &histo->irqqueue, queue) |
| + vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR); |
| + INIT_LIST_HEAD(&histo->irqqueue); |
| + |
| + /* Wait for the buffer being read out (if any) to complete. */ |
| + wait_event_lock_irq(histo->wait_queue, !histo->readout, histo->irqlock); |
| + |
| + spin_unlock_irqrestore(&histo->irqlock, flags); |
| +} |
| + |
| +static const struct vb2_ops histo_video_queue_qops = { |
| + .queue_setup = histo_queue_setup, |
| + .buf_prepare = histo_buffer_prepare, |
| + .buf_queue = histo_buffer_queue, |
| + .wait_prepare = vb2_ops_wait_prepare, |
| + .wait_finish = vb2_ops_wait_finish, |
| + .start_streaming = histo_start_streaming, |
| + .stop_streaming = histo_stop_streaming, |
| +}; |
| + |
| +/* ----------------------------------------------------------------------------- |
| + * V4L2 Subdevice Operations |
| + */ |
| + |
| +static int histo_enum_mbus_code(struct v4l2_subdev *subdev, |
| + struct v4l2_subdev_pad_config *cfg, |
| + struct v4l2_subdev_mbus_code_enum *code) |
| +{ |
| + struct vsp1_histogram *histo = subdev_to_histo(subdev); |
| + |
| + if (code->pad == HISTO_PAD_SOURCE) { |
| + code->code = MEDIA_BUS_FMT_FIXED; |
| + return 0; |
| + } |
| + |
| + return vsp1_subdev_enum_mbus_code(subdev, cfg, code, histo->formats, |
| + histo->num_formats); |
| +} |
| + |
| +static int histo_enum_frame_size(struct v4l2_subdev *subdev, |
| + struct v4l2_subdev_pad_config *cfg, |
| + struct v4l2_subdev_frame_size_enum *fse) |
| +{ |
| + if (fse->pad != HISTO_PAD_SINK) |
| + return -EINVAL; |
| + |
| + return vsp1_subdev_enum_frame_size(subdev, cfg, fse, HISTO_MIN_SIZE, |
| + HISTO_MIN_SIZE, HISTO_MAX_SIZE, |
| + HISTO_MAX_SIZE); |
| +} |
| + |
| +static int histo_get_selection(struct v4l2_subdev *subdev, |
| + struct v4l2_subdev_pad_config *cfg, |
| + struct v4l2_subdev_selection *sel) |
| +{ |
| + struct vsp1_histogram *histo = subdev_to_histo(subdev); |
| + struct v4l2_subdev_pad_config *config; |
| + struct v4l2_mbus_framefmt *format; |
| + struct v4l2_rect *crop; |
| + int ret = 0; |
| + |
| + if (sel->pad != HISTO_PAD_SINK) |
| + return -EINVAL; |
| + |
| + mutex_lock(&histo->entity.lock); |
| + |
| + config = vsp1_entity_get_pad_config(&histo->entity, cfg, sel->which); |
| + if (!config) { |
| + ret = -EINVAL; |
| + goto done; |
| + } |
| + |
| + switch (sel->target) { |
| + case V4L2_SEL_TGT_COMPOSE_BOUNDS: |
| + case V4L2_SEL_TGT_COMPOSE_DEFAULT: |
| + crop = vsp1_entity_get_pad_selection(&histo->entity, config, |
| + HISTO_PAD_SINK, |
| + V4L2_SEL_TGT_CROP); |
| + sel->r.left = 0; |
| + sel->r.top = 0; |
| + sel->r.width = crop->width; |
| + sel->r.height = crop->height; |
| + break; |
| + |
| + case V4L2_SEL_TGT_CROP_BOUNDS: |
| + case V4L2_SEL_TGT_CROP_DEFAULT: |
| + format = vsp1_entity_get_pad_format(&histo->entity, config, |
| + HISTO_PAD_SINK); |
| + sel->r.left = 0; |
| + sel->r.top = 0; |
| + sel->r.width = format->width; |
| + sel->r.height = format->height; |
| + break; |
| + |
| + case V4L2_SEL_TGT_COMPOSE: |
| + case V4L2_SEL_TGT_CROP: |
| + sel->r = *vsp1_entity_get_pad_selection(&histo->entity, config, |
| + sel->pad, sel->target); |
| + break; |
| + |
| + default: |
| + ret = -EINVAL; |
| + break; |
| + } |
| + |
| +done: |
| + mutex_unlock(&histo->entity.lock); |
| + return ret; |
| +} |
| + |
| +static int histo_set_crop(struct v4l2_subdev *subdev, |
| + struct v4l2_subdev_pad_config *config, |
| + struct v4l2_subdev_selection *sel) |
| +{ |
| + struct vsp1_histogram *histo = subdev_to_histo(subdev); |
| + struct v4l2_mbus_framefmt *format; |
| + struct v4l2_rect *selection; |
| + |
| + /* The crop rectangle must be inside the input frame. */ |
| + format = vsp1_entity_get_pad_format(&histo->entity, config, |
| + HISTO_PAD_SINK); |
| + sel->r.left = clamp_t(unsigned int, sel->r.left, 0, format->width - 1); |
| + sel->r.top = clamp_t(unsigned int, sel->r.top, 0, format->height - 1); |
| + sel->r.width = clamp_t(unsigned int, sel->r.width, HISTO_MIN_SIZE, |
| + format->width - sel->r.left); |
| + sel->r.height = clamp_t(unsigned int, sel->r.height, HISTO_MIN_SIZE, |
| + format->height - sel->r.top); |
| + |
| + /* Set the crop rectangle and reset the compose rectangle. */ |
| + selection = vsp1_entity_get_pad_selection(&histo->entity, config, |
| + sel->pad, V4L2_SEL_TGT_CROP); |
| + *selection = sel->r; |
| + |
| + selection = vsp1_entity_get_pad_selection(&histo->entity, config, |
| + sel->pad, |
| + V4L2_SEL_TGT_COMPOSE); |
| + *selection = sel->r; |
| + |
| + return 0; |
| +} |
| + |
| +static int histo_set_compose(struct v4l2_subdev *subdev, |
| + struct v4l2_subdev_pad_config *config, |
| + struct v4l2_subdev_selection *sel) |
| +{ |
| + struct vsp1_histogram *histo = subdev_to_histo(subdev); |
| + struct v4l2_rect *compose; |
| + struct v4l2_rect *crop; |
| + unsigned int ratio; |
| + |
| + /* |
| + * The compose rectangle is used to configure downscaling, the top left |
| + * corner is fixed to (0,0) and the size to 1/2 or 1/4 of the crop |
| + * rectangle. |
| + */ |
| + sel->r.left = 0; |
| + sel->r.top = 0; |
| + |
| + crop = vsp1_entity_get_pad_selection(&histo->entity, config, sel->pad, |
| + V4L2_SEL_TGT_CROP); |
| + |
| + /* |
| + * Clamp the width and height to acceptable values first and then |
| + * compute the closest rounded dividing ratio. |
| + * |
| + * Ratio Rounded ratio |
| + * -------------------------- |
| + * [1.0 1.5[ 1 |
| + * [1.5 3.0[ 2 |
| + * [3.0 4.0] 4 |
| + * |
| + * The rounded ratio can be computed using |
| + * |
| + * 1 << (ceil(ratio * 2) / 3) |
| + */ |
| + sel->r.width = clamp(sel->r.width, crop->width / 4, crop->width); |
| + ratio = 1 << (crop->width * 2 / sel->r.width / 3); |
| + sel->r.width = crop->width / ratio; |
| + |
| + |
| + sel->r.height = clamp(sel->r.height, crop->height / 4, crop->height); |
| + ratio = 1 << (crop->height * 2 / sel->r.height / 3); |
| + sel->r.height = crop->height / ratio; |
| + |
| + compose = vsp1_entity_get_pad_selection(&histo->entity, config, |
| + sel->pad, |
| + V4L2_SEL_TGT_COMPOSE); |
| + *compose = sel->r; |
| + |
| + return 0; |
| +} |
| + |
| +static int histo_set_selection(struct v4l2_subdev *subdev, |
| + struct v4l2_subdev_pad_config *cfg, |
| + struct v4l2_subdev_selection *sel) |
| +{ |
| + struct vsp1_histogram *histo = subdev_to_histo(subdev); |
| + struct v4l2_subdev_pad_config *config; |
| + int ret; |
| + |
| + if (sel->pad != HISTO_PAD_SINK) |
| + return -EINVAL; |
| + |
| + mutex_lock(&histo->entity.lock); |
| + |
| + config = vsp1_entity_get_pad_config(&histo->entity, cfg, sel->which); |
| + if (!config) { |
| + ret = -EINVAL; |
| + goto done; |
| + } |
| + |
| + if (sel->target == V4L2_SEL_TGT_CROP) |
| + ret = histo_set_crop(subdev, config, sel); |
| + else if (sel->target == V4L2_SEL_TGT_COMPOSE) |
| + ret = histo_set_compose(subdev, config, sel); |
| + else |
| + ret = -EINVAL; |
| + |
| +done: |
| + mutex_unlock(&histo->entity.lock); |
| + return ret; |
| +} |
| + |
| +static int histo_get_format(struct v4l2_subdev *subdev, |
| + struct v4l2_subdev_pad_config *cfg, |
| + struct v4l2_subdev_format *fmt) |
| +{ |
| + if (fmt->pad == HISTO_PAD_SOURCE) { |
| + fmt->format.code = MEDIA_BUS_FMT_FIXED; |
| + fmt->format.width = 0; |
| + fmt->format.height = 0; |
| + fmt->format.field = V4L2_FIELD_NONE; |
| + fmt->format.colorspace = V4L2_COLORSPACE_RAW; |
| + return 0; |
| + } |
| + |
| + return vsp1_subdev_get_pad_format(subdev, cfg, fmt); |
| +} |
| + |
| +static int histo_set_format(struct v4l2_subdev *subdev, |
| + struct v4l2_subdev_pad_config *cfg, |
| + struct v4l2_subdev_format *fmt) |
| +{ |
| + struct vsp1_histogram *histo = subdev_to_histo(subdev); |
| + struct v4l2_subdev_pad_config *config; |
| + struct v4l2_mbus_framefmt *format; |
| + struct v4l2_rect *selection; |
| + unsigned int i; |
| + int ret = 0; |
| + |
| + if (fmt->pad != HISTO_PAD_SINK) |
| + return histo_get_format(subdev, cfg, fmt); |
| + |
| + mutex_lock(&histo->entity.lock); |
| + |
| + config = vsp1_entity_get_pad_config(&histo->entity, cfg, fmt->which); |
| + if (!config) { |
| + ret = -EINVAL; |
| + goto done; |
| + } |
| + |
| + /* |
| + * Default to the first format if the requested format is not |
| + * supported. |
| + */ |
| + for (i = 0; i < histo->num_formats; ++i) { |
| + if (fmt->format.code == histo->formats[i]) |
| + break; |
| + } |
| + if (i == histo->num_formats) |
| + fmt->format.code = histo->formats[0]; |
| + |
| + format = vsp1_entity_get_pad_format(&histo->entity, config, fmt->pad); |
| + |
| + format->code = fmt->format.code; |
| + format->width = clamp_t(unsigned int, fmt->format.width, |
| + HISTO_MIN_SIZE, HISTO_MAX_SIZE); |
| + format->height = clamp_t(unsigned int, fmt->format.height, |
| + HISTO_MIN_SIZE, HISTO_MAX_SIZE); |
| + format->field = V4L2_FIELD_NONE; |
| + format->colorspace = V4L2_COLORSPACE_SRGB; |
| + |
| + fmt->format = *format; |
| + |
| + /* Reset the crop and compose rectangles */ |
| + selection = vsp1_entity_get_pad_selection(&histo->entity, config, |
| + fmt->pad, V4L2_SEL_TGT_CROP); |
| + selection->left = 0; |
| + selection->top = 0; |
| + selection->width = format->width; |
| + selection->height = format->height; |
| + |
| + selection = vsp1_entity_get_pad_selection(&histo->entity, config, |
| + fmt->pad, |
| + V4L2_SEL_TGT_COMPOSE); |
| + selection->left = 0; |
| + selection->top = 0; |
| + selection->width = format->width; |
| + selection->height = format->height; |
| + |
| +done: |
| + mutex_unlock(&histo->entity.lock); |
| + return ret; |
| +} |
| + |
| +static const struct v4l2_subdev_pad_ops histo_pad_ops = { |
| + .enum_mbus_code = histo_enum_mbus_code, |
| + .enum_frame_size = histo_enum_frame_size, |
| + .get_fmt = histo_get_format, |
| + .set_fmt = histo_set_format, |
| + .get_selection = histo_get_selection, |
| + .set_selection = histo_set_selection, |
| +}; |
| + |
| +static const struct v4l2_subdev_ops histo_ops = { |
| + .pad = &histo_pad_ops, |
| +}; |
| + |
| +/* ----------------------------------------------------------------------------- |
| + * V4L2 ioctls |
| + */ |
| + |
| +static int histo_v4l2_querycap(struct file *file, void *fh, |
| + struct v4l2_capability *cap) |
| +{ |
| + struct v4l2_fh *vfh = file->private_data; |
| + struct vsp1_histogram *histo = vdev_to_histo(vfh->vdev); |
| + |
| + cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING |
| + | V4L2_CAP_VIDEO_CAPTURE_MPLANE |
| + | V4L2_CAP_VIDEO_OUTPUT_MPLANE |
| + | V4L2_CAP_META_CAPTURE; |
| + cap->device_caps = V4L2_CAP_META_CAPTURE |
| + | V4L2_CAP_STREAMING; |
| + |
| + strlcpy(cap->driver, "vsp1", sizeof(cap->driver)); |
| + strlcpy(cap->card, histo->video.name, sizeof(cap->card)); |
| + snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", |
| + dev_name(histo->entity.vsp1->dev)); |
| + |
| + return 0; |
| +} |
| + |
| +static int histo_v4l2_enum_format(struct file *file, void *fh, |
| + struct v4l2_fmtdesc *f) |
| +{ |
| + struct v4l2_fh *vfh = file->private_data; |
| + struct vsp1_histogram *histo = vdev_to_histo(vfh->vdev); |
| + |
| + if (f->index > 0 || f->type != histo->queue.type) |
| + return -EINVAL; |
| + |
| + f->pixelformat = histo->meta_format; |
| + |
| + return 0; |
| +} |
| + |
| +static int histo_v4l2_get_format(struct file *file, void *fh, |
| + struct v4l2_format *format) |
| +{ |
| + struct v4l2_fh *vfh = file->private_data; |
| + struct vsp1_histogram *histo = vdev_to_histo(vfh->vdev); |
| + struct v4l2_meta_format *meta = &format->fmt.meta; |
| + |
| + if (format->type != histo->queue.type) |
| + return -EINVAL; |
| + |
| + memset(meta, 0, sizeof(*meta)); |
| + |
| + meta->dataformat = histo->meta_format; |
| + meta->buffersize = histo->data_size; |
| + |
| + return 0; |
| +} |
| + |
| +static const struct v4l2_ioctl_ops histo_v4l2_ioctl_ops = { |
| + .vidioc_querycap = histo_v4l2_querycap, |
| + .vidioc_enum_fmt_meta_cap = histo_v4l2_enum_format, |
| + .vidioc_g_fmt_meta_cap = histo_v4l2_get_format, |
| + .vidioc_s_fmt_meta_cap = histo_v4l2_get_format, |
| + .vidioc_try_fmt_meta_cap = histo_v4l2_get_format, |
| + .vidioc_reqbufs = vb2_ioctl_reqbufs, |
| + .vidioc_querybuf = vb2_ioctl_querybuf, |
| + .vidioc_qbuf = vb2_ioctl_qbuf, |
| + .vidioc_dqbuf = vb2_ioctl_dqbuf, |
| + .vidioc_create_bufs = vb2_ioctl_create_bufs, |
| + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, |
| + .vidioc_streamon = vb2_ioctl_streamon, |
| + .vidioc_streamoff = vb2_ioctl_streamoff, |
| +}; |
| + |
| +/* ----------------------------------------------------------------------------- |
| + * V4L2 File Operations |
| + */ |
| + |
| +static const struct v4l2_file_operations histo_v4l2_fops = { |
| + .owner = THIS_MODULE, |
| + .unlocked_ioctl = video_ioctl2, |
| + .open = v4l2_fh_open, |
| + .release = vb2_fop_release, |
| + .poll = vb2_fop_poll, |
| + .mmap = vb2_fop_mmap, |
| +}; |
| + |
| +static void vsp1_histogram_cleanup(struct vsp1_histogram *histo) |
| +{ |
| + if (video_is_registered(&histo->video)) |
| + video_unregister_device(&histo->video); |
| + |
| + media_entity_cleanup(&histo->video.entity); |
| +} |
| + |
| +void vsp1_histogram_destroy(struct vsp1_entity *entity) |
| +{ |
| + struct vsp1_histogram *histo = subdev_to_histo(&entity->subdev); |
| + |
| + vsp1_histogram_cleanup(histo); |
| +} |
| + |
| +int vsp1_histogram_init(struct vsp1_device *vsp1, struct vsp1_histogram *histo, |
| + enum vsp1_entity_type type, const char *name, |
| + const struct vsp1_entity_operations *ops, |
| + const unsigned int *formats, unsigned int num_formats, |
| + size_t data_size, u32 meta_format) |
| +{ |
| + int ret; |
| + |
| + histo->formats = formats; |
| + histo->num_formats = num_formats; |
| + histo->data_size = data_size; |
| + histo->meta_format = meta_format; |
| + |
| + histo->pad.flags = MEDIA_PAD_FL_SINK; |
| + histo->video.vfl_dir = VFL_DIR_RX; |
| + |
| + mutex_init(&histo->lock); |
| + spin_lock_init(&histo->irqlock); |
| + INIT_LIST_HEAD(&histo->irqqueue); |
| + init_waitqueue_head(&histo->wait_queue); |
| + |
| + /* Initialize the VSP entity... */ |
| + histo->entity.ops = ops; |
| + histo->entity.type = type; |
| + |
| + ret = vsp1_entity_init(vsp1, &histo->entity, name, 2, &histo_ops, |
| + MEDIA_ENT_F_PROC_VIDEO_STATISTICS); |
| + if (ret < 0) |
| + return ret; |
| + |
| + /* ... and the media entity... */ |
| + ret = media_entity_pads_init(&histo->video.entity, 1, &histo->pad); |
| + if (ret < 0) |
| + return ret; |
| + |
| + /* ... and the video node... */ |
| + histo->video.v4l2_dev = &vsp1->v4l2_dev; |
| + histo->video.fops = &histo_v4l2_fops; |
| + snprintf(histo->video.name, sizeof(histo->video.name), |
| + "%s histo", histo->entity.subdev.name); |
| + histo->video.vfl_type = VFL_TYPE_GRABBER; |
| + histo->video.release = video_device_release_empty; |
| + histo->video.ioctl_ops = &histo_v4l2_ioctl_ops; |
| + |
| + video_set_drvdata(&histo->video, histo); |
| + |
| + /* ... and the buffers queue... */ |
| + histo->queue.type = V4L2_BUF_TYPE_META_CAPTURE; |
| + histo->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; |
| + histo->queue.lock = &histo->lock; |
| + histo->queue.drv_priv = histo; |
| + histo->queue.buf_struct_size = sizeof(struct vsp1_histogram_buffer); |
| + histo->queue.ops = &histo_video_queue_qops; |
| + histo->queue.mem_ops = &vb2_vmalloc_memops; |
| + histo->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; |
| + histo->queue.dev = vsp1->dev; |
| + ret = vb2_queue_init(&histo->queue); |
| + if (ret < 0) { |
| + dev_err(vsp1->dev, "failed to initialize vb2 queue\n"); |
| + goto error; |
| + } |
| + |
| + /* ... and register the video device. */ |
| + histo->video.queue = &histo->queue; |
| + ret = video_register_device(&histo->video, VFL_TYPE_GRABBER, -1); |
| + if (ret < 0) { |
| + dev_err(vsp1->dev, "failed to register video device\n"); |
| + goto error; |
| + } |
| + |
| + return 0; |
| + |
| +error: |
| + vsp1_histogram_cleanup(histo); |
| + return ret; |
| +} |
| --- /dev/null |
| +++ b/drivers/media/platform/vsp1/vsp1_histo.h |
| @@ -0,0 +1,84 @@ |
| +/* |
| + * vsp1_histo.h -- R-Car VSP1 Histogram API |
| + * |
| + * Copyright (C) 2016 Renesas Electronics Corporation |
| + * Copyright (C) 2016 Laurent Pinchart |
| + * |
| + * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) |
| + * |
| + * This program is free software; you can redistribute it and/or modify |
| + * it under the terms of the GNU General Public License as published by |
| + * the Free Software Foundation; either version 2 of the License, or |
| + * (at your option) any later version. |
| + */ |
| +#ifndef __VSP1_HISTO_H__ |
| +#define __VSP1_HISTO_H__ |
| + |
| +#include <linux/list.h> |
| +#include <linux/mutex.h> |
| +#include <linux/spinlock.h> |
| + |
| +#include <media/media-entity.h> |
| +#include <media/v4l2-dev.h> |
| +#include <media/videobuf2-v4l2.h> |
| + |
| +#include "vsp1_entity.h" |
| + |
| +struct vsp1_device; |
| +struct vsp1_pipeline; |
| + |
| +#define HISTO_PAD_SINK 0 |
| +#define HISTO_PAD_SOURCE 1 |
| + |
| +struct vsp1_histogram_buffer { |
| + struct vb2_v4l2_buffer buf; |
| + struct list_head queue; |
| + void *addr; |
| +}; |
| + |
| +struct vsp1_histogram { |
| + struct vsp1_pipeline *pipe; |
| + |
| + struct vsp1_entity entity; |
| + struct video_device video; |
| + struct media_pad pad; |
| + |
| + const u32 *formats; |
| + unsigned int num_formats; |
| + size_t data_size; |
| + u32 meta_format; |
| + |
| + struct mutex lock; |
| + struct vb2_queue queue; |
| + |
| + spinlock_t irqlock; |
| + struct list_head irqqueue; |
| + |
| + wait_queue_head_t wait_queue; |
| + bool readout; |
| +}; |
| + |
| +static inline struct vsp1_histogram *vdev_to_histo(struct video_device *vdev) |
| +{ |
| + return container_of(vdev, struct vsp1_histogram, video); |
| +} |
| + |
| +static inline struct vsp1_histogram *subdev_to_histo(struct v4l2_subdev *subdev) |
| +{ |
| + return container_of(subdev, struct vsp1_histogram, entity.subdev); |
| +} |
| + |
| +int vsp1_histogram_init(struct vsp1_device *vsp1, struct vsp1_histogram *histo, |
| + enum vsp1_entity_type type, const char *name, |
| + const struct vsp1_entity_operations *ops, |
| + const unsigned int *formats, unsigned int num_formats, |
| + size_t data_size, u32 meta_format); |
| +void vsp1_histogram_destroy(struct vsp1_entity *entity); |
| + |
| +struct vsp1_histogram_buffer * |
| +vsp1_histogram_buffer_get(struct vsp1_histogram *histo); |
| +void vsp1_histogram_buffer_complete(struct vsp1_histogram *histo, |
| + struct vsp1_histogram_buffer *buf, |
| + size_t size); |
| + |
| +#endif /* __VSP1_HISTO_H__ */ |