[PATCH v6 06/17] media: rkisp1: add ISP1 statistics driver

Jacob Chen
2018-03-08T09:47:56Z

From: Jacob Chen <jacob2.chen@rock-chips.com>

Add the capture video driver for rockchip isp1 statistics block.

Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com>
Signed-off-by: Yichong Zhong <zyc@rock-chips.com>
Signed-off-by: Jacob Chen <cc@rock-chips.com>
Signed-off-by: Eddie Cai <eddie.cai.linux@gmail.com>
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Allon Huang <allon.huang@rock-chips.com>
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
---
drivers/media/platform/rockchip/isp1/isp_stats.c | 508 +++++++++++++++++++++++
drivers/media/platform/rockchip/isp1/isp_stats.h | 58 +++
2 files changed, 566 insertions(+)
create mode 100644 drivers/media/platform/rockchip/isp1/isp_stats.c
create mode 100644 drivers/media/platform/rockchip/isp1/isp_stats.h

diff --git a/drivers/media/platform/rockchip/isp1/isp_stats.c b/drivers/media/platform/rockchip/isp1/isp_stats.c
new file mode 100644
index 000000000000..3ba86ccbc42d
--- /dev/null
+++ b/drivers/media/platform/rockchip/isp1/isp_stats.c
@@ -0,0 +1,508 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Rockchip isp1 driver
+ *
+ * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
+ */
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-core.h>
+#include <media/videobuf2-vmalloc.h> /* for ISP statistics */
+#include "dev.h"
+#include "regs.h"
+
+#define RKISP1_ISP_STATS_REQ_BUFS_MIN 2
+#define RKISP1_ISP_STATS_REQ_BUFS_MAX 8
+
+static int rkisp1_stats_enum_fmt_meta_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct video_device *video = video_devdata(file);
+ struct rkisp1_isp_stats_vdev *stats_vdev = video_get_drvdata(video);
+
+ if (f->index > 0 || f->type != video->queue->type)
+ return -EINVAL;
+
+ f->pixelformat = stats_vdev->vdev_fmt.fmt.meta.dataformat;
+ return 0;
+}
+
+static int rkisp1_stats_g_fmt_meta_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct video_device *video = video_devdata(file);
+ struct rkisp1_isp_stats_vdev *stats_vdev = video_get_drvdata(video);
+ struct v4l2_meta_format *meta = &f->fmt.meta;
+
+ if (f->type != video->queue->type)
+ return -EINVAL;
+
+ memset(meta, 0, sizeof(*meta));
+ meta->dataformat = stats_vdev->vdev_fmt.fmt.meta.dataformat;
+ meta->buffersize = stats_vdev->vdev_fmt.fmt.meta.buffersize;
+
+ return 0;
+}
+
+static int rkisp1_stats_querycap(struct file *file,
+ void *priv, struct v4l2_capability *cap)
+{
+ struct video_device *vdev = video_devdata(file);
+
+ strlcpy(cap->driver, DRIVER_NAME, sizeof(cap->driver));
+ strlcpy(cap->card, vdev->name, sizeof(cap->card));
+ strlcpy(cap->bus_info, "platform: " DRIVER_NAME, sizeof(cap->bus_info));
+
+ return 0;
+}
+
+/* ISP video device IOCTLs */
+static const struct v4l2_ioctl_ops rkisp1_stats_ioctl = {
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+ .vidioc_enum_fmt_meta_cap = rkisp1_stats_enum_fmt_meta_cap,
+ .vidioc_g_fmt_meta_cap = rkisp1_stats_g_fmt_meta_cap,
+ .vidioc_s_fmt_meta_cap = rkisp1_stats_g_fmt_meta_cap,
+ .vidioc_try_fmt_meta_cap = rkisp1_stats_g_fmt_meta_cap,
+ .vidioc_querycap = rkisp1_stats_querycap,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+struct v4l2_file_operations rkisp1_stats_fops = {
+ .mmap = vb2_fop_mmap,
+ .unlocked_ioctl = video_ioctl2,
+ .poll = vb2_fop_poll,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release
+};
+
+static int rkisp1_stats_vb2_queue_setup(struct vb2_queue *vq,
+ unsigned int *num_buffers,
+ unsigned int *num_planes,
+ unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct rkisp1_isp_stats_vdev *stats_vdev = vq->drv_priv;
+
+ *num_planes = 1;
+
+ *num_buffers = clamp_t(u32, *num_buffers, RKISP1_ISP_STATS_REQ_BUFS_MIN,
+ RKISP1_ISP_STATS_REQ_BUFS_MAX);
+
+ sizes[0] = sizeof(struct rkisp1_stat_buffer);
+
+ INIT_LIST_HEAD(&stats_vdev->stat);
+
+ return 0;
+}
+
+static void rkisp1_stats_vb2_buf_queue(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct rkisp1_buffer *stats_buf = to_rkisp1_buffer(vbuf);
+ struct vb2_queue *vq = vb->vb2_queue;
+ struct rkisp1_isp_stats_vdev *stats_dev = vq->drv_priv;
+ unsigned long flags;
+
+ stats_buf->vaddr[0] = vb2_plane_vaddr(vb, 0);
+ spin_lock_irqsave(&stats_dev->irq_lock, flags);
+ list_add_tail(&stats_buf->queue, &stats_dev->stat);
+ spin_unlock_irqrestore(&stats_dev->irq_lock, flags);
+}
+
+static int rkisp1_stats_vb2_buf_prepare(struct vb2_buffer *vb)
+{
+ if (vb2_plane_size(vb, 0) < sizeof(struct rkisp1_stat_buffer))
+ return -EINVAL;
+
+ vb2_set_plane_payload(vb, 0, sizeof(struct rkisp1_stat_buffer));
+
+ return 0;
+}
+
+static void rkisp1_stats_vb2_stop_streaming(struct vb2_queue *vq)
+{
+ struct rkisp1_isp_stats_vdev *stats_vdev = vq->drv_priv;
+ struct rkisp1_buffer *buf;
+ unsigned long flags;
+ int i;
+
+ /* stop stats received firstly */
+ spin_lock_irqsave(&stats_vdev->irq_lock, flags);
+ stats_vdev->streamon = false;
+ spin_unlock_irqrestore(&stats_vdev->irq_lock, flags);
+
+ drain_workqueue(stats_vdev->readout_wq);
+
+ for (i = 0; i < RKISP1_ISP_STATS_REQ_BUFS_MAX; i++) {
+ spin_lock_irqsave(&stats_vdev->irq_lock, flags);
+ if (!list_empty(&stats_vdev->stat)) {
+ buf = list_first_entry(&stats_vdev->stat,
+ struct rkisp1_buffer, queue);
+ list_del(&buf->queue);
+ spin_unlock_irqrestore(&stats_vdev->irq_lock, flags);
+ } else {
+ spin_unlock_irqrestore(&stats_vdev->irq_lock, flags);
+ break;
+ }
+
+ if (buf)
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+ buf = NULL;
+ }
+}
+
+static int
+rkisp1_stats_vb2_start_streaming(struct vb2_queue *queue,
+ unsigned int count)
+{
+ struct rkisp1_isp_stats_vdev *stats_vdev = queue->drv_priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&stats_vdev->irq_lock, flags);
+ stats_vdev->streamon = true;
+ spin_unlock_irqrestore(&stats_vdev->irq_lock, flags);
+
+ return 0;
+}
+
+static struct vb2_ops rkisp1_stats_vb2_ops = {
+ .queue_setup = rkisp1_stats_vb2_queue_setup,
+ .buf_queue = rkisp1_stats_vb2_buf_queue,
+ .buf_prepare = rkisp1_stats_vb2_buf_prepare,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .stop_streaming = rkisp1_stats_vb2_stop_streaming,
+ .start_streaming = rkisp1_stats_vb2_start_streaming,
+};
+
+static int rkisp1_stats_init_vb2_queue(struct vb2_queue *q,
+ struct rkisp1_isp_stats_vdev *stats_vdev)
+{
+ struct rkisp1_vdev_node *node;
+
+ node = queue_to_node(q);
+
+ q->type = V4L2_BUF_TYPE_META_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
+ q->drv_priv = stats_vdev;
+ q->ops = &rkisp1_stats_vb2_ops;
+ q->mem_ops = &vb2_vmalloc_memops;
+ q->buf_struct_size = sizeof(struct rkisp1_buffer);
+ q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ q->lock = &node->vlock;
+
+ return vb2_queue_init(q);
+}
+
+static void rkisp1_stats_get_awb_meas(struct rkisp1_isp_stats_vdev *stats_vdev,
+ struct rkisp1_stat_buffer *pbuf)
+{
+ /* Protect against concurrent access from ISR? */
+ u32 reg_val;
+
+ pbuf->meas_type |= CIFISP_STAT_AWB;
+ reg_val = readl(stats_vdev->dev->base_addr + CIF_ISP_AWB_WHITE_CNT);
+ pbuf->params.awb.awb_mean[0].cnt = CIF_ISP_AWB_GET_PIXEL_CNT(reg_val);
+ reg_val = readl(stats_vdev->dev->base_addr + CIF_ISP_AWB_MEAN);
+
+ pbuf->params.awb.awb_mean[0].mean_cr_or_r =
+ CIF_ISP_AWB_GET_MEAN_CR_R(reg_val);
+ pbuf->params.awb.awb_mean[0].mean_cb_or_b =
+ CIF_ISP_AWB_GET_MEAN_CB_B(reg_val);
+ pbuf->params.awb.awb_mean[0].mean_y_or_g =
+ CIF_ISP_AWB_GET_MEAN_Y_G(reg_val);
+}
+
+static void rkisp1_stats_get_aec_meas(struct rkisp1_isp_stats_vdev *stats_vdev,
+ struct rkisp1_stat_buffer *pbuf)
+{
+ unsigned int i;
+ void __iomem *addr = stats_vdev->dev->base_addr + CIF_ISP_EXP_MEAN_00;
+
+ pbuf->meas_type |= CIFISP_STAT_AUTOEXP;
+ for (i = 0; i < CIFISP_AE_MEAN_MAX; i++)
+ pbuf->params.ae.exp_mean[i] = (u8)readl(addr + i * 4);
+}
+
+static void rkisp1_stats_get_afc_meas(struct rkisp1_isp_stats_vdev *stats_vdev,
+ struct rkisp1_stat_buffer *pbuf)
+{
+ void __iomem *base_addr;
+ struct cifisp_af_stat *af;
+
+ pbuf->meas_type = CIFISP_STAT_AFM_FIN;
+
+ af = &pbuf->params.af;
+ base_addr = stats_vdev->dev->base_addr;
+ af->window[0].sum = readl(base_addr + CIF_ISP_AFM_SUM_A);
+ af->window[0].lum = readl(base_addr + CIF_ISP_AFM_LUM_A);
+ af->window[1].sum = readl(base_addr + CIF_ISP_AFM_SUM_B);
+ af->window[1].lum = readl(base_addr + CIF_ISP_AFM_LUM_B);
+ af->window[2].sum = readl(base_addr + CIF_ISP_AFM_SUM_C);
+ af->window[2].lum = readl(base_addr + CIF_ISP_AFM_LUM_C);
+}
+
+static void rkisp1_stats_get_hst_meas(struct rkisp1_isp_stats_vdev *stats_vdev,
+ struct rkisp1_stat_buffer *pbuf)
+{
+ int i;
+ void __iomem *addr = stats_vdev->dev->base_addr + CIF_ISP_HIST_BIN_0;
+
+ pbuf->meas_type |= CIFISP_STAT_HIST;
+ for (i = 0; i < CIFISP_HIST_BIN_N_MAX; i++)
+ pbuf->params.hist.hist_bins[i] = readl(addr + (i * 4));
+}
+
+static void rkisp1_stats_get_bls_meas(struct rkisp1_isp_stats_vdev *stats_vdev,
+ struct rkisp1_stat_buffer *pbuf)
+{
+ struct rkisp1_device *dev = stats_vdev->dev;
+ const struct ispsd_in_fmt *in_fmt =
+ rkisp1_get_ispsd_in_fmt(&dev->isp_sdev);
+ void __iomem *base = stats_vdev->dev->base_addr;
+ struct cifisp_bls_meas_val *bls_val;
+
+ bls_val = &pbuf->params.ae.bls_val;
+ if (in_fmt->bayer_pat == RAW_BGGR) {
+ bls_val->meas_b = readl(base + CIF_ISP_BLS_A_MEASURED);
+ bls_val->meas_gb = readl(base + CIF_ISP_BLS_B_MEASURED);
+ bls_val->meas_gr = readl(base + CIF_ISP_BLS_C_MEASURED);
+ bls_val->meas_r = readl(base + CIF_ISP_BLS_D_MEASURED);
+ } else if (in_fmt->bayer_pat == RAW_GBRG) {
+ bls_val->meas_gb = readl(base + CIF_ISP_BLS_A_MEASURED);
+ bls_val->meas_b = readl(base + CIF_ISP_BLS_B_MEASURED);
+ bls_val->meas_r = readl(base + CIF_ISP_BLS_C_MEASURED);
+ bls_val->meas_gr = readl(base + CIF_ISP_BLS_D_MEASURED);
+ } else if (in_fmt->bayer_pat == RAW_GRBG) {
+ bls_val->meas_gr = readl(base + CIF_ISP_BLS_A_MEASURED);
+ bls_val->meas_r = readl(base + CIF_ISP_BLS_B_MEASURED);
+ bls_val->meas_b = readl(base + CIF_ISP_BLS_C_MEASURED);
+ bls_val->meas_gb = readl(base + CIF_ISP_BLS_D_MEASURED);
+ } else if (in_fmt->bayer_pat == RAW_RGGB) {
+ bls_val->meas_r = readl(base + CIF_ISP_BLS_A_MEASURED);
+ bls_val->meas_gr = readl(base + CIF_ISP_BLS_B_MEASURED);
+ bls_val->meas_gb = readl(base + CIF_ISP_BLS_C_MEASURED);
+ bls_val->meas_b = readl(base + CIF_ISP_BLS_D_MEASURED);
+ }
+}
+
+static void
+rkisp1_stats_send_measurement(struct rkisp1_isp_stats_vdev *stats_vdev,
+ struct rkisp1_isp_readout_work *meas_work)
+{
+ unsigned long lock_flags = 0;
+ unsigned int cur_frame_id = -1;
+ struct rkisp1_stat_buffer *cur_stat_buf;
+ struct rkisp1_buffer *cur_buf = NULL;
+
+ spin_lock_irqsave(&stats_vdev->irq_lock, lock_flags);
+ cur_frame_id = atomic_read(&stats_vdev->dev->isp_sdev.frm_sync_seq) - 1;
+ if (cur_frame_id != meas_work->frame_id) {
+ v4l2_warn(stats_vdev->vnode.vdev.v4l2_dev,
+ "Measurement late(%d, %d)\n",
+ cur_frame_id, meas_work->frame_id);
+ cur_frame_id = meas_work->frame_id;
+ }
+ /* get one empty buffer */
+ if (!list_empty(&stats_vdev->stat)) {
+ cur_buf = list_first_entry(&stats_vdev->stat,
+ struct rkisp1_buffer, queue);
+ list_del(&cur_buf->queue);
+ }
+ spin_unlock_irqrestore(&stats_vdev->irq_lock, lock_flags);
+
+ if (!cur_buf)
+ return;
+
+ cur_stat_buf =
+ (struct rkisp1_stat_buffer *)(cur_buf->vaddr[0]);
+
+ if (meas_work->isp_ris & CIF_ISP_AWB_DONE) {
+ rkisp1_stats_get_awb_meas(stats_vdev, cur_stat_buf);
+ cur_stat_buf->meas_type |= CIFISP_STAT_AWB;
+ }
+
+ if (meas_work->isp_ris & CIF_ISP_AFM_FIN) {
+ rkisp1_stats_get_afc_meas(stats_vdev, cur_stat_buf);
+ cur_stat_buf->meas_type |= CIFISP_STAT_AFM_FIN;
+ }
+
+ if (meas_work->isp_ris & CIF_ISP_EXP_END) {
+ rkisp1_stats_get_aec_meas(stats_vdev, cur_stat_buf);
+ rkisp1_stats_get_bls_meas(stats_vdev, cur_stat_buf);
+ cur_stat_buf->meas_type |= CIFISP_STAT_AUTOEXP;
+ }
+
+ if (meas_work->isp_ris & CIF_ISP_HIST_MEASURE_RDY) {
+ rkisp1_stats_get_hst_meas(stats_vdev, cur_stat_buf);
+ cur_stat_buf->meas_type |= CIFISP_STAT_HIST;
+ }
+
+ vb2_set_plane_payload(&cur_buf->vb.vb2_buf, 0,
+ sizeof(struct rkisp1_stat_buffer));
+ cur_buf->vb.sequence = cur_frame_id;
+ cur_buf->vb.vb2_buf.timestamp = ktime_get_ns();
+ vb2_buffer_done(&cur_buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
+}
+
+static void rkisp1_stats_readout_work(struct work_struct *work)
+{
+ struct rkisp1_isp_readout_work *readout_work = container_of(work,
+ struct rkisp1_isp_readout_work,
+ work);
+ struct rkisp1_isp_stats_vdev *stats_vdev = readout_work->stats_vdev;
+
+ if (readout_work->readout == RKISP1_ISP_READOUT_MEAS)
+ rkisp1_stats_send_measurement(stats_vdev, readout_work);
+
+ kfree(readout_work);
+}
+
+int rkisp1_stats_isr(struct rkisp1_isp_stats_vdev *stats_vdev, u32 isp_ris)
+{
+ unsigned int isp_mis_tmp = 0;
+ struct rkisp1_isp_readout_work *work;
+ unsigned int cur_frame_id =
+ atomic_read(&stats_vdev->dev->isp_sdev.frm_sync_seq) - 1;
+#ifdef LOG_ISR_EXE_TIME
+ ktime_t in_t = ktime_get();
+#endif
+
+ writel((CIF_ISP_AWB_DONE | CIF_ISP_AFM_FIN | CIF_ISP_EXP_END |
+ CIF_ISP_HIST_MEASURE_RDY),
+ stats_vdev->dev->base_addr + CIF_ISP_ICR);
+
+ isp_mis_tmp = readl(stats_vdev->dev->base_addr + CIF_ISP_MIS);
+ if (isp_mis_tmp &
+ (CIF_ISP_AWB_DONE | CIF_ISP_AFM_FIN |
+ CIF_ISP_EXP_END | CIF_ISP_HIST_MEASURE_RDY))
+ v4l2_err(stats_vdev->vnode.vdev.v4l2_dev,
+ "isp icr 3A info err: 0x%x\n",
+ isp_mis_tmp);
+
+ if (isp_ris & (CIF_ISP_AWB_DONE | CIF_ISP_AFM_FIN | CIF_ISP_EXP_END |
+ CIF_ISP_HIST_MEASURE_RDY)) {
+ work = (struct rkisp1_isp_readout_work *)
+ kzalloc(sizeof(struct rkisp1_isp_readout_work),
+ GFP_ATOMIC);
+ if (work) {
+ INIT_WORK(&work->work,
+ rkisp1_stats_readout_work);
+ work->readout = RKISP1_ISP_READOUT_MEAS;
+ work->stats_vdev = stats_vdev;
+ work->frame_id = cur_frame_id;
+ work->isp_ris = isp_ris;
+ if (!queue_work(stats_vdev->readout_wq,
+ &work->work))
+ kfree(work);
+ } else {
+ v4l2_err(stats_vdev->vnode.vdev.v4l2_dev,
+ "Could not allocate work\n");
+ }
+ }
+
+#ifdef LOG_ISR_EXE_TIME
+ if (isp_ris & (CIF_ISP_EXP_END | CIF_ISP_AWB_DONE |
+ CIF_ISP_FRAME | CIF_ISP_HIST_MEASURE_RDY)) {
+ unsigned int diff_us =
+ ktime_to_us(ktime_sub(ktime_get(), in_t));
+
+ if (diff_us > g_longest_isr_time)
+ g_longest_isr_time = diff_us;
+
+ v4l2_info(stats_vdev->vnode.vdev.v4l2_dev,
+ "isp_isr time %d %d\n", diff_us, g_longest_isr_time);
+ }
+#endif
+
+ return 0;
+}
+
+static void rkisp1_init_stats_vdev(struct rkisp1_isp_stats_vdev *stats_vdev)
+{
+ stats_vdev->vdev_fmt.fmt.meta.dataformat =
+ V4L2_META_FMT_RK_ISP1_STAT_3A;
+ stats_vdev->vdev_fmt.fmt.meta.buffersize =
+ sizeof(struct rkisp1_stat_buffer);
+}
+
+int rkisp1_register_stats_vdev(struct rkisp1_isp_stats_vdev *stats_vdev,
+ struct v4l2_device *v4l2_dev,
+ struct rkisp1_device *dev)
+{
+ int ret;
+ struct rkisp1_vdev_node *node = &stats_vdev->vnode;
+ struct video_device *vdev = &node->vdev;
+
+ stats_vdev->dev = dev;
+ mutex_init(&node->vlock);
+ INIT_LIST_HEAD(&stats_vdev->stat);
+ spin_lock_init(&stats_vdev->irq_lock);
+
+ strlcpy(vdev->name, "rkisp1-statistics", sizeof(vdev->name));
+
+ video_set_drvdata(vdev, stats_vdev);
+ vdev->ioctl_ops = &rkisp1_stats_ioctl;
+ vdev->fops = &rkisp1_stats_fops;
+ vdev->release = video_device_release_empty;
+ vdev->lock = &node->vlock;
+ vdev->v4l2_dev = v4l2_dev;
+ vdev->queue = &node->buf_queue;
+ vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;
+ vdev->vfl_dir = VFL_DIR_RX;
+ rkisp1_stats_init_vb2_queue(vdev->queue, stats_vdev);
+ rkisp1_init_stats_vdev(stats_vdev);
+ video_set_drvdata(vdev, stats_vdev);
+
+ node->pad.flags = MEDIA_PAD_FL_SINK;
+ ret = media_entity_pads_init(&vdev->entity, 1, &node->pad);
+ if (ret < 0)
+ goto err_release_queue;
+
+ ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+ if (ret < 0) {
+ dev_err(&vdev->dev,
+ "could not register Video for Linux device\n");
+ goto err_cleanup_media_entity;
+ }
+
+ stats_vdev->readout_wq =
+ alloc_workqueue("measurement_queue",
+ WQ_UNBOUND | WQ_MEM_RECLAIM, 1);
+
+ if (!stats_vdev->readout_wq) {
+ ret = -ENOMEM;
+ goto err_unreg_vdev;
+ }
+
+ return 0;
+err_unreg_vdev:
+ video_unregister_device(vdev);
+err_cleanup_media_entity:
+ media_entity_cleanup(&vdev->entity);
+err_release_queue:
+ vb2_queue_release(vdev->queue);
+ return ret;
+}
+
+void rkisp1_unregister_stats_vdev(struct rkisp1_isp_stats_vdev *stats_vdev)
+{
+ struct rkisp1_vdev_node *node = &stats_vdev->vnode;
+ struct video_device *vdev = &node->vdev;
+
+ destroy_workqueue(stats_vdev->readout_wq);
+ video_unregister_device(vdev);
+ media_entity_cleanup(&vdev->entity);
+ vb2_queue_release(vdev->queue);
+}
diff --git a/drivers/media/platform/rockchip/isp1/isp_stats.h b/drivers/media/platform/rockchip/isp1/isp_stats.h
new file mode 100644
index 000000000000..75f832a3d968
--- /dev/null
+++ b/drivers/media/platform/rockchip/isp1/isp_stats.h
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Rockchip isp1 driver
+ *
+ * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
+ */
+
+#ifndef _RKISP1_ISP_STATS_H
+#define _RKISP1_ISP_STATS_H
+
+#include <linux/rkisp1-config.h>
+#include "common.h"
+
+struct rkisp1_isp_stats_vdev;
+
+enum rkisp1_isp_readout_cmd {
+ RKISP1_ISP_READOUT_MEAS,
+ RKISP1_ISP_READOUT_META,
+};
+
+struct rkisp1_isp_readout_work {
+ struct work_struct work;
+ struct rkisp1_isp_stats_vdev *stats_vdev;
+
+ unsigned int frame_id;
+ unsigned int isp_ris;
+ enum rkisp1_isp_readout_cmd readout;
+ struct vb2_buffer *vb;
+};
+
+/*
+ * struct rkisp1_isp_stats_vdev - ISP Statistics device
+ *
+ * @irq_lock: buffer queue lock
+ * @stat: stats buffer list
+ * @readout_wq: workqueue for statistics information read
+ */
+struct rkisp1_isp_stats_vdev {
+ struct rkisp1_vdev_node vnode;
+ struct rkisp1_device *dev;
+
+ spinlock_t irq_lock;
+ struct list_head stat;
+ struct v4l2_format vdev_fmt;
+ bool streamon;
+
+ struct workqueue_struct *readout_wq;
+};
+
+int rkisp1_stats_isr(struct rkisp1_isp_stats_vdev *stats_vdev, u32 isp_ris);
+
+int rkisp1_register_stats_vdev(struct rkisp1_isp_stats_vdev *stats_vdev,
+ struct v4l2_device *v4l2_dev,
+ struct rkisp1_device *dev);
+
+void rkisp1_unregister_stats_vdev(struct rkisp1_isp_stats_vdev *stats_vdev);
+
+#endif /* _RKISP1_ISP_STATS_H */
--
2.16.1