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// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
* Rockchip ISP1 Driver - Stats subdevice
*
* 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 "rkisp1-common.h"
#define RKISP1_STATS_DEV_NAME RKISP1_DRIVER_NAME "_stats"
#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_stats *stats = video_get_drvdata(video);
if (f->index > 0 || f->type != video->queue->type)
return -EINVAL;
f->pixelformat = stats->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_stats *stats = 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_fmt.fmt.meta.dataformat;
meta->buffersize = stats->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);
strscpy(cap->driver, RKISP1_DRIVER_NAME, sizeof(cap->driver));
strscpy(cap->card, vdev->name, sizeof(cap->card));
strscpy(cap->bus_info, RKISP1_BUS_INFO, 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,
};
static const 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[])
{
*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);
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 =
container_of(vbuf, struct rkisp1_buffer, vb);
struct vb2_queue *vq = vb->vb2_queue;
struct rkisp1_stats *stats_dev = vq->drv_priv;
stats_buf->vaddr = vb2_plane_vaddr(vb, 0);
spin_lock_irq(&stats_dev->lock);
list_add_tail(&stats_buf->queue, &stats_dev->stat);
spin_unlock_irq(&stats_dev->lock);
}
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_stats *stats = vq->drv_priv;
struct rkisp1_buffer *buf;
unsigned int i;
spin_lock_irq(&stats->lock);
for (i = 0; i < RKISP1_ISP_STATS_REQ_BUFS_MAX; i++) {
if (list_empty(&stats->stat))
break;
buf = list_first_entry(&stats->stat,
struct rkisp1_buffer, queue);
list_del(&buf->queue);
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
spin_unlock_irq(&stats->lock);
}
static const 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,
};
static int
rkisp1_stats_init_vb2_queue(struct vb2_queue *q, struct rkisp1_stats *stats)
{
struct rkisp1_vdev_node *node;
node = container_of(q, struct rkisp1_vdev_node, buf_queue);
q->type = V4L2_BUF_TYPE_META_CAPTURE;
q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
q->drv_priv = stats;
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_stats *stats,
struct rkisp1_stat_buffer *pbuf)
{
/* Protect against concurrent access from ISR? */
struct rkisp1_device *rkisp1 = stats->rkisp1;
u32 reg_val;
pbuf->meas_type |= RKISP1_CIF_ISP_STAT_AWB;
reg_val = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AWB_WHITE_CNT);
pbuf->params.awb.awb_mean[0].cnt =
RKISP1_CIF_ISP_AWB_GET_PIXEL_CNT(reg_val);
reg_val = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AWB_MEAN);
pbuf->params.awb.awb_mean[0].mean_cr_or_r =
RKISP1_CIF_ISP_AWB_GET_MEAN_CR_R(reg_val);
pbuf->params.awb.awb_mean[0].mean_cb_or_b =
RKISP1_CIF_ISP_AWB_GET_MEAN_CB_B(reg_val);
pbuf->params.awb.awb_mean[0].mean_y_or_g =
RKISP1_CIF_ISP_AWB_GET_MEAN_Y_G(reg_val);
}
static void rkisp1_stats_get_aec_meas(struct rkisp1_stats *stats,
struct rkisp1_stat_buffer *pbuf)
{
struct rkisp1_device *rkisp1 = stats->rkisp1;
unsigned int i;
pbuf->meas_type |= RKISP1_CIF_ISP_STAT_AUTOEXP;
for (i = 0; i < RKISP1_CIF_ISP_AE_MEAN_MAX; i++)
pbuf->params.ae.exp_mean[i] =
(u8)rkisp1_read(rkisp1,
RKISP1_CIF_ISP_EXP_MEAN_00 + i * 4);
}
static void rkisp1_stats_get_afc_meas(struct rkisp1_stats *stats,
struct rkisp1_stat_buffer *pbuf)
{
struct rkisp1_device *rkisp1 = stats->rkisp1;
struct rkisp1_cif_isp_af_stat *af;
pbuf->meas_type |= RKISP1_CIF_ISP_STAT_AFM;
af = &pbuf->params.af;
af->window[0].sum = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AFM_SUM_A);
af->window[0].lum = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AFM_LUM_A);
af->window[1].sum = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AFM_SUM_B);
af->window[1].lum = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AFM_LUM_B);
af->window[2].sum = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AFM_SUM_C);
af->window[2].lum = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AFM_LUM_C);
}
static void rkisp1_stats_get_hst_meas(struct rkisp1_stats *stats,
struct rkisp1_stat_buffer *pbuf)
{
struct rkisp1_device *rkisp1 = stats->rkisp1;
unsigned int i;
pbuf->meas_type |= RKISP1_CIF_ISP_STAT_HIST;
for (i = 0; i < RKISP1_CIF_ISP_HIST_BIN_N_MAX; i++)
pbuf->params.hist.hist_bins[i] =
(u8)rkisp1_read(rkisp1,
RKISP1_CIF_ISP_HIST_BIN_0 + i * 4);
}
static void rkisp1_stats_get_bls_meas(struct rkisp1_stats *stats,
struct rkisp1_stat_buffer *pbuf)
{
struct rkisp1_device *rkisp1 = stats->rkisp1;
const struct rkisp1_isp_mbus_info *in_fmt = rkisp1->isp.sink_fmt;
struct rkisp1_cif_isp_bls_meas_val *bls_val;
bls_val = &pbuf->params.ae.bls_val;
if (in_fmt->bayer_pat == RKISP1_RAW_BGGR) {
bls_val->meas_b =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_A_MEASURED);
bls_val->meas_gb =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_B_MEASURED);
bls_val->meas_gr =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_C_MEASURED);
bls_val->meas_r =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_D_MEASURED);
} else if (in_fmt->bayer_pat == RKISP1_RAW_GBRG) {
bls_val->meas_gb =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_A_MEASURED);
bls_val->meas_b =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_B_MEASURED);
bls_val->meas_r =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_C_MEASURED);
bls_val->meas_gr =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_D_MEASURED);
} else if (in_fmt->bayer_pat == RKISP1_RAW_GRBG) {
bls_val->meas_gr =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_A_MEASURED);
bls_val->meas_r =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_B_MEASURED);
bls_val->meas_b =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_C_MEASURED);
bls_val->meas_gb =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_D_MEASURED);
} else if (in_fmt->bayer_pat == RKISP1_RAW_RGGB) {
bls_val->meas_r =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_A_MEASURED);
bls_val->meas_gr =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_B_MEASURED);
bls_val->meas_gb =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_C_MEASURED);
bls_val->meas_b =
rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_D_MEASURED);
}
}
static void
rkisp1_stats_send_measurement(struct rkisp1_stats *stats, u32 isp_ris)
{
struct rkisp1_stat_buffer *cur_stat_buf;
struct rkisp1_buffer *cur_buf = NULL;
unsigned int frame_sequence = stats->rkisp1->isp.frame_sequence;
u64 timestamp = ktime_get_ns();
/* get one empty buffer */
if (!list_empty(&stats->stat)) {
cur_buf = list_first_entry(&stats->stat,
struct rkisp1_buffer, queue);
list_del(&cur_buf->queue);
}
if (!cur_buf)
return;
cur_stat_buf =
(struct rkisp1_stat_buffer *)(cur_buf->vaddr);
if (isp_ris & RKISP1_CIF_ISP_AWB_DONE)
rkisp1_stats_get_awb_meas(stats, cur_stat_buf);
if (isp_ris & RKISP1_CIF_ISP_AFM_FIN)
rkisp1_stats_get_afc_meas(stats, cur_stat_buf);
if (isp_ris & RKISP1_CIF_ISP_EXP_END) {
rkisp1_stats_get_aec_meas(stats, cur_stat_buf);
rkisp1_stats_get_bls_meas(stats, cur_stat_buf);
}
if (isp_ris & RKISP1_CIF_ISP_HIST_MEASURE_RDY)
rkisp1_stats_get_hst_meas(stats, cur_stat_buf);
vb2_set_plane_payload(&cur_buf->vb.vb2_buf, 0,
sizeof(struct rkisp1_stat_buffer));
cur_buf->vb.sequence = frame_sequence;
cur_buf->vb.vb2_buf.timestamp = timestamp;
vb2_buffer_done(&cur_buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
}
void rkisp1_stats_isr(struct rkisp1_stats *stats, u32 isp_ris)
{
struct rkisp1_device *rkisp1 = stats->rkisp1;
unsigned int isp_mis_tmp = 0;
spin_lock(&stats->lock);
rkisp1_write(rkisp1, RKISP1_STATS_MEAS_MASK, RKISP1_CIF_ISP_ICR);
isp_mis_tmp = rkisp1_read(rkisp1, RKISP1_CIF_ISP_MIS);
if (isp_mis_tmp & RKISP1_STATS_MEAS_MASK)
rkisp1->debug.stats_error++;
if (isp_ris & RKISP1_STATS_MEAS_MASK)
rkisp1_stats_send_measurement(stats, isp_ris);
spin_unlock(&stats->lock);
}
static void rkisp1_init_stats(struct rkisp1_stats *stats)
{
stats->vdev_fmt.fmt.meta.dataformat =
V4L2_META_FMT_RK_ISP1_STAT_3A;
stats->vdev_fmt.fmt.meta.buffersize =
sizeof(struct rkisp1_stat_buffer);
}
int rkisp1_stats_register(struct rkisp1_device *rkisp1)
{
struct rkisp1_stats *stats = &rkisp1->stats;
struct rkisp1_vdev_node *node = &stats->vnode;
struct video_device *vdev = &node->vdev;
int ret;
stats->rkisp1 = rkisp1;
mutex_init(&node->vlock);
INIT_LIST_HEAD(&stats->stat);
spin_lock_init(&stats->lock);
strscpy(vdev->name, RKISP1_STATS_DEV_NAME, sizeof(vdev->name));
video_set_drvdata(vdev, stats);
vdev->ioctl_ops = &rkisp1_stats_ioctl;
vdev->fops = &rkisp1_stats_fops;
vdev->release = video_device_release_empty;
vdev->lock = &node->vlock;
vdev->v4l2_dev = &rkisp1->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);
rkisp1_init_stats(stats);
video_set_drvdata(vdev, stats);
node->pad.flags = MEDIA_PAD_FL_SINK;
ret = media_entity_pads_init(&vdev->entity, 1, &node->pad);
if (ret)
goto err_mutex_destroy;
ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
if (ret) {
dev_err(&vdev->dev,
"failed to register %s, ret=%d\n", vdev->name, ret);
goto err_cleanup_media_entity;
}
return 0;
err_cleanup_media_entity:
media_entity_cleanup(&vdev->entity);
err_mutex_destroy:
mutex_destroy(&node->vlock);
return ret;
}
void rkisp1_stats_unregister(struct rkisp1_device *rkisp1)
{
struct rkisp1_stats *stats = &rkisp1->stats;
struct rkisp1_vdev_node *node = &stats->vnode;
struct video_device *vdev = &node->vdev;
vb2_video_unregister_device(vdev);
media_entity_cleanup(&vdev->entity);
mutex_destroy(&node->vlock);
}