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// SPDX-License-Identifier: (GPL-2.0-only OR MIT)
/*
* Copyright (C) 2024 Amlogic, Inc. All rights reserved
*/
#include <linux/cleanup.h>
#include <linux/media/amlogic/c3-isp-config.h>
#include <linux/pm_runtime.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mc.h>
#include <media/videobuf2-dma-contig.h>
#include "c3-isp-common.h"
#include "c3-isp-regs.h"
/* Hardware configuration */
static void c3_isp_stats_cfg_dmawr_addr(struct c3_isp_stats *stats)
{
u32 awb_dma_size = sizeof(struct c3_isp_awb_stats);
u32 ae_dma_size = sizeof(struct c3_isp_ae_stats);
u32 awb_dma_addr = stats->buff->dma_addr;
u32 af_dma_addr;
u32 ae_dma_addr;
ae_dma_addr = awb_dma_addr + awb_dma_size;
af_dma_addr = ae_dma_addr + ae_dma_size;
c3_isp_update_bits(stats->isp, VIU_DMAWR_BADDR0,
VIU_DMAWR_BADDR0_AF_STATS_BASE_ADDR_MASK,
VIU_DMAWR_BADDR0_AF_STATS_BASE_ADDR(af_dma_addr));
c3_isp_update_bits(stats->isp, VIU_DMAWR_BADDR1,
VIU_DMAWR_BADDR1_AWB_STATS_BASE_ADDR_MASK,
VIU_DMAWR_BADDR1_AWB_STATS_BASE_ADDR(awb_dma_addr));
c3_isp_update_bits(stats->isp, VIU_DMAWR_BADDR2,
VIU_DMAWR_BADDR2_AE_STATS_BASE_ADDR_MASK,
VIU_DMAWR_BADDR2_AE_STATS_BASE_ADDR(ae_dma_addr));
}
static void c3_isp_stats_cfg_buff(struct c3_isp_stats *stats)
{
stats->buff =
list_first_entry_or_null(&stats->pending,
struct c3_isp_stats_buffer, list);
if (stats->buff) {
c3_isp_stats_cfg_dmawr_addr(stats);
list_del(&stats->buff->list);
}
}
void c3_isp_stats_pre_cfg(struct c3_isp_device *isp)
{
struct c3_isp_stats *stats = &isp->stats;
u32 dma_size;
c3_isp_update_bits(stats->isp, ISP_AF_EN_CTRL,
ISP_AF_EN_CTRL_STAT_SEL_MASK,
ISP_AF_EN_CTRL_STAT_SEL_NEW);
c3_isp_update_bits(stats->isp, ISP_AE_CTRL,
ISP_AE_CTRL_LUMA_MODE_MASK,
ISP_AE_CTRL_LUMA_MODE_FILTER);
/* The unit of dma_size is 16 bytes */
dma_size = sizeof(struct c3_isp_af_stats) / C3_ISP_DMA_SIZE_ALIGN_BYTES;
c3_isp_update_bits(stats->isp, VIU_DMAWR_SIZE0,
VIU_DMAWR_SIZE0_AF_STATS_SIZE_MASK,
VIU_DMAWR_SIZE0_AF_STATS_SIZE(dma_size));
dma_size = sizeof(struct c3_isp_awb_stats) /
C3_ISP_DMA_SIZE_ALIGN_BYTES;
c3_isp_update_bits(stats->isp, VIU_DMAWR_SIZE0,
VIU_DMAWR_SIZE0_AWB_STATS_SIZE_MASK,
VIU_DMAWR_SIZE0_AWB_STATS_SIZE(dma_size));
dma_size = sizeof(struct c3_isp_ae_stats) / C3_ISP_DMA_SIZE_ALIGN_BYTES;
c3_isp_update_bits(stats->isp, VIU_DMAWR_SIZE1,
VIU_DMAWR_SIZE1_AE_STATS_SIZE_MASK,
VIU_DMAWR_SIZE1_AE_STATS_SIZE(dma_size));
guard(spinlock_irqsave)(&stats->buff_lock);
c3_isp_stats_cfg_buff(stats);
}
static int c3_isp_stats_querycap(struct file *file, void *fh,
struct v4l2_capability *cap)
{
strscpy(cap->driver, C3_ISP_DRIVER_NAME, sizeof(cap->driver));
strscpy(cap->card, "AML C3 ISP", sizeof(cap->card));
return 0;
}
static int c3_isp_stats_enum_fmt(struct file *file, void *fh,
struct v4l2_fmtdesc *f)
{
struct c3_isp_stats *stats = video_drvdata(file);
if (f->index > 0 || f->type != stats->vb2_q.type)
return -EINVAL;
f->pixelformat = V4L2_META_FMT_C3ISP_STATS;
return 0;
}
static int c3_isp_stats_g_fmt(struct file *file, void *fh,
struct v4l2_format *f)
{
struct c3_isp_stats *stats = video_drvdata(file);
f->fmt.meta = stats->vfmt.fmt.meta;
return 0;
}
static const struct v4l2_ioctl_ops isp_stats_v4l2_ioctl_ops = {
.vidioc_querycap = c3_isp_stats_querycap,
.vidioc_enum_fmt_meta_cap = c3_isp_stats_enum_fmt,
.vidioc_g_fmt_meta_cap = c3_isp_stats_g_fmt,
.vidioc_s_fmt_meta_cap = c3_isp_stats_g_fmt,
.vidioc_try_fmt_meta_cap = c3_isp_stats_g_fmt,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
};
static const struct v4l2_file_operations isp_stats_v4l2_fops = {
.open = v4l2_fh_open,
.release = vb2_fop_release,
.poll = vb2_fop_poll,
.unlocked_ioctl = video_ioctl2,
.mmap = vb2_fop_mmap,
};
static int c3_isp_stats_vb2_queue_setup(struct vb2_queue *q,
unsigned int *num_buffers,
unsigned int *num_planes,
unsigned int sizes[],
struct device *alloc_devs[])
{
if (*num_planes) {
if (*num_planes != 1)
return -EINVAL;
if (sizes[0] < sizeof(struct c3_isp_stats_info))
return -EINVAL;
return 0;
}
*num_planes = 1;
sizes[0] = sizeof(struct c3_isp_stats_info);
return 0;
}
static void c3_isp_stats_vb2_buf_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *v4l2_buf = to_vb2_v4l2_buffer(vb);
struct c3_isp_stats_buffer *buf =
container_of(v4l2_buf, struct c3_isp_stats_buffer, vb);
struct c3_isp_stats *stats = vb2_get_drv_priv(vb->vb2_queue);
guard(spinlock_irqsave)(&stats->buff_lock);
list_add_tail(&buf->list, &stats->pending);
}
static int c3_isp_stats_vb2_buf_prepare(struct vb2_buffer *vb)
{
struct c3_isp_stats *stats = vb2_get_drv_priv(vb->vb2_queue);
unsigned int size = stats->vfmt.fmt.meta.buffersize;
if (vb2_plane_size(vb, 0) < size) {
dev_err(stats->isp->dev,
"User buffer too small (%ld < %u)\n",
vb2_plane_size(vb, 0), size);
return -EINVAL;
}
vb2_set_plane_payload(vb, 0, size);
return 0;
}
static int c3_isp_stats_vb2_buf_init(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *v4l2_buf = to_vb2_v4l2_buffer(vb);
struct c3_isp_stats_buffer *buf =
container_of(v4l2_buf, struct c3_isp_stats_buffer, vb);
buf->dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
return 0;
}
static void c3_isp_stats_vb2_stop_streaming(struct vb2_queue *q)
{
struct c3_isp_stats *stats = vb2_get_drv_priv(q);
guard(spinlock_irqsave)(&stats->buff_lock);
if (stats->buff) {
vb2_buffer_done(&stats->buff->vb.vb2_buf, VB2_BUF_STATE_ERROR);
stats->buff = NULL;
}
while (!list_empty(&stats->pending)) {
struct c3_isp_stats_buffer *buff;
buff = list_first_entry(&stats->pending,
struct c3_isp_stats_buffer, list);
list_del(&buff->list);
vb2_buffer_done(&buff->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
}
static const struct vb2_ops isp_stats_vb2_ops = {
.queue_setup = c3_isp_stats_vb2_queue_setup,
.buf_queue = c3_isp_stats_vb2_buf_queue,
.buf_prepare = c3_isp_stats_vb2_buf_prepare,
.buf_init = c3_isp_stats_vb2_buf_init,
.stop_streaming = c3_isp_stats_vb2_stop_streaming,
};
int c3_isp_stats_register(struct c3_isp_device *isp)
{
struct c3_isp_stats *stats = &isp->stats;
struct video_device *vdev = &stats->vdev;
struct vb2_queue *vb2_q = &stats->vb2_q;
int ret;
memset(stats, 0, sizeof(*stats));
stats->vfmt.fmt.meta.dataformat = V4L2_META_FMT_C3ISP_STATS;
stats->vfmt.fmt.meta.buffersize = sizeof(struct c3_isp_stats_info);
stats->isp = isp;
INIT_LIST_HEAD(&stats->pending);
spin_lock_init(&stats->buff_lock);
mutex_init(&stats->lock);
snprintf(vdev->name, sizeof(vdev->name), "c3-isp-stats");
vdev->fops = &isp_stats_v4l2_fops;
vdev->ioctl_ops = &isp_stats_v4l2_ioctl_ops;
vdev->v4l2_dev = &isp->v4l2_dev;
vdev->lock = &stats->lock;
vdev->minor = -1;
vdev->queue = vb2_q;
vdev->release = video_device_release_empty;
vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;
vdev->vfl_dir = VFL_DIR_RX;
video_set_drvdata(vdev, stats);
vb2_q->drv_priv = stats;
vb2_q->mem_ops = &vb2_dma_contig_memops;
vb2_q->ops = &isp_stats_vb2_ops;
vb2_q->type = V4L2_BUF_TYPE_META_CAPTURE;
vb2_q->io_modes = VB2_DMABUF | VB2_MMAP;
vb2_q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
vb2_q->buf_struct_size = sizeof(struct c3_isp_stats_buffer);
vb2_q->dev = isp->dev;
vb2_q->lock = &stats->lock;
vb2_q->min_queued_buffers = 2;
ret = vb2_queue_init(vb2_q);
if (ret)
goto err_destroy;
stats->pad.flags = MEDIA_PAD_FL_SINK;
ret = media_entity_pads_init(&vdev->entity, 1, &stats->pad);
if (ret)
goto err_queue_release;
ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
if (ret) {
dev_err(isp->dev,
"Failed to register %s: %d\n", vdev->name, ret);
goto err_entity_cleanup;
}
return 0;
err_entity_cleanup:
media_entity_cleanup(&vdev->entity);
err_queue_release:
vb2_queue_release(vb2_q);
err_destroy:
mutex_destroy(&stats->lock);
return ret;
}
void c3_isp_stats_unregister(struct c3_isp_device *isp)
{
struct c3_isp_stats *stats = &isp->stats;
vb2_queue_release(&stats->vb2_q);
media_entity_cleanup(&stats->vdev.entity);
video_unregister_device(&stats->vdev);
mutex_destroy(&stats->lock);
}
void c3_isp_stats_isr(struct c3_isp_device *isp)
{
struct c3_isp_stats *stats = &isp->stats;
guard(spinlock_irqsave)(&stats->buff_lock);
if (stats->buff) {
stats->buff->vb.sequence = stats->isp->frm_sequence;
stats->buff->vb.vb2_buf.timestamp = ktime_get();
stats->buff->vb.field = V4L2_FIELD_NONE;
vb2_buffer_done(&stats->buff->vb.vb2_buf, VB2_BUF_STATE_DONE);
}
c3_isp_stats_cfg_buff(stats);
}
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