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linux-sg2042/drivers/media/platform/s3c-camif/camif-capture.c

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/*
* s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
*
* Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
* Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com>
*
* Based on drivers/media/platform/s5p-fimc,
* Copyright (C) 2010 - 2012 Samsung Electronics Co., Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
#include <linux/bug.h>
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/ratelimit.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/videodev2.h>
#include <media/media-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-contig.h>
#include "camif-core.h"
#include "camif-regs.h"
static int debug;
module_param(debug, int, 0644);
/* Locking: called with vp->camif->slock spinlock held */
static void camif_cfg_video_path(struct camif_vp *vp)
{
WARN_ON(s3c_camif_get_scaler_config(vp, &vp->scaler));
camif_hw_set_scaler(vp);
camif_hw_set_flip(vp);
camif_hw_set_target_format(vp);
camif_hw_set_output_dma(vp);
}
static void camif_prepare_dma_offset(struct camif_vp *vp)
{
struct camif_frame *f = &vp->out_frame;
f->dma_offset.initial = f->rect.top * f->f_width + f->rect.left;
f->dma_offset.line = f->f_width - (f->rect.left + f->rect.width);
pr_debug("dma_offset: initial: %d, line: %d\n",
f->dma_offset.initial, f->dma_offset.line);
}
/* Locking: called with camif->slock spinlock held */
static int s3c_camif_hw_init(struct camif_dev *camif, struct camif_vp *vp)
{
const struct s3c_camif_variant *variant = camif->variant;
if (camif->sensor.sd == NULL || vp->out_fmt == NULL)
return -EINVAL;
if (variant->ip_revision == S3C244X_CAMIF_IP_REV)
camif_hw_clear_fifo_overflow(vp);
camif_hw_set_camera_bus(camif);
camif_hw_set_source_format(camif);
camif_hw_set_camera_crop(camif);
camif_hw_set_test_pattern(camif, camif->test_pattern);
if (variant->has_img_effect)
camif_hw_set_effect(camif, camif->colorfx,
camif->colorfx_cr, camif->colorfx_cb);
if (variant->ip_revision == S3C6410_CAMIF_IP_REV)
camif_hw_set_input_path(vp);
camif_cfg_video_path(vp);
vp->state &= ~ST_VP_CONFIG;
return 0;
}
/*
* Initialize the video path, only up from the scaler stage. The camera
* input interface set up is skipped. This is useful to enable one of the
* video paths when the other is already running.
* Locking: called with camif->slock spinlock held.
*/
static int s3c_camif_hw_vp_init(struct camif_dev *camif, struct camif_vp *vp)
{
unsigned int ip_rev = camif->variant->ip_revision;
if (vp->out_fmt == NULL)
return -EINVAL;
camif_prepare_dma_offset(vp);
if (ip_rev == S3C244X_CAMIF_IP_REV)
camif_hw_clear_fifo_overflow(vp);
camif_cfg_video_path(vp);
vp->state &= ~ST_VP_CONFIG;
return 0;
}
static int sensor_set_power(struct camif_dev *camif, int on)
{
struct cam_sensor *sensor = &camif->sensor;
int err = 0;
if (camif->sensor.power_count == !on)
err = v4l2_subdev_call(sensor->sd, core, s_power, on);
if (err == -ENOIOCTLCMD)
err = 0;
if (!err)
sensor->power_count += on ? 1 : -1;
pr_debug("on: %d, power_count: %d, err: %d\n",
on, sensor->power_count, err);
return err;
}
static int sensor_set_streaming(struct camif_dev *camif, int on)
{
struct cam_sensor *sensor = &camif->sensor;
int err = 0;
if (camif->sensor.stream_count == !on)
err = v4l2_subdev_call(sensor->sd, video, s_stream, on);
if (!err)
sensor->stream_count += on ? 1 : -1;
pr_debug("on: %d, stream_count: %d, err: %d\n",
on, sensor->stream_count, err);
return err;
}
/*
* Reinitialize the driver so it is ready to start streaming again.
* Return any buffers to vb2, perform CAMIF software reset and
* turn off streaming at the data pipeline (sensor) if required.
*/
static int camif_reinitialize(struct camif_vp *vp)
{
struct camif_dev *camif = vp->camif;
struct camif_buffer *buf;
unsigned long flags;
bool streaming;
spin_lock_irqsave(&camif->slock, flags);
streaming = vp->state & ST_VP_SENSOR_STREAMING;
vp->state &= ~(ST_VP_PENDING | ST_VP_RUNNING | ST_VP_OFF |
ST_VP_ABORTING | ST_VP_STREAMING |
ST_VP_SENSOR_STREAMING | ST_VP_LASTIRQ);
/* Release unused buffers */
while (!list_empty(&vp->pending_buf_q)) {
buf = camif_pending_queue_pop(vp);
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
while (!list_empty(&vp->active_buf_q)) {
buf = camif_active_queue_pop(vp);
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
spin_unlock_irqrestore(&camif->slock, flags);
if (!streaming)
return 0;
return sensor_set_streaming(camif, 0);
}
static bool s3c_vp_active(struct camif_vp *vp)
{
struct camif_dev *camif = vp->camif;
unsigned long flags;
bool ret;
spin_lock_irqsave(&camif->slock, flags);
ret = (vp->state & ST_VP_RUNNING) || (vp->state & ST_VP_PENDING);
spin_unlock_irqrestore(&camif->slock, flags);
return ret;
}
static bool camif_is_streaming(struct camif_dev *camif)
{
unsigned long flags;
bool status;
spin_lock_irqsave(&camif->slock, flags);
status = camif->stream_count > 0;
spin_unlock_irqrestore(&camif->slock, flags);
return status;
}
static int camif_stop_capture(struct camif_vp *vp)
{
struct camif_dev *camif = vp->camif;
unsigned long flags;
int ret;
if (!s3c_vp_active(vp))
return 0;
spin_lock_irqsave(&camif->slock, flags);
vp->state &= ~(ST_VP_OFF | ST_VP_LASTIRQ);
vp->state |= ST_VP_ABORTING;
spin_unlock_irqrestore(&camif->slock, flags);
ret = wait_event_timeout(vp->irq_queue,
!(vp->state & ST_VP_ABORTING),
msecs_to_jiffies(CAMIF_STOP_TIMEOUT));
spin_lock_irqsave(&camif->slock, flags);
if (ret == 0 && !(vp->state & ST_VP_OFF)) {
/* Timed out, forcibly stop capture */
vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING |
ST_VP_LASTIRQ);
camif_hw_disable_capture(vp);
camif_hw_enable_scaler(vp, false);
}
spin_unlock_irqrestore(&camif->slock, flags);
return camif_reinitialize(vp);
}
static int camif_prepare_addr(struct camif_vp *vp, struct vb2_buffer *vb,
struct camif_addr *paddr)
{
struct camif_frame *frame = &vp->out_frame;
u32 pix_size;
if (vb == NULL || frame == NULL)
return -EINVAL;
pix_size = frame->rect.width * frame->rect.height;
pr_debug("colplanes: %d, pix_size: %u\n",
vp->out_fmt->colplanes, pix_size);
paddr->y = vb2_dma_contig_plane_dma_addr(vb, 0);
switch (vp->out_fmt->colplanes) {
case 1:
paddr->cb = 0;
paddr->cr = 0;
break;
case 2:
/* decompose Y into Y/Cb */
paddr->cb = (u32)(paddr->y + pix_size);
paddr->cr = 0;
break;
case 3:
paddr->cb = (u32)(paddr->y + pix_size);
/* decompose Y into Y/Cb/Cr */
if (vp->out_fmt->color == IMG_FMT_YCBCR422P)
paddr->cr = (u32)(paddr->cb + (pix_size >> 1));
else /* 420 */
paddr->cr = (u32)(paddr->cb + (pix_size >> 2));
if (vp->out_fmt->color == IMG_FMT_YCRCB420)
swap(paddr->cb, paddr->cr);
break;
default:
return -EINVAL;
}
pr_debug("DMA address: y: %pad cb: %pad cr: %pad\n",
&paddr->y, &paddr->cb, &paddr->cr);
return 0;
}
irqreturn_t s3c_camif_irq_handler(int irq, void *priv)
{
struct camif_vp *vp = priv;
struct camif_dev *camif = vp->camif;
unsigned int ip_rev = camif->variant->ip_revision;
unsigned int status;
spin_lock(&camif->slock);
if (ip_rev == S3C6410_CAMIF_IP_REV)
camif_hw_clear_pending_irq(vp);
status = camif_hw_get_status(vp);
if (ip_rev == S3C244X_CAMIF_IP_REV && (status & CISTATUS_OVF_MASK)) {
camif_hw_clear_fifo_overflow(vp);
goto unlock;
}
if (vp->state & ST_VP_ABORTING) {
if (vp->state & ST_VP_OFF) {
/* Last IRQ */
vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING |
ST_VP_LASTIRQ);
wake_up(&vp->irq_queue);
goto unlock;
} else if (vp->state & ST_VP_LASTIRQ) {
camif_hw_disable_capture(vp);
camif_hw_enable_scaler(vp, false);
camif_hw_set_lastirq(vp, false);
vp->state |= ST_VP_OFF;
} else {
/* Disable capture, enable last IRQ */
camif_hw_set_lastirq(vp, true);
vp->state |= ST_VP_LASTIRQ;
}
}
if (!list_empty(&vp->pending_buf_q) && (vp->state & ST_VP_RUNNING) &&
!list_empty(&vp->active_buf_q)) {
unsigned int index;
struct camif_buffer *vbuf;
/*
* Get previous DMA write buffer index:
* 0 => DMA buffer 0, 2;
* 1 => DMA buffer 1, 3.
*/
index = (CISTATUS_FRAMECNT(status) + 2) & 1;
vbuf = camif_active_queue_peek(vp, index);
if (!WARN_ON(vbuf == NULL)) {
/* Dequeue a filled buffer */
vbuf->vb.vb2_buf.timestamp = ktime_get_ns();
vbuf->vb.sequence = vp->frame_sequence++;
vb2_buffer_done(&vbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
/* Set up an empty buffer at the DMA engine */
vbuf = camif_pending_queue_pop(vp);
vbuf->index = index;
camif_hw_set_output_addr(vp, &vbuf->paddr, index);
camif_hw_set_output_addr(vp, &vbuf->paddr, index + 2);
/* Scheduled in H/W, add to the queue */
camif_active_queue_add(vp, vbuf);
}
} else if (!(vp->state & ST_VP_ABORTING) &&
(vp->state & ST_VP_PENDING)) {
vp->state |= ST_VP_RUNNING;
}
if (vp->state & ST_VP_CONFIG) {
camif_prepare_dma_offset(vp);
camif_hw_set_camera_crop(camif);
camif_hw_set_scaler(vp);
camif_hw_set_flip(vp);
camif_hw_set_test_pattern(camif, camif->test_pattern);
if (camif->variant->has_img_effect)
camif_hw_set_effect(camif, camif->colorfx,
camif->colorfx_cr, camif->colorfx_cb);
vp->state &= ~ST_VP_CONFIG;
}
unlock:
spin_unlock(&camif->slock);
return IRQ_HANDLED;
}
static int start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct camif_vp *vp = vb2_get_drv_priv(vq);
struct camif_dev *camif = vp->camif;
unsigned long flags;
int ret;
/*
* We assume the codec capture path is always activated
* first, before the preview path starts streaming.
* This is required to avoid internal FIFO overflow and
* a need for CAMIF software reset.
*/
spin_lock_irqsave(&camif->slock, flags);
if (camif->stream_count == 0) {
camif_hw_reset(camif);
ret = s3c_camif_hw_init(camif, vp);
} else {
ret = s3c_camif_hw_vp_init(camif, vp);
}
spin_unlock_irqrestore(&camif->slock, flags);
if (ret < 0) {
camif_reinitialize(vp);
return ret;
}
spin_lock_irqsave(&camif->slock, flags);
vp->frame_sequence = 0;
vp->state |= ST_VP_PENDING;
if (!list_empty(&vp->pending_buf_q) &&
(!(vp->state & ST_VP_STREAMING) ||
!(vp->state & ST_VP_SENSOR_STREAMING))) {
camif_hw_enable_scaler(vp, vp->scaler.enable);
camif_hw_enable_capture(vp);
vp->state |= ST_VP_STREAMING;
if (!(vp->state & ST_VP_SENSOR_STREAMING)) {
vp->state |= ST_VP_SENSOR_STREAMING;
spin_unlock_irqrestore(&camif->slock, flags);
ret = sensor_set_streaming(camif, 1);
if (ret)
v4l2_err(&vp->vdev, "Sensor s_stream failed\n");
if (debug)
camif_hw_dump_regs(camif, __func__);
return ret;
}
}
spin_unlock_irqrestore(&camif->slock, flags);
return 0;
}
static void stop_streaming(struct vb2_queue *vq)
{
struct camif_vp *vp = vb2_get_drv_priv(vq);
camif_stop_capture(vp);
}
static int queue_setup(struct vb2_queue *vq,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct camif_vp *vp = vb2_get_drv_priv(vq);
struct camif_frame *frame = &vp->out_frame;
const struct camif_fmt *fmt = vp->out_fmt;
unsigned int size;
if (fmt == NULL)
return -EINVAL;
size = (frame->f_width * frame->f_height * fmt->depth) / 8;
if (*num_planes)
return sizes[0] < size ? -EINVAL : 0;
*num_planes = 1;
sizes[0] = size;
pr_debug("size: %u\n", sizes[0]);
return 0;
}
static int buffer_prepare(struct vb2_buffer *vb)
{
struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue);
if (vp->out_fmt == NULL)
return -EINVAL;
if (vb2_plane_size(vb, 0) < vp->payload) {
v4l2_err(&vp->vdev, "buffer too small: %lu, required: %u\n",
vb2_plane_size(vb, 0), vp->payload);
return -EINVAL;
}
vb2_set_plane_payload(vb, 0, vp->payload);
return 0;
}
static void buffer_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct camif_buffer *buf = container_of(vbuf, struct camif_buffer, vb);
struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue);
struct camif_dev *camif = vp->camif;
unsigned long flags;
spin_lock_irqsave(&camif->slock, flags);
WARN_ON(camif_prepare_addr(vp, &buf->vb.vb2_buf, &buf->paddr));
if (!(vp->state & ST_VP_STREAMING) && vp->active_buffers < 2) {
/* Schedule an empty buffer in H/W */
buf->index = vp->buf_index;
camif_hw_set_output_addr(vp, &buf->paddr, buf->index);
camif_hw_set_output_addr(vp, &buf->paddr, buf->index + 2);
camif_active_queue_add(vp, buf);
vp->buf_index = !vp->buf_index;
} else {
camif_pending_queue_add(vp, buf);
}
if (vb2_is_streaming(&vp->vb_queue) && !list_empty(&vp->pending_buf_q)
&& !(vp->state & ST_VP_STREAMING)) {
vp->state |= ST_VP_STREAMING;
camif_hw_enable_scaler(vp, vp->scaler.enable);
camif_hw_enable_capture(vp);
spin_unlock_irqrestore(&camif->slock, flags);
if (!(vp->state & ST_VP_SENSOR_STREAMING)) {
if (sensor_set_streaming(camif, 1) == 0)
vp->state |= ST_VP_SENSOR_STREAMING;
else
v4l2_err(&vp->vdev, "Sensor s_stream failed\n");
if (debug)
camif_hw_dump_regs(camif, __func__);
}
return;
}
spin_unlock_irqrestore(&camif->slock, flags);
}
static const struct vb2_ops s3c_camif_qops = {
.queue_setup = queue_setup,
.buf_prepare = buffer_prepare,
.buf_queue = buffer_queue,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
.start_streaming = start_streaming,
.stop_streaming = stop_streaming,
};
static int s3c_camif_open(struct file *file)
{
struct camif_vp *vp = video_drvdata(file);
struct camif_dev *camif = vp->camif;
int ret;
pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
vp->state, vp->owner, task_pid_nr(current));
if (mutex_lock_interruptible(&camif->lock))
return -ERESTARTSYS;
ret = v4l2_fh_open(file);
if (ret < 0)
goto unlock;
ret = pm_runtime_get_sync(camif->dev);
if (ret < 0)
goto err_pm;
ret = sensor_set_power(camif, 1);
if (!ret)
goto unlock;
pm_runtime_put(camif->dev);
err_pm:
v4l2_fh_release(file);
unlock:
mutex_unlock(&camif->lock);
return ret;
}
static int s3c_camif_close(struct file *file)
{
struct camif_vp *vp = video_drvdata(file);
struct camif_dev *camif = vp->camif;
int ret;
pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
vp->state, vp->owner, task_pid_nr(current));
mutex_lock(&camif->lock);
if (vp->owner == file->private_data) {
camif_stop_capture(vp);
vb2_queue_release(&vp->vb_queue);
vp->owner = NULL;
}
sensor_set_power(camif, 0);
pm_runtime_put(camif->dev);
ret = v4l2_fh_release(file);
mutex_unlock(&camif->lock);
return ret;
}
static __poll_t s3c_camif_poll(struct file *file,
struct poll_table_struct *wait)
{
struct camif_vp *vp = video_drvdata(file);
struct camif_dev *camif = vp->camif;
__poll_t ret;
mutex_lock(&camif->lock);
if (vp->owner && vp->owner != file->private_data)
ret = EPOLLERR;
else
ret = vb2_poll(&vp->vb_queue, file, wait);
mutex_unlock(&camif->lock);
return ret;
}
static int s3c_camif_mmap(struct file *file, struct vm_area_struct *vma)
{
struct camif_vp *vp = video_drvdata(file);
int ret;
if (vp->owner && vp->owner != file->private_data)
ret = -EBUSY;
else
ret = vb2_mmap(&vp->vb_queue, vma);
return ret;
}
static const struct v4l2_file_operations s3c_camif_fops = {
.owner = THIS_MODULE,
.open = s3c_camif_open,
.release = s3c_camif_close,
.poll = s3c_camif_poll,
.unlocked_ioctl = video_ioctl2,
.mmap = s3c_camif_mmap,
};
/*
* Video node IOCTLs
*/
static int s3c_camif_vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct camif_vp *vp = video_drvdata(file);
strscpy(cap->driver, S3C_CAMIF_DRIVER_NAME, sizeof(cap->driver));
strscpy(cap->card, S3C_CAMIF_DRIVER_NAME, sizeof(cap->card));
snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s.%d",
dev_name(vp->camif->dev), vp->id);
cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int s3c_camif_vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *input)
{
struct camif_vp *vp = video_drvdata(file);
struct v4l2_subdev *sensor = vp->camif->sensor.sd;
if (input->index || sensor == NULL)
return -EINVAL;
input->type = V4L2_INPUT_TYPE_CAMERA;
strscpy(input->name, sensor->name, sizeof(input->name));
return 0;
}
static int s3c_camif_vidioc_s_input(struct file *file, void *priv,
unsigned int i)
{
return i == 0 ? 0 : -EINVAL;
}
static int s3c_camif_vidioc_g_input(struct file *file, void *priv,
unsigned int *i)
{
*i = 0;
return 0;
}
static int s3c_camif_vidioc_enum_fmt(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct camif_vp *vp = video_drvdata(file);
const struct camif_fmt *fmt;
fmt = s3c_camif_find_format(vp, NULL, f->index);
if (!fmt)
return -EINVAL;
strscpy(f->description, fmt->name, sizeof(f->description));
f->pixelformat = fmt->fourcc;
pr_debug("fmt(%d): %s\n", f->index, f->description);
return 0;
}
static int s3c_camif_vidioc_g_fmt(struct file *file, void *priv,
struct v4l2_format *f)
{
struct camif_vp *vp = video_drvdata(file);
struct v4l2_pix_format *pix = &f->fmt.pix;
struct camif_frame *frame = &vp->out_frame;
const struct camif_fmt *fmt = vp->out_fmt;
pix->bytesperline = frame->f_width * fmt->ybpp;
pix->sizeimage = vp->payload;
pix->pixelformat = fmt->fourcc;
pix->width = frame->f_width;
pix->height = frame->f_height;
pix->field = V4L2_FIELD_NONE;
pix->colorspace = V4L2_COLORSPACE_JPEG;
return 0;
}
static int __camif_video_try_format(struct camif_vp *vp,
struct v4l2_pix_format *pix,
const struct camif_fmt **ffmt)
{
struct camif_dev *camif = vp->camif;
struct v4l2_rect *crop = &camif->camif_crop;
unsigned int wmin, hmin, sc_hrmax, sc_vrmax;
const struct vp_pix_limits *pix_lim;
const struct camif_fmt *fmt;
fmt = s3c_camif_find_format(vp, &pix->pixelformat, 0);
if (WARN_ON(fmt == NULL))
return -EINVAL;
if (ffmt)
*ffmt = fmt;
pix_lim = &camif->variant->vp_pix_limits[vp->id];
pr_debug("fmt: %ux%u, crop: %ux%u, bytesperline: %u\n",
pix->width, pix->height, crop->width, crop->height,
pix->bytesperline);
/*
* Calculate minimum width and height according to the configured
* camera input interface crop rectangle and the resizer's capabilities.
*/
sc_hrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->width) - 3));
sc_vrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->height) - 1));
wmin = max_t(u32, pix_lim->min_out_width, crop->width / sc_hrmax);
wmin = round_up(wmin, pix_lim->out_width_align);
hmin = max_t(u32, 8, crop->height / sc_vrmax);
hmin = round_up(hmin, 8);
v4l_bound_align_image(&pix->width, wmin, pix_lim->max_sc_out_width,
ffs(pix_lim->out_width_align) - 1,
&pix->height, hmin, pix_lim->max_height, 0, 0);
pix->bytesperline = pix->width * fmt->ybpp;
pix->sizeimage = (pix->width * pix->height * fmt->depth) / 8;
pix->pixelformat = fmt->fourcc;
pix->colorspace = V4L2_COLORSPACE_JPEG;
pix->field = V4L2_FIELD_NONE;
pr_debug("%ux%u, wmin: %d, hmin: %d, sc_hrmax: %d, sc_vrmax: %d\n",
pix->width, pix->height, wmin, hmin, sc_hrmax, sc_vrmax);
return 0;
}
static int s3c_camif_vidioc_try_fmt(struct file *file, void *priv,
struct v4l2_format *f)
{
struct camif_vp *vp = video_drvdata(file);
return __camif_video_try_format(vp, &f->fmt.pix, NULL);
}
static int s3c_camif_vidioc_s_fmt(struct file *file, void *priv,
struct v4l2_format *f)
{
struct v4l2_pix_format *pix = &f->fmt.pix;
struct camif_vp *vp = video_drvdata(file);
struct camif_frame *out_frame = &vp->out_frame;
const struct camif_fmt *fmt = NULL;
int ret;
pr_debug("[vp%d]\n", vp->id);
if (vb2_is_busy(&vp->vb_queue))
return -EBUSY;
ret = __camif_video_try_format(vp, &f->fmt.pix, &fmt);
if (ret < 0)
return ret;
vp->out_fmt = fmt;
vp->payload = pix->sizeimage;
out_frame->f_width = pix->width;
out_frame->f_height = pix->height;
/* Reset composition rectangle */
out_frame->rect.width = pix->width;
out_frame->rect.height = pix->height;
out_frame->rect.left = 0;
out_frame->rect.top = 0;
if (vp->owner == NULL)
vp->owner = priv;
pr_debug("%ux%u. payload: %u. fmt: %s. %d %d. sizeimage: %d. bpl: %d\n",
out_frame->f_width, out_frame->f_height, vp->payload, fmt->name,
pix->width * pix->height * fmt->depth, fmt->depth,
pix->sizeimage, pix->bytesperline);
return 0;
}
/* Only check pixel formats at the sensor and the camif subdev pads */
static int camif_pipeline_validate(struct camif_dev *camif)
{
struct v4l2_subdev_format src_fmt;
struct media_pad *pad;
int ret;
/* Retrieve format at the sensor subdev source pad */
pad = media_entity_remote_pad(&camif->pads[0]);
if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
return -EPIPE;
src_fmt.pad = pad->index;
src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
ret = v4l2_subdev_call(camif->sensor.sd, pad, get_fmt, NULL, &src_fmt);
if (ret < 0 && ret != -ENOIOCTLCMD)
return -EPIPE;
if (src_fmt.format.width != camif->mbus_fmt.width ||
src_fmt.format.height != camif->mbus_fmt.height ||
src_fmt.format.code != camif->mbus_fmt.code)
return -EPIPE;
return 0;
}
static int s3c_camif_streamon(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct camif_vp *vp = video_drvdata(file);
struct camif_dev *camif = vp->camif;
struct media_entity *sensor = &camif->sensor.sd->entity;
int ret;
pr_debug("[vp%d]\n", vp->id);
if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (vp->owner && vp->owner != priv)
return -EBUSY;
if (s3c_vp_active(vp))
return 0;
ret = media_pipeline_start(sensor, camif->m_pipeline);
if (ret < 0)
return ret;
ret = camif_pipeline_validate(camif);
if (ret < 0) {
media_pipeline_stop(sensor);
return ret;
}
return vb2_streamon(&vp->vb_queue, type);
}
static int s3c_camif_streamoff(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct camif_vp *vp = video_drvdata(file);
struct camif_dev *camif = vp->camif;
int ret;
pr_debug("[vp%d]\n", vp->id);
if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (vp->owner && vp->owner != priv)
return -EBUSY;
ret = vb2_streamoff(&vp->vb_queue, type);
if (ret == 0)
media_pipeline_stop(&camif->sensor.sd->entity);
return ret;
}
static int s3c_camif_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *rb)
{
struct camif_vp *vp = video_drvdata(file);
int ret;
pr_debug("[vp%d] rb count: %d, owner: %p, priv: %p\n",
vp->id, rb->count, vp->owner, priv);
if (vp->owner && vp->owner != priv)
return -EBUSY;
if (rb->count)
rb->count = max_t(u32, CAMIF_REQ_BUFS_MIN, rb->count);
else
vp->owner = NULL;
ret = vb2_reqbufs(&vp->vb_queue, rb);
if (ret < 0)
return ret;
if (rb->count && rb->count < CAMIF_REQ_BUFS_MIN) {
rb->count = 0;
vb2_reqbufs(&vp->vb_queue, rb);
ret = -ENOMEM;
}
vp->reqbufs_count = rb->count;
if (vp->owner == NULL && rb->count > 0)
vp->owner = priv;
return ret;
}
static int s3c_camif_querybuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct camif_vp *vp = video_drvdata(file);
return vb2_querybuf(&vp->vb_queue, buf);
}
static int s3c_camif_qbuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct camif_vp *vp = video_drvdata(file);
pr_debug("[vp%d]\n", vp->id);
if (vp->owner && vp->owner != priv)
return -EBUSY;
return vb2_qbuf(&vp->vb_queue, vp->vdev.v4l2_dev->mdev, buf);
}
static int s3c_camif_dqbuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct camif_vp *vp = video_drvdata(file);
pr_debug("[vp%d] sequence: %d\n", vp->id, vp->frame_sequence);
if (vp->owner && vp->owner != priv)
return -EBUSY;
return vb2_dqbuf(&vp->vb_queue, buf, file->f_flags & O_NONBLOCK);
}
static int s3c_camif_create_bufs(struct file *file, void *priv,
struct v4l2_create_buffers *create)
{
struct camif_vp *vp = video_drvdata(file);
int ret;
if (vp->owner && vp->owner != priv)
return -EBUSY;
create->count = max_t(u32, 1, create->count);
ret = vb2_create_bufs(&vp->vb_queue, create);
if (!ret && vp->owner == NULL)
vp->owner = priv;
return ret;
}
static int s3c_camif_prepare_buf(struct file *file, void *priv,
struct v4l2_buffer *b)
{
struct camif_vp *vp = video_drvdata(file);
return vb2_prepare_buf(&vp->vb_queue, vp->vdev.v4l2_dev->mdev, b);
}
static int s3c_camif_g_selection(struct file *file, void *priv,
struct v4l2_selection *sel)
{
struct camif_vp *vp = video_drvdata(file);
if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
switch (sel->target) {
case V4L2_SEL_TGT_COMPOSE_BOUNDS:
case V4L2_SEL_TGT_COMPOSE_DEFAULT:
sel->r.left = 0;
sel->r.top = 0;
sel->r.width = vp->out_frame.f_width;
sel->r.height = vp->out_frame.f_height;
return 0;
case V4L2_SEL_TGT_COMPOSE:
sel->r = vp->out_frame.rect;
return 0;
}
return -EINVAL;
}
static void __camif_try_compose(struct camif_dev *camif, struct camif_vp *vp,
struct v4l2_rect *r)
{
/* s3c244x doesn't support composition */
if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV) {
*r = vp->out_frame.rect;
return;
}
/* TODO: s3c64xx */
}
static int s3c_camif_s_selection(struct file *file, void *priv,
struct v4l2_selection *sel)
{
struct camif_vp *vp = video_drvdata(file);
struct camif_dev *camif = vp->camif;
struct v4l2_rect rect = sel->r;
unsigned long flags;
if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
sel->target != V4L2_SEL_TGT_COMPOSE)
return -EINVAL;
__camif_try_compose(camif, vp, &rect);
sel->r = rect;
spin_lock_irqsave(&camif->slock, flags);
vp->out_frame.rect = rect;
vp->state |= ST_VP_CONFIG;
spin_unlock_irqrestore(&camif->slock, flags);
pr_debug("type: %#x, target: %#x, flags: %#x, (%d,%d)/%dx%d\n",
sel->type, sel->target, sel->flags,
sel->r.left, sel->r.top, sel->r.width, sel->r.height);
return 0;
}
static const struct v4l2_ioctl_ops s3c_camif_ioctl_ops = {
.vidioc_querycap = s3c_camif_vidioc_querycap,
.vidioc_enum_input = s3c_camif_vidioc_enum_input,
.vidioc_g_input = s3c_camif_vidioc_g_input,
.vidioc_s_input = s3c_camif_vidioc_s_input,
.vidioc_enum_fmt_vid_cap = s3c_camif_vidioc_enum_fmt,
.vidioc_try_fmt_vid_cap = s3c_camif_vidioc_try_fmt,
.vidioc_s_fmt_vid_cap = s3c_camif_vidioc_s_fmt,
.vidioc_g_fmt_vid_cap = s3c_camif_vidioc_g_fmt,
.vidioc_g_selection = s3c_camif_g_selection,
.vidioc_s_selection = s3c_camif_s_selection,
.vidioc_reqbufs = s3c_camif_reqbufs,
.vidioc_querybuf = s3c_camif_querybuf,
.vidioc_prepare_buf = s3c_camif_prepare_buf,
.vidioc_create_bufs = s3c_camif_create_bufs,
.vidioc_qbuf = s3c_camif_qbuf,
.vidioc_dqbuf = s3c_camif_dqbuf,
.vidioc_streamon = s3c_camif_streamon,
.vidioc_streamoff = s3c_camif_streamoff,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
.vidioc_log_status = v4l2_ctrl_log_status,
};
/*
* Video node controls
*/
static int s3c_camif_video_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct camif_vp *vp = ctrl->priv;
struct camif_dev *camif = vp->camif;
unsigned long flags;
pr_debug("[vp%d] ctrl: %s, value: %d\n", vp->id,
ctrl->name, ctrl->val);
spin_lock_irqsave(&camif->slock, flags);
switch (ctrl->id) {
case V4L2_CID_HFLIP:
vp->hflip = ctrl->val;
break;
case V4L2_CID_VFLIP:
vp->vflip = ctrl->val;
break;
}
vp->state |= ST_VP_CONFIG;
spin_unlock_irqrestore(&camif->slock, flags);
return 0;
}
/* Codec and preview video node control ops */
static const struct v4l2_ctrl_ops s3c_camif_video_ctrl_ops = {
.s_ctrl = s3c_camif_video_s_ctrl,
};
int s3c_camif_register_video_node(struct camif_dev *camif, int idx)
{
struct camif_vp *vp = &camif->vp[idx];
struct vb2_queue *q = &vp->vb_queue;
struct video_device *vfd = &vp->vdev;
struct v4l2_ctrl *ctrl;
int ret;
memset(vfd, 0, sizeof(*vfd));
snprintf(vfd->name, sizeof(vfd->name), "camif-%s",
vp->id == 0 ? "codec" : "preview");
vfd->fops = &s3c_camif_fops;
vfd->ioctl_ops = &s3c_camif_ioctl_ops;
vfd->v4l2_dev = &camif->v4l2_dev;
vfd->minor = -1;
vfd->release = video_device_release_empty;
vfd->lock = &camif->lock;
vp->reqbufs_count = 0;
INIT_LIST_HEAD(&vp->pending_buf_q);
INIT_LIST_HEAD(&vp->active_buf_q);
memset(q, 0, sizeof(*q));
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
q->io_modes = VB2_MMAP | VB2_USERPTR;
q->ops = &s3c_camif_qops;
q->mem_ops = &vb2_dma_contig_memops;
q->buf_struct_size = sizeof(struct camif_buffer);
q->drv_priv = vp;
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
q->lock = &vp->camif->lock;
q->dev = camif->v4l2_dev.dev;
ret = vb2_queue_init(q);
if (ret)
goto err_vd_rel;
vp->pad.flags = MEDIA_PAD_FL_SINK;
ret = media_entity_pads_init(&vfd->entity, 1, &vp->pad);
if (ret)
goto err_vd_rel;
video_set_drvdata(vfd, vp);
v4l2_ctrl_handler_init(&vp->ctrl_handler, 1);
ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
if (ctrl)
ctrl->priv = vp;
ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
if (ctrl)
ctrl->priv = vp;
ret = vp->ctrl_handler.error;
if (ret < 0)
goto err_me_cleanup;
vfd->ctrl_handler = &vp->ctrl_handler;
ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
if (ret)
goto err_ctrlh_free;
v4l2_info(&camif->v4l2_dev, "registered %s as /dev/%s\n",
vfd->name, video_device_node_name(vfd));
return 0;
err_ctrlh_free:
v4l2_ctrl_handler_free(&vp->ctrl_handler);
err_me_cleanup:
media_entity_cleanup(&vfd->entity);
err_vd_rel:
video_device_release(vfd);
return ret;
}
void s3c_camif_unregister_video_node(struct camif_dev *camif, int idx)
{
struct video_device *vfd = &camif->vp[idx].vdev;
if (video_is_registered(vfd)) {
video_unregister_device(vfd);
media_entity_cleanup(&vfd->entity);
v4l2_ctrl_handler_free(vfd->ctrl_handler);
}
}
/* Media bus pixel formats supported at the camif input */
static const u32 camif_mbus_formats[] = {
MEDIA_BUS_FMT_YUYV8_2X8,
MEDIA_BUS_FMT_YVYU8_2X8,
MEDIA_BUS_FMT_UYVY8_2X8,
MEDIA_BUS_FMT_VYUY8_2X8,
};
/*
* Camera input interface subdev operations
*/
static int s3c_camif_subdev_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index >= ARRAY_SIZE(camif_mbus_formats))
return -EINVAL;
code->code = camif_mbus_formats[code->index];
return 0;
}
static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct camif_dev *camif = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *mf = &fmt->format;
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
fmt->format = *mf;
return 0;
}
mutex_lock(&camif->lock);
switch (fmt->pad) {
case CAMIF_SD_PAD_SINK:
/* full camera input pixel size */
*mf = camif->mbus_fmt;
break;
case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
/* crop rectangle at camera interface input */
mf->width = camif->camif_crop.width;
mf->height = camif->camif_crop.height;
mf->code = camif->mbus_fmt.code;
break;
}
mutex_unlock(&camif->lock);
mf->field = V4L2_FIELD_NONE;
mf->colorspace = V4L2_COLORSPACE_JPEG;
return 0;
}
static void __camif_subdev_try_format(struct camif_dev *camif,
struct v4l2_mbus_framefmt *mf, int pad)
{
const struct s3c_camif_variant *variant = camif->variant;
const struct vp_pix_limits *pix_lim;
unsigned int i;
/* FIXME: constraints against codec or preview path ? */
pix_lim = &variant->vp_pix_limits[VP_CODEC];
for (i = 0; i < ARRAY_SIZE(camif_mbus_formats); i++)
if (camif_mbus_formats[i] == mf->code)
break;
if (i == ARRAY_SIZE(camif_mbus_formats))
mf->code = camif_mbus_formats[0];
if (pad == CAMIF_SD_PAD_SINK) {
v4l_bound_align_image(&mf->width, 8, CAMIF_MAX_PIX_WIDTH,
ffs(pix_lim->out_width_align) - 1,
&mf->height, 8, CAMIF_MAX_PIX_HEIGHT, 0,
0);
} else {
struct v4l2_rect *crop = &camif->camif_crop;
v4l_bound_align_image(&mf->width, 8, crop->width,
ffs(pix_lim->out_width_align) - 1,
&mf->height, 8, crop->height,
0, 0);
}
v4l2_dbg(1, debug, &camif->subdev, "%ux%u\n", mf->width, mf->height);
}
static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct camif_dev *camif = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *mf = &fmt->format;
struct v4l2_rect *crop = &camif->camif_crop;
int i;
v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %ux%u\n",
fmt->pad, mf->code, mf->width, mf->height);
mf->field = V4L2_FIELD_NONE;
mf->colorspace = V4L2_COLORSPACE_JPEG;
mutex_lock(&camif->lock);
/*
* No pixel format change at the camera input is allowed
* while streaming.
*/
if (vb2_is_busy(&camif->vp[VP_CODEC].vb_queue) ||
vb2_is_busy(&camif->vp[VP_PREVIEW].vb_queue)) {
mutex_unlock(&camif->lock);
return -EBUSY;
}
__camif_subdev_try_format(camif, mf, fmt->pad);
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
*mf = fmt->format;
mutex_unlock(&camif->lock);
return 0;
}
switch (fmt->pad) {
case CAMIF_SD_PAD_SINK:
camif->mbus_fmt = *mf;
/* Reset sink crop rectangle. */
crop->width = mf->width;
crop->height = mf->height;
crop->left = 0;
crop->top = 0;
/*
* Reset source format (the camif's crop rectangle)
* and the video output resolution.
*/
for (i = 0; i < CAMIF_VP_NUM; i++) {
struct camif_frame *frame = &camif->vp[i].out_frame;
frame->rect = *crop;
frame->f_width = mf->width;
frame->f_height = mf->height;
}
break;
case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
/* Pixel format can be only changed on the sink pad. */
mf->code = camif->mbus_fmt.code;
mf->width = crop->width;
mf->height = crop->height;
break;
}
mutex_unlock(&camif->lock);
return 0;
}
static int s3c_camif_subdev_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_selection *sel)
{
struct camif_dev *camif = v4l2_get_subdevdata(sd);
struct v4l2_rect *crop = &camif->camif_crop;
struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
if ((sel->target != V4L2_SEL_TGT_CROP &&
sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
sel->pad != CAMIF_SD_PAD_SINK)
return -EINVAL;
if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
return 0;
}
mutex_lock(&camif->lock);
if (sel->target == V4L2_SEL_TGT_CROP) {
sel->r = *crop;
} else { /* crop bounds */
sel->r.width = mf->width;
sel->r.height = mf->height;
sel->r.left = 0;
sel->r.top = 0;
}
mutex_unlock(&camif->lock);
v4l2_dbg(1, debug, sd, "%s: crop: (%d,%d) %dx%d, size: %ux%u\n",
__func__, crop->left, crop->top, crop->width,
crop->height, mf->width, mf->height);
return 0;
}
static void __camif_try_crop(struct camif_dev *camif, struct v4l2_rect *r)
{
struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
const struct camif_pix_limits *pix_lim = &camif->variant->pix_limits;
unsigned int left = 2 * r->left;
unsigned int top = 2 * r->top;
/*
* Following constraints must be met:
* - r->width + 2 * r->left = mf->width;
* - r->height + 2 * r->top = mf->height;
* - crop rectangle size and position must be aligned
* to 8 or 2 pixels, depending on SoC version.
*/
v4l_bound_align_image(&r->width, 0, mf->width,
ffs(pix_lim->win_hor_offset_align) - 1,
&r->height, 0, mf->height, 1, 0);
v4l_bound_align_image(&left, 0, mf->width - r->width,
ffs(pix_lim->win_hor_offset_align),
&top, 0, mf->height - r->height, 2, 0);
r->left = left / 2;
r->top = top / 2;
r->width = mf->width - left;
r->height = mf->height - top;
/*
* Make sure we either downscale or upscale both the pixel
* width and height. Just return current crop rectangle if
* this scaler constraint is not met.
*/
if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV &&
camif_is_streaming(camif)) {
unsigned int i;
for (i = 0; i < CAMIF_VP_NUM; i++) {
struct v4l2_rect *or = &camif->vp[i].out_frame.rect;
if ((or->width > r->width) == (or->height > r->height))
continue;
*r = camif->camif_crop;
pr_debug("Width/height scaling direction limitation\n");
break;
}
}
v4l2_dbg(1, debug, &camif->v4l2_dev, "crop: (%d,%d)/%dx%d, fmt: %ux%u\n",
r->left, r->top, r->width, r->height, mf->width, mf->height);
}
static int s3c_camif_subdev_set_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_selection *sel)
{
struct camif_dev *camif = v4l2_get_subdevdata(sd);
struct v4l2_rect *crop = &camif->camif_crop;
struct camif_scaler scaler;
if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != CAMIF_SD_PAD_SINK)
return -EINVAL;
mutex_lock(&camif->lock);
__camif_try_crop(camif, &sel->r);
if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
*v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
} else {
unsigned long flags;
unsigned int i;
spin_lock_irqsave(&camif->slock, flags);
*crop = sel->r;
for (i = 0; i < CAMIF_VP_NUM; i++) {
struct camif_vp *vp = &camif->vp[i];
scaler = vp->scaler;
if (s3c_camif_get_scaler_config(vp, &scaler))
continue;
vp->scaler = scaler;
vp->state |= ST_VP_CONFIG;
}
spin_unlock_irqrestore(&camif->slock, flags);
}
mutex_unlock(&camif->lock);
v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %u, f_h: %u\n",
__func__, crop->left, crop->top, crop->width, crop->height,
camif->mbus_fmt.width, camif->mbus_fmt.height);
return 0;
}
static const struct v4l2_subdev_pad_ops s3c_camif_subdev_pad_ops = {
.enum_mbus_code = s3c_camif_subdev_enum_mbus_code,
.get_selection = s3c_camif_subdev_get_selection,
.set_selection = s3c_camif_subdev_set_selection,
.get_fmt = s3c_camif_subdev_get_fmt,
.set_fmt = s3c_camif_subdev_set_fmt,
};
static const struct v4l2_subdev_ops s3c_camif_subdev_ops = {
.pad = &s3c_camif_subdev_pad_ops,
};
static int s3c_camif_subdev_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct camif_dev *camif = container_of(ctrl->handler, struct camif_dev,
ctrl_handler);
unsigned long flags;
spin_lock_irqsave(&camif->slock, flags);
switch (ctrl->id) {
case V4L2_CID_COLORFX:
camif->colorfx = camif->ctrl_colorfx->val;
/* Set Cb, Cr */
switch (ctrl->val) {
case V4L2_COLORFX_SEPIA:
camif->colorfx_cb = 115;
camif->colorfx_cr = 145;
break;
case V4L2_COLORFX_SET_CBCR:
camif->colorfx_cb = camif->ctrl_colorfx_cbcr->val >> 8;
camif->colorfx_cr = camif->ctrl_colorfx_cbcr->val & 0xff;
break;
default:
/* for V4L2_COLORFX_BW and others */
camif->colorfx_cb = 128;
camif->colorfx_cr = 128;
}
break;
case V4L2_CID_TEST_PATTERN:
camif->test_pattern = camif->ctrl_test_pattern->val;
break;
default:
WARN_ON(1);
}
camif->vp[VP_CODEC].state |= ST_VP_CONFIG;
camif->vp[VP_PREVIEW].state |= ST_VP_CONFIG;
spin_unlock_irqrestore(&camif->slock, flags);
return 0;
}
static const struct v4l2_ctrl_ops s3c_camif_subdev_ctrl_ops = {
.s_ctrl = s3c_camif_subdev_s_ctrl,
};
static const char * const s3c_camif_test_pattern_menu[] = {
"Disabled",
"Color bars",
"Horizontal increment",
"Vertical increment",
};
int s3c_camif_create_subdev(struct camif_dev *camif)
{
struct v4l2_ctrl_handler *handler = &camif->ctrl_handler;
struct v4l2_subdev *sd = &camif->subdev;
int ret;
v4l2_subdev_init(sd, &s3c_camif_subdev_ops);
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
strscpy(sd->name, "S3C-CAMIF", sizeof(sd->name));
camif->pads[CAMIF_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
camif->pads[CAMIF_SD_PAD_SOURCE_C].flags = MEDIA_PAD_FL_SOURCE;
camif->pads[CAMIF_SD_PAD_SOURCE_P].flags = MEDIA_PAD_FL_SOURCE;
ret = media_entity_pads_init(&sd->entity, CAMIF_SD_PADS_NUM,
camif->pads);
if (ret)
return ret;
v4l2_ctrl_handler_init(handler, 3);
camif->ctrl_test_pattern = v4l2_ctrl_new_std_menu_items(handler,
&s3c_camif_subdev_ctrl_ops, V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(s3c_camif_test_pattern_menu) - 1, 0, 0,
s3c_camif_test_pattern_menu);
if (camif->variant->has_img_effect) {
camif->ctrl_colorfx = v4l2_ctrl_new_std_menu(handler,
&s3c_camif_subdev_ctrl_ops,
V4L2_CID_COLORFX, V4L2_COLORFX_SET_CBCR,
~0x981f, V4L2_COLORFX_NONE);
camif->ctrl_colorfx_cbcr = v4l2_ctrl_new_std(handler,
&s3c_camif_subdev_ctrl_ops,
V4L2_CID_COLORFX_CBCR, 0, 0xffff, 1, 0);
}
if (handler->error) {
v4l2_ctrl_handler_free(handler);
media_entity_cleanup(&sd->entity);
return handler->error;
}
if (camif->variant->has_img_effect)
v4l2_ctrl_auto_cluster(2, &camif->ctrl_colorfx,
V4L2_COLORFX_SET_CBCR, false);
sd->ctrl_handler = handler;
v4l2_set_subdevdata(sd, camif);
return 0;
}
void s3c_camif_unregister_subdev(struct camif_dev *camif)
{
struct v4l2_subdev *sd = &camif->subdev;
/* Return if not registered */
if (v4l2_get_subdevdata(sd) == NULL)
return;
v4l2_device_unregister_subdev(sd);
media_entity_cleanup(&sd->entity);
v4l2_ctrl_handler_free(&camif->ctrl_handler);
v4l2_set_subdevdata(sd, NULL);
}
int s3c_camif_set_defaults(struct camif_dev *camif)
{
unsigned int ip_rev = camif->variant->ip_revision;
int i;
for (i = 0; i < CAMIF_VP_NUM; i++) {
struct camif_vp *vp = &camif->vp[i];
struct camif_frame *f = &vp->out_frame;
vp->camif = camif;
vp->id = i;
vp->offset = camif->variant->vp_offset;
if (ip_rev == S3C244X_CAMIF_IP_REV)
vp->fmt_flags = i ? FMT_FL_S3C24XX_PREVIEW :
FMT_FL_S3C24XX_CODEC;
else
vp->fmt_flags = FMT_FL_S3C64XX;
vp->out_fmt = s3c_camif_find_format(vp, NULL, 0);
BUG_ON(vp->out_fmt == NULL);
memset(f, 0, sizeof(*f));
f->f_width = CAMIF_DEF_WIDTH;
f->f_height = CAMIF_DEF_HEIGHT;
f->rect.width = CAMIF_DEF_WIDTH;
f->rect.height = CAMIF_DEF_HEIGHT;
/* Scaler is always enabled */
vp->scaler.enable = 1;
vp->payload = (f->f_width * f->f_height *
vp->out_fmt->depth) / 8;
}
memset(&camif->mbus_fmt, 0, sizeof(camif->mbus_fmt));
camif->mbus_fmt.width = CAMIF_DEF_WIDTH;
camif->mbus_fmt.height = CAMIF_DEF_HEIGHT;
camif->mbus_fmt.code = camif_mbus_formats[0];
memset(&camif->camif_crop, 0, sizeof(camif->camif_crop));
camif->camif_crop.width = CAMIF_DEF_WIDTH;
camif->camif_crop.height = CAMIF_DEF_HEIGHT;
return 0;
}
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