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fimc-lite.c
1681 lines (1395 loc) · 43.2 KB
/
fimc-lite.c
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/*
* Samsung EXYNOS FIMC-LITE (camera host interface) driver
*
* Copyright (C) 2012 Samsung Electronics Co., Ltd.
* Sylwester Nawrocki <s.nawrocki@samsung.com>
*
* 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/device.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-core.h>
#include <media/videobuf2-dma-contig.h>
#include <media/s5p_fimc.h>
#include "fimc-mdevice.h"
#include "fimc-core.h"
#include "fimc-lite.h"
#include "fimc-lite-reg.h"
static int debug;
module_param(debug, int, 0644);
static const struct fimc_fmt fimc_lite_formats[] = {
{
.name = "YUV 4:2:2 packed, YCbYCr",
.fourcc = V4L2_PIX_FMT_YUYV,
.depth = { 16 },
.color = FIMC_FMT_YCBYCR422,
.memplanes = 1,
.mbus_code = V4L2_MBUS_FMT_YUYV8_2X8,
}, {
.name = "YUV 4:2:2 packed, CbYCrY",
.fourcc = V4L2_PIX_FMT_UYVY,
.depth = { 16 },
.color = FIMC_FMT_CBYCRY422,
.memplanes = 1,
.mbus_code = V4L2_MBUS_FMT_UYVY8_2X8,
}, {
.name = "YUV 4:2:2 packed, CrYCbY",
.fourcc = V4L2_PIX_FMT_VYUY,
.depth = { 16 },
.color = FIMC_FMT_CRYCBY422,
.memplanes = 1,
.mbus_code = V4L2_MBUS_FMT_VYUY8_2X8,
}, {
.name = "YUV 4:2:2 packed, YCrYCb",
.fourcc = V4L2_PIX_FMT_YVYU,
.depth = { 16 },
.color = FIMC_FMT_YCRYCB422,
.memplanes = 1,
.mbus_code = V4L2_MBUS_FMT_YVYU8_2X8,
}, {
.name = "RAW8 (GRBG)",
.fourcc = V4L2_PIX_FMT_SGRBG8,
.depth = { 8 },
.color = FIMC_FMT_RAW8,
.memplanes = 1,
.mbus_code = V4L2_MBUS_FMT_SGRBG8_1X8,
}, {
.name = "RAW10 (GRBG)",
.fourcc = V4L2_PIX_FMT_SGRBG10,
.depth = { 10 },
.color = FIMC_FMT_RAW10,
.memplanes = 1,
.mbus_code = V4L2_MBUS_FMT_SGRBG10_1X10,
}, {
.name = "RAW12 (GRBG)",
.fourcc = V4L2_PIX_FMT_SGRBG12,
.depth = { 12 },
.color = FIMC_FMT_RAW12,
.memplanes = 1,
.mbus_code = V4L2_MBUS_FMT_SGRBG12_1X12,
},
};
/**
* fimc_lite_find_format - lookup fimc color format by fourcc or media bus code
* @pixelformat: fourcc to match, ignored if null
* @mbus_code: media bus code to match, ignored if null
* @index: index to the fimc_lite_formats array, ignored if negative
*/
static const struct fimc_fmt *fimc_lite_find_format(const u32 *pixelformat,
const u32 *mbus_code, int index)
{
const struct fimc_fmt *fmt, *def_fmt = NULL;
unsigned int i;
int id = 0;
if (index >= (int)ARRAY_SIZE(fimc_lite_formats))
return NULL;
for (i = 0; i < ARRAY_SIZE(fimc_lite_formats); ++i) {
fmt = &fimc_lite_formats[i];
if (pixelformat && fmt->fourcc == *pixelformat)
return fmt;
if (mbus_code && fmt->mbus_code == *mbus_code)
return fmt;
if (index == id)
def_fmt = fmt;
id++;
}
return def_fmt;
}
static int fimc_lite_hw_init(struct fimc_lite *fimc, bool isp_output)
{
struct fimc_pipeline *pipeline = &fimc->pipeline;
struct v4l2_subdev *sensor;
struct fimc_sensor_info *si;
unsigned long flags;
sensor = isp_output ? fimc->sensor : pipeline->subdevs[IDX_SENSOR];
if (sensor == NULL)
return -ENXIO;
if (fimc->fmt == NULL)
return -EINVAL;
/* Get sensor configuration data from the sensor subdev */
si = v4l2_get_subdev_hostdata(sensor);
spin_lock_irqsave(&fimc->slock, flags);
flite_hw_set_camera_bus(fimc, &si->pdata);
flite_hw_set_source_format(fimc, &fimc->inp_frame);
flite_hw_set_window_offset(fimc, &fimc->inp_frame);
flite_hw_set_output_dma(fimc, &fimc->out_frame, !isp_output);
flite_hw_set_interrupt_mask(fimc);
flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
if (debug > 0)
flite_hw_dump_regs(fimc, __func__);
spin_unlock_irqrestore(&fimc->slock, flags);
return 0;
}
/*
* Reinitialize the driver so it is ready to start the streaming again.
* Set fimc->state to indicate stream off and the hardware shut down state.
* If not suspending (@suspend is false), return any buffers to videobuf2.
* Otherwise put any owned buffers onto the pending buffers queue, so they
* can be re-spun when the device is being resumed. Also perform FIMC
* software reset and disable streaming on the whole pipeline if required.
*/
static int fimc_lite_reinit(struct fimc_lite *fimc, bool suspend)
{
struct flite_buffer *buf;
unsigned long flags;
bool streaming;
spin_lock_irqsave(&fimc->slock, flags);
streaming = fimc->state & (1 << ST_SENSOR_STREAM);
fimc->state &= ~(1 << ST_FLITE_RUN | 1 << ST_FLITE_OFF |
1 << ST_FLITE_STREAM | 1 << ST_SENSOR_STREAM);
if (suspend)
fimc->state |= (1 << ST_FLITE_SUSPENDED);
else
fimc->state &= ~(1 << ST_FLITE_PENDING |
1 << ST_FLITE_SUSPENDED);
/* Release unused buffers */
while (!suspend && !list_empty(&fimc->pending_buf_q)) {
buf = fimc_lite_pending_queue_pop(fimc);
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
}
/* If suspending put unused buffers onto pending queue */
while (!list_empty(&fimc->active_buf_q)) {
buf = fimc_lite_active_queue_pop(fimc);
if (suspend)
fimc_lite_pending_queue_add(fimc, buf);
else
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
}
spin_unlock_irqrestore(&fimc->slock, flags);
flite_hw_reset(fimc);
if (!streaming)
return 0;
return fimc_pipeline_call(fimc, set_stream, &fimc->pipeline, 0);
}
static int fimc_lite_stop_capture(struct fimc_lite *fimc, bool suspend)
{
unsigned long flags;
if (!fimc_lite_active(fimc))
return 0;
spin_lock_irqsave(&fimc->slock, flags);
set_bit(ST_FLITE_OFF, &fimc->state);
flite_hw_capture_stop(fimc);
spin_unlock_irqrestore(&fimc->slock, flags);
wait_event_timeout(fimc->irq_queue,
!test_bit(ST_FLITE_OFF, &fimc->state),
(2*HZ/10)); /* 200 ms */
return fimc_lite_reinit(fimc, suspend);
}
/* Must be called with fimc.slock spinlock held. */
static void fimc_lite_config_update(struct fimc_lite *fimc)
{
flite_hw_set_window_offset(fimc, &fimc->inp_frame);
flite_hw_set_dma_window(fimc, &fimc->out_frame);
flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
clear_bit(ST_FLITE_CONFIG, &fimc->state);
}
static irqreturn_t flite_irq_handler(int irq, void *priv)
{
struct fimc_lite *fimc = priv;
struct flite_buffer *vbuf;
unsigned long flags;
struct timeval *tv;
struct timespec ts;
u32 intsrc;
spin_lock_irqsave(&fimc->slock, flags);
intsrc = flite_hw_get_interrupt_source(fimc);
flite_hw_clear_pending_irq(fimc);
if (test_and_clear_bit(ST_FLITE_OFF, &fimc->state)) {
wake_up(&fimc->irq_queue);
goto done;
}
if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_OVERFLOW) {
clear_bit(ST_FLITE_RUN, &fimc->state);
fimc->events.data_overflow++;
}
if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_LASTCAPEND) {
flite_hw_clear_last_capture_end(fimc);
clear_bit(ST_FLITE_STREAM, &fimc->state);
wake_up(&fimc->irq_queue);
}
if (atomic_read(&fimc->out_path) != FIMC_IO_DMA)
goto done;
if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMSTART) &&
test_bit(ST_FLITE_RUN, &fimc->state) &&
!list_empty(&fimc->active_buf_q) &&
!list_empty(&fimc->pending_buf_q)) {
vbuf = fimc_lite_active_queue_pop(fimc);
ktime_get_ts(&ts);
tv = &vbuf->vb.v4l2_buf.timestamp;
tv->tv_sec = ts.tv_sec;
tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
vbuf->vb.v4l2_buf.sequence = fimc->frame_count++;
vb2_buffer_done(&vbuf->vb, VB2_BUF_STATE_DONE);
vbuf = fimc_lite_pending_queue_pop(fimc);
flite_hw_set_output_addr(fimc, vbuf->paddr);
fimc_lite_active_queue_add(fimc, vbuf);
}
if (test_bit(ST_FLITE_CONFIG, &fimc->state))
fimc_lite_config_update(fimc);
if (list_empty(&fimc->pending_buf_q)) {
flite_hw_capture_stop(fimc);
clear_bit(ST_FLITE_STREAM, &fimc->state);
}
done:
set_bit(ST_FLITE_RUN, &fimc->state);
spin_unlock_irqrestore(&fimc->slock, flags);
return IRQ_HANDLED;
}
static int start_streaming(struct vb2_queue *q, unsigned int count)
{
struct fimc_lite *fimc = q->drv_priv;
int ret;
fimc->frame_count = 0;
ret = fimc_lite_hw_init(fimc, false);
if (ret) {
fimc_lite_reinit(fimc, false);
return ret;
}
set_bit(ST_FLITE_PENDING, &fimc->state);
if (!list_empty(&fimc->active_buf_q) &&
!test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
flite_hw_capture_start(fimc);
if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
fimc_pipeline_call(fimc, set_stream,
&fimc->pipeline, 1);
}
if (debug > 0)
flite_hw_dump_regs(fimc, __func__);
return 0;
}
static int stop_streaming(struct vb2_queue *q)
{
struct fimc_lite *fimc = q->drv_priv;
if (!fimc_lite_active(fimc))
return -EINVAL;
return fimc_lite_stop_capture(fimc, false);
}
static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], void *allocators[])
{
const struct v4l2_pix_format_mplane *pixm = NULL;
struct fimc_lite *fimc = vq->drv_priv;
struct flite_frame *frame = &fimc->out_frame;
const struct fimc_fmt *fmt = fimc->fmt;
unsigned long wh;
int i;
if (pfmt) {
pixm = &pfmt->fmt.pix_mp;
fmt = fimc_lite_find_format(&pixm->pixelformat, NULL, -1);
wh = pixm->width * pixm->height;
} else {
wh = frame->f_width * frame->f_height;
}
if (fmt == NULL)
return -EINVAL;
*num_planes = fmt->memplanes;
for (i = 0; i < fmt->memplanes; i++) {
unsigned int size = (wh * fmt->depth[i]) / 8;
if (pixm)
sizes[i] = max(size, pixm->plane_fmt[i].sizeimage);
else
sizes[i] = size;
allocators[i] = fimc->alloc_ctx;
}
return 0;
}
static int buffer_prepare(struct vb2_buffer *vb)
{
struct vb2_queue *vq = vb->vb2_queue;
struct fimc_lite *fimc = vq->drv_priv;
int i;
if (fimc->fmt == NULL)
return -EINVAL;
for (i = 0; i < fimc->fmt->memplanes; i++) {
unsigned long size = fimc->payload[i];
if (vb2_plane_size(vb, i) < size) {
v4l2_err(&fimc->vfd,
"User buffer too small (%ld < %ld)\n",
vb2_plane_size(vb, i), size);
return -EINVAL;
}
vb2_set_plane_payload(vb, i, size);
}
return 0;
}
static void buffer_queue(struct vb2_buffer *vb)
{
struct flite_buffer *buf
= container_of(vb, struct flite_buffer, vb);
struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
unsigned long flags;
spin_lock_irqsave(&fimc->slock, flags);
buf->paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
!test_bit(ST_FLITE_STREAM, &fimc->state) &&
list_empty(&fimc->active_buf_q)) {
flite_hw_set_output_addr(fimc, buf->paddr);
fimc_lite_active_queue_add(fimc, buf);
} else {
fimc_lite_pending_queue_add(fimc, buf);
}
if (vb2_is_streaming(&fimc->vb_queue) &&
!list_empty(&fimc->pending_buf_q) &&
!test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
flite_hw_capture_start(fimc);
spin_unlock_irqrestore(&fimc->slock, flags);
if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
fimc_pipeline_call(fimc, set_stream,
&fimc->pipeline, 1);
return;
}
spin_unlock_irqrestore(&fimc->slock, flags);
}
static void fimc_lock(struct vb2_queue *vq)
{
struct fimc_lite *fimc = vb2_get_drv_priv(vq);
mutex_lock(&fimc->lock);
}
static void fimc_unlock(struct vb2_queue *vq)
{
struct fimc_lite *fimc = vb2_get_drv_priv(vq);
mutex_unlock(&fimc->lock);
}
static const struct vb2_ops fimc_lite_qops = {
.queue_setup = queue_setup,
.buf_prepare = buffer_prepare,
.buf_queue = buffer_queue,
.wait_prepare = fimc_unlock,
.wait_finish = fimc_lock,
.start_streaming = start_streaming,
.stop_streaming = stop_streaming,
};
static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
{
unsigned long flags;
spin_lock_irqsave(&fimc->slock, flags);
memset(&fimc->events, 0, sizeof(fimc->events));
spin_unlock_irqrestore(&fimc->slock, flags);
}
static int fimc_lite_open(struct file *file)
{
struct fimc_lite *fimc = video_drvdata(file);
struct media_entity *me = &fimc->vfd.entity;
int ret;
mutex_lock(&me->parent->graph_mutex);
mutex_lock(&fimc->lock);
if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
ret = -EBUSY;
goto done;
}
set_bit(ST_FLITE_IN_USE, &fimc->state);
ret = pm_runtime_get_sync(&fimc->pdev->dev);
if (ret < 0)
goto done;
ret = v4l2_fh_open(file);
if (ret < 0)
goto done;
if (++fimc->ref_count == 1 &&
atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
ret = fimc_pipeline_call(fimc, open, &fimc->pipeline,
&fimc->vfd.entity, true);
if (ret < 0) {
pm_runtime_put_sync(&fimc->pdev->dev);
fimc->ref_count--;
v4l2_fh_release(file);
clear_bit(ST_FLITE_IN_USE, &fimc->state);
}
fimc_lite_clear_event_counters(fimc);
}
done:
mutex_unlock(&fimc->lock);
mutex_unlock(&me->parent->graph_mutex);
return ret;
}
static int fimc_lite_close(struct file *file)
{
struct fimc_lite *fimc = video_drvdata(file);
int ret;
mutex_lock(&fimc->lock);
if (--fimc->ref_count == 0 &&
atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
clear_bit(ST_FLITE_IN_USE, &fimc->state);
fimc_lite_stop_capture(fimc, false);
fimc_pipeline_call(fimc, close, &fimc->pipeline);
clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
}
pm_runtime_put(&fimc->pdev->dev);
if (fimc->ref_count == 0)
vb2_queue_release(&fimc->vb_queue);
ret = v4l2_fh_release(file);
mutex_unlock(&fimc->lock);
return ret;
}
static unsigned int fimc_lite_poll(struct file *file,
struct poll_table_struct *wait)
{
struct fimc_lite *fimc = video_drvdata(file);
int ret;
if (mutex_lock_interruptible(&fimc->lock))
return POLL_ERR;
ret = vb2_poll(&fimc->vb_queue, file, wait);
mutex_unlock(&fimc->lock);
return ret;
}
static int fimc_lite_mmap(struct file *file, struct vm_area_struct *vma)
{
struct fimc_lite *fimc = video_drvdata(file);
int ret;
if (mutex_lock_interruptible(&fimc->lock))
return -ERESTARTSYS;
ret = vb2_mmap(&fimc->vb_queue, vma);
mutex_unlock(&fimc->lock);
return ret;
}
static const struct v4l2_file_operations fimc_lite_fops = {
.owner = THIS_MODULE,
.open = fimc_lite_open,
.release = fimc_lite_close,
.poll = fimc_lite_poll,
.unlocked_ioctl = video_ioctl2,
.mmap = fimc_lite_mmap,
};
/*
* Format and crop negotiation helpers
*/
static const struct fimc_fmt *fimc_lite_try_format(struct fimc_lite *fimc,
u32 *width, u32 *height,
u32 *code, u32 *fourcc, int pad)
{
struct flite_variant *variant = fimc->variant;
const struct fimc_fmt *fmt;
fmt = fimc_lite_find_format(fourcc, code, 0);
if (WARN_ON(!fmt))
return NULL;
if (code)
*code = fmt->mbus_code;
if (fourcc)
*fourcc = fmt->fourcc;
if (pad == FLITE_SD_PAD_SINK) {
v4l_bound_align_image(width, 8, variant->max_width,
ffs(variant->out_width_align) - 1,
height, 0, variant->max_height, 0, 0);
} else {
v4l_bound_align_image(width, 8, fimc->inp_frame.rect.width,
ffs(variant->out_width_align) - 1,
height, 0, fimc->inp_frame.rect.height,
0, 0);
}
v4l2_dbg(1, debug, &fimc->subdev, "code: 0x%x, %dx%d\n",
code ? *code : 0, *width, *height);
return fmt;
}
static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
{
struct flite_frame *frame = &fimc->inp_frame;
v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
&r->height, 0, frame->f_height, 0, 0);
/* Adjust left/top if cropping rectangle got out of bounds */
r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
r->left = round_down(r->left, fimc->variant->win_hor_offs_align);
r->top = clamp_t(u32, r->top, 0, frame->f_height - r->height);
v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
r->left, r->top, r->width, r->height,
frame->f_width, frame->f_height);
}
static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
{
struct flite_frame *frame = &fimc->out_frame;
struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
/* Scaling is not supported so we enforce compose rectangle size
same as size of the sink crop rectangle. */
r->width = crop_rect->width;
r->height = crop_rect->height;
/* Adjust left/top if the composing rectangle got out of bounds */
r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
r->left = round_down(r->left, fimc->variant->out_hor_offs_align);
r->top = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
r->left, r->top, r->width, r->height,
frame->f_width, frame->f_height);
}
/*
* Video node ioctl operations
*/
static int fimc_vidioc_querycap_capture(struct file *file, void *priv,
struct v4l2_capability *cap)
{
strlcpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
cap->bus_info[0] = 0;
cap->card[0] = 0;
cap->capabilities = V4L2_CAP_STREAMING;
return 0;
}
static int fimc_lite_enum_fmt_mplane(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
const struct fimc_fmt *fmt;
if (f->index >= ARRAY_SIZE(fimc_lite_formats))
return -EINVAL;
fmt = &fimc_lite_formats[f->index];
strlcpy(f->description, fmt->name, sizeof(f->description));
f->pixelformat = fmt->fourcc;
return 0;
}
static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
struct v4l2_format *f)
{
struct fimc_lite *fimc = video_drvdata(file);
struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
struct flite_frame *frame = &fimc->out_frame;
const struct fimc_fmt *fmt = fimc->fmt;
plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
pixm->num_planes = fmt->memplanes;
pixm->pixelformat = fmt->fourcc;
pixm->width = frame->f_width;
pixm->height = frame->f_height;
pixm->field = V4L2_FIELD_NONE;
pixm->colorspace = V4L2_COLORSPACE_JPEG;
return 0;
}
static int fimc_lite_try_fmt(struct fimc_lite *fimc,
struct v4l2_pix_format_mplane *pixm,
const struct fimc_fmt **ffmt)
{
struct flite_variant *variant = fimc->variant;
u32 bpl = pixm->plane_fmt[0].bytesperline;
const struct fimc_fmt *fmt;
fmt = fimc_lite_find_format(&pixm->pixelformat, NULL, 0);
if (WARN_ON(fmt == NULL))
return -EINVAL;
if (ffmt)
*ffmt = fmt;
v4l_bound_align_image(&pixm->width, 8, variant->max_width,
ffs(variant->out_width_align) - 1,
&pixm->height, 0, variant->max_height, 0, 0);
if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
pixm->plane_fmt[0].bytesperline = (pixm->width *
fmt->depth[0]) / 8;
if (pixm->plane_fmt[0].sizeimage == 0)
pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
fmt->depth[0]) / 8;
pixm->num_planes = fmt->memplanes;
pixm->pixelformat = fmt->fourcc;
pixm->colorspace = V4L2_COLORSPACE_JPEG;
pixm->field = V4L2_FIELD_NONE;
return 0;
}
static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
struct v4l2_format *f)
{
struct fimc_lite *fimc = video_drvdata(file);
return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
}
static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
struct v4l2_format *f)
{
struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
struct fimc_lite *fimc = video_drvdata(file);
struct flite_frame *frame = &fimc->out_frame;
const struct fimc_fmt *fmt = NULL;
int ret;
if (vb2_is_busy(&fimc->vb_queue))
return -EBUSY;
ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
if (ret < 0)
return ret;
fimc->fmt = fmt;
fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
pixm->plane_fmt[0].sizeimage);
frame->f_width = pixm->width;
frame->f_height = pixm->height;
return 0;
}
static int fimc_pipeline_validate(struct fimc_lite *fimc)
{
struct v4l2_subdev *sd = &fimc->subdev;
struct v4l2_subdev_format sink_fmt, src_fmt;
struct media_pad *pad;
int ret;
while (1) {
/* Retrieve format at the sink pad */
pad = &sd->entity.pads[0];
if (!(pad->flags & MEDIA_PAD_FL_SINK))
break;
/* Don't call FIMC subdev operation to avoid nested locking */
if (sd == &fimc->subdev) {
struct flite_frame *ff = &fimc->out_frame;
sink_fmt.format.width = ff->f_width;
sink_fmt.format.height = ff->f_height;
sink_fmt.format.code = fimc->fmt->mbus_code;
} else {
sink_fmt.pad = pad->index;
sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
&sink_fmt);
if (ret < 0 && ret != -ENOIOCTLCMD)
return -EPIPE;
}
/* Retrieve format at the source pad */
pad = media_entity_remote_source(pad);
if (pad == NULL ||
media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
break;
sd = media_entity_to_v4l2_subdev(pad->entity);
src_fmt.pad = pad->index;
src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
if (ret < 0 && ret != -ENOIOCTLCMD)
return -EPIPE;
if (src_fmt.format.width != sink_fmt.format.width ||
src_fmt.format.height != sink_fmt.format.height ||
src_fmt.format.code != sink_fmt.format.code)
return -EPIPE;
}
return 0;
}
static int fimc_lite_streamon(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct fimc_lite *fimc = video_drvdata(file);
struct v4l2_subdev *sensor = fimc->pipeline.subdevs[IDX_SENSOR];
struct fimc_pipeline *p = &fimc->pipeline;
int ret;
if (fimc_lite_active(fimc))
return -EBUSY;
ret = media_entity_pipeline_start(&sensor->entity, p->m_pipeline);
if (ret < 0)
return ret;
ret = fimc_pipeline_validate(fimc);
if (ret) {
media_entity_pipeline_stop(&sensor->entity);
return ret;
}
return vb2_streamon(&fimc->vb_queue, type);
}
static int fimc_lite_streamoff(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct fimc_lite *fimc = video_drvdata(file);
struct v4l2_subdev *sd = fimc->pipeline.subdevs[IDX_SENSOR];
int ret;
ret = vb2_streamoff(&fimc->vb_queue, type);
if (ret == 0)
media_entity_pipeline_stop(&sd->entity);
return ret;
}
static int fimc_lite_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *reqbufs)
{
struct fimc_lite *fimc = video_drvdata(file);
int ret;
reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
ret = vb2_reqbufs(&fimc->vb_queue, reqbufs);
if (!ret)
fimc->reqbufs_count = reqbufs->count;
return ret;
}
static int fimc_lite_querybuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct fimc_lite *fimc = video_drvdata(file);
return vb2_querybuf(&fimc->vb_queue, buf);
}
static int fimc_lite_qbuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct fimc_lite *fimc = video_drvdata(file);
return vb2_qbuf(&fimc->vb_queue, buf);
}
static int fimc_lite_dqbuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct fimc_lite *fimc = video_drvdata(file);
return vb2_dqbuf(&fimc->vb_queue, buf, file->f_flags & O_NONBLOCK);
}
static int fimc_lite_create_bufs(struct file *file, void *priv,
struct v4l2_create_buffers *create)
{
struct fimc_lite *fimc = video_drvdata(file);
return vb2_create_bufs(&fimc->vb_queue, create);
}
static int fimc_lite_prepare_buf(struct file *file, void *priv,
struct v4l2_buffer *b)
{
struct fimc_lite *fimc = video_drvdata(file);
return vb2_prepare_buf(&fimc->vb_queue, b);
}
/* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
{
if (a->left < b->left || a->top < b->top)
return 0;
if (a->left + a->width > b->left + b->width)
return 0;
if (a->top + a->height > b->top + b->height)
return 0;
return 1;
}
static int fimc_lite_g_selection(struct file *file, void *fh,
struct v4l2_selection *sel)
{
struct fimc_lite *fimc = video_drvdata(file);
struct flite_frame *f = &fimc->out_frame;
if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
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 = f->f_width;
sel->r.height = f->f_height;
return 0;
case V4L2_SEL_TGT_COMPOSE:
sel->r = f->rect;
return 0;
}
return -EINVAL;
}
static int fimc_lite_s_selection(struct file *file, void *fh,
struct v4l2_selection *sel)
{
struct fimc_lite *fimc = video_drvdata(file);
struct flite_frame *f = &fimc->out_frame;
struct v4l2_rect rect = sel->r;
unsigned long flags;
if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
sel->target != V4L2_SEL_TGT_COMPOSE)
return -EINVAL;
fimc_lite_try_compose(fimc, &rect);
if ((sel->flags & V4L2_SEL_FLAG_LE) &&
!enclosed_rectangle(&rect, &sel->r))
return -ERANGE;
if ((sel->flags & V4L2_SEL_FLAG_GE) &&
!enclosed_rectangle(&sel->r, &rect))
return -ERANGE;
sel->r = rect;
spin_lock_irqsave(&fimc->slock, flags);
f->rect = rect;
set_bit(ST_FLITE_CONFIG, &fimc->state);
spin_unlock_irqrestore(&fimc->slock, flags);
return 0;
}
static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
.vidioc_querycap = fimc_vidioc_querycap_capture,
.vidioc_enum_fmt_vid_cap_mplane = fimc_lite_enum_fmt_mplane,
.vidioc_try_fmt_vid_cap_mplane = fimc_lite_try_fmt_mplane,
.vidioc_s_fmt_vid_cap_mplane = fimc_lite_s_fmt_mplane,
.vidioc_g_fmt_vid_cap_mplane = fimc_lite_g_fmt_mplane,
.vidioc_g_selection = fimc_lite_g_selection,
.vidioc_s_selection = fimc_lite_s_selection,
.vidioc_reqbufs = fimc_lite_reqbufs,
.vidioc_querybuf = fimc_lite_querybuf,
.vidioc_prepare_buf = fimc_lite_prepare_buf,
.vidioc_create_bufs = fimc_lite_create_bufs,
.vidioc_qbuf = fimc_lite_qbuf,
.vidioc_dqbuf = fimc_lite_dqbuf,
.vidioc_streamon = fimc_lite_streamon,
.vidioc_streamoff = fimc_lite_streamoff,
};
/* Called with the media graph mutex held */
static struct v4l2_subdev *__find_remote_sensor(struct media_entity *me)
{
struct media_pad *pad = &me->pads[0];
struct v4l2_subdev *sd;
while (pad->flags & MEDIA_PAD_FL_SINK) {
/* source pad */
pad = media_entity_remote_source(pad);
if (pad == NULL ||
media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
break;
sd = media_entity_to_v4l2_subdev(pad->entity);
if (sd->grp_id == GRP_ID_FIMC_IS_SENSOR)
return sd;
/* sink pad */
pad = &sd->entity.pads[0];
}
return NULL;
}