// SPDX-License-Identifier: GPL-2.0-only
/*
* cobalt V4L2 API
*
* Derived from ivtv-ioctl.c and cx18-fileops.c
*
* Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates.
* All rights reserved.
*/
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/math64.h>
#include <linux/pci.h>
#include <linux/v4l2-dv-timings.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <media/v4l2-dv-timings.h>
#include <media/i2c/adv7604.h>
#include <media/i2c/adv7842.h>
#include "cobalt-alsa.h"
#include "cobalt-cpld.h"
#include "cobalt-driver.h"
#include "cobalt-v4l2.h"
#include "cobalt-irq.h"
#include "cobalt-omnitek.h"
static const struct v4l2_dv_timings cea1080p60 = V4L2_DV_BT_CEA_1920X1080P60;
/* vb2 DMA streaming ops */
static int cobalt_queue_setup(struct vb2_queue *q,
unsigned int *num_buffers, unsigned int *num_planes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct cobalt_stream *s = q->drv_priv;
unsigned size = s->stride * s->height;
if (*num_buffers < 3)
*num_buffers = 3;
if (*num_buffers > NR_BUFS)
*num_buffers = NR_BUFS;
if (*num_planes)
return sizes[0] < size ? -EINVAL : 0;
*num_planes = 1;
sizes[0] = size;
return 0;
}
static int cobalt_buf_init(struct vb2_buffer *vb)
{
struct cobalt_stream *s = vb->vb2_queue->drv_priv;
struct cobalt *cobalt = s->cobalt;
const size_t max_pages_per_line =
(COBALT_MAX_WIDTH * COBALT_MAX_BPP) / PAGE_SIZE + 2;
const size_t bytes =
COBALT_MAX_HEIGHT * max_pages_per_line * 0x20;
const size_t audio_bytes = ((1920 * 4) / PAGE_SIZE + 1) * 0x20;
struct sg_dma_desc_info *desc = &s->dma_desc_info[vb->index];
struct sg_table *sg_desc = vb2_dma_sg_plane_desc(vb, 0);
unsigned size;
int ret;
size = s->stride * s->height;
if (vb2_plane_size(vb, 0) < size) {
cobalt_info("data will not fit into plane (%lu < %u)\n",
vb2_plane_size(vb, 0), size);
return -EINVAL;
}
if (desc->virt == NULL) {
desc->dev = &cobalt->pci_dev->dev;
descriptor_list_allocate(desc,
s->is_audio ? audio_bytes : bytes);
if (desc->virt == NULL)
return -ENOMEM;
}
ret = descriptor_list_create(cobalt, sg_desc->sgl,
!s->is_output, sg_desc->nents, size,
s->width * s->bpp, s->stride, desc);
if (ret)
descriptor_list_free(desc);
return ret;
}
static void cobalt_buf_cleanup(struct vb2_buffer *vb)
{
struct cobalt_stream *s = vb->vb2_queue->drv_priv;
struct sg_dma_desc_info *desc = &s->dma_desc_info[vb->index];
descriptor_list_free(desc);
}
static int cobalt_buf_prepare(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct cobalt_stream *s = vb->vb2_queue->drv_priv;
vb2_set_plane_payload(vb, 0, s->stride * s->height);
vbuf->field = V4L2_FIELD_NONE;
return 0;
}
static void chain_all_buffers(struct cobalt_stream *s)
{
struct sg_dma_desc_info *desc[NR_BUFS];
struct cobalt_buffer *cb;
int i = 0;
list_for_each_entry(cb, &s->bufs, list) {
desc[i] = &s->dma_desc_info[cb->vb.vb2_buf.index];
if (i > 0)
descriptor_list_chain(desc[i-1], desc[i]);
i++;
}
}
static void cobalt_buf_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct vb2_queue *q = vb->vb2_queue;
struct cobalt_stream *s = q->drv_priv;
struct cobalt_buffer *cb = to_cobalt_buffer(vbuf);
struct sg_dma_desc_info *desc = &s->dma_desc_info[vb->index];
unsigned long flags;
/* Prepare new buffer */
descriptor_list_loopback(desc);
descriptor_list_interrupt_disable(desc);
spin_lock_irqsave(&s->irqlock, flags);
list_add_tail(&cb->list, &s->bufs);
chain_all_buffers(s);
spin_unlock_irqrestore(&s->irqlock, flags);
}
static void cobalt_enable_output(struct cobalt_stream *s)
{
struct cobalt *cobalt = s->cobalt;
struct v4l2_bt_timings *bt = &s->timings.bt;
struct m00514_syncgen_flow_evcnt_regmap __iomem *vo =
COBALT_TX_BASE(cobalt);
unsigned fmt = s->pixfmt != V4L2_PIX_FMT_BGR32 ?
M00514_CONTROL_BITMAP_FORMAT_16_BPP_MSK : 0;
struct v4l2_subdev_format sd_fmt = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
u64 clk = bt->pixelclock;
if (bt->flags & V4L2_DV_FL_REDUCED_FPS)
clk = div_u64(clk * 1000ULL, 1001);
if (!cobalt_cpld_set_freq(cobalt, clk)) {
cobalt_err("pixelclock out of range\n");
return;
}
sd_fmt.format.colorspace = s->colorspace;
sd_fmt.format.xfer_func = s->xfer_func;
sd_fmt.format.ycbcr_enc = s->ycbcr_enc;
sd_fmt.format.quantization = s->quantization;
sd_fmt.format.width = bt->width;
sd_fmt.format.height = bt->height;
/* Set up FDMA packer */
switch (s->pixfmt) {
case V4L2_PIX_FMT_YUYV:
sd_fmt.format.code = MEDIA_BUS_FMT_UYVY8_1X16;
break;
case V4L2_PIX_FMT_BGR32:
sd_fmt.format.code = MEDIA_BUS_FMT_RGB888_1X24;
break;
}
v4l2_subdev_call(s->sd, pad, set_fmt, NULL, &sd_fmt);
iowrite32(0, &vo->control);
/* 1080p60 */
iowrite32(bt->hsync, &vo->sync_generator_h_sync_length);
iowrite32(bt->hbackporch, &vo->sync_generator_h_backporch_length);
iowrite32(bt->width, &vo->sync_generator_h_active_length);
iowrite32(bt->hfrontporch, &vo->sync_generator_h_frontporch_length);
iowrite32(bt->vsync, &vo->sync_generator_v_sync_length);
iowrite32(bt->vbackporch, &vo->sync_generator_v_backporch_length);
iowrite32(bt->height, &vo->sync_generator_v_active_length);
iowrite32(bt->vfrontporch, &vo->sync_generator_v_frontporch_length);
iowrite32(0x9900c1, &vo->error_color);
iowrite32(M00514_CONTROL_BITMAP_SYNC_GENERATOR_LOAD_PARAM_MSK | fmt,
&vo->control);
iowrite32(M00514_CONTROL_BITMAP_EVCNT_CLEAR_MSK | fmt, &vo->control);
iowrite32(M00514_CONTROL_BITMAP_SYNC_GENERATOR_ENABLE_MSK |
M00514_CONTROL_BITMAP_FLOW_CTRL_OUTPUT_ENABLE_MSK |
fmt, &vo->control);
}
static void cobalt_enable_input(struct cobalt_stream *s)
{
struct cobalt *cobalt = s->cobalt;
int ch = (int)s->video_channel;
struct m00235_fdma_packer_regmap __iomem *packer;
struct v4l2_subdev_format sd_fmt_yuyv = {
.pad = s->pad_source,
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
.format.code = MEDIA_BUS_FMT_YUYV8_1X16,
};
struct v4l2_subdev_format sd_fmt_rgb = {
.pad = s->pad_source,
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
.format.code = MEDIA_BUS_FMT_RGB888_1X24,
};
cobalt_dbg(1, "video_channel %d (%s, %s)\n",
s->video_channel,
s->input == 0 ? "hdmi" : "generator",
"YUYV");
packer = COBALT_CVI_PACKER(cobalt, ch);
/* Set up FDMA packer */
switch (s->pixfmt) {
case V4L2_PIX_FMT_YUYV:
iowrite32(M00235_CONTROL_BITMAP_ENABLE_MSK |
(1 << M00235_CONTROL_BITMAP_PACK_FORMAT_OFST),
&packer->control);
v4l2_subdev_call(s->sd, pad, set_fmt, NULL,
&sd_fmt_yuyv);
break;
case V4L2_PIX_FMT_RGB24:
iowrite32(M00235_CONTROL_BITMAP_ENABLE_MSK |
(2 << M00235_CONTROL_BITMAP_PACK_FORMAT_OFST),
&packer->control);
v4l2_subdev_call(s->sd, pad, set_fmt, NULL,
&sd_fmt_rgb);
break;
case V4L2_PIX_FMT_BGR32:
iowrite32(M00235_CONTROL_BITMAP_ENABLE_MSK |
M00235_CONTROL_BITMAP_ENDIAN_FORMAT_MSK |
(3 << M00235_CONTROL_BITMAP_PACK_FORMAT_OFST),
&packer->control);
v4l2_subdev_call(s->sd, pad, set_fmt, NULL,
&sd_fmt_rgb);
break;
}
}
static void cobalt_dma_start_streaming(struct cobalt_stream *s)
{
struct cobalt *cobalt = s->cobalt;
int rx = s->video_channel;
struct m00460_evcnt_regmap __iomem *evcnt =
COBALT_CVI_EVCNT(cobalt, rx);
struct cobalt_buffer *cb;
unsigned long flags;
spin_lock_irqsave(&s->irqlock, flags);
if (!s->is_output) {
iowrite32(M00460_CONTROL_BITMAP_CLEAR_MSK, &evcnt->control);
iowrite32(M00460_CONTROL_BITMAP_ENABLE_MSK, &evcnt->control);
} else {
struct m00514_syncgen_flow_evcnt_regmap __iomem *vo =
COBALT_TX_BASE(cobalt);
u32 ctrl = ioread32(&vo->control);
ctrl &= ~(M00514_CONTROL_BITMAP_EVCNT_ENABLE_MSK |
M00514_CONTROL_BITMAP_EVCNT_CLEAR_MSK);
iowrite32(ctrl | M00514_CONTROL_BITMAP_EVCNT_CLEAR_MSK,
&vo->control);
iowrite32(ctrl | M00514_CONTROL_BITMAP_EVCNT_ENABLE_MSK,
&vo->control);
}
cb = list_first_entry(&s->bufs, struct cobalt_buffer, list);
omni_sg_dma_start(s, &s->dma_desc_info[cb->vb.vb2_buf.index]);
spin_unlock_irqrestore(&s->irqlock, flags);
}
static int cobalt_start_streaming(struct vb2_queue *q, unsigned int count)
{
struct cobalt_stream *s = q->drv_priv;
struct cobalt *cobalt = s->cobalt;
struct m00233_video_measure_regmap __iomem *vmr;
struct m00473_freewheel_regmap __iomem *fw;
struct m00479_clk_loss_detector_regmap __iomem *clkloss;
int rx = s->video_channel;
struct m00389_cvi_regmap __iomem *cvi = COBALT_CVI(cobalt, rx);
struct m00460_evcnt_regmap __iomem *evcnt = COBALT_CVI_EVCNT(cobalt, rx);
struct v4l2_bt_timings *bt = &s->timings.bt;
u64 tot_size;
u32 clk_freq;
if (s->is_audio)
goto done;
if (s->is_output) {
s->unstable_frame = false;
cobalt_enable_output(s);
goto done;
}
cobalt_enable_input(s);
fw = COBALT_CVI_FREEWHEEL(cobalt, rx);
vmr = COBALT_CVI_VMR(cobalt, rx);
clkloss = COBALT_CVI_CLK_LOSS(cobalt, rx);
iowrite32(M00460_CONTROL_BITMAP_CLEAR_MSK, &evcnt->control);
iowrite32(M00460_CONTROL_BITMAP_ENABLE_MSK, &evcnt->control);
iowrite32(bt->width, &cvi->frame_width);
iowrite32(bt->height, &cvi->frame_height);
tot_size = V4L2_DV_BT_FRAME_WIDTH(bt) * V4L2_DV_BT_FRAME_HEIGHT(bt);
iowrite32(div_u64((u64)V4L2_DV_BT_FRAME_WIDTH(bt) * COBALT_CLK * 4,
bt->pixelclock), &vmr->hsync_timeout_val);
iowrite32(M00233_CONTROL_BITMAP_ENABLE_MEASURE_MSK, &vmr->control);
clk_freq = ioread32(&fw->clk_freq);
iowrite32(clk_freq / 1000000, &clkloss->ref_clk_cnt_val);
/* The lower bound for the clock frequency is 0.5% lower as is
* allowed by the spec */
iowrite32(div_u64(bt->pixelclock * 995, 1000000000),
&clkloss->test_clk_cnt_val);
/* will be enabled after the first frame has been received */
iowrite32(bt->width * bt->height, &fw->active_length);
iowrite32(div_u64((u64)clk_freq * tot_size, bt->pixelclock),
&fw->total_length);
iowrite32(M00233_IRQ_TRIGGERS_BITMAP_VACTIVE_AREA_MSK |
M00233_IRQ_TRIGGERS_BITMAP_HACTIVE_AREA_MSK,
&vmr->irq_triggers);
iowrite32(0, &cvi->control);
iowrite32(M00233_CONTROL_BITMAP_ENABLE_MEASURE_MSK, &vmr->control);
iowrite32(0xff, &fw->output_color);
iowrite32(M00479_CTRL_BITMAP_ENABLE_MSK, &clkloss->ctrl);
iowrite32(M00473_CTRL_BITMAP_ENABLE_MSK |
M00473_CTRL_BITMAP_FORCE_FREEWHEEL_MODE_MSK, &fw->ctrl);
s->unstable_frame = true;
s->enable_freewheel = false;
s->enable_cvi = false;
s->skip_first_frames = 0;
done:
s->sequence = 0;
cobalt_dma_start_streaming(s);
return 0;
}
static void cobalt_dma_stop_streaming(struct cobalt_stream *s)
{
struct cobalt *cobalt = s->cobalt;
struct sg_dma_desc_info *desc;
struct cobalt_buffer *cb;
unsigned long flags;
int timeout_msec = 100;
int rx = s->video_channel;
struct m00460_evcnt_regmap __iomem *evcnt =
COBALT_CVI_EVCNT(cobalt, rx);
if (!s->is_output) {
iowrite32(0, &evcnt->control);
} else if (!s->is_audio) {
struct m00514_syncgen_flow_evcnt_regmap __iomem *vo =
COBALT_TX_BASE(cobalt);
iowrite32(M00514_CONTROL_BITMAP_EVCNT_CLEAR_MSK, &vo->control);
iowrite32(0, &vo->control);
}
/* Try to stop the DMA engine gracefully */
spin_lock_irqsave(&s->irqlock, flags);
list_for_each_entry(cb, &s->bufs, list) {
desc = &s->dma_desc_info[cb->vb.vb2_buf.index];
/* Stop DMA after this descriptor chain */
descriptor_list_end_of_chain(desc);
}
spin_unlock_irqrestore(&s->irqlock, flags);
/* Wait 100 millisecond for DMA to finish, abort on timeout. */
if (!wait_event_timeout(s->q.done_wq, is_dma_done(s),
msecs_to_jiffies(timeout_msec))) {
omni_sg_dma_abort_channel(s);
pr_warn("aborted\n");
}
cobalt_write_bar0(cobalt, DMA_INTERRUPT_STATUS_REG,
1 << s->dma_channel);
}
static void cobalt_stop_streaming(struct vb2_queue *q)
{
struct cobalt_stream *s = q->drv_priv;
struct cobalt *cobalt = s->cobalt;
int rx = s->video_channel;
struct m00233_video_measure_regmap __iomem *vmr;
struct m00473_freewheel_regmap __iomem *fw;
struct m00479_clk_loss_detector_regmap __iomem *clkloss;
struct cobalt_buffer *cb;
struct list_head *p, *safe;
unsigned long flags;
cobalt_dma_stop_streaming(s);
/* Return all buffers to user space */
spin_lock_irqsave(&s->irqlock, flags);
list_for_each_safe(p, safe, &s->bufs) {
cb = list_entry(p, struct cobalt_buffer, list);
list_del(&cb->list);
vb2_buffer_done(&cb->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
spin_unlock_irqrestore(&s->irqlock, flags);
if (s->is_audio || s->is_output)
return;
fw = COBALT_CVI_FREEWHEEL(cobalt, rx);
vmr = COBALT_CVI_VMR(cobalt, rx);
clkloss = COBALT_CVI_CLK_LOSS(cobalt, rx);
iowrite32(0, &vmr->control);
iowrite32(M00233_CONTROL_BITMAP_ENABLE_MEASURE_MSK, &vmr->control);
iowrite32(0, &fw->ctrl);
iowrite32(0, &clkloss->ctrl);
}
static const struct vb2_ops cobalt_qops = {
.queue_setup = cobalt_queue_setup,
.buf_init = cobalt_buf_init,
.buf_cleanup = cobalt_buf_cleanup,
.buf_prepare = cobalt_buf_prepare,
.buf_queue = cobalt_buf_queue,
.start_streaming = cobalt_start_streaming,
.stop_streaming = cobalt_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
/* V4L2 ioctls */
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int cobalt_cobaltc(struct cobalt *cobalt, unsigned int cmd, void *arg)
{
struct v4l2_dbg_register *regs = arg;
void __iomem *adrs = cobalt->bar1 + regs->reg;
cobalt_info("cobalt_cobaltc: adrs = %p\n", adrs);
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
regs->size = 4;
if (cmd == VIDIOC_DBG_S_REGISTER)
iowrite32(regs->val, adrs);
else
regs->val = ioread32(adrs);
return 0;
}
static int cobalt_g_register(struct file *file, void *priv_fh,
struct v4l2_dbg_register *reg)
{
struct cobalt_stream *s = video_drvdata(file);
struct cobalt *cobalt = s->cobalt;
return cobalt_cobaltc(cobalt, VIDIOC_DBG_G_REGISTER, reg);
}
static int cobalt_s_register(struct file *file, void *priv_fh,
const struct v4l2_dbg_register *reg)
{
struct cobalt_stream *s = video_drvdata(file);
struct cobalt *cobalt = s->cobalt;
return cobalt_cobaltc(cobalt, VIDIOC_DBG_S_REGISTER,
(struct v4l2_dbg_register *)reg);
}
#endif
static int cobalt_querycap(struct file *file, void *priv_fh,
struct v4l2_capability *vcap)
{
struct cobalt_stream *s = video_drvdata(file);
struct cobalt *cobalt = s->cobalt;
strscpy(vcap->driver, "cobalt", sizeof(vcap->driver));
strscpy(vcap->card, "cobalt", sizeof(vcap->card));
snprintf(vcap->bus_info, sizeof(vcap->bus_info),
"PCIe:%s", pci_name(cobalt->pci_dev));
vcap->capabilities = V4L2_CAP_STREAMING | V4L2_CAP_READWRITE |
V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_DEVICE_CAPS;
if (cobalt->have_hsma_tx)
vcap->capabilities |= V4L2_CAP_VIDEO_OUTPUT;
return 0;
}
static void cobalt_video_input_status_show(struct cobalt_stream *s)
{
struct m00389_cvi_regmap __iomem *cvi;
struct m00233_video_measure_regmap __iomem *vmr;
struct m00473_freewheel_regmap __iomem *fw;
struct m00479_clk_loss_detector_regmap __iomem *clkloss;
struct m00235_fdma_packer_regmap __iomem *packer;
int rx = s->video_channel;
struct cobalt *cobalt = s->cobalt;
u32 cvi_ctrl, cvi_stat;
u32 vmr_ctrl, vmr_stat;
cvi = COBALT_CVI(cobalt, rx);
vmr = COBALT_CVI_VMR(cobalt, rx);
fw = COBALT_CVI_FREEWHEEL(cobalt, rx);
clkloss = COBALT_CVI_CLK_LOSS(cobalt, rx);
packer = COBALT_CVI_PACKER(cobalt, rx);
cvi_ctrl = ioread32(&cvi->control);
cvi_stat = ioread32(&cvi->status);
vmr_ctrl = ioread32(&vmr->control);
vmr_stat = ioread32(&vmr->status);
cobalt_info("rx%d: cvi resolution: %dx%d\n", rx,
ioread32(&cvi->frame_width), ioread32(&cvi->frame_height));
cobalt_info("rx%d: cvi control: %s%s%s\n", rx,
(cvi_ctrl & M00389_CONTROL_BITMAP_ENABLE_MSK) ?
"enable " : "disable ",
(cvi_ctrl & M00389_CONTROL_BITMAP_HSYNC_POLARITY_LOW_MSK) ?
"HSync- " : "HSync+ ",
(cvi_ctrl & M00389_CONTROL_BITMAP_VSYNC_POLARITY_LOW_MSK) ?
"VSync- " : "VSync+ ");
cobalt_info("rx%d: cvi status: %s%s\n", rx,
(cvi_stat & M00389_STATUS_BITMAP_LOCK_MSK) ?
"lock " : "no-lock ",
(cvi_stat & M00389_STATUS_BITMAP_ERROR_MSK) ?
"error " : "no-error ");
cobalt_info("rx%d: Measurements: %s%s%s%s%s%s%s\n", rx,
(vmr_ctrl & M00233_CONTROL_BITMAP_HSYNC_POLARITY_LOW_MSK) ?
"HSync- " : "HSync+ ",
(vmr_ctrl & M00233_CONTROL_BITMAP_VSYNC_POLARITY_LOW_MSK) ?
"VSync- " : "VSync+ ",
(vmr_ctrl & M00233_CONTROL_BITMAP_ENABLE_MEASURE_MSK) ?
"enabled " : "disabled ",
(vmr_ctrl & M00233_CONTROL_BITMAP_ENABLE_INTERRUPT_MSK) ?
"irq-enabled " : "irq-disabled ",
(vmr_ctrl & M00233_CONTROL_BITMAP_UPDATE_ON_HSYNC_MSK) ?
"update-on-hsync " : "",
(vmr_stat & M00233_STATUS_BITMAP_HSYNC_TIMEOUT_MSK) ?
"hsync-timeout " : "",
(vmr_stat & M00233_STATUS_BITMAP_INIT_DONE_MSK) ?
"init-done" : "");
cobalt_info("rx%d: irq_status: 0x%02x irq_triggers: 0x%02x\n", rx,
ioread32(&vmr->irq_status) & 0xff,
ioread32(&vmr->irq_triggers) & 0xff);
cobalt_info("rx%d: vsync: %d\n", rx, ioread32(&vmr->vsync_time));
cobalt_info("rx%d: vbp: %d\n", rx, ioread32(&vmr->vback_porch));
cobalt_info("rx%d: vact: %d\n", rx, ioread32(&vmr->vactive_area));
cobalt_info("rx%d: vfb: %d\n", rx, ioread32(&vmr->vfront_porch));
cobalt_info("rx%d: hsync: %d\n", rx, ioread32(&vmr->hsync_time));
cobalt_info("rx%d: hbp: %d\n", rx, ioread32(&vmr->hback_porch));
cobalt_info("rx%d: hact: %d\n", rx, ioread32(&vmr->hactive_area));
cobalt_info("rx%d: hfb: %d\n", rx, ioread32(&vmr->hfront_porch));
cobalt_info("rx%d: Freewheeling: %s%s%s\n", rx,
(ioread32(&fw->ctrl) & M00473_CTRL_BITMAP_ENABLE_MSK) ?
"enabled " : "disabled ",
(ioread32(&fw->ctrl) & M00473_CTRL_BITMAP_FORCE_FREEWHEEL_MODE_MSK) ?
"forced " : "",
(ioread32(&fw->status) & M00473_STATUS_BITMAP_FREEWHEEL_MODE_MSK) ?
"freewheeling " : "video-passthrough ");
iowrite32(0xff, &vmr->irq_status);
cobalt_info("rx%d: Clock Loss Detection: %s%s\n", rx,
(ioread32(&clkloss->ctrl) & M00479_CTRL_BITMAP_ENABLE_MSK) ?
"enabled " : "disabled ",
(ioread32(&clkloss->status) & M00479_STATUS_BITMAP_CLOCK_MISSING_MSK) ?
"clock-missing " : "found-clock ");
cobalt_info("rx%d: Packer: %x\n", rx, ioread32(&packer->control));
}
static int cobalt_log_status(struct file *file, void *priv_fh)
{
struct cobalt_stream *s = video_drvdata(file);
struct cobalt *cobalt = s->cobalt;
struct m00514_syncgen_flow_evcnt_regmap __iomem *vo =
COBALT_TX_BASE(cobalt);
u8 stat;
cobalt_info("%s", cobalt->hdl_info);
cobalt_info("sysctrl: %08x, sysstat: %08x\n",
cobalt_g_sysctrl(cobalt),
cobalt_g_sysstat(cobalt));
cobalt_info("dma channel: %d, video channel: %d\n",
s->dma_channel, s->video_channel);
cobalt_pcie_status_show(cobalt);
cobalt_cpld_status(cobalt);
cobalt_irq_log_status(cobalt);
v4l2_subdev_call(s->sd, core, log_status);
if (!s->is_output) {
cobalt_video_input_status_show(s);
return 0;
}
stat = ioread32(&vo->rd_status);
cobalt_info("tx: status: %s%s\n",
(stat & M00514_RD_STATUS_BITMAP_FLOW_CTRL_NO_DATA_ERROR_MSK) ?
"no_data " : "",
(stat & M00514_RD_STATUS_BITMAP_READY_BUFFER_FULL_MSK) ?
"ready_buffer_full " : "");
cobalt_info("tx: evcnt: %d\n", ioread32(&vo->rd_evcnt_count));
return 0;
}
static int cobalt_enum_dv_timings(struct file *file, void *priv_fh,
struct v4l2_enum_dv_timings *timings)
{
struct cobalt_stream *s = video_drvdata(file);
if (s->input == 1) {
if (timings->index)
return -EINVAL;
memset(timings->reserved, 0, sizeof(timings->reserved));
timings->timings = cea1080p60;
return 0;
}
timings->pad = 0;
return v4l2_subdev_call(s->sd,
pad, enum_dv_timings, timings);
}
static int cobalt_s_dv_timings(struct file *file, void *priv_fh,
struct v4l2_dv_timings *timings)
{
struct cobalt_stream *s = video_drvdata(file);
int err;
if (s->input == 1) {
*timings = cea1080p60;
return 0;
}
if (v4l2_match_dv_timings(timings, &s->timings, 0, true))
return 0;
if (vb2_is_busy(&s->q))
return -EBUSY;
err = v4l2_subdev_call(s->sd,
pad, s_dv_timings, 0, timings);
if (!err) {
s->timings = *timings;
s->width = timings->bt.width;
s->height = timings->bt.height;
s->stride = timings->bt.width * s->bpp;
}
return err;
}
static int cobalt_g_dv_timings(struct file *file, void *priv_fh,
struct v4l2_dv_timings *timings)
{
struct cobalt_stream *s = video_drvdata(file);
if (s->input == 1) {
*timings = cea1080p60;
return 0;
}
return v4l2_subdev_call(s->sd,
pad, g_dv_timings, 0, timings);
}
static int cobalt_query_dv_timings(struct file *file, void *priv_fh,
struct v4l2_dv_timings *timings)
{
struct cobalt_stream *s = video_drvdata(file);
if (s->input == 1) {
*timings = cea1080p60;
return 0;
}
return v4l2_subdev_call(s->sd,
pad, query_dv_timings, 0, timings);
}
static int cobalt_dv_timings_cap(struct file *file, void *priv_fh,
struct v4l2_dv_timings_cap *cap)
{
struct cobalt_stream *s = video_drvdata(file);
cap->pad = 0;
return v4l2_subdev_call(s->sd,
pad, dv_timings_cap, cap);
}
static int cobalt_enum_fmt_vid_cap(struct file *file, void *priv_fh,
struct v4l2_fmtdesc *f)
{
switch (f->index) {
case 0:
f->pixelformat = V4L2_PIX_FMT_YUYV;
break;
case 1:
f->pixelformat = V4L2_PIX_FMT_RGB24;
break;
case 2:
f->pixelformat = V4L2_PIX_FMT_BGR32;
break;
default:
return -EINVAL;
}
return 0;
}
static int cobalt_g_fmt_vid_cap(struct file *file, void *priv_fh,
struct v4l2_format *f)
{
struct cobalt_stream *s = video_drvdata(file);
struct v4l2_pix_format *pix = &f->fmt.pix;
pix->width = s->width;
pix->height = s->height;
pix->bytesperline = s->stride;
pix->field = V4L2_FIELD_NONE;
if (s->input == 1) {
pix->colorspace = V4L2_COLORSPACE_SRGB;
} else {
struct v4l2_subdev_format sd_fmt = {
.pad = s->pad_source,
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
v4l2_subdev_call(s->sd, pad, get_fmt, NULL, &sd_fmt);
v4l2_fill_pix_format(pix, &sd_fmt.format);
}
pix->pixelformat = s->pixfmt;
pix->sizeimage = pix->bytesperline * pix->height;
return 0;
}
static int cobalt_try_fmt_vid_cap(struct file *file, void *priv_fh,
struct v4l2_format *f)
{
struct cobalt_stream *s = video_drvdata(file);
struct v4l2_pix_format *pix = &f->fmt.pix;
/* Check for min (QCIF) and max (Full HD) size */
if ((pix->width < 176) || (pix->height < 144)) {
pix->width = 176;
pix->height = 144;
}
if ((pix->width > 1920) || (pix->height > 1080)) {
pix->width = 1920;
pix->height = 1080;
}
/* Make width multiple of 4 */
pix->width &= ~0x3;
/* Make height multiple of 2 */
pix->height &= ~0x1;
if (s->input == 1) {
/* Generator => fixed format only */
pix->width = 1920;
pix->height = 1080;
pix->colorspace = V4L2_COLORSPACE_SRGB;
} else {
struct v4l2_subdev_format sd_fmt = {
.pad = s->pad_source,
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
v4l2_subdev_call(s->sd, pad, get_fmt, NULL, &sd_fmt);
v4l2_fill_pix_format(pix, &sd_fmt.format);
}
switch (pix->pixelformat) {
case V4L2_PIX_FMT_YUYV:
default:
pix->bytesperline = max(pix->bytesperline & ~0x3,
pix->width * COBALT_BYTES_PER_PIXEL_YUYV);
pix->pixelformat = V4L2_PIX_FMT_YUYV;
break;
case V4L2_PIX_FMT_RGB24:
pix->bytesperline = max(pix->bytesperline & ~0x3,
pix->width * COBALT_BYTES_PER_PIXEL_RGB24);
break;
case V4L2_PIX_FMT_BGR32:
pix->bytesperline = max(pix->bytesperline & ~0x3,
pix->width * COBALT_BYTES_PER_PIXEL_RGB32);
break;
}
pix->sizeimage = pix->bytesperline * pix->height;
pix->field = V4L2_FIELD_NONE;
return 0;
}
static int cobalt_s_fmt_vid_cap(struct file *file, void *priv_fh,
struct v4l2_format *f)
{
struct cobalt_stream *s = video_drvdata(file);
struct v4l2_pix_format *pix = &f->fmt.pix;
if (vb2_is_busy(&s->q))
return -EBUSY;
if (cobalt_try_fmt_vid_cap(file, priv_fh, f))
return -EINVAL;
s->width = pix->width;
s->height = pix->height;
s->stride = pix->bytesperline;
switch (pix->pixelformat) {
case V4L2_PIX_FMT_YUYV:
s->bpp = COBALT_BYTES_PER_PIXEL_YUYV;
break;
case V4L2_PIX_FMT_RGB24:
s->bpp = COBALT_BYTES_PER_PIXEL_RGB24;
break;
case V4L2_PIX_FMT_BGR32:
s->bpp = COBALT_BYTES_PER_PIXEL_RGB32;
break;
default:
return -EINVAL;
}
s->pixfmt = pix->pixelformat;
cobalt_enable_input(s);
return 0;
}
static int cobalt_try_fmt_vid_out(struct file *file, void *priv_fh,
struct v4l2_format *f)
{
struct v4l2_pix_format *pix = &f->fmt.pix;
/* Check for min (QCIF) and max (Full HD) size */
if ((pix->width < 176) || (pix->height < 144)) {
pix->width = 176;
pix->height = 144;
}
if ((pix->width > 1920) || (pix->height > 1080)) {
pix->width = 1920;
pix->height = 1080;
}
/* Make width multiple of 4 */
pix->width &= ~0x3;
/* Make height multiple of 2 */
pix->height &= ~0x1;
switch (pix->pixelformat) {
case V4L2_PIX_FMT_YUYV:
default:
pix->bytesperline = max(pix->bytesperline & ~0x3,
pix->width * COBALT_BYTES_PER_PIXEL_YUYV);
pix->pixelformat = V4L2_PIX_FMT_YUYV;
break;
case V4L2_PIX_FMT_BGR32:
pix->bytesperline = max(pix->bytesperline & ~0x3,
pix->width * COBALT_BYTES_PER_PIXEL_RGB32);
break;
}
pix->sizeimage = pix->bytesperline * pix->height;
pix->field = V4L2_FIELD_NONE;
return 0;
}
static int cobalt_g_fmt_vid_out(struct file *file, void *priv_fh,
struct v4l2_format *f)
{
struct cobalt_stream *s = video_drvdata(file);
struct v4l2_pix_format *pix = &f->fmt.pix;
pix->width = s->width;
pix->height = s->height;
pix->bytesperline = s->stride;
pix->field = V4L2_FIELD_NONE;
pix->pixelformat = s->pixfmt;
pix->colorspace = s->colorspace;
pix->xfer_func = s->xfer_func;
pix->ycbcr_enc = s->ycbcr_enc;
pix->quantization = s->quantization;
pix->sizeimage = pix->bytesperline * pix->height;
return 0;
}
static int cobalt_enum_fmt_vid_out(struct file *file, void *priv_fh,
struct v4l2_fmtdesc *f)
{
switch (f->index) {
case 0:
f->pixelformat = V4L2_PIX_FMT_YUYV;
break;
case 1:
f->pixelformat = V4L2_PIX_FMT_BGR32;
break;
default:
return -EINVAL;
}
return 0;
}
static int cobalt_s_fmt_vid_out(struct file *file, void *priv_fh,
struct v4l2_format *f)
{
struct cobalt_stream *s = video_drvdata(file);
struct v4l2_pix_format *pix = &f->fmt.pix;
struct v4l2_subdev_format sd_fmt = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
u32 code;
if (cobalt_try_fmt_vid_out(file, priv_fh, f))
return -EINVAL;
if (vb2_is_busy(&s->q) && (pix->pixelformat != s->pixfmt ||
pix->width != s->width || pix->height != s->height ||
pix->bytesperline != s->stride))
return -EBUSY;
switch (pix->pixelformat) {
case V4L2_PIX_FMT_YUYV:
s->bpp = COBALT_BYTES_PER_PIXEL_YUYV;
code = MEDIA_BUS_FMT_UYVY8_1X16;
break;
case V4L2_PIX_FMT_BGR32:
s->bpp = COBALT_BYTES_PER_PIXEL_RGB32;
code = MEDIA_BUS_FMT_RGB888_1X24;
break;
default:
return -EINVAL;
}
s->width = pix->width;
s->height = pix->height;
s->stride = pix->bytesperline;
s->pixfmt = pix->pixelformat;
s->colorspace = pix->colorspace;
s->xfer_func = pix->xfer_func;
s->ycbcr_enc = pix->ycbcr_enc;
s->quantization = pix->quantization;
v4l2_fill_mbus_format(&sd_fmt.format, pix, code);
v4l2_subdev_call(s->sd, pad, set_fmt, NULL, &sd_fmt);
return 0;
}
static int cobalt_enum_input(struct file *file, void *priv_fh,
struct v4l2_input *inp)
{
struct cobalt_stream *s = video_drvdata(file);
if (inp->index > 1)
return -EINVAL;
if (inp->index == 0)
snprintf(inp->name, sizeof(inp->name),
"HDMI-%d", s->video_channel);
else
snprintf(inp->name, sizeof(inp->name),
"Generator-%d", s->video_channel);
inp->type = V4L2_INPUT_TYPE_CAMERA;
inp->capabilities = V4L2_IN_CAP_DV_TIMINGS;
if (inp->index == 1)
return 0;
return v4l2_subdev_call(s->sd,
video, g_input_status, &inp->status);
}
static int cobalt_g_input(struct file *file, void *priv_fh, unsigned int *i)
{
struct cobalt_stream *s = video_drvdata(file);
*i = s->input;
return 0;
}
static int cobalt_s_input(struct file *file, void *priv_fh, unsigned int i)
{
struct cobalt_stream *s = video_drvdata(file);
if (i >= 2)
return -EINVAL;
if (vb2_is_busy(&s->q))
return -EBUSY;
s->input = i;
cobalt_enable_input(s);
if (s->input == 1) /* Test Pattern Generator */
return 0;
return v4l2_subdev_call(s->sd, video, s_routing,
ADV76XX_PAD_HDMI_PORT_A, 0, 0);
}
static int cobalt_enum_output(struct file *file, void *priv_fh,
struct v4l2_output *out)
{
if (out->index)
return -EINVAL;
snprintf(out->name, sizeof(out->name), "HDMI-%d", out->index);
out->type = V4L2_OUTPUT_TYPE_ANALOG;
out->capabilities = V4L2_OUT_CAP_DV_TIMINGS;
return 0;
}
static int cobalt_g_output(struct file *file, void *priv_fh, unsigned int *i)
{
*i = 0;
return 0;
}
static int cobalt_s_output(struct file *file, void *priv_fh, unsigned int i)
{
return i ? -EINVAL : 0;
}
static int cobalt_g_edid(struct file *file, void *fh, struct v4l2_edid *edid)
{
struct cobalt_stream *s = video_drvdata(file);
u32 pad = edid->pad;
int ret;
if (edid->pad >= (s->is_output ? 1 : 2))
return -EINVAL;
edid->pad = 0;
ret = v4l2_subdev_call(s->sd, pad, get_edid, edid);
edid->pad = pad;
return ret;
}
static int cobalt_s_edid(struct file *file, void *fh, struct v4l2_edid *edid)
{
struct cobalt_stream *s = video_drvdata(file);
u32 pad = edid->pad;
int ret;
if (edid->pad >= 2)
return -EINVAL;
edid->pad = 0;
ret = v4l2_subdev_call(s->sd, pad, set_edid, edid);
edid->pad = pad;
return ret;
}
static int cobalt_subscribe_event(struct v4l2_fh *fh,
const struct v4l2_event_subscription *sub)
{
switch (sub->type) {
case V4L2_EVENT_SOURCE_CHANGE:
return v4l2_event_subscribe(fh, sub, 4, NULL);
}
return v4l2_ctrl_subscribe_event(fh, sub);
}
static int cobalt_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
{
struct cobalt_stream *s = video_drvdata(file);
struct v4l2_fract fps;
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
fps = v4l2_calc_timeperframe(&s->timings);
a->parm.capture.timeperframe.numerator = fps.numerator;
a->parm.capture.timeperframe.denominator = fps.denominator;
a->parm.capture.readbuffers = 3;
return 0;
}
static int cobalt_g_pixelaspect(struct file *file, void *fh,
int type, struct v4l2_fract *f)
{
struct cobalt_stream *s = video_drvdata(file);
struct v4l2_dv_timings timings;
int err = 0;
if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (s->input == 1)
timings = cea1080p60;
else
err = v4l2_subdev_call(s->sd, pad, g_dv_timings, 0, &timings);
if (!err)
*f = v4l2_dv_timings_aspect_ratio(&timings);
return err;
}
static int cobalt_g_selection(struct file *file, void *fh,
struct v4l2_selection *sel)
{
struct cobalt_stream *s = video_drvdata(file);
struct v4l2_dv_timings timings;
int err = 0;
if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (s->input == 1)
timings = cea1080p60;
else
err = v4l2_subdev_call(s->sd, pad, g_dv_timings, 0, &timings);
if (err)
return err;
switch (sel->target) {
case V4L2_SEL_TGT_CROP_BOUNDS:
case V4L2_SEL_TGT_CROP_DEFAULT:
sel->r.top = 0;
sel->r.left = 0;
sel->r.width = timings.bt.width;
sel->r.height = timings.bt.height;
break;
default:
return -EINVAL;
}
return 0;
}
static const struct v4l2_ioctl_ops cobalt_ioctl_ops = {
.vidioc_querycap = cobalt_querycap,
.vidioc_g_parm = cobalt_g_parm,
.vidioc_log_status = cobalt_log_status,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_g_pixelaspect = cobalt_g_pixelaspect,
.vidioc_g_selection = cobalt_g_selection,
.vidioc_enum_input = cobalt_enum_input,
.vidioc_g_input = cobalt_g_input,
.vidioc_s_input = cobalt_s_input,
.vidioc_enum_fmt_vid_cap = cobalt_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = cobalt_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = cobalt_s_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = cobalt_try_fmt_vid_cap,
.vidioc_enum_output = cobalt_enum_output,
.vidioc_g_output = cobalt_g_output,
.vidioc_s_output = cobalt_s_output,
.vidioc_enum_fmt_vid_out = cobalt_enum_fmt_vid_out,
.vidioc_g_fmt_vid_out = cobalt_g_fmt_vid_out,
.vidioc_s_fmt_vid_out = cobalt_s_fmt_vid_out,
.vidioc_try_fmt_vid_out = cobalt_try_fmt_vid_out,
.vidioc_s_dv_timings = cobalt_s_dv_timings,
.vidioc_g_dv_timings = cobalt_g_dv_timings,
.vidioc_query_dv_timings = cobalt_query_dv_timings,
.vidioc_enum_dv_timings = cobalt_enum_dv_timings,
.vidioc_dv_timings_cap = cobalt_dv_timings_cap,
.vidioc_g_edid = cobalt_g_edid,
.vidioc_s_edid = cobalt_s_edid,
.vidioc_subscribe_event = cobalt_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_register = cobalt_g_register,
.vidioc_s_register = cobalt_s_register,
#endif
};
static const struct v4l2_ioctl_ops cobalt_ioctl_empty_ops = {
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_register = cobalt_g_register,
.vidioc_s_register = cobalt_s_register,
#endif
};
/* Register device nodes */
static const struct v4l2_file_operations cobalt_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.unlocked_ioctl = video_ioctl2,
.release = vb2_fop_release,
.poll = vb2_fop_poll,
.mmap = vb2_fop_mmap,
.read = vb2_fop_read,
};
static const struct v4l2_file_operations cobalt_out_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.unlocked_ioctl = video_ioctl2,
.release = vb2_fop_release,
.poll = vb2_fop_poll,
.mmap = vb2_fop_mmap,
.write = vb2_fop_write,
};
static const struct v4l2_file_operations cobalt_empty_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.unlocked_ioctl = video_ioctl2,
.release = v4l2_fh_release,
};
static int cobalt_node_register(struct cobalt *cobalt, int node)
{
static const struct v4l2_dv_timings dv1080p60 =
V4L2_DV_BT_CEA_1920X1080P60;
struct cobalt_stream *s = cobalt->streams + node;
struct video_device *vdev = &s->vdev;
struct vb2_queue *q = &s->q;
int ret;
mutex_init(&s->lock);
spin_lock_init(&s->irqlock);
snprintf(vdev->name, sizeof(vdev->name),
"%s-%d", cobalt->v4l2_dev.name, node);
s->width = 1920;
/* Audio frames are just 4 lines of 1920 bytes */
s->height = s->is_audio ? 4 : 1080;
if (s->is_audio) {
s->bpp = 1;
s->pixfmt = V4L2_PIX_FMT_GREY;
} else if (s->is_output) {
s->bpp = COBALT_BYTES_PER_PIXEL_RGB32;
s->pixfmt = V4L2_PIX_FMT_BGR32;
} else {
s->bpp = COBALT_BYTES_PER_PIXEL_YUYV;
s->pixfmt = V4L2_PIX_FMT_YUYV;
}
s->colorspace = V4L2_COLORSPACE_SRGB;
s->stride = s->width * s->bpp;
if (!s->is_audio) {
if (s->is_dummy)
cobalt_warn("Setting up dummy video node %d\n", node);
vdev->v4l2_dev = &cobalt->v4l2_dev;
if (s->is_dummy)
vdev->fops = &cobalt_empty_fops;
else
vdev->fops = s->is_output ? &cobalt_out_fops :
&cobalt_fops;
vdev->release = video_device_release_empty;
vdev->vfl_dir = s->is_output ? VFL_DIR_TX : VFL_DIR_RX;
vdev->lock = &s->lock;
if (s->sd)
vdev->ctrl_handler = s->sd->ctrl_handler;
s->timings = dv1080p60;
v4l2_subdev_call(s->sd, pad, s_dv_timings, 0, &s->timings);
if (!s->is_output && s->sd)
cobalt_enable_input(s);
vdev->ioctl_ops = s->is_dummy ? &cobalt_ioctl_empty_ops :
&cobalt_ioctl_ops;
}
INIT_LIST_HEAD(&s->bufs);
q->type = s->is_output ? V4L2_BUF_TYPE_VIDEO_OUTPUT :
V4L2_BUF_TYPE_VIDEO_CAPTURE;
q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
q->io_modes |= s->is_output ? VB2_WRITE : VB2_READ;
q->drv_priv = s;
q->buf_struct_size = sizeof(struct cobalt_buffer);
q->ops = &cobalt_qops;
q->mem_ops = &vb2_dma_sg_memops;
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
q->min_queued_buffers = 2;
q->lock = &s->lock;
q->dev = &cobalt->pci_dev->dev;
vdev->queue = q;
vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_READWRITE;
if (s->is_output)
vdev->device_caps |= V4L2_CAP_VIDEO_OUTPUT;
else
vdev->device_caps |= V4L2_CAP_VIDEO_CAPTURE;
video_set_drvdata(vdev, s);
ret = vb2_queue_init(q);
if (!s->is_audio && ret == 0)
ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
else if (!s->is_dummy)
ret = cobalt_alsa_init(s);
if (ret < 0) {
if (!s->is_audio)
cobalt_err("couldn't register v4l2 device node %d\n",
node);
return ret;
}
cobalt_info("registered node %d\n", node);
return 0;
}
/* Initialize v4l2 variables and register v4l2 devices */
int cobalt_nodes_register(struct cobalt *cobalt)
{
int node, ret;
/* Setup V4L2 Devices */
for (node = 0; node < COBALT_NUM_STREAMS; node++) {
ret = cobalt_node_register(cobalt, node);
if (ret)
return ret;
}
return 0;
}
/* Unregister v4l2 devices */
void cobalt_nodes_unregister(struct cobalt *cobalt)
{
int node;
/* Teardown all streams */
for (node = 0; node < COBALT_NUM_STREAMS; node++) {
struct cobalt_stream *s = cobalt->streams + node;
struct video_device *vdev = &s->vdev;
if (!s->is_audio)
video_unregister_device(vdev);
else if (!s->is_dummy)
cobalt_alsa_exit(s);
}
}
Codebase Browser
linux