drm/nouveau: consume the return of large GSP message

[drm/drm-misc.git] / drivers / media / pci / cobalt / cobalt-v4l2.c

// 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,
};

/* 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);
        }
}