imx6q 下使用TW2835视频采集芯片的问题

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请问，基于IMX6Q改的板子，采集芯片使用的TW2835，系统版本为3.0.35，采集芯片接的CSI0。
在board-mx6q_sabresd.c中添加如下代码：

//mclk 感觉没什么用啊
static struct fsl_mxc_camera_platform_data tw2835_data = {
        .core_regulator    = NULL,
        .io_regulator    = NULL,
        .analog_regulator    = NULL,
        .gpo_regulator    = NULL,
        .mclk = 27000000,
        .mclk_source = 0,
        .csi = 0,
        .io_init = mx6q_csi0_io_init,
        .pwdn = mx6q_csi0_cam_powerdown,
};

//使用CSI0
static struct fsl_mxc_capture_platform_data capture_data[] = {
    {
        .csi = 0,
        .ipu = 0,
        .mclk_source = 0,
        .is_mipi = 0,
    }, {
        .csi = 1,
        .ipu = 0,
        .mclk_source = 0,
        .is_mipi = 1,
    },
};

//I2C地址为0x42
static struct i2c_board_info mxc_i2c1_board_info[] __initdata = {
               ...
        {
                I2C_BOARD_INFO("tw2835", 0x42),/*I2C_BOARD_INFO("tw2835", 0x42)*/
                .platform_data = (void *)&tw2835_data,
        },
             ...
}

在board-mx6q_sabresd.h中修改如下代码：
static iomux_v3_cfg_t mx6q_sabresd_csi0_sensor_pads[] = {
    /* IPU1 Camera */
    MX6Q_PAD_CSI0_DAT12__IPU1_CSI0_D_12,
    MX6Q_PAD_CSI0_DAT13__IPU1_CSI0_D_13,
    MX6Q_PAD_CSI0_DAT14__IPU1_CSI0_D_14,
    MX6Q_PAD_CSI0_DAT15__IPU1_CSI0_D_15,
    MX6Q_PAD_CSI0_DAT16__IPU1_CSI0_D_16,
    MX6Q_PAD_CSI0_DAT17__IPU1_CSI0_D_17,
    MX6Q_PAD_CSI0_DAT18__IPU1_CSI0_D_18,
    MX6Q_PAD_CSI0_DAT19__IPU1_CSI0_D_19,
//    MX6Q_PAD_CSI0_DATA_EN__IPU1_CSI0_DATA_EN,
    MX6Q_PAD_CSI0_MCLK__IPU1_CSI0_HSYNC,
    MX6Q_PAD_CSI0_PIXCLK__IPU1_CSI0_PIXCLK,
    MX6Q_PAD_CSI0_VSYNC__IPU1_CSI0_VSYNC,

    MX6Q_PAD_GPIO_0__CCM_CLKO,        /* camera clk */

//    MX6Q_PAD_SD1_DAT0__GPIO_1_16,        /* camera PWDN */
//    MX6Q_PAD_SD1_DAT1__GPIO_1_17,        /* camera RESET */
};

TW2835的源码是参考的网上的一个单片机源码改编的，源码见附件。
我现在的问题是当我使用V4L2采集视频的时候，报的错误是：
ERROR: v4l2 capture: mxc_v4l_dqueue timeout enc_counter 0
这个错误是因为mxc_v4l2_capture中的camera_callback没有调用么，这个错误应该怎么查呢？
打开V4L2的日志如下：
On Open: Input to ipu size is 720 x 625
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl 80685600
   case VIDIOC_QUERYCAP
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c02c5651
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c0045627
   case VIDIOC_S_INPUT
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl 80085617
   case VIDIOC_G_STD
In mxc_v4l2_g_std
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl 40085618
   case VIDIOC_S_STD
In mxc_v4l2_s_std ff
   Setting standard to PAL ff
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c02c563a
   case VIDIOC_CROPCAP
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c0cc5616
   case VIDIOC_S_PARM
In mxc_v4l2_s_param
   Current capabilities are 0
   Current capturemode is 0  change to 0
   Current framerate is 50  change to 0
   clock_curr=mclk=0
   g_fmt_cap returns widthxheight of input as 720 x 625
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c0cc5605
   case VIDIOC_S_FMT
In MVC: mxc_v4l2_s_fmt
   type=V4L2_BUF_TYPE_VIDEO_CAPTURE
End of mxc_v4l2_s_fmt: v2f pix widthxheight 720 x 576
End of mxc_v4l2_s_fmt: crop_bounds widthxheight 720 x 625
End of mxc_v4l2_s_fmt: crop_defrect widthxheight 720 x 625
End of mxc_v4l2_s_fmt: crop_current widthxheight 720 x 576
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c0cc5604
   case VIDIOC_G_FMT
In MVC: mxc_v4l2_g_fmt type=1
   type is V4L2_BUF_TYPE_VIDEO_CAPTURE
End of mxc_v4l2_g_fmt: v2f pix widthxheight 720 x 576
End of mxc_v4l2_g_fmt: crop_bounds widthxheight 720 x 625
End of mxc_v4l2_g_fmt: crop_defrect widthxheight 720 x 625
End of mxc_v4l2_g_fmt: crop_current widthxheight 720 x 576
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c0145608
   case VIDIOC_REQBUFS
In MVC:mxc_streamoff
MVC: In mxc_free_frame_buf
In MVC:mxc_allocate_frame_buf - size=829440
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c0445609
   case VIDIOC_QUERYBUF
In MVC:mxc_v4l2_buffer_status
In MVC:mxc_mmap
   pgoff=0x18a00, start=0x3387f000, end=0x3394a000
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c0445609
   case VIDIOC_QUERYBUF
In MVC:mxc_v4l2_buffer_status
In MVC:mxc_mmap
   pgoff=0x18300, start=0x33980000, end=0x33a4b000
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c0445609
   case VIDIOC_QUERYBUF
In MVC:mxc_v4l2_buffer_status
In MVC:mxc_mmap
   pgoff=0x18b00, start=0x33b27000, end=0x33bf2000
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c044560f
   case VIDIOC_QBUF
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c044560f
   case VIDIOC_QBUF
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c044560f
   case VIDIOC_QBUF
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl 40085618
   case VIDIOC_S_STD
In mxc_v4l2_s_std ff
   Setting standard to PAL ff
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl 40045612
   case VIDIOC_STREAMON
In MVC:mxc_streamon
In MVC:mxc_v4l_ioctl
In MVC: mxc_v4l_do_ioctl c0445611
   case VIDIOC_DQBUF
In MVC:mxc_v4l_dqueue
ERROR: v4l2 capture: mxc_v4l_dqueue timeout enc_counter 0
VIDIOC_DQBUF failed.In MVC:mxc_v4l_ioctl

In MVC: mxc_v4l_do_ioctl 40045613
   case VIDIOC_STREAMOFF
In MVC:mxc_streamoff
In MVC:mxc_free_frames
In MVC:mxc_v4l_close
In MVC:mxc_streamoff
mxc_v4l_close: release resource
MVC: In mxc_free_frame_buf
In MVC:mxc_free_frames

请各位大神帮帮忙，我的问题出在哪里啊？

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stary666

embedexpert

我是做的wince,倒是可以使用