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    SOLVED VEYE imx385 驱动问题+

    VEYE MIPI camera
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    • F
      flaty @veye_xumm last edited by

      @veye_xumm
      [ 7.047946] veyecam2m 7-003b: veye camera driver version: 00.01.01
      [ 7.047980] veyecam2m 7-003b: Failed to get power-gpios, maybe no use
      [ 7.048101] veyecam2m 7-003b: supply avdd not found, using dummy regulator
      [ 7.048213] veyecam2m 7-003b: supply dovdd not found, using dummy regulator
      [ 7.048278] veyecam2m 7-003b: supply dvdd not found, using dummy regulator
      [ 7.048303] veyecam2m 7-003b: could not get default pinstate
      [ 7.048309] veyecam2m 7-003b: could not get sleep pinstate
      [ 7.048320] veyecam2m 7-003b: Success to get veyecam2m endpoint data lanes, dts uses 2 lanes
      [ 7.170539] veyecam2m 7-003b: camera id is veyecam2m
      [ 7.173503] veyecam2m 7-003b: sensor is IMX385
      [ 7.173564] veyecam2m 7-003b: board type is ONE board
      [ 7.219705] rockchip-csi2-dphy csi2-dphy0: dphy0 matches m00_b_veyecam2m 7-003b:bus type 5
      以上电源的错误,但是ls /dev/video0 可以看到设备了

      veye_xumm 1 Reply Last reply Reply Quote 0
      • veye_xumm
        veye_xumm @flaty last edited by

        @flaty 这些报错都不用管。 我们的模组不需要这些供电。

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        • F
          flaty @veye_xumm last edited by

          @veye_xumm 测试 出图像了,搞定了 ,谢谢

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          • veye_xumm
            veye_xumm @flaty last edited by

            @flaty 不客气。

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            • F
              flaty @veye_xumm last edited by

              @veye_xumm 现在遇到个新的问题,我不知道是板子硬件支持,我是用DMABUF 作为V4L2的qbuf, 但是返回错误 Failed to queue buffer: Invalid argument,您看一下我这部分代码,是不是该驱动支持,
              //将缓冲区注册到摄像头
              struct v4l2_buffer buf={0};
              struct v4l2_plane planes[1]={0};
              buf.index =0;
              buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
              buf.memory = V4L2_MEMORY_DMABUF;
              buf.length = 1;
              buf.m.planes = planes;
              planes[0].m.fd = frame_buffers[i].dmabuf_fd;
              planes[0].length =buffer_size;

                  if (ioctl(cam_fd, VIDIOC_QBUF, &buf) < 0) {
                      perror("Failed to queue buffer");
                      return -1;
                  }
              veye_xumm 1 Reply Last reply Reply Quote 0
              • veye_xumm
                veye_xumm @flaty last edited by

                @flaty 建议您参考一下yavta的源码。git clone https://github.com/veyeimaging/yavta.git

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                • F
                  flaty @veye_xumm last edited by

                  @veye_xumm 我看了 那个源码 内存采用 普通的内存,我希望的是用 drm 或dmaheap 的,这样可以实现零copy

                  veye_xumm 1 Reply Last reply Reply Quote 0
                  • veye_xumm
                    veye_xumm @flaty last edited by

                    @flaty 我的理解中,相机驱动并不涉及到BUFF模式的限制。实际上数据的收取和防止到内存是rk的mipi接收单元的驱动所决定的。
                    下面是网上插到的信息,希望能有帮助。

                    从你贴的代码来看,报错 Failed to queue buffer: Invalid argument(EINVAL)通常意味着结构体成员设置有问题,或者驱动不支持 DMABUF 模式。结合你写的代码,我帮你逐条排查一下:


                    1. v4l2_buffer 初始化问题

                    你这里写的是:

                    struct v4l2_buffer buf={0};
                    struct v4l2_plane planes[1]={0};
                    

                    这是对的,但要注意 buf.length 必须和 planes 数组元素数量一致,并且 buf.m.planes 不能为空。


                    2. buf 关键字段设置

                    你代码里:

                    buf.index = 0;
                    buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
                    buf.memory = V4L2_MEMORY_DMABUF;
                    buf.length = 1;
                    buf.m.planes = planes;
                    
                    • ✅ buf.type 用 V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE 是对的(说明驱动是 multiplanar 类型)。
                    • ✅ buf.memory 设置成 DMABUF 正确。
                    • ❌ buf.index 不是 0 就行,它必须是你在 VIDIOC_REQBUFS 时分配的 buffer 数量里的一个合法索引。比如如果你 req.count = 4,那么只能用 0..3。

                    3. plane 字段设置

                    planes[0].m.fd = frame_buffers[i].dmabuf_fd;
                    planes[0].length = buffer_size;
                    

                    问题可能出在这里:

                    • planes[0].m.fd:必须是 dma-buf 的有效 fd。
                    • planes[0].length:应该是该 plane 的大小,但 通常驱动并不依赖这个值。有些驱动要求设置 bytesused,即:
                    planes[0].bytesused = buffer_size;
                    

                    如果 bytesused 没设,驱动可能直接返回 EINVAL。


                    4. 建议的正确写法

                    试着改成这样:

                    struct v4l2_buffer buf;
                    struct v4l2_plane planes[VIDEO_MAX_PLANES];  // 通常 >= 1
                    memset(&buf, 0, sizeof(buf));
                    memset(planes, 0, sizeof(planes));
                    
                    buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
                    buf.memory = V4L2_MEMORY_DMABUF;
                    buf.index = i;                   // 循环里的 buffer 索引
                    buf.length = 1;                  // plane 数量
                    buf.m.planes = planes;
                    
                    planes[0].m.fd = frame_buffers[i].dmabuf_fd;
                    planes[0].length = buffer_size;   // plane 总大小
                    planes[0].bytesused = buffer_size; // 必须加上
                    

                    5. 确认驱动是否支持 DMABUF

                    不是所有 V4L2 驱动都支持 V4L2_MEMORY_DMABUF。你可以用下面的方法确认:

                    v4l2-ctl -d /dev/video0 --querycap
                    

                    如果 ioctl 里不支持 DMABUF,就算代码写对了也会 EINVAL。
                    有些驱动只支持 MMAP,那就得用 V4L2_MEMORY_MMAP。


                    👉 建议:先在 QBUF 前打印出 buf 和 planes[0] 的值,确认 index、fd、bytesused 都合理。


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                    • F
                      flaty @veye_xumm last edited by flaty

                      @veye_xumm V4L2-CTL 如下

                      
                      Driver Info:
                      	Driver name      : rkcif
                      	Card type        : rkcif
                      	Bus info         : platform:rkcif-mipi-lvds2
                      	Driver version   : 5.10.198
                      	Capabilities     : 0x84201000
                      		Video Capture Multiplanar
                      		Streaming
                      		Extended Pix Format
                      		Device Capabilities
                      	Device Caps      : 0x04201000
                      		Video Capture Multiplanar
                      		Streaming
                      		Extended Pix Format
                      

                      修改了代码:

                          for(int i = 0; i < req_buffer.count; ++i)
                          {
                              struct v4l2_buffer buf;
                              struct v4l2_plane planes[num_planes];
                              memset(&buf, 0, sizeof(struct v4l2_buffer));
                              memset(&planes, 0, sizeof(planes));
                      
                              buf.index = i;
                              buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
                              buf.memory = V4L2_MEMORY_DMABUF;
                              buf.m.planes = planes;
                              buf.length = 1;
                              buf.bytesused = fmt.fmt.pix.sizeimage;
                              buf.m.planes[0].m.fd = dmabuf_fds[i];
                              planes[0].bytesused = fmt.fmt.pix.sizeimage;
                              planes[0].m.fd = dmabuf_fds[i];
                              planes[0].length = fmt.fmt.pix.sizeimage;
                              printf("index: %d\n bytesused: %d  fd: %d length: %d\n",
                                     buf.index,planes[0].bytesused,planes[0].m.fd ,planes[0].length );
                              if (0 != ioctl(cam_dev_fd, VIDIOC_QBUF, &buf))
                              {
                                  perror("Unable to queue buffer");
                                  return -1;
                              }
                          }
                      

                      我打印了信息,如下:
                      dam申请内存是没问题的
                      alloc dma_heap buffer. fd: 5, raw_buf: 0x7f7df08000, size: 3110400
                      alloc dma_heap buffer. fd: 6, raw_buf: 0x7f7dc10000, size: 3110400
                      alloc dma_heap buffer. fd: 7, raw_buf: 0x7f7d918000, size: 3110400
                      qbuf第一个缓冲区就报错
                      index: 0
                      bytesused: 3110400 fd: 5 length: 3110400
                      Unable to queue buffer: Invalid argument
                      我用了3个缓冲,DMA_AALLOC都正确,目前看似乎是这个相机驱动不支持DMA-BUF的模式,您看呢

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                      • veye_xumm
                        veye_xumm @flaty last edited by

                        @flaty
                        DMA BUFF模式的支持,并不是相机驱动所决定的,而是rockchip的rkcif这个驱动决定的。 数据的传递顺序是:camera-->mipi rx--->rkcif。

                        我查阅了一些资料,显示5.10版本的rk3588的驱动好像是比较明确不支持DMA BUFF模式的。这也就限制了你camera到其他外设驱动的buffer零拷贝传递的能力。 不过如果你只是想零拷贝从camera驱动中拿到数据,进入算法的话,V4L2_MEMORY_MMAP模式应该就可以支持。

                        rkcif驱动在kernel6以上版本是否支持了DMA buffer模式,没有确切的说法。

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                        • F
                          flaty @veye_xumm last edited by

                          @veye_xumm 感谢 感谢,,,mmap的方式 已经OK了,我继续去问一下firefly

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                          • veye_xumm
                            veye_xumm @flaty last edited by

                            @flaty 不客气。如果有后续的解决方案也欢迎告知我一下。

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                            • F
                              flaty @veye_xumm last edited by

                              @veye_xumm 好的 一定

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