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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 我再试一下吧,不知道咋回事,,,编译什么都没问题

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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

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        • 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;
                    }
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                • 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

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                    • 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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