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[参考译文] AM67A：CSI0 在第一个打开的 VC_id 通道上有闪烁

admin
Guru**** 2847400 points
请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1635447/am67a-csi0-has-flicker-on-first-open-vc_id-channel

器件型号： AM67A

您好、

我正在尝试找出仅来自 csi0 第一个虚拟通道的闪烁的根本原因。

我一次可以打开 4 个信道、其中 3 个信道没有闪烁。 如果我只打开 2 个通道、例如 VC_id 2/3、则 VC_id 2 将发生闪烁。 有人以前见过这种情况吗？

这与我在上面提到的相关问题相反。 基本上、帧会提前结束、而不是延迟开始。
我在一个红色框中突出显示了差异。 这种情况大约每 30 秒发生一次、但有时更频繁。
我们正在使用 SDK 11 以及最新的 cdns_csi2rx 补丁。
am67a_csi0_shift.png
e2e.ti.com/.../am67a_5F00_csi0_5F00_flicker.mp4

  • 0
    TI__Guru**** 2847400 points
    请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

    尊敬的 Evan：

    您是否愿意分享“media-ctl"输出“输出？

    谢谢你。

    建中

  • 0
    TI__Guru**** 2847400 points
    请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

    尊敬的建中：

    请在下面找到输出：
    无论我使用什么分辨率、闪烁都会发生、我只能打开一个流、但它仍然存在问题。 

    media-ctl -p
Media controller API version 6.12.43

Media device information
------------------------
driver          j721e-csi2rx
model           TI-CSI2RX
serial
bus info        platform:30102000.ticsi2rx
hw revision     0x1
driver version  6.12.43

Device topology
- entity 1: 30102000.ticsi2rx (6 pads, 6 links, 4 routes)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev0
        routes:
                0/0 -> 1/0 [ACTIVE]
                0/1 -> 2/0 [ACTIVE]
                0/2 -> 3/0 [ACTIVE]
                0/3 -> 4/0 [ACTIVE]
        pad0: SINK
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                [stream:1 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                [stream:2 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                [stream:3 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                <- "cdns_csi2rx.30101000.csi-bridge":1 [ENABLED,IMMUTABLE]
        pad1: SOURCE
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                -> "30102000.ticsi2rx context 1":0 [ENABLED,IMMUTABLE]
        pad2: SOURCE
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                -> "30102000.ticsi2rx context 2":0 [ENABLED,IMMUTABLE]
        pad3: SOURCE
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                -> "30102000.ticsi2rx context 3":0 [ENABLED,IMMUTABLE]
        pad4: SOURCE
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                -> "30102000.ticsi2rx context 4":0 [ENABLED,IMMUTABLE]
        pad5: SOURCE
                -> "30102000.ticsi2rx context 5":0 [ENABLED,IMMUTABLE]

- entity 8: cdns_csi2rx.30101000.csi-bridge (5 pads, 2 links, 4 routes)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev1
        routes:
                0/0 -> 1/0 [ACTIVE]
                0/1 -> 1/1 [ACTIVE]
                0/2 -> 1/2 [ACTIVE]
                0/3 -> 1/3 [ACTIVE]
        pad0: SINK
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                [stream:1 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                [stream:2 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                [stream:3 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                <- "max96724 4-002e":0 [ENABLED,IMMUTABLE]
        pad1: SOURCE
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                [stream:1 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                [stream:2 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                [stream:3 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb ycbcr:601 quantization:full-range]
                -> "30102000.ticsi2rx":0 [ENABLED,IMMUTABLE]
        pad2: SOURCE
        pad3: SOURCE
        pad4: SOURCE

- entity 14: max96724 4-002e (5 pads, 5 links, 4 routes)
             type V4L2 subdev subtype Unknown flags 0
             device node name /dev/v4l-subdev2
        routes:
                1/0 -> 0/0 [ACTIVE]
                2/0 -> 0/1 [ACTIVE]
                3/0 -> 0/2 [ACTIVE]
                4/0 -> 0/3 [ACTIVE]
        pad0: SOURCE
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
                [stream:1 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
                [stream:2 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
                [stream:3 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
                -> "cdns_csi2rx.30101000.csi-bridge":0 [ENABLED,IMMUTABLE]
        pad1: SINK
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
                <- "tevs 13-0039":0 [ENABLED,IMMUTABLE]
        pad2: SINK
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
                <- "tevs 14-003a":0 [ENABLED,IMMUTABLE]
        pad3: SINK
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
                <- "tevs 15-003b":0 [ENABLED,IMMUTABLE]
        pad4: SINK
                [stream:0 fmt:UYVY8_1X16/1920x1080 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
                <- "tevs 16-003c":0 [ENABLED,IMMUTABLE]

- entity 22: tevs 13-0039 (1 pad, 1 link, 0 routes)
             type V4L2 subdev subtype Sensor flags 0
             device node name /dev/v4l-subdev3
        pad0: SOURCE
                [stream:0 fmt:UYVY8_1X16/1920x1080@1/60 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range
                 crop.bounds:(0,0)/1920x1080
                 crop:(0,0)/1920x1080]
                -> "max96724 4-002e":1 [ENABLED,IMMUTABLE]

- entity 26: tevs 14-003a (1 pad, 1 link, 0 routes)
             type V4L2 subdev subtype Sensor flags 0
             device node name /dev/v4l-subdev4
        pad0: SOURCE
                [stream:0 fmt:UYVY8_1X16/1920x1080@1/60 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range
                 crop.bounds:(0,0)/1920x1080
                 crop:(0,0)/1920x1080]
                -> "max96724 4-002e":2 [ENABLED,IMMUTABLE]

- entity 30: tevs 15-003b (1 pad, 1 link, 0 routes)
             type V4L2 subdev subtype Sensor flags 0
             device node name /dev/v4l-subdev5
        pad0: SOURCE
                [stream:0 fmt:UYVY8_1X16/1920x1080@1/60 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range
                 crop.bounds:(0,0)/1920x1080
                 crop:(0,0)/1920x1080]
                -> "max96724 4-002e":3 [ENABLED,IMMUTABLE]

- entity 34: tevs 16-003c (1 pad, 1 link, 0 routes)
             type V4L2 subdev subtype Sensor flags 0
             device node name /dev/v4l-subdev6
        pad0: SOURCE
                [stream:0 fmt:UYVY8_1X16/1920x1080@1/60 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range
                 crop.bounds:(0,0)/1920x1080
                 crop:(0,0)/1920x1080]
                -> "max96724 4-002e":4 [ENABLED,IMMUTABLE]

- entity 40: 30102000.ticsi2rx context 1 (1 pad, 1 link)
             type Node subtype V4L flags 0
             device node name /dev/video2
        pad0: SINK
                <- "30102000.ticsi2rx":1 [ENABLED,IMMUTABLE]

- entity 46: 30102000.ticsi2rx context 2 (1 pad, 1 link)
             type Node subtype V4L flags 0
             device node name /dev/video3
        pad0: SINK
                <- "30102000.ticsi2rx":2 [ENABLED,IMMUTABLE]

- entity 52: 30102000.ticsi2rx context 3 (1 pad, 1 link)
             type Node subtype V4L flags 0
             device node name /dev/video4
        pad0: SINK
                <- "30102000.ticsi2rx":3 [ENABLED,IMMUTABLE]

- entity 58: 30102000.ticsi2rx context 4 (1 pad, 1 link)
             type Node subtype V4L flags 0
             device node name /dev/video5
        pad0: SINK
                <- "30102000.ticsi2rx":4 [ENABLED,IMMUTABLE]

- entity 64: 30102000.ticsi2rx context 5 (1 pad, 1 link)
             type Node subtype V4L flags 0
             device node name /dev/video6
        pad0: SINK
                <- "30102000.ticsi2rx":5 [ENABLED,IMMUTABLE]


    似乎如果我将通道配置保持为仅 2 个通道、那么它可以防止问题发生。 我或许能够调整链路速率、使其适用于我们的应用... 不过、这并不理想。

    我设法使用 2 个数据通道找到了一个链路速率组合、这足以满足我们的应用需求。