你好

我使用stm32mp135faf7芯片，自己layout板子，使用ov5640摄像头模块，把图像显示到显示屏上，无法得到正常的camera图像，显示的是花屏，但用手或者光源靠近camera，能看到显示有变化。

dts配置如下

&dcmipp { status = "okay"; pinctrl-names = "default", "sleep"; pinctrl-0 = <&dcmipp_pins_mx>; pinctrl-1 = <&dcmipp_sleep_pins_mx>;

port { dcmipp_0: endpoint { remote-endpoint = <&ov5640_0>; bus-width = <8>; hsync-active = <0>; vsync-active = <0>; pclk-sample = <1>; pclk-max-frequency = <77000000>; }; }; };

ov5640: camera@3c { compatible = "ovti,ov5640"; reg = <0x3c>; clocks = <&clk_ext_camera>; clock-names = "xclk"; DOVDD-supply = <&vdd>; //reset-gpios = <&gpioh 4 (GPIO_ACTIVE_LOW | GPIO_PUSH_PULL)>; //rotation = <180>; status = "okay";

port { ov5640_0: endpoint { remote-endpoint = <&dcmipp_0>; bus-width = <8>; bus-type = <5>; data-shift = <2>; hsync-active = <0>; vsync-active = <0>; pclk-sample = <1>; pclk-max-frequency = <77000000>; }; }; };

请教一下 应该如何解决

云小饮 发表于 2024-7-10 14:32
有可能是你采样后的数据传到显示屏的分辨率出错了，摄像头模块应该有例程吧，可以对照看一下
...

找到原因了，entity显示格式是yuv与设置的rgb565不一致。根因还在查

media-ctl -p

Media controller API version 6.1.28

Media device information

driver dcmipp model DCMIPP MDEV serial bus info platform:dcmipp hw revision 0x0 driver version 6.1.28

Device topology

• entity 1: dcmipp_parallel (2 pads, 2 links) type V4L2 subdev subtype Unknown flags 0 device node name /dev/v4l-subdev0 pad0: Sink [fmt:RGB565_2X8_LE/640x480 field:none colorspace:rec709] <- "ov5640 1-003c":0 [ENABLED,IMMUTABLE] pad1: Source [fmt:RGB565_2X8_LE/640x480 field:none colorspace:rec709] -> "dcmipp_dump_postproc":0 [ENABLED,IMMUTABLE]
• entity 4: dcmipp_dump_postproc (2 pads, 2 links) type V4L2 subdev subtype Unknown flags 0 device node name /dev/v4l-subdev1 pad0: Sink [fmt:RGB565_2X8_LE/640x480@1/30 field:none colorspace:rec709 compose.bounds:(0,0)/640x480 compose:(0,0)/640x480] <- "dcmipp_parallel":1 [ENABLED,IMMUTABLE] pad1: Source [fmt:RGB565_2X8_LE/640x480@1/30 field:none colorspace:rec709 crop.bounds:(0,0)/640x480 crop:(0,0)/640x480] -> "dcmipp_dump_capture":0 [ENABLED,IMMUTABLE]
• entity 7: dcmipp_dump_capture (1 pad, 1 link) type Node subtype V4L flags 0 device node name /dev/video0 pad0: Sink <- "dcmipp_dump_postproc":1 [ENABLED,IMMUTABLE]
• entity 15: ov5640 1-003c (1 pad, 1 link) type V4L2 subdev subtype Sensor flags 0 device node name /dev/v4l-subdev2 pad0: Source [fmt:UYVY8_2X8/640x480@1/30 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range] -> "dcmipp_parallel":0 [ENABLED,IMMUTABLE]

有可能是你采样后的数据传到显示屏的分辨率出错了，摄像头模块应该有例程吧，可以对照看一下