Hi Andrea,
On 9/15/2017 1:34 PM, Andrea Di Chiara wrote:
> Hi,
> I'm using a RK3288 rockchip board whit kernel rockchip-linux release-4.4.
> It has two USB host and one of them has a DW controller. If I connect a
> UVC camera on it, I get into an incomplete MJPG frame error when enable
> stream with a image format greater or equal than 1920x1080. There isn't
> any related error on dmseg log, even if I enable CONFIG_USB_DWC2_DEBUG.
> So I can check that issue only processing MJPG data or showing that frame.
>
> I'm certain it isn't a camera problem cause if I connect it to the other
> ECHI controller USB port it work properly. I thought it was an bandwidth
> issue cause if I reduce image format the problem disappear. Could it be
> so? If not, what could it be the problem?
>
> This is rk3288.dtsi usb hosts config
>
> usb_host0_ehci: usb@ff500000 {
> compatible = "generic-ehci";
> reg = <0xff500000 0x100>;
> interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
> clocks = <&cru HCLK_USBHOST0>;
> clock-names = "usbhost";
> phys = <&usbphy1>;
> phy-names = "usb";
> status = "disabled";
> };
>
> usb_host1: usb@ff540000 {
> compatible = "rockchip,rk3288-usb", "rockchip,rk3066-usb",
> "snps,dwc2";
> reg = <0xff540000 0x40000>;
> interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
> clocks = <&cru HCLK_USBHOST1>;
> clock-names = "otg";
> dr_mode = "host";
> phys = <&usbphy2>;
> phy-names = "usb2-phy";
> status = "disabled";
> };
>
> thank you for the attention,
> best regards
> Andrea
>
>
>
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Could you please provide more details on observed issue. In which mode
dwc core works: Slave, Buffer DMA or Descriptor DMA? USB speed: high or
full? Split transfers? ISOC IN EP details: max packet size, number of
additional packets? Packet count per (micro)frame and average total
transfer size in (micro)frame in case of 1920x1080? dmesg log also will
be usefull.
Thanks,
Minas
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