Re: [PATCH] [RFC] usb: dwc2: Run the core connect in dwc2_hcd_init()

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On 4/13/20 5:27 PM, Minas Harutyunyan wrote:
> Hi,

Hi,

> On 4/13/2020 6:54 PM, Marek Vasut wrote:
>> On 4/13/20 4:45 PM, Minas Harutyunyan wrote:
>>> Hi,
>>
>> Hi,
>>
>>> On 4/13/2020 6:31 PM, Marek Vasut wrote:
>>>> On STM32MP1 without the STUSB1600 USB-C chip (i.e. with plain USB-OTG
>>>
>>> Could you please provide GSNPSID, GHWCFG1-4 register values for STM32MP1.
>>
>> GSNPSID = 0x4f54330a
>> GHWCFG1 = 0x00000000
>> GHWCFG2 = 0x228fe150
>> GHWCFG3 = 0x03b892e8
>> GHWCFG4 = 0xe3f00030
>>
> STM32MP1 core doesn't support ACG feature: GHWCFG4_ACG_SUPPORTED = 0. 
> So, in your patch for STM32MP1 at least these lines are no meaning:
> 
> +	/* Enable ACG feature in device mode,if supported */
> +	dwc2_enable_acg(hsotg);

The comment says it enables the ACG only if it's supported.

> Looks like you just copied this chirp from dwc2_conn_id_status_change() 
> function.

Yes, that's correct, verbatim.

> dwc2_hsotg_core_init_disconnected() function is device mode function, 
> not sure that it's safe to call it for host mode in dwc2_hcd_init().

OK well, if I don't use this patch and I plug in a USB cable from the
host PC, then the STM32MP1 isn't detected by the host PC. Do you have
any idea what the correct fix would be then ?



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