Re: [PATCH v6 4/4] phy: exynos5-usbdrd: Calibrate LOS levels for exynos5420/5800

[Kishon Vijay Abraham I]

Hi,

On Wednesday 10 September 2014 01:26 PM, Vivek Gautam wrote:
> On Wed, Sep 10, 2014 at 10:53 AM, Vivek Gautam <gautam.vivek@xxxxxxxxxxx> wrote:
>> On Wed, Sep 10, 2014 at 10:23 AM, Felipe Balbi <balbi@xxxxxx> wrote:
>>> On Wed, Sep 10, 2014 at 09:09:57AM +0530, Vivek Gautam wrote:
>>>> On Wed, Sep 10, 2014 at 9:07 AM, Vivek Gautam <gautam.vivek@xxxxxxxxxxx> wrote:
>>>>> adding Julius here,
>>>>
>>>> i think i had missed adding Julius for this entire series :-(
>>>> I should be more careful with the CC list in future.
>>>> Added his chromium id, since that seems to be more active.
>>>>
>>>>>
>>>>>
>>>>> On Tue, Sep 9, 2014 at 8:12 PM, Felipe Balbi <balbi@xxxxxx> wrote:
>>>>>> On Tue, Sep 09, 2014 at 07:19:50AM +0530, Vivek Gautam wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>>
>>>>>>> On Mon, Sep 8, 2014 at 7:14 PM, Felipe Balbi <balbi@xxxxxx> wrote:
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> On Mon, Sep 08, 2014 at 09:53:09AM +0530, Vivek Gautam wrote:
>>>>>>>>> On Fri, Sep 5, 2014 at 11:26 PM, Felipe Balbi <balbi@xxxxxx> wrote:
>>>>>>>>>> On Thu, Sep 04, 2014 at 12:01:19PM +0530, Vivek Gautam wrote:
>>>>>>>>>>>> Don't we have phy_power_on()
>>>>>>>>>>>> for that ? It looks like you could just as well do this from
>>>>>>>>>>>> phy_power_on() ?
>>>>>>>>>>>
>>>>>>>>>>> No, unfortunately keeping these calibration settings in phy_power_on()
>>>>>>>>>>> doesn't help, since we need to do this after XHCI reset has happened.
>>>>>>>>>>
>>>>>>>>>> teach xHCI about PHYs ?
>>>>>>>>>
>>>>>>>>> sorry i couldn't understand you here.
>>>>>>>>> Aren't we trying to do the same with Heikki's patch about dwc3 :
>>>>>>>>> [PATCH 6/6] usb: dwc3: host: convey the PHYs to xhci
>>>>>>>>>
>>>>>>>>> and the 2nd patch in this series :
>>>>>>>>> [PATCH v6 2/4] usb: host: xhci-plat: Get PHYs for xhci's hcds
>>>>>>>>>
>>>>>>>>> Is there something else that is expected ?
>>>>>>>>
>>>>>>>> right, use that to call phy_init() at the right time, then you need to
>>>>>>>> add a new ->calibrate() method which, likely, will only be used by you
>>>>>>>> ;-)
>>>>>>>
>>>>>>> so you mean, the xhci should itself call phy_init() at a time suitable,
>>>>>>> so that ->calibrate() is not required at all ?
> 
> but wait, dwc3 does a phy_init() already, then how xhci will be able to
> do that again. We can't do phy_init() multiple times right ?

right. I think we should split and do phy ops separately for dwc3 host and gadget?

Thanks
Kishon
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