Re: [PATCH V2 0/5] Add support to defer core initialization

From: Vidya Sagar <vidyas@nvidia.com>
To: Kishon Vijay Abraham I <kishon@ti.com>
Cc: <jingoohan1@gmail.com>, <gustavo.pimentel@synopsys.com>,
	<lorenzo.pieralisi@arm.com>, <andrew.murray@arm.com>,
	<bhelgaas@google.com>, <thierry.reding@gmail.com>,
	<Jisheng.Zhang@synaptics.com>, <jonathanh@nvidia.com>,
	<linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<kthota@nvidia.com>, <mmaddireddy@nvidia.com>,
	<sagar.tv@gmail.com>
Subject: Re: [PATCH V2 0/5] Add support to defer core initialization
Date: Mon, 3 Feb 2020 15:07:57 +0530	[thread overview]
Message-ID: <ebd5fe6b-0713-a4bf-8eff-600c088d2667@nvidia.com> (raw)
In-Reply-To: <ca911119-da45-4cbd-b173-2ac8397fd79a@ti.com>


On 1/23/2020 3:25 PM, Kishon Vijay Abraham I wrote:
> External email: Use caution opening links or attachments
> 
> 
> Hi Vidya Sagar,
> 
> On 23/01/20 2:54 pm, Vidya Sagar wrote:
>> Hi Kishon,
>> Apologies for pinging again. Could you please review this series?
>>
>> Thanks,
>> Vidya Sagar
>>
>> On 1/11/2020 5:18 PM, Vidya Sagar wrote:
>>> Hi Kishon,
>>> Could you please review this series?
>>>
>>> Also, this series depends on the following change of yours
>>> http://patchwork.ozlabs.org/patch/1109884/
>>> Whats the plan to get this merged?
> 
> I've posted the endpoint improvements as a separate series
> http://lore.kernel.org/r/20191231100331.6316-1-kishon@ti.com
> 
> I'd prefer this series gets tested by others. I'm also planning to test
> this series. Sorry for the delay. I'll test review and test this series
> early next week.
Hi Kishon,
Just wanted to know if you got time to test review my patches.

Thanks,
Vidya Sagar

> 
> Thanks
> Kishon
> 
>>>
>>> Thanks,
>>> Vidya Sagar
>>>
>>> On 1/3/20 3:37 PM, Vidya Sagar wrote:
>>>> EPC/DesignWare core endpoint subsystems assume that the core
>>>> registers are
>>>> available always for SW to initialize. But, that may not be the case
>>>> always.
>>>> For example, Tegra194 hardware has the core running on a clock that
>>>> is derived
>>>> from reference clock that is coming into the endpoint system from host.
>>>> Hence core is made available asynchronously based on when host system
>>>> is going
>>>> for enumeration of devices. To accommodate this kind of hardwares,
>>>> support is
>>>> required to defer the core initialization until the respective
>>>> platform driver
>>>> informs the EPC/DWC endpoint sub-systems that the core is indeed
>>>> available for
>>>> initiaization. This patch series is attempting to add precisely that.
>>>> This series is based on Kishon's patch that adds notification mechanism
>>>> support from EPC to EPF @ http://patchwork.ozlabs.org/patch/1109884/
>>>>
>>>> Vidya Sagar (5):
>>>>     PCI: endpoint: Add core init notifying feature
>>>>     PCI: dwc: Refactor core initialization code for EP mode
>>>>     PCI: endpoint: Add notification for core init completion
>>>>     PCI: dwc: Add API to notify core initialization completion
>>>>     PCI: pci-epf-test: Add support to defer core initialization
>>>>
>>>>    .../pci/controller/dwc/pcie-designware-ep.c   |  79 +++++++-----
>>>>    drivers/pci/controller/dwc/pcie-designware.h  |  11 ++
>>>>    drivers/pci/endpoint/functions/pci-epf-test.c | 118 ++++++++++++------
>>>>    drivers/pci/endpoint/pci-epc-core.c           |  19 ++-
>>>>    include/linux/pci-epc.h                       |   2 +
>>>>    include/linux/pci-epf.h                       |   5 +
>>>>    6 files changed, 164 insertions(+), 70 deletions(-)
>>>>