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Message-ID: <67a9e1fa.81a9.17a64c8e7f7.Coremail.chenhuacai@loongson.cn>
Date: Fri, 2 Jul 2021 09:15:26 +0800 (GMT+08:00)
From: 陈华才 <chenhuacai@...ngson.cn>
To: "Bjorn Helgaas" <helgaas@...nel.org>
Cc: "Artem Lapkin" <email2tema@...il.com>, narmstrong@...libre.com,
yue.wang@...ogic.com, khilman@...libre.com,
lorenzo.pieralisi@....com, robh@...nel.org, kw@...ux.com,
jbrunet@...libre.com, christianshewitt@...il.com,
martin.blumenstingl@...glemail.com, linux-pci@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
art@...das.com, nick@...das.com, gouwa@...das.com,
chenhuacai@...il.com
Subject: Re: Re: [PATCH 0/4] PCI: replace dublicated MRRS limit quirks
Hi, Bjorn,
> -----原始邮件-----
> 发件人: "Bjorn Helgaas" <helgaas@...nel.org>
> 发送时间: 2021-07-01 23:46:34 (星期四)
> 收件人: "Artem Lapkin" <email2tema@...il.com>
> 抄送: narmstrong@...libre.com, yue.wang@...ogic.com, khilman@...libre.com, lorenzo.pieralisi@....com, robh@...nel.org, kw@...ux.com, jbrunet@...libre.com, christianshewitt@...il.com, martin.blumenstingl@...glemail.com, linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org, art@...das.com, nick@...das.com, gouwa@...das.com, "Huacai Chen" <chenhuacai@...ngson.cn>
> 主题: Re: [PATCH 0/4] PCI: replace dublicated MRRS limit quirks
>
> [+cc Huacai]
>
> On Sat, Jun 19, 2021 at 02:39:48PM +0800, Artem Lapkin wrote:
> > Replace dublicated MRRS limit quirks by mrrs_limit_quirk from core
> > * drivers/pci/controller/dwc/pci-keystone.c
> > * drivers/pci/controller/pci-loongson.c
>
> s/dublicated/duplicated/ (several occurrences)
>
> Capitalize subject lines.
>
> Use "git log --online" to learn conventions and follow them.
>
> Add "()" after function names.
>
> Capitalize acronyms appropriately (NVMe, MRRS, PCI, etc).
>
> End sentences with periods.
>
> A "move" patch must include both the removal and the addition and make
> no changes to the code itself.
>
> Amlogic appears without explanation in 2/4. Must be separate patch to
> address only that specific issue. Should reference published erratum
> if possible. "Solves some issue" is not a compelling justification.
>
> The tree must be consistent and functionally the same or improved
> after every patch.
>
> Add to pci_ids.h only if symbol used more than one place.
>
> See
> https://lore.kernel.org/r/20210701074458.1809532-3-chenhuacai@loongson.cn,
> which looks similar. Combine efforts if possible and cc Huacai so
> you're both aware of overlapping work.
>
> More hints in case they're useful:
> https://lore.kernel.org/linux-pci/20171026223701.GA25649@bhelgaas-glaptop.roam.corp.google.com/
>
> > Both ks_pcie_quirk loongson_mrrs_quirk was rewritten without any
> > functionality changes by one mrrs_limit_quirk
Does that means keystone and Loongson has the same MRRS problem? And what should I do now?
Huacai
> >
> > Added DesignWare PCI controller which need same quirk for
> > * drivers/pci/controller/dwc/pci-meson.c (PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3)
> >
> > This quirk can solve some issue for Khadas VIM3/VIM3L(Amlogic)
> > with HDMI scrambled picture and nvme devices at intensive writing...
> >
> > come from:
> > * https://lore.kernel.org/linux-pci/20210618063821.1383357-1-art@khadas.com/
> >
> > Artem Lapkin (4):
> > PCI: move Keystone and Loongson device IDs to pci_ids
> > PCI: core: quirks: add mrrs_limit_quirk
> > PCI: keystone move mrrs quirk to core
> > PCI: loongson move mrrs quirk to core
> >
> > --
> > 2.25.1
> >
</chenhuacai@...ngson.cn></email2tema@...il.com></helgaas@...nel.org>
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