[PATCH 0/4] PCI: replace dublicated MRRS limit quirks

[Huacai Chen]

Hi, Art,

On Mon, Jul 5, 2021 at 4:35 PM Art Nikpal <email2tema at gmail.com> wrote:
>
> > Does that means keystone and Loongson has the same MRRS problem? And what should I do now?
>
> Look like yes ! and  amlogic has the same problem.
> I think somebody need to rewrite it all to one common quirk for this problem.
>
> If no one has any objection, I can try to remake it again.
But, Loongson platform has newer revision of hardware, and the MRRS
quirk has changed, please see:
https://patchwork.kernel.org/project/linux-pci/list/?series=509497

Huacai
>
> On Fri, Jul 2, 2021 at 9:15 AM 陈华才 <chenhuacai at loongson.cn> wrote:
> >
> > Hi, Bjorn,
> >
> > > -----原始邮件-----
> > > 发件人: "Bjorn Helgaas" <helgaas at kernel.org>
> > > 发送时间: 2021-07-01 23:46:34 (星期四)
> > > 收件人: "Artem Lapkin" <email2tema at gmail.com>
> > > 抄送: narmstrong at baylibre.com, yue.wang at Amlogic.com, khilman at baylibre.com, lorenzo.pieralisi at arm.com, robh at kernel.org, kw at linux.com, jbrunet at baylibre.com, christianshewitt at gmail.com, martin.blumenstingl at googlemail.com, linux-pci at vger.kernel.org, linux-arm-kernel at lists.infradead.org, linux-amlogic at lists.infradead.org, linux-kernel at vger.kernel.org, art at khadas.com, nick at khadas.com, gouwa at khadas.com, "Huacai Chen" <chenhuacai at loongson.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 at loongson.cn></email2tema at gmail.com></helgaas at kernel.org>