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Subject: Re: [PATCH v2 0/3] Add basic support for Loongson 7A1000 bridge chip
To:     Jiaxun Yang <jiaxun.yang@flygoat.com>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        Huacai Chen <chenhc@lemote.com>
References: <1584932355-3642-1-git-send-email-yangtiezhu@loongson.cn>
 <F85A21BA-31A2-4230-BFF8-7B5F355BB125@flygoat.com>
Cc:     linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
        Xuefeng Li <lixuefeng@loongson.cn>
From:   Tiezhu Yang <yangtiezhu@loongson.cn>
Message-ID: <79f960cc-4360-8941-a89d-a61dd86a16bd@loongson.cn>
Date:   Tue, 24 Mar 2020 17:31:08 +0800
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On 03/24/2020 03:49 PM, Jiaxun Yang wrote:
>
> 于 2020年3月23日 GMT+08:00 上午10:59:12, Tiezhu Yang <yangtiezhu@loongson.cn> 写到:
>> The Loongson 7A1000 bridge chip has been released for several years
>> since the second half of 2017, but it is not supported by the Linux
>> mainline kernel while it only works well with the Loongson internal
>> kernel version. When I update the latest version of Linux mainline
>> kernel on the Loongson 3A3000 CPU and 7A1000 bridge chip system,
>> the boot process failed and I feel depressed.
>>
>> The 7A1000 bridge chip is used a lot with 3A3000 or 3A4000 CPU in
>> the most Loongson desktop and sever products, it is important to
>> support Loongson 7A1000 bridge chip by the Linux mainline kernel.
>>
>> This patch series adds the basic support for the Loongson 7A1000
>> bridge chip, when apply these patches based on linux-5.6-rc7, the
>> boot process is successful and we can login normally used with the
> Is it still true without IRQ driver?

No, I will modify the description.

>
>> latest firmware and discrete graphics card, the next work to do is
>> power management and some other controller device drivers.
>>
>> Additionally, when I git clone mips code [1], the speed is too slow
>> and clone always failed, so this patch series is based on the latest
>> linux-5.6-rc7 [2].
> You can clone stable tree from mirrors in China[1] at first,
> then add mips tree as a remote and fetch from it.
> In this way it will only download a minimal difference set from foreign server so won't spend a lot of time.

Thanks for your suggestion.

>
>
> [1]: https://mirrors.tuna.tsinghua.edu.cn/git/linux-stable.git
>
>> If you have any questions and suggestions, please let me know.
>>
>> Thanks,
>>
>> Tiezhu Yang
>>
>> v2:
>>   - The split patch series about Loongson vendor ID and SATA controller
>>     has been merged into the linux-block.git by Jens Axboe [3].
>>
>>   - Think about using hierarchy IRQ domain in the patch of interrupt
>>     controller, and this maybe depend on the patch series by Jiaxun
>>     ("Modernize Loongson64 Machine"), so the patch about interrupt is
>>     not included in this v2 patch series.
>>
>> [1] git clone
>> https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git
>> [2] git clone https://github.com/torvalds/linux.git
>> [3]
>> https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-next&id=9acb9fe18d86
>> https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-next&id=e49bd683e00b
>>
>> Tiezhu Yang (3):
>>   MIPS: Loongson: Get host bridge information
>>   MIPS: Loongson: Add DMA support for 7A1000
>>   MIPS: Loongson: Add PCI support for 7A1000
>>
>> arch/mips/include/asm/mach-loongson64/boot_param.h | 20 ++++++
>> arch/mips/loongson64/dma.c                         |  9 ++-
>> arch/mips/loongson64/env.c                         | 20 ++++++
>> arch/mips/loongson64/init.c                        | 17 +++++
>> arch/mips/pci/ops-loongson3.c                      | 72
>> ++++++++++++++++++++--
>> 5 files changed, 131 insertions(+), 7 deletions(-)