linux-kernel - Re: [PATCH v5 0/5] RISC-V SBI debug console extension support

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Message-ID: <mhng-2a34d0e2-170f-47a5-a688-ab454a70f06b@palmer-ri-x1c9>
Date: Fri, 12 Jan 2024 10:30:37 -0800 (PST)
From: Palmer Dabbelt <palmer@...belt.com>
To: apatel@...tanamicro.com, Greg KH <gregkh@...uxfoundation.org>, nathan@...nel.org
CC: linux-riscv@...ts.infradead.org, Paul Walmsley <paul.walmsley@...ive.com>,
  jirislaby@...nel.org, Conor Dooley <conor@...nel.org>, ajones@...tanamicro.com,
  linux-serial@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject:     Re: [PATCH v5 0/5] RISC-V SBI debug console extension support

On Thu, 11 Jan 2024 06:50:37 PST (-0800), patchwork-bot+linux-riscv@...nel.org wrote:
> Hello:
>
> This series was applied to riscv/linux.git (for-next)
> by Palmer Dabbelt <palmer@...osinc.com>:
>
> On Fri, 24 Nov 2023 12:39:00 +0530 you wrote:
>> The SBI v2.0 specification is now frozen. The SBI v2.0 specification defines
>> SBI debug console (DBCN) extension which replaces the legacy SBI v0.1
>> functions sbi_console_putchar() and sbi_console_getchar().
>> (Refer v2.0-rc5 at https://github.com/riscv-non-isa/riscv-sbi-doc/releases)
>>
>> This series adds support for SBI debug console (DBCN) extension in
>> Linux RISC-V.
>>
>> [...]
>
> Here is the summary with links:
>   - [v5,1/5] RISC-V: Add stubs for sbi_console_putchar/getchar()
>     https://git.kernel.org/riscv/c/f503b167b660
>   - [v5,2/5] RISC-V: Add SBI debug console helper routines
>     https://git.kernel.org/riscv/c/f43fabf444ca
>   - [v5,3/5] tty/serial: Add RISC-V SBI debug console based earlycon
>     https://git.kernel.org/riscv/c/c77bf3607a0f
>   - [v5,4/5] tty: Add SBI debug console support to HVC SBI driver
>     https://git.kernel.org/riscv/c/88ead68e764c
>   - [v5,5/5] RISC-V: Enable SBI based earlycon support
>     https://git.kernel.org/riscv/c/50942ad6ddb5
>
> You are awesome, thank you!

Nathan points out that this has some semantic conflicts with a patch in 
Greg's TTY tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/?id=f32fcbedbe9290565e4eac3fd7c4c451d5478787

So I think the best bet is to wait on Greg's patch to land in Linus' 
tree, and then base a v6 of this patch set on that merged patch.  I'm 
going to drop this one from for-next.