From: Petr Mladek <pmladek@suse.com>
To: John Ogness <john.ogness@linutronix.de>
Cc: "Sergey Senozhatsky" <senozhatsky@chromium.org>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Marcos Paulo de Souza" <mpdesouza@suse.com>,
"Samuel Thibault" <samuel.thibault@ens-lyon.org>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Jiri Slaby" <jirislaby@kernel.org>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
"Hugo Villeneuve" <hvilleneuve@dimonoff.com>,
"Fushuai Wang" <wangfushuai@baidu.com>,
"Kees Cook" <kees@kernel.org>,
"Stepan Ionichev" <sozdayvek@gmail.com>,
linux-serial@vger.kernel.org,
"Manuel Lauss" <manuel.lauss@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/2] braille: nbcon: Allow using a serial driver converted to nbcon API as a Braille console
Date: Fri, 25 Sep 2026 16:49:28 +0200 [thread overview]
Message-ID: <araJ-EBntyqOGPkT@pathway.suse.cz> (raw)
In-Reply-To: <87a4p5iejg.fsf@jogness.linutronix.de>
On Fri 2026-09-25 16:42:19, John Ogness wrote:
> On 2026-09-25, Petr Mladek <pmladek@suse.com> wrote:
> > This shows that braille_write() is called form printk() even when
> > braille_co is not in console_list. It is called via vt_console_print()
> > because the graphical console driver (ttyX) is registered.
>
> But isn't that a bug? I thought Braille consoles were not supposed to be
> handled by printk(). Even in this new series you added that exact
> comment.
I believe that it is not a bug. I understand it the way that the
Braille device should show everything that is shown on the virtual
terminal. It should show the printk() messages when they are
printed there by the related console driver.
It is just that printk() is only one source of messages shown
on the terminal. The vt code maintains what is displayed.
Best Regards,
Petr
next prev parent reply other threads:[~2026-09-25 14:49 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-22 7:25 Petr Mladek
2026-09-22 7:25 ` [PATCH 1/2] printk: nbcon: Introduce Braille helpers Petr Mladek
2026-09-25 13:48 ` John Ogness
2026-09-25 14:34 ` Petr Mladek
2026-09-22 7:25 ` [PATCH 2/2] braille: nbcon: Use nbcon atomic console callbacks Petr Mladek
[not found] ` <20260922073728.2ADCD1F000FF@smtp.kernel.org>
2026-09-23 14:39 ` Petr Mladek
2026-09-25 14:34 ` John Ogness
2026-09-24 23:53 ` [PATCH 0/2] braille: nbcon: Allow using a serial driver converted to nbcon API as a Braille console Samuel Thibault
2026-09-25 13:08 ` John Ogness
2026-09-25 14:10 ` Petr Mladek
2026-09-25 14:36 ` John Ogness
2026-09-25 14:49 ` Petr Mladek [this message]
2026-09-25 15:05 ` John Ogness
2026-09-25 15:41 ` Petr Mladek
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