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From: "Michal Suchánek" <msuchanek@suse.de>
To: "Enrico Weigelt, metux IT consult" <info@metux.net>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
	Jason Wang <jasowang@redhat.com>,
	linux-kernel@vger.kernel.org, corbet@lwn.net,
	linus.walleij@linaro.org, bgolaszewski@baylibre.com,
	linux-doc@vger.kernel.org, linux-gpio@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	linux-riscv@lists.infradead.org, stefanha@redhat.com
Subject: Re: [PATCH v2 2/2] drivers: gpio: add virtio-gpio guest driver
Date: Wed, 9 Dec 2020 11:34:52 +0100	[thread overview]
Message-ID: <20201209103452.GH6564@kitsune.suse.cz> (raw)
In-Reply-To: <dcc41cf3-ab2d-656e-6fa3-73f231bde92d@metux.net>

On Tue, Dec 08, 2020 at 01:33:02PM +0100, Enrico Weigelt, metux IT consult wrote:
> On 08.12.20 11:10, Michal Suchánek wrote:
> 
> Hi,
> 
> > The console driver provides early console which should initialize
> > without any transport. I have not tested it actually works but the code
> > seems to be there to support this use case.
> 
> What does it do if it hasn't got any transport yet ?
> 
> Just eat the bits or buffer everything, until it gets a transportport
> and sends out later ?

Why would it need the transport?

It's not like the data goes through an actual PCI bus, it is only used
for discovering and configuring the device, right?

Then if you do ad-hoc configuration of the device you do not need the
trasport at all.

Thanks

Michal

WARNING: multiple messages have this Message-ID (diff)
From: "Michal Suchánek" <msuchanek@suse.de>
To: "Enrico Weigelt, metux IT consult" <info@metux.net>
Cc: stefanha@redhat.com, corbet@lwn.net,
	Jason Wang <jasowang@redhat.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	bgolaszewski@baylibre.com, linux-gpio@vger.kernel.org,
	linux-riscv@lists.infradead.org, linus.walleij@linaro.org
Subject: Re: [PATCH v2 2/2] drivers: gpio: add virtio-gpio guest driver
Date: Wed, 9 Dec 2020 11:34:52 +0100	[thread overview]
Message-ID: <20201209103452.GH6564@kitsune.suse.cz> (raw)
In-Reply-To: <dcc41cf3-ab2d-656e-6fa3-73f231bde92d@metux.net>

On Tue, Dec 08, 2020 at 01:33:02PM +0100, Enrico Weigelt, metux IT consult wrote:
> On 08.12.20 11:10, Michal Suchánek wrote:
> 
> Hi,
> 
> > The console driver provides early console which should initialize
> > without any transport. I have not tested it actually works but the code
> > seems to be there to support this use case.
> 
> What does it do if it hasn't got any transport yet ?
> 
> Just eat the bits or buffer everything, until it gets a transportport
> and sends out later ?

Why would it need the transport?

It's not like the data goes through an actual PCI bus, it is only used
for discovering and configuring the device, right?

Then if you do ad-hoc configuration of the device you do not need the
trasport at all.

Thanks

Michal

_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

  reply	other threads:[~2020-12-09 10:35 UTC|newest]

Thread overview: 99+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-03 19:11 [PATCH v2 1/2] drivers: gpio: put virtual gpio device into their own submenu Enrico Weigelt, metux IT consult
2020-12-03 19:11 ` Enrico Weigelt, metux IT consult
2020-12-03 19:11 ` [PATCH v2 2/2] drivers: gpio: add virtio-gpio guest driver Enrico Weigelt, metux IT consult
2020-12-03 19:11   ` Enrico Weigelt, metux IT consult
2020-12-04  3:35   ` Jason Wang
2020-12-04  3:35     ` Jason Wang
2020-12-04  3:35     ` Jason Wang
2020-12-04  9:36     ` Enrico Weigelt, metux IT consult
2020-12-04  9:36       ` Enrico Weigelt, metux IT consult
2020-12-07  3:48       ` Jason Wang
2020-12-07  3:48         ` Jason Wang
2020-12-07  3:48         ` Jason Wang
2020-12-07  9:33         ` Enrico Weigelt, metux IT consult
2020-12-07  9:33           ` Enrico Weigelt, metux IT consult
2020-12-08  2:49           ` Jason Wang
2020-12-08  2:49             ` Jason Wang
2020-12-08  2:49             ` Jason Wang
2021-04-13 11:07       ` Alex Bennée
2021-04-13 11:07         ` Alex Bennée
2021-04-13 11:07         ` Alex Bennée
2020-12-05  7:59     ` Enrico Weigelt, metux IT consult
2020-12-05  7:59       ` Enrico Weigelt, metux IT consult
2020-12-05 19:32       ` Michael S. Tsirkin
2020-12-05 19:32         ` Michael S. Tsirkin
2020-12-05 19:32         ` Michael S. Tsirkin
2020-12-05 20:05         ` Enrico Weigelt, metux IT consult
2020-12-05 20:05           ` Enrico Weigelt, metux IT consult
2020-12-07  3:16           ` Jason Wang
2020-12-07  3:16             ` Jason Wang
2020-12-07  3:16             ` Jason Wang
2020-12-07 13:52           ` Michael S. Tsirkin
2020-12-07 13:52             ` Michael S. Tsirkin
2020-12-07 13:52             ` Michael S. Tsirkin
2020-12-07 20:34             ` Enrico Weigelt, metux IT consult
2020-12-07 20:34               ` Enrico Weigelt, metux IT consult
2020-12-07  3:12         ` Jason Wang
2020-12-07  3:12           ` Jason Wang
2020-12-07  3:12           ` Jason Wang
2020-12-07 13:53           ` Michael S. Tsirkin
2020-12-07 13:53             ` Michael S. Tsirkin
2020-12-07 13:53             ` Michael S. Tsirkin
2020-12-08  2:36             ` Jason Wang
2020-12-08  2:36               ` Jason Wang
2020-12-08  2:36               ` Jason Wang
2020-12-08  7:02               ` Enrico Weigelt, metux IT consult
2020-12-08  7:02                 ` Enrico Weigelt, metux IT consult
2020-12-09  9:31                 ` Jason Wang
2020-12-09  9:31                   ` Jason Wang
2020-12-09  9:31                   ` Jason Wang
2020-12-09 10:33                   ` Enrico Weigelt, metux IT consult
2020-12-09 10:33                     ` Enrico Weigelt, metux IT consult
2020-12-08 10:10         ` Michal Suchánek
2020-12-08 10:10           ` Michal Suchánek
2020-12-08 12:33           ` Enrico Weigelt, metux IT consult
2020-12-08 12:33             ` Enrico Weigelt, metux IT consult
2020-12-09 10:34             ` Michal Suchánek [this message]
2020-12-09 10:34               ` Michal Suchánek
2020-12-05 20:15   ` Howto listen to/handle gpio state changes ? " Enrico Weigelt, metux IT consult
2020-12-05 20:15     ` Enrico Weigelt, metux IT consult
2020-12-08  9:38     ` Linus Walleij
2020-12-08  9:38       ` Linus Walleij
2020-12-08  9:38       ` Linus Walleij
2020-12-08 14:04       ` Enrico Weigelt, metux IT consult
2020-12-08 14:04         ` Enrico Weigelt, metux IT consult
2020-12-08 16:15         ` Grygorii Strashko
2020-12-08 16:15           ` Grygorii Strashko
2020-12-09  8:51         ` Linus Walleij
2020-12-09  8:51           ` Linus Walleij
2020-12-09  8:51           ` Linus Walleij
2020-12-09 11:19           ` Arnd Bergmann
2020-12-09 11:19             ` Arnd Bergmann
2020-12-09 12:53             ` Linus Walleij
2020-12-09 12:53               ` Linus Walleij
2020-12-09 12:53               ` Linus Walleij
2020-12-09 20:22               ` Grygorii Strashko
2020-12-09 20:22                 ` Grygorii Strashko
2020-12-09 20:38                 ` Arnd Bergmann
2020-12-09 20:38                   ` Arnd Bergmann
2020-12-10 13:32                   ` Grygorii Strashko
2020-12-10 13:32                     ` Grygorii Strashko
2021-05-24 11:27   ` Viresh Kumar
2021-05-24 11:27     ` Viresh Kumar
2021-05-25 12:59     ` Enrico Weigelt, metux IT consult
2021-05-25 12:59       ` Enrico Weigelt, metux IT consult
2021-05-26  3:32       ` Viresh Kumar
2021-05-26  3:32         ` Viresh Kumar
2021-07-03  8:05         ` Michael S. Tsirkin
2021-07-03  8:05           ` Michael S. Tsirkin
2021-07-03  8:05           ` Michael S. Tsirkin
2021-07-05  3:51           ` Viresh Kumar
2021-07-05  3:51             ` Viresh Kumar
2021-07-05  3:51             ` Viresh Kumar
2020-12-07  9:55 ` [PATCH v2 1/2] drivers: gpio: put virtual gpio device into their own submenu Andy Shevchenko
2020-12-07  9:55   ` Andy Shevchenko
2020-12-07  9:55   ` Andy Shevchenko
2020-12-07 10:31 ` Bartosz Golaszewski
2020-12-07 10:31   ` Bartosz Golaszewski
2020-12-07 11:22   ` Enrico Weigelt, metux IT consult
2020-12-07 11:22     ` Enrico Weigelt, metux IT consult

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