Thanks for the info, Hannes. I agree with you that I could have met my requirements (of showing "applicative" output to the LCD and "technical/debug" output to the serial port) with CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE. To be totally honest, I had not seen this config and was attracted to how the video device did it.
For the sake of argumentation only, I will raise the question whether CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE breaks NETCONSOLE. If I understand correctly, this config will force the console to use only the serial device. I could imagine use cases for netconsole and LCD.
I'm asking the question, really, as this is just from my reading of the code. I haven't tested with netconsole.
My feeling is that there should be a more generic way of saying whether a device should register to stdio or not. My preference would go to an API over individual configs for each device. Neither of the two solutions are ideal nor completely implemented as this time.
Anatolij, based on Hannes info, if you want to backtrack on this, I'm open both ways.
Thanks, Stephane ________________________________________ From: U-Boot [u-boot-bounces@lists.denx.de] on behalf of Hannes Schmelzer [hannes@schmelzer.or.at] Sent: Tuesday, December 01, 2015 12:41 PM To: Anatolij Gustschin; sayotte.tyco@gmail.com Cc: u-boot@lists.denx.de; trini@konsulko.com Subject: Re: [U-Boot] [PATCH] LCD: Add an option to skip registration as an stdio output
hi,
sorry i was absent a few days from u-boot (writing vxWorks drivers :-() ...
but, do we really need this ?
i had same problem on my b&r boards, were we printout something on lcd but console should remain on stdout/stdin.
what about:
int overwrite_console(void) { return 1; }
and activate #define CONFIG_SYS_CONSOLE_IS_IN_ENV #define CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
should do the same i think.
best regards, Hannes
On 2015-11-19 21:54, Anatolij Gustschin wrote:
On Tue, 3 Nov 2015 11:14:49 -0500 sayotte.tyco@gmail.com wrote:
From: Stephane Ayotte sayotte@tycoint.com
This patch adds an option to skip the registration of LCD stdio ouput for boards that want to show different text on LCD than on serial output (or the active stdout selected by the environment variable).
Signed-off-by: Stephane Ayotte sayotte@tycoint.com
This implementation is similar to what has been added to cfb_console.c by Stefan Roese sr@denx.de per commit 6cc7ba9e on 05/15/2009
I am sending this patch using sayotte.tyco@gmail.com as our regular smtp server sayotte@tycoint.com causes patch issues.
common/lcd.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
applied to u-boot-video/master, thanks!
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