From: Andrey Volkov <avolkov@varma-el•com>
To: sudheer <urwithsudheer@gmail•com>
Cc: linuxppc-embedded@ozlabs•org
Subject: Re: regarding pci vga card output with powerpc
Date: Thu, 10 Aug 2006 10:11:26 +0400 [thread overview]
Message-ID: <44DACE0E.2050505@varma-el.com> (raw)
In-Reply-To: <44DABF53.5020908@gmail.com>
sudheer wrote:
> Andrey Volkov wrote:
>> urwithsudheer wrote:
>>> Hello All,
>>> I am working with a pci based vga card. I have connected the vga card
>>> next to the pci slot of my target processor on the baseboard.
>>> I have connected a monitor to the vga card.
>>> When i boot linux from minicom, i could see all the kernel log
>>> messages on both the minicom and vga card monitor. But on the vga
>>> monitor, i could not see any messages after asking for login as below:
>>> .
>>> .
>>>
>>> Mounting filesystems
>>> Running depmod
>>> Setting up networking on loopback device:
>>> Setting up networking on eth0:
>>> eth0: PHY is Marvell 88E11x1 (1410cc2)
>>> Adding static route for default gateway to 192.168.3.1:
>>> Setting nameserver to 192.168.0.1 in /etc/resolv.conf:
>>> Starting inetd:
>>>
>>> login:
>>>
>>>
>>> Though i am entering my login and passwd at the minicom, nothing
>>> comes on to the vga monitor. But i am able to write to vga monitor
>>> using the following commands from minicom:
>>>
>>> # echo "Hello" > /dev/tty1
>>> # echo "Hi " > /dev/tty1
>>> My requirement is to get on the vga monitor whatever i am typing on
>>> the minicom after logging into the linux like .
>>> ls or pwd commands.
>>>
>>> Anyone pl help me.
>>>
>>> Thanks & Regards
>>> Sudheer
>>>
>>
>> See Documentation/kernel-parameters.txt.
>>
>> If be short, add:
>>
>> console=/dev/ttySxx console=/dev/tty1
>>
>> (both) to a kernel parameters string.
>>
> I got upto login prompt on the vga monitor only after giving the above
> parameters in my u-boot bootargs.
> u-boot=> set bootargs console=tty1 console=ttyS0,115200.
>
>
> I have added in the serial driver linux/drivers/serial/serial_core.c
> in the function uart_write(struct tty_struct *tty, const unsigned
> char * buf, int count)
> The lines in the if directive.
>
> if (c <= 0)
> break;
> memcpy(circ->buf + circ->head, buf, c);
> /* added to test vga */
> #if 1
> memcpy(tempbuf, circ->buf + circ->head, c);
> for(i=0;i<c;i++)
> printk("%c", tempbuf[i]);
> #endif
>
> circ->head = (circ->head + c) & (UART_XMIT_SIZE - 1);
> buf += c;
>
> Then as i expected, all the letters i enter in the minicom came twice on
> the minicom.
Because printk didn't print to an dedicated device, but to a klog
stream. So check your /etc/inittab and /etc/securetty, its similar
that something wrong in this files.
>
> login:rroooott
> Password: Password:
> login on `ttyS0'ogin on `ttyS0'login[83]: root
>
> ~ # ~ # llss
> ~ # ~ # iiffccoonnffiigg
>
> And whatever i enter on the minicom also gets print on the vga monitor
> but only once.
> When i comment the if directive, On the vga monitor i could see only
> upto login prompt.
>
> I don't know why the printk statement i added in the serial driver
> prints on the vga monitor.
>
> As said by shkatikannan, i am going through the vga driver to copy to
> the frambuffer. But yet couldn't get it exactly in the code where to copy.
>
> Please tell me if i am in the wrong path.
>
> Thanks & Regards
> Sudheer
>
--
Regards
Andrey
next prev parent reply other threads:[~2006-08-10 6:11 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-07 9:35 regarding pci vga card output with powerpc urwithsudheer
2006-08-09 23:06 ` Andrey Volkov
2006-08-10 5:08 ` sudheer
2006-08-10 6:11 ` Andrey Volkov [this message]
2006-08-10 7:10 ` sudheer
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