From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from amanaus.varma-el.com (amanaus.varma-el.com [195.144.240.154]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail.varma-el.com", Issuer "mail.varma-el.com" (not verified)) by ozlabs.org (Postfix) with ESMTP id 26E2967A3D for ; Thu, 10 Aug 2006 16:11:32 +1000 (EST) Message-ID: <44DACE0E.2050505@varma-el.com> Date: Thu, 10 Aug 2006 10:11:26 +0400 From: Andrey Volkov MIME-Version: 1.0 To: sudheer Subject: Re: regarding pci vga card output with powerpc References: <44D7097C.7040907@gmail.com> <44DA6A72.7020502@varma-el.com> <44DABF53.5020908@gmail.com> In-Reply-To: <44DABF53.5020908@gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 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