From: Stefan Koch <stefan.koch10@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: richard -rw- weinberger <richard.weinberger@gmail.com>
Subject: Re: IMX257 framebuffer problem
Date: Mon, 05 Nov 2012 16:21:34 +0100 [thread overview]
Message-ID: <5097D97E.80203@gmail.com> (raw)
In-Reply-To: <CAFLxGvx-Q3Ye4obNnVbEbEpG8YwecKxEXU0wg11Q1kDrOA1X9w@mail.gmail.com>
If I add "video=imxfb:SVGA-16@60" to kernel command line, then there are
new messages when init fb within BSP file:
Division by zero in kernel.
[<80019ba4>] (unwind_backtrace+0x0/0xf4) from [<8022accc>] (Ldiv0+0x8/0x10)
[<8022accc>] (Ldiv0+0x8/0x10) from [<8022ac9c>] (__aeabi_uidivmod+0x8/0x18)
[<8022ac9c>] (__aeabi_uidivmod+0x8/0x18) from [<80254198>]
(cfb_imageblit+0x1fc/0x4b0)
[<80254198>] (cfb_imageblit+0x1fc/0x4b0) from [<80251c94>]
(soft_cursor+0x158/0x1bc)
[<80251c94>] (soft_cursor+0x158/0x1bc) from [<80251664>]
(bit_cursor+0x4ac/0x4c8)
[<80251664>] (bit_cursor+0x4ac/0x4c8) from [<8024bcd8>]
(fb_flashcursor+0x108/0x124)
[<8024bcd8>] (fb_flashcursor+0x108/0x124) from [<8003cc00>]
(process_one_work+0x188/0x4fc)
[<8003cc00>] (process_one_work+0x188/0x4fc) from [<8003d458>]
(worker_thread+0x130/0x598)
[<8003d458>] (worker_thread+0x130/0x598) from [<80043ef0>]
(kthread+0x8c/0x98)
[<80043ef0>] (kthread+0x8c/0x98) from [<80015268>]
(kernel_thread_exit+0x0/0x8)
Division by zero in kernel.
[<80019ba4>] (unwind_backtrace+0x0/0xf4) from [<8022accc>] (Ldiv0+0x8/0x10)
[<8022accc>] (Ldiv0+0x8/0x10) from [<8022ac9c>] (__aeabi_uidivmod+0x8/0x18)
[<8022ac9c>] (__aeabi_uidivmod+0x8/0x18) from [<80254198>]
(cfb_imageblit+0x1fc/0x4b0)
[<80254198>] (cfb_imageblit+0x1fc/0x4b0) from [<80251c94>]
(soft_cursor+0x158/0x1bc)
[<80251c94>] (soft_cursor+0x158/0x1bc) from [<80251664>]
(bit_cursor+0x4ac/0x4c8)
[<80251664>] (bit_cursor+0x4ac/0x4c8) from [<8024bcd8>]
(fb_flashcursor+0x108/0x124)
[<8024bcd8>] (fb_flashcursor+0x108/0x124) from [<8003cc00>]
(process_one_work+0x188/0x4fc)
[<8003cc00>] (process_one_work+0x188/0x4fc) from [<8003d458>]
(worker_thread+0x130/0x598)
[<8003d458>] (worker_thread+0x130/0x598) from [<80043ef0>]
(kthread+0x8c/0x98)
[<80043ef0>] (kthread+0x8c/0x98) from [<80015268>]
(kernel_thread_exit+0x0/0x8)
Division by zero in kernel.
Without this command line parameter the "cpsr: 0xffffffff pc:
0xfffffff9" error still occurs.
The boot works fine when I add the fb_init as you suggested in the
main.c from kernel.
But I have no /dev/fb0 device. And there are no messages about
framebuffer in dmesg.
Thanks
Am 05.11.2012 11:43, schrieb richard -rw- weinberger:
> On Mon, Nov 5, 2012 at 11:20 AM, Stefan Koch<stefan.koch10@gmail.com> wrote:
>>> What could be the problem?
> Find out what exactly is happening after calling add_imx_fb().
> Call it a bit later so that you can see everything on the UART.
> You can hack the call into init/main.c or something else...
>
next prev parent reply other threads:[~2012-11-05 15:21 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-02 20:44 IMX257 framebuffer problem Stefan Koch
2012-11-05 10:20 ` Stefan Koch
2012-11-05 10:43 ` richard -rw- weinberger
2012-11-05 12:25 ` Stefan Koch
2012-11-05 13:35 ` Stefan Koch
2012-11-05 15:21 ` Stefan Koch [this message]
2012-11-07 14:26 ` Stefan Koch
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