Re: fbcon woes with closed source framebuffer kernel module

[Lior Balkohen <balkohen@gmail.com>]

>Are you sure fbcon is using your framebuffer?  Check lsmod output.
>If fbcon is using the driver, and your kernel did not crash

telnet 192.168.2.150
Trying 192.168.2.150...
Connected to 192.168.2.150.
Escape character is '^]'.


welcome on your dreambox! - Kernel 2.6.9 (17:49:20).
dreambox login: root
Password:


BusyBox v1.01 (2005.09.08-20:13+0000) Built-in shell (ash)
Enter 'help' for a list of built-in commands.

~ > cd /tmp
/tmp > ls -l *.ko
-rw-r--r--    1 root     root        39224 Sep 16 17:49 fbcon.ko
-rw-r--r--    1 root     root         9236 Sep 16 17:49 font.ko
/tmp > lsmod
Module                  Size  Used by
usbhid 22016 0 - Live 0xc389e000
head 338412 45 - Live 0xc38c9000
/tmp > insmod ./font.ko
/tmp > insmod ./fbcon.ko
/tmp > lsmod
Module                  Size  Used by
fbcon 31732 65 - Live 0xc391d000
font 7008 1 fbcon, Live 0xc3896000
usbhid 22016 0 - Live 0xc389e000
head 338412 46 - Live 0xc38c9000

head is used 45 times and after loading fbcon, 46 times, so i think,
fbcon is using the driver.

>then that closed source driver is already implementing all the drawing
>functions needed by fbcon.

i don't think so:

nm head.ko | grep pfb
000125bc t pfb_check_var
00003a28 d pfb_default
00000000 t pfb_fix
00012c50 t pfb_pan_display
0001edb0 b pfb_pseudo_palette
00012798 t pfb_set_par
00012af4 t pfb_setcolreg

>Check the output of fbset -i and post it here.

/tmp > ./fbset -i

mode "720x576-171"
    # D: 50.000 MHz, H: 54.825 kHz, V: 170.793 Hz
    geometry 720 576 720 576 8
    timings 20000 64 64 32 32 64 2
    laced true
    rgba 8/16,8/8,8/0,8/24
endmode

Frame buffer device information:
    Name        : Pallas FB
    Address     : 0xa0901000
    Size        : 2093056
    Type        : PACKED PIXELS
    Visual      : PSEUDOCOLOR
    XPanStep    : 1
    YPanStep    : 1
    YWrapStep   : 1
    LineLength  : 720
    Accelerator : No

>Why don't you ask IBM?
actually, the driver does not come from ibm, but from dream
multimedia, an stb manufacturer, i asked them, and they said, they
cannot answer any questions about drivers because they have a non
disclosure agreement with ibm. ;-)


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