[avivo] Error reading EDID

[Nicolas Trangez]

On Tue, 2007-07-17 at 03:32 +0200, Jerome Glisse wrote: 
> Ok, it seems your lvds does not have edid (likely to save one extra bucks).
It wasn't such a cheap laptop ;-) Strange get-edid | parse-edid does
work/detect correct resolution.

> Please give output of avivotool romtables mmap (you need to be root). And
> xorg log of fglrx driver. Also you might want to try using avivotool i2c-monitor
> (try this by changing value at line 309 & 310 to 0x7e4., 0x7e5. or 0x7e6. to
> test on each 3 i2c line).
Xorg log using fglrx is attached. Do note this is running my system
server, xserver 1.2.0, unlike my previous mail using -git.

Here's the output of avivotool romtables mmap (while running the fglrx
server):
sky avivotool # whoami
root
sky avivotool # ./avivotool romtables mmap
can't mmap bios: Success

As discussed on IRC:

sky avivotool # echo 1 > /sys/bus/pci/devices/0000\:01\:00.0/rom 
sky avivotool # cat /sys/bus/pci/devices/0000\:01\:00.0/rom > myrom
#echo won't do ;-)
sky avivotool # file myrom 
myrom: BIOS (ia32) ROM Ext. IBM comp. Video (126*512)
sky avivotool # ./avivotool romtables myrom 

BIOS Tables:
------------

Header at 20a, type: 36 [ATOM]
OEM ID: 01 01
ATOM BIOS detected !

Clock info block:
  SCLK    : 450.000000
  MCLK    : 450.000000
  RefClk  : 27.000000
  PPLL Min: 0.000000
  PPLL Max: 1100.000000
Connector table:
0:    00009011 , Id: 0, Type: VGA, DDC: AVIVO connector #1?, DAC: CRT
1:    00001570 , Id: 5, Type: LVDS, DDC: None, DAC: None
2:    00000052 , Id: 0, Type: STV, DDC: AVIVO connector #1?, DAC: TV
TMDS PLLs:
Maximum frequency: 165000Hz
    0: 165000Hz a0116
    1: 720Hz 1005
    2: 0Hz 9410
    3: 23200Hz 10a3
LVDS timings:
  x: 1280, y: 768, dotclock: 71000
  hblank: 160, hoverplus: 48, hsyncwidth: 32
  vblank: 55, voverplus: 3, vsyncwidth: 6
  power-on delay: 15464


The myrom file is attached, too.

Finally, the i2c-monitor thing. I patched avivotool so I could provide
the GPIO_IN and GPIO_OUT addresses on the command line, I'll send a diff
in a new mail. Here's the output:

sky avivotool # for i in `seq 4 6`; do sudo ./avivotool i2c-monitor 0x7e
${i}c 0x7e${i}8; done
GPIO_IN = 0x7e4c, GPIO_OUT = 0x7e48
I2C bus "DDC" initialized.
I2C device "DDC:ddc2" registered at address 0xA0.
00FFFFFFFFFFFF004C2DD701
GPIO_IN = 0x7e5c, GPIO_OUT = 0x7e58
I2C bus "DDC" initialized.
I2C device "DDC:ddc2" registered at address 0xA0.
0100000000000000D429FAB7
GPIO_IN = 0x7e6c, GPIO_OUT = 0x7e68
I2C bus "DDC" initialized.
I2C device "DDC:ddc2" registered at address 0xA0.
0100000000000000D4A9F2B7

(I have no clue what this is about)

> 
> I will add lvds timing from bios and some code which should be able to figure
> out this timing if even bios does not provide them (in such case your in front
> of very lame hardware and should not give bucks anymore to its manufacturer).
It was this one or no laptop at all... No choice for me.
> 
> best,
> Jerome Glisse
Thanks,

Nicolas
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Xorg.0.log
Type: text/x-log
Size: 56808 bytes
Desc: not available
URL: <http://lists.x.org/archives/xorg/attachments/20070717/0efd8d21/attachment.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: myrom
Type: application/octet-stream
Size: 64512 bytes
Desc: not available
URL: <http://lists.x.org/archives/xorg/attachments/20070717/0efd8d21/attachment.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
URL: <http://lists.x.org/archives/xorg/attachments/20070717/0efd8d21/attachment.pgp>