Hi Peter,
On 05/25/2014 11:43 PM, Peter Bergin wrote:
Hi Eric,
<snip>
In order to understand more what happens during the process I have
enabled dynamic debug in the kernel and turned on messages from mxc_hdmi
and mxc_ipu. I have attached my /var/log/messages if someone more
familiar with the drivers can have a look.
Thanks for the detailed information.
IPU_INT_STAT_5 is classed as Error Interrupts in the Reference Manual.
May 26 06:02:30 nitrogen6x user.warn kernel: imx-ipuv3 2400000.ipu: IPU
Warning - IPU_INT_STAT_5 = 0x00800000
This seems to be a IMDAC_NFB4EOF_ERR_x. NFB4EOF - New-frame before
end-of-frame.
How can I get more understanding what's wrong in the IPU? Any ideas?
Nothing concrete. Perhaps the Freescaler's have some idea.
The only time I've seen the NFB4EOF error has been when I've
had a bug (in a camera driver). I believe it means that there's
an initialization problem.
I've been trying to compare against what I see here,
and the two primary suspects are:
- some quirk of your EDID
- the fact that you're running an older processor revision
(TO 1.0).
I haven't yet found a TO 1.0 board to test against.
I also notice in your output that you're running without the
"only_cea" flag, and you are getting a non-CEA mode:
mxc_hdmi_setup: mxc_hdmi 20e0000.hdmi_video: mxc_hdmi_setup DVI mode
I have also checked /sys/class/graphics/fb0 and made some tests.
root@nitrogen6x:~# cat /sys/class/graphics/fb0/mode
D:1920x1080p-60
This is really odd, because you're not seeing all of the
modes that are reported from U-Boot (e.g. 800x600@60):
root@nitrogen6x:~# cat /sys/class/graphics/fb0/modes
D:720x480p-59
D:720x576p-50
D:1280x720p-50
D:1280x720p-60
D:1920x1080p-50
V:640x480p-60
D:1920x1080p-60
V:640x480p-60
In your post on i.MX Community, you showed 15 "standard" timings:
https://community.freescale.com/thread/324175
Can you forward a hex-dump of your EDID settings from
U-Boot?
U-Boot > i2c dev 1
U-Boot > i2c md 50 0.1 200
0000: 00 ff ff ff ff ff ff 00 1e 6d fb 56 01 01 01 01 .........m.V....
0010: 03 13 01 03 80 33 1d 78 0a ae c5 a2 57 4a 9c 25 .....3.x....WJ.%
0020: 12 50 54 a7 6b 80 b3 00 81 8f 81 80 71 4f 01 01 .PT.k.......qO..
0030: 01 01 01 01 01 01 1a 36 80 a0 70 38 1f 40 30 20 .......6..p8.@0
0040: 35 00 fe 22 11 00 00 1e 02 3a 80 18 71 38 2d 40 5..".....:..q8-@
0050: 53 2c 45 00 fe 22 11 00 00 1e 00 00 00 fd 00 38 S,E..".........8
0060: 3d 1e 53 0f 00 0a 20 20 20 20 20 20 00 00 00 fc =.S... ....
0070: 00 57 32 33 36 31 0a 20 20 20 20 20 20 20 01 61 .W2361. .a
0080: 02 03 21 f1 4e 90 04 03 01 14 12 05 1f 10 13 00 ..!.N...........
0090: 00 00 00 23 09 07 07 83 01 00 00 65 03 0c 00 10 ...#.......e....
00a0: 00 02 3a 80 18 71 38 2d 40 58 2c 45 00 fe 22 11 ..:..q8-@X,E..".
00b0: 00 00 1e 01 1d 80 18 71 1c 16 20 58 2c 25 00 fe .......q.. X,%..
00c0: 22 11 00 00 9e 01 1d 00 72 51 d0 1e 20 6e 28 55 ".......rQ.. n(U
00d0: 00 fe 22 11 00 00 1e 8c 0a d0 8a 20 e0 2d 10 10 .."........ .-..
00e0: 3e 96 00 fe 22 11 00 00 18 00 00 00 00 00 00 00 >..."...........
00f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 de ................
This might help narrow things down. We can fake the
EDID blob from there and see if we can reproduce
your symptoms.
I have tried to set all of the above listed resolutions in modes. The
only resolution that works is V:640x480p-60. With this resolution set I
get signal on HDMI and the display shows my screen.
Also odd is that your 'mode' above shows 'D:1920x1080p-60'.
The 'D' stands for detailed, meaning that your EDID is
customizing the timings a bit from the standard.
https://github.com/boundarydevices/linux-imx6/blob/boundary-imx_3.10.17_1.0.0_ga/drivers/video/fbsysfs.c#L105
A couple of monitors here are showing "S"tandard timings:
root@nitrogen6x:~# cat /sys/class/graphics/fb0/modes
...
S:1920x1080p-60
Even though U-Boot shows "detailed" in the same manner as
your monitor:
U-Boot > i2c edid 50
EDID version: 1.3
Product ID code: 56fb
...
Estabilished timings:
...
Standard timings:
...
1920x1080 59 Hz (detailed)
1920x1080 60 Hz (detailed)
Monitor range limits, horizontal sync: 30-83 kHz, vertical
refresh: 56-61 Hz, max pixel clock: 150 MHz
Monitor name: W2361
Please advise,
Eric
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