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| mithro | cr1901_modern: You should set up remote access (either serial or network) to your board. | 00:02 |
|---|---|---|
| mithro | cr1901_modern: That way you can look at the kernel output even when X is borked | 00:02 |
| mithro | cr1901_modern: also, turn on the extra debugging stuff I linked you to | 00:03 |
| cr1901_modern | mithro: Already have a serial connection. I need to figure out why X is segfaulting. Will do re: debugging stuff | 00:13 |
| cr1901_modern | mithro: What I know so far. It's segfaulting here: https://github.com/robclark/xserver/blob/master/hw/xfree86/common/xf86Cursor.c#L108 b/c pScr->modes is in fact a NULL pointer. Whether that's due to my board not liking HDMI2USB or some other interaction-of-components, I don't know yet. | 00:17 |
| tpb | Title: xserver/xf86Cursor.c at master · robclark/xserver · GitHub (at github.com) | 00:17 |
| cr1901_modern | I'm (perhaps naively) assuming that if there's not a NULL check here, the code's assuming that pScr->modes can't ever be NULL, sans h/w problems or radiation :). | 00:18 |
| mithro | cr1901_modern: I'm guessing it is having problems reading or parsing the EDID data | 00:31 |
| cr1901_modern | mithro: Interestingly enough, Xorg.0.log claims to be able to parse the data... at the very least, I can read the string "HDMI2USB" and the display mode 800x600 is detected. | 00:34 |
| cr1901_modern | mithro: EDIDs don't match, so that's prob a hint | 00:41 |
| cr1901_modern | https://gist.github.com/cr1901/5dcb886856b2b93fc5b371ec70e73de1 | 00:43 |
| tpb | Title: edid_fail.txt · GitHub (at gist.github.com) | 00:43 |
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| mithro | cr1901_modern: check dmesg | 00:49 |
| cr1901_modern | mithro: Need to find that debug link to make messages more verbose | 00:49 |
| cr1901_modern | dmesg hasn't put out anything since 23 seconds after boot | 00:50 |
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| cr1901_modern | mithro: Okay... let's see what happens... | 00:54 |
| cr1901_modern | root@arm:~# cat /sys/module/drm/parameters/debug | 00:54 |
| cr1901_modern | 6 | 00:54 |
| cr1901_modern | mithro: Aha... here we go. Linux doesn't like it :) https://gist.github.com/cr1901/5dcb886856b2b93fc5b371ec70e73de1#file-dmesg-log | 00:56 |
| tpb | Title: Xorg.0.log · GitHub (at gist.github.com) | 00:56 |
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| xiaohongaiweno | hi | 01:03 |
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| mithro | Not using 800x600 mode: BAD | 02:25 |
| mithro | cr1901_modern: I wonder if our modeline is borked in some way | 02:26 |
| mithro | cr1901_modern: go look up what a valid 800x600 modeline should be and use that? :P | 02:26 |
| cr1901_modern | mithro: I can do that :P. But the received EDID != what was intended to be sent | 02:32 |
| mithro | cr1901_modern: Oh? | 02:32 |
| cr1901_modern | mithro: I formatted what was sent vs recv'd here https://gist.github.com/cr1901/5dcb886856b2b93fc5b371ec70e73de1#file-edid_fail-txt | 02:33 |
| tpb | Title: Xorg.0.log · GitHub (at gist.github.com) | 02:33 |
| cr1901_modern | First 21 bytes are identical, but looks like synchronization goes bad or something? | 02:33 |
| mithro | cr1901_modern: when you set the mode in the firmware, it's not going to be the default value, right? | 02:33 |
| mithro | cr1901_modern: How did you figure out what is suppose to be sent? | 02:34 |
| cr1901_modern | mithro: I thought the default_edid WAS what was sent | 02:34 |
| cr1901_modern | mithro: You're saying that the Memory initialized at line 24 of edid.py is altered programmatically during firmware init? | 02:36 |
| mithro | cr1901_modern: Yes | 02:36 |
| mithro | cr1901_modern: see the edid.c file | 02:36 |
| cr1901_modern | mithro: Then ignore my comment for now :P | 02:36 |
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| mithro | xfxf: http://www.jaycar.com.au/p/XC4618?utm_source=XC4618&utm_medium=Email&utm_campaign=HCAUAugust16 | 03:31 |
| tpb | Title: Pan and Tilt Action Camera Bracket Mount for 9G Servos | Jaycar Electronics (at www.jaycar.com.au) | 03:31 |
| cr1901_modern | mithro: This is the function that decides the EDID is bad. http://lxr.free-electrons.com/source/drivers/gpu/drm/omapdrm/omap_connector.c#L205 I'll play around more tomorrow. Lines 238-244 are of interest. Not sure how they work yet | 04:11 |
| tpb | Title: Linux/drivers/gpu/drm/omapdrm/omap_connector.c - Linux Cross Reference - Free Electrons (at lxr.free-electrons.com) | 04:11 |
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| ssk1328 | mithro: I have added description about a problem I am facing in a neat doc. This also contains ideas of how I am going to proceed further and some block desciptions on connections. Can you please review this and help me out. Link to code in the doc itself. | 21:48 |
| ssk1328 | https://docs.google.com/document/d/1g1c2IwCVxVzSHWdXbZ746HP-fnM4y1WqFuBZNkLi5mw/edit?usp=sharing | 21:48 |
| tpb | Title: Mixer Block Design - Google Docs (at docs.google.com) | 21:48 |
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