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2014-08-27 07:11 <apelete> Hi larsc
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2014-08-27 07:11 <apelete> larsc: is it possible to do early debugging on mips ?
2014-08-27 07:14 <apelete> trying to debug the dma-jz4740.c driver (modified to work with jz4770), and my kernel seems to be going into panic *before* kgdb driver is loaded
2014-08-27 07:14 <apelete> http://paste.debian.net/117757/
2014-08-27 07:16 <apelete> which could mean dma driver is loaded before the serial_8250 driver
2014-08-27 07:19 <apelete> larsc: is it possible to load the serial driver earlier in order to have early debugging ?
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2014-08-27 08:16 <larsc> apelete: yes, I think we have support for early_printk on jz4740
2014-08-27 08:17 <larsc> set CONFIG_EARLY_PRINTK=y
2014-08-27 08:18 <larsc> see arch/mips/jz4740/prom.c and prom_putchar()
2014-08-27 08:19 <apelete> larsc: I set CONFIG_EARLY_PRINTK=y on jz4770 too, but it didn't help
2014-08-27 08:21 <larsc> if there are multiple UARTs you may have to select the correct one
2014-08-27 08:22 <larsc> check the jz4770 prom_putchar function
2014-08-27 08:26 <apelete> larsc: looks like prom_putchar is writing to a UART2_BASE register address
2014-08-27 08:26 <apelete> does that mean it might be the wrong UART to write to ?
2014-08-27 08:27 <larsc> I don't know, which uart are you connected to?
2014-08-27 08:27 <apelete> ttyS2 from the cmdline point of view
2014-08-27 08:28 <larsc> sounds like uart 2
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2014-08-27 08:30 <apelete> larsc: compared to an old jz4740 boot log, serial driver is loaded late too -> http://paste.debian.net/117756/
2014-08-27 08:30 <apelete> loads at line 82
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2014-08-27 09:06 <larsc> early printk bypasses the serial driver
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2014-08-27 09:43 <apelete> larsc: so it's not possible to launch the serial driver earlier than what is done on jz4740 ?
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2014-08-27 12:40 <DocScrutinizer05> make sure your UART doesn't load DMA driver ;-)
2014-08-27 12:41 <DocScrutinizer05> aaah >><larsc> early printk bypasses the serial driver<< makes sense
2014-08-27 12:43 <DocScrutinizer05> wpwrak: (browsers)
2014-08-27 12:43 <DocScrutinizer05> TECHNISCHE WARNUNG TW-T14/0079
2014-08-27 12:43 <DocScrutinizer05>     Titel: Sicherheitsupdate für den Google Chrome Browser
2014-08-27 12:45 <DocScrutinizer05> >> Der Google Chrome Browser vor Version 37.0.2062.94 für Windows, Mac und     Linux enthält mehrere kritische Sicherheitslücken. Diese können von einem     entfernten Angreifer ausgenutzt werden, um beliebiegen Programmcode     auszuführen, .....<<
2014-08-27 12:46 <DocScrutinizer05> oops ECHAN
2014-08-27 12:46 <DocScrutinizer05> well, not that bad anyway
2014-08-27 13:01 <nicksydney> FREE! http://www.engadget.com/2014/08/27/imagination-tech-mips-dev-board/?ncid=rss_truncated
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2014-08-27 14:28 <ysionneau> would be cool if Ingenic would liberate as open source HDL its Xburst core
2014-08-27 14:29 <ysionneau> like it would be cool if I win the lottery also
2014-08-27 14:40 <larsc> otror space travel!
2014-08-27 14:40 <larsc> for everybody!
2014-08-27 14:45 <wpwrak> DocScrutinizer05:  hmm,sounds nasty. thanks ! let's hope chromium on ubuntu gets fixed quickly
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2014-08-27 15:24 <wpwrak> whitequark: speaking of quantum conscience and such ... http://www.smbc-comics.com/index.php?id=2657#comic
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2014-08-27 15:37 <arhuaco> wpwrak: Old but good! (new to me).
2014-08-27 15:50 <wpwrak> (old) yeah, found smbc only recently. and i can't spend all day to catch up :)
2014-08-27 15:52 <arhuaco> wpwrak: Happens to me with XKCD. I do not know if it is (just) me, but now they are way too many and I can no longer keep up with them. Even if they are in my feeds.
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2014-08-27 15:55 <wpwrak> yes, the list keeps growing. slowly, but steadily. so far, i can still manage but the comicalypse seems inevitable in the long run
2014-08-27 15:56 <pcercuei> wej, hi, I have a request for GMU: make the file selector point to $HOME when you start GMU, instead of the data directory (which is generally in /usr/share in Linux)
2014-08-27 15:59 * kristianpaul removed its xkcd rss time ago
2014-08-27 16:00 <wej> pcercuei: hi, actually, that directory is configurable (DefaultFileBrowserPath), which by default is set to the working directory (which might be /usr/share as you said). The reason for that "current directory" default simply was that on the handhelds were Gmu originated, it was useful to assume that directory. On PCs and similar devices the user's home directory probably is more useful.
2014-08-27 16:00 <wej> maybe i'll change the default to the user's home
2014-08-27 16:00 <pcercuei> hmmok
2014-08-27 16:01 <pcercuei> I could do DefaultFileBrowserPath=/usr/local/home but then it may break if we decide to move the home directory
2014-08-27 16:02 <pcercuei> other than that, I made an OPK for it
2014-08-27 16:02 <wej> maybe i could add support for ~ in the path, so one could specify that and it picks the right home directory of the user, whatever that is
2014-08-27 16:02 <pcercuei> ah, that would be great, yes
2014-08-27 16:02 <wej> i'll add it to my todo list ;)
2014-08-27 16:02 <wej> so i don't forget :D
2014-08-27 16:02 <pcercuei> thanks!
2014-08-27 16:03 <pcercuei> you said that GMU is resolution-independent now?
2014-08-27 16:03 <wej> yes, it is
2014-08-27 16:04 <wej> you can even run it windowed and resize its window
2014-08-27 16:04 <wej> on platforms that support windows that is ;)
2014-08-27 16:04 <pcercuei> and does it use the highest resolution by default?
2014-08-27 16:04 <pcercuei> or the current screen's resolution?
2014-08-27 16:05 <wej> usually you specify the desired resolution it Gmu's config file
2014-08-27 16:05 <wej> SDL_frontend.Width=640
2014-08-27 16:05 <wej> SDL_frontend.Height=480
2014-08-27 16:05 <wej> like so
2014-08-27 16:06 <wej> and then there is SDL_frontend.Fullscreen=yes/no
2014-08-27 16:06 <wej> for devices that support windowed and fullscreen operation
2014-08-27 16:06 <pcercuei> so if I set SDL_frontend.Width=640 SDL_frontend.Height=480 but I only support 320x240 maximum, will it crash?
2014-08-27 16:07 <wej> it won't crash, but it won't run properly either. the sdl frontend will try to use that resolution and if that fails it does not continue to start
2014-08-27 16:07 <pcercuei> hmmok
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2014-08-27 19:40 <apelete> larsc: testing kgdb with a working kernel -> http://paste.debian.net/117889/
2014-08-27 19:41 <apelete> it loads after the serial driver as expected, which itself loads late in the boot process, after the lcd driver...
2014-08-27 19:42 <apelete> ...looks like I'm screwed :-(
2014-08-27 19:43 <larsc> I still don[t understand the problem
2014-08-27 19:44 <mth> what do you want to debug with it?
2014-08-27 19:45 <larsc> or is the problem that kgdb is not working?
2014-08-27 19:45 <apelete> I want to debug the dma driver
2014-08-27 19:46 <mth> do you need to catch it before it initializes?
2014-08-27 19:46 <apelete> problem is the kernel is crashing in the dma driver before kgdb driver is loaded
2014-08-27 19:46 <larsc> you can try to build the dma driver as a module
2014-08-27 19:46 <apelete> didn't think about that, silly me
2014-08-27 19:47 <mth> although that won't work if the module is on an SD card and the mmc driver depends on the DMA module...
2014-08-27 19:47 <apelete> mth: by the time I start working on the mmc driver I expect the dma one to be stable enough
2014-08-27 19:48 <apelete> at least I hope so :)
2014-08-27 20:02 <pcercuei> kgdb requires you to hit some keyboard keys, no?
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2014-08-27 20:19 <wh1tequark> fun thing: http://hackaday.com/2014/08/27/thp-semifinalst-laser-solder-paste/
2014-08-27 20:19 <wh1tequark> if pointless a bit
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2014-08-27 20:33 <apelete> pcercuei: the kernel can be configured to automatically pause during boot and wait for gdb to be attached to it
2014-08-27 21:06 <DocScrutinizer05> that's cool
2014-08-27 21:15 <whitequark> DocScrutinizer05: the laser thing?
2014-08-27 21:29 <DocScrutinizer05> laser thing? nah, gdb sync
2014-08-27 21:29 <whitequark> oh, right
2014-08-27 21:34 <DocScrutinizer05> laser thing the 3W lasers intrigue me. Would like to use those for proper soldering tasks - though the absolute failure to work on covered solder points like BGA is obvious
2014-08-27 21:35 <whitequark> indeed, it's sorta pointless except as a curiosity
2014-08-27 21:36 <whitequark> I wonder what is the absorption spectrum of solder
2014-08-27 21:36 <whitequark> like, maybe IR won't be reflected? I don't know
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2014-08-27 21:47 <DocScrutinizer05> WOW!  https://sites.google.com/site/dtrlpf/home/diodes/ndb7a75-3-5w-445nm-diodes
2014-08-27 21:49 <whitequark> huh
2014-08-27 21:51 <DocScrutinizer05> with *that* laser power you actually can start tooling
2014-08-27 21:52 <whitequark> I dunno, you can get a tube with hundreds or thousands of W pretty easily
2014-08-27 21:55 <DocScrutinizer05> I don't think you can get it (operating) for that pricetag
2014-08-27 21:55 <DocScrutinizer05> nor is it in a format where you could integrate it into e.g. a CNC head
2014-08-27 21:57 <DocScrutinizer05> nevertheless I might be interested *where* to get such tube easily. Since I'm musing about building a nice show laser since long
2014-08-27 21:58 <DocScrutinizer05> it's simply I'm adicted to light emitting objects, and particularly monochromatic ones. And when they are even coherent and focused, all the better
2014-08-27 21:59 <DocScrutinizer05> doesn't mean the tritium light keyring in my pocket lost its fascination ;-)
2014-08-27 22:02 <whitequark> DocScrutinizer05: ebay
2014-08-27 22:03 <whitequark> some CO2 laser tube is pretty cheap
2014-08-27 22:06 <whitequark> well
2014-08-27 22:06 <whitequark> $600
2014-08-27 22:06 <whitequark> maybe half that if you DIY
2014-08-27 22:16 <DocScrutinizer05> CO2 is fine, but has one obvious flaw for an addict to light emitting objects - that addiction is pretty much a perception driven thing
2014-08-27 22:17 <DocScrutinizer05> yeah, I checked for 50W range CO2 lasers nly 6 months ago. Wasn't too easy to spot something that sounded like it might actually pan out and work in the end
2014-08-27 22:29 <DocScrutinizer05> the 70$ blue one is awesome  https://sites.google.com/site/dtrlpf/home/diodes/9mm-445nm