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| 07:20.26 | larie | hey |
| 07:20.34 | larie | how to convert doc to fb2? |
| 07:20.42 | larie | or pdf to fb2... |
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| 09:24.46 | quitte | does anyone know how to calculate glamo's clocks from its pll settings? |
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| 14:02.47 | quitte | Weiss: any idea why the glamo pll1 and pll2 are badly aligned? i can't help but think that matching 48Mhz to 90Mhz is asking for trouble. |
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| 17:39.31 | DocScrutinizer | well, the basic way a pll works allows for virtually arbitrary divisors |
| 17:41.29 | DocScrutinizer | divide the 48MHz pll osc clock by 48, the 90MHZ by 90, then feed both 1MHz signals to the pll comparator that assures to adjust one of both voltage-controlled oscillators to be exactly 48/90 of the other |
| 17:41.49 | DocScrutinizer | if that's what you were concerned about |
| 17:42.26 | DocScrutinizer | obviously you can go for other ratios as well, like 481/900 |
| 17:43.44 | DocScrutinizer | afaik the glamo bus is only loosely related to RAM bus, I think it is more like "async" and just suspends the CPU until the transaction got ACK |
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| 17:46.01 | DocScrutinizer | (which btw is one of the most annoying details of glamo: it just suspends CPU basically, so no benefit whatsoever by delegating tasks to glamo, CPU can't do anything reasonable concurrently anyway as it can't access RAM. That's what I seem to recall about this whole glamo nightmare) |
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| 17:46.55 | DocScrutinizer | quitte: Weiss: ^^^ |
| 17:49.59 | quitte | yes. i didn't quite get which clocks are generated from which pll,yet. and the glamo making the cpu stop is something I#m concerned about. |
| 17:50.44 | quitte | but i don't know how to quantify changes. e.g. i set the pll2 to 100mhz and i have no idea wether effects are imaginary or not. |
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| 18:38.33 | DocScrutinizer | without looking into any details, I'd say changing a glamo clock from 90 -> 100 will just cause glamo to run unstable but not result in any noticeable increase of any speed of rendering/whatever |
| 18:43.25 | DocScrutinizer | also watch out for uSD access which is handled by glamo |
| 18:44.13 | quitte | yeah i know ;) i don't use the usd and have no important data on it. |
| 18:46.06 | quitte | after what i've seen so far I think that all the clock setup of glamo should be moved from the kernel to the bootloader. but i guess that's too late now. |
| 18:55.02 | DocScrutinizer | I guess bootloader needs to do it anyway, unless it'S a bootloader that doesn't need any display (aka qi) |
| 18:55.46 | quitte | qi still does part of it. for the mmc access. |
| 18:55.56 | DocScrutinizer | aaah, true :-) |
| 18:56.14 | DocScrutinizer | anyway kernel will redo it unconditionally |
| 18:56.19 | quitte | but i guess if cpu frequency scaling were made to work ... |
| 18:57.08 | quitte | DocScrutinizer: the thing is that I think that the kernel can't redo it if the memory clock is set to 133 without preparing glamo first |
| 18:58.19 | DocScrutinizer | why? |
| 19:01.11 | quitte | too short a delay from address setup to write enable or some other timing issue |
| 19:02.56 | DocScrutinizer | hmm, would need close inspection/evaluation. Quite possibly you're right, then access to glamo would have to take care about making sure that memory clock is set to 100 before doing actual chat to glamo |
| 19:04.30 | quitte | maybe the bootloader could pass some kind of glamo initialized flag? |
| 19:13.37 | quitte | would signing an nda enable me to discuss the datasheets here - if that even is still possible? |
| 19:21.41 | DocScrutinizer | you may discuss the datasheets any time. Signing NDA is basically possible but might get a bit cumbersome as you'd need to negotiate that with Sean MossPultz. I heard he's about to let "OM lawyers check the details" or sth. I'd suggest to /join #openmoko-cdevel and ask there, there are others interested in glamo datasheet as well, and I promise *I* at least wouldn't mind if somebody of those who have access to the datasheet will grant |
| 19:21.43 | DocScrutinizer | you access to excerpts from it |
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| 19:38.50 | quitte | DocScrutinizer: ok thanks. I'll just assume you have some authority to say so. |
| 19:39.09 | DocScrutinizer | not really |
| 19:39.41 | DocScrutinizer | I'm just the ex-OM-EE from western hemisphere |
| 19:39.55 | DocScrutinizer | emphasis on EX |
| 19:40.13 | quitte | good enough. seeing as smedia doesn't even exist anymore. |
| 19:40.23 | DocScrutinizer | that'S the point ;-D |
| 19:40.42 | DocScrutinizer | http://admin-trac.openmoko.org/trac/ticket/1671 |
| 19:45.38 | quitte | are the memory controller registers in the register specs? |
| 20:06.44 | Weiss | yes |
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| 20:27.20 | DocScrutinizer | quitte: still here? |
| 20:27.29 | DocScrutinizer | hey Weiss :-) |
| 20:29.09 | DocScrutinizer | Weiss: which of the files as listed in that trac-ticket above are actually relevant? |
| 20:30.18 | Weiss | only the full datasheet has the clock stuff: Glamo 3362 Datasheet V1.0-Full-FIC.pdf |
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| 20:42.22 | DocScrutinizer | Weiss: thanks |
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