| bluerise | cinap_lenrek: I think mntre-disp is a better than disp2. I did some stuff in disp2 that maybe aren't that nice, you should check the diff | 00:05 |
|---|---|---|
| bluerise | I think I went from dcss to the other one in disp2, not sure | 00:05 |
| bluerise | it's been some time | 00:05 |
| minute | this is becoming the hardest problem in computer science ^^ | 00:09 |
| minute | an open source software demonstrates how to solve a problem, still, noone can understand how it does that nor reproduce it | 00:10 |
| cinap_lenrek | http://okturing.com/src/13653/body | 00:14 |
| cinap_lenrek | ^- how *NOT* to turn on the backlight | 00:14 |
| cinap_lenrek | (it does not work) | 00:14 |
| minute | peeks and pokes | 00:15 |
| minute | i can't see from the pokes if you set it to 100% or 0% | 00:16 |
| cinap_lenrek | i'm not sure on the theory of operation of the pwm yet | 00:16 |
| cinap_lenrek | so i'm just changing the sample register | 00:17 |
| cinap_lenrek | the first SAR is 0 | 00:17 |
| cinap_lenrek | later 0xFFFF | 00:17 |
| minute | the frequency should stay the same (like 10 khz) and the duty cycle determines the brightness IIRC | 00:17 |
| cinap_lenrek | 10khz.... hmmmm | 00:18 |
| cinap_lenrek | ok | 00:18 |
| minute | not sure right now if a duty cycle of 0 or 100 turns it fully on | 00:18 |
| minute | % that is | 00:18 |
| + mtm (~mtm@c-73-27-62-116.hsd1.fl.comcast.net) | 00:26 | |
| - S0rin (QUIT: Ping timeout: 248 seconds) (~S0rin@user/s0rin) | 00:47 | |
| + S0rin (~S0rin@user/s0rin) | 00:49 | |
| mtm | roon | 00:51 |
| mtm | oops, wrong window | 00:51 |
| - chomwitt (QUIT: Ping timeout: 260 seconds) (~chomwitt@athe730-c-multi-500.home.otenet.gr) | 00:53 | |
| - mjw (QUIT: Quit: Leaving) (~mark@gnu.wildebeest.org) | 00:55 | |
| cinap_lenrek | the devicetree arguments is pwms = <&pwm2 0 10000> | 00:59 |
| cinap_lenrek | first is the channel, second is the period in *NANOSECONDS* | 00:59 |
| cinap_lenrek | so 10000ns is 100khz not 10khz | 00:59 |
| cinap_lenrek | ok | 01:11 |
| cinap_lenrek | lets check the counter | 01:11 |
| cinap_lenrek | in case the clock is fucked | 01:11 |
| cinap_lenrek | otherwise, is here some gpio usable for output that is easy to check? | 01:12 |
| cinap_lenrek | like some led on the board? | 01:12 |
| cinap_lenrek | maybe my assumption is just wrong and we have to bring up the edp bridge before we can turn on the backlight? | 01:13 |
| cinap_lenrek | thats a signal going into the panel directly? | 01:13 |
| cinap_lenrek | ha | 01:14 |
| cinap_lenrek | i'll just try the usb port rest :) | 01:14 |
| - bkeys (QUIT: Remote host closed the connection) (~Thunderbi@static-198-54-135-37.cust.tzulo.com) | 01:22 | |
| + bkeys (~Thunderbi@static-198-54-135-37.cust.tzulo.com) | 01:22 | |
| cinap_lenrek | gpio1.14? | 01:24 |
| cinap_lenrek | here we go | 01:25 |
| minute | cinap_lenrek: 100khz will work too, i used 10khz in the past | 01:36 |
| minute | cinap_lenrek: the pwm goes directly to the panel, and it will light up completely independently from any edp stuff | 01:36 |
| cinap_lenrek | hm, ok | 01:37 |
| minute | i brought up the panel with the fpga module too | 01:37 |
| minute | the backlight i mean (and some colorbars from the edp chip) | 01:37 |
| minute | (it has a color bars test mode register) | 01:37 |
| minute | cinap_lenrek: what kinda duty cycles did you try? | 01:38 |
| cinap_lenrek | half the period | 01:40 |
| cinap_lenrek | and the period being 25Mhz/100000 == 250 | 01:41 |
| cinap_lenrek | ah! | 01:43 |
| cinap_lenrek | i found something | 01:43 |
| cinap_lenrek | pinctrl_pwm2: pwm2grp { | 01:43 |
| cinap_lenrek | fsl,pins = < MX8MQ_IOMUX_SPDIF_RX_PWN2_OUT 0x16 >; } | 01:44 |
| cinap_lenrek | lemme make sure the pwm output is actually muxed out | 01:44 |
| cinap_lenrek | LIGHTS ON! | 01:48 |
| cinap_lenrek | here we gooo | 01:48 |
| cinap_lenrek | minute: everything works now! | 01:50 |
| cinap_lenrek | thanks again! :) | 01:51 |
| minute | great! | 01:51 |
| cinap_lenrek | next: i2c controller driver and make the color strips on | 01:51 |
| minute | cool | 01:51 |
| cinap_lenrek | spend the whole day mostly with the clock forrest | 01:51 |
| minute | there was a community post about how to get to color bars with pokes, have you seen that? | 01:52 |
| cinap_lenrek | yes | 01:52 |
| minute | ok cool | 01:54 |
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