23:30 | Bertl | anuejn: how's going?
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00:00 | anuejn | Bertl: I would be down for a short session now
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00:05 | anuejn | is there any way I can easily change the video timings for experimentation?
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00:07 | Bertl | yes, as long as you do not want to change the pixel clock
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00:08 | anuejn | is the pixel clock generated by an fclock?
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00:08 | anuejn | or is there another pll involved?
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00:08 | Bertl | PLL
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00:09 | Bertl | in theory you can reconfigure that on the fly, but it's tricky
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00:09 | Bertl | give me a moment to unpack the image
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00:09 | anuejn | okay
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00:13 | Bertl | okay, so you probably tested the init_bin_full/center by now, yes?
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00:13 | anuejn | yes
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00:13 | anuejn | I didnt verify the output but I tested that there is _something_ coming out
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00:14 | anuejn | now I want to have the hdmi output on one port only and play around with the video timings
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00:15 | anuejn | and possibly understand what is going on / what all these magic writes do
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00:15 | Bertl | the relevant parts for setting up the HDMI output image are the gen_init.sh script which configures the timing, the data_init.sh which adjusts the data timing and events and the ./rmem_conf_bin.sh which configures the read address generator
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00:16 | Bertl | so for example, you can reconfigure the HDMI output (at least in theory) to let's say 1080p60 with the following scripts ...
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00:16 | Bertl | ./gen_init.sh 1080p60
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00:17 | Bertl | (this should adjust all the timing stuff to get proper 1080p with 60FPS)
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00:17 | Bertl | ./data_init.sh
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00:17 | Bertl | (this will setup the data and events)
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00:19 | Bertl | ./rmem_conf_bin.sh 64 228 2048 1920 1080
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00:20 | Bertl | (this will configure the 'old' output we had before, I hope :)
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00:20 | Bertl | the magic variables here are the offsets H=64 and V=228 in the 4096x3072 frame
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00:21 | Bertl | the row length (2048) and the actual display size (1920x1080) for 1080p
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00:21 | Bertl | you can then load a test image with mimg like this:
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00:22 | Bertl | ./mimg -F 0 -L 2048 -W 1920 -H 1080 -T4
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00:22 | Bertl | here -F means for 'frame' buffer 0, -L is the row length, -W and -H the image sizes and -T4 is the color test image
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00:23 | Bertl | note that the HDMI output is likely already configured for A or B frames, so it will show a strange pattern
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00:23 | Bertl | you can configure that with
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00:23 | Bertl | scn_reg 30 0x4000
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00:23 | Bertl | scn_reg 31 0x4000
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00:24 | Bertl | for the two HDMI outputs (check which one you are currently using)
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00:24 | Bertl | you should then get a nice color gradient as output
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00:28 | anuejn | let me verify that
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00:42 | anuejn | okay my network setup is falling apart and i have to acknoledge that I am to tired for this
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00:42 | anuejn | maybe tomorrow :)
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00:42 | anuejn | good night!
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00:42 | Bertl | fair enough! sleep well!
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07:27 | se6astian_ | anuejn: please document the commands and what you learned so far somewhere (wiki, etc.) from Bertl
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