[9fans] Re: Raspberry pi with a largish screen?

[taylor . garry]

This is my whole config.txt:

[pi4]
kernel=9pi4
arm_64bit=1
[pi3]
kernel=9pi3
arm_64bit=1
[all]
gpu_mem=16
core_freq=250
enable_uart=1
boot_delay=1


hdmi_group=2
hdmi_mode=87
hdmi_cvt=2560 1440 60 3 0 0 1
max_framebuffer_width=2560
max_framebuffer_height=1440
hdmi_pixel_freq_limit=25000

It gives me a 2560x1440 screen with no black borders. That's on a Raspberry Pi 
4.

That is  with 9Front.

Hope that helps.

Garry

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Re: [9fans] cmdline.txt for RPi 4 with QHD screen

[taylor . garry]

Thanks Richard, I will give this a try.
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Re: [9fans] cmdline.txt for RPi 4 with QHD screen

[taylor . garry]

Thanks, I got the Raspbian image and I can see .dtb files there, but can't find 
a clear explanation of how to get the .bin files out of there. For moment I've 
just found an Ethernet cable and now at least my Plan 9 machine is on the 
network.
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Re: [9fans] cmdline.txt for RPi 4 with QHD screen

[taylor . garry]

Please don't apologise Brian, thanks so much for this help.

Looking at my ether4330.c, those two entries for revisions 6 and 9 are present, 
but I did a "walk | grep 43444" over the whole disk and I can't find anything 
like those blob files anywhere. /lib/firmware is empty too.

I think I will look at giving 9legacy a try and try your advice again.

Thanks again.

Garry
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Re: [9fans] cmdline.txt for RPi 4 with QHD screen

[taylor . garry]

Hi Brian, 
Thanks for your help, does it make a difference that I'm using 9front? I don't 
even seem to have a /sys/lib/firmware directory, and I'm not sure I have a 
ether4330.c either. 

I'm sure it's obvious, but I'm a newcomer to Plan 9 and I apologise in advance 
if I'm missing obvious things.

Thanks

Garry
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Re: [9fans] cmdline.txt for RPi 4 with QHD screen

[taylor . garry]

That's great, now I just need to get wifi to work... I can't get a definitive 
answer on RPi 4 wifi is even supported.
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Re: [9fans] cmdline.txt for RPi 4 with QHD screen

[taylor . garry]

This gives me a QHD display on my RPi 4, this is the whole config.txt

[pi4]
kernel=9pi4
arm_64bit=1
[pi3]
kernel=9pi3
arm_64bit=1
[all]
gpu_mem=16
core_freq=250
enable_uart=1
boot_delay=1


hdmi_group=2
hdmi_mode=87
hdmi_cvt=2560 1440 60 3 0 0 1
max_framebuffer_width=2560
max_framebuffer_height=1440
hdmi_pixel_freq_limit=25000

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Re: [9fans] cmdline.txt for RPi 4 with QHD screen

[taylor . garry]

Thanks, I managed to corrupt my card, so I'm going to reformat and try it 
again, I'll post config when (if) I get it to work.
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Re: [9fans] cmdline.txt for RPi 4 with QHD screen

[taylor . garry]

Thanks for the quick reply, I put in the hdmi_enable_4k line and no difference.

My cmdline.txt is:

console=0 user=glenda nobootprompt=local!/dev/sdM0/fs
hdmi_group=2
hdmi_mode=82
hdmi_enable_4kp60=1
hdmi_cvt=2560 1440 60 3 0 0 1
max_framebuffer_width=2560
max_framebuffer_height=1440
hdmi_pixel_freq_limit=4
vgasize=2560x1440x16

It just seems like nothing I do really seems to make much difference.

Cheers

Garry
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[9fans] cmdline.txt for RPi 4 with QHD screen

[taylor . garry]

Hello,
Just trying to set up my RPi 4 for Plan 9. It boots into Plan 9 no problem, but 
at a pretty low resolution with big black borders.

I'm using a 2560x1440 screen connected with HDMI, I run it at 60Hz with other 
OS on the Rpi.

Could someone please suggest a cmdline.txt config for it? At the moment I've 
just followed this guide:

Plan 9: Setting up 9front on a Raspberry Pi (luksamuk.codes) 


and used:

console=0 user=glenda nobootprompt=local!/dev/sdM0/fs

vgasize just doesn't seem to make any difference on it.

Thanks

Garry
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