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by galelio
Fri Dec 22, 2017 3:33 pm
Forum: Graphics programming
Topic: run the HDMI and TFT screen simultaneously
Replies: 37
Views: 33875

Re: run the HDMI and TFT screen simultaneously

OK, so just found this out and not tried it. sudo raspi-config select advanced options and find the graphics driver option. Select KMS option. (not fake KMS) Now it should start up with the display running on HDMI and DSI. You can apparently control it with xrandr and KMS ioctls. That's the bit I d...
by galelio
Wed Dec 20, 2017 5:32 pm
Forum: Graphics programming
Topic: run the HDMI and TFT screen simultaneously
Replies: 37
Views: 33875

Re: run the HDMI and TFT screen simultaneously

OK, so with the current driver, we are unlikely to support this. However I believe the new ARM side graphics driver (enable with raspi-config) DOES support twin screens like this. So that might be an option. Thanks for your help, however i am not sure how to enable the new ARM graphics driver, do y...
by galelio
Tue Dec 19, 2017 3:57 pm
Forum: Graphics programming
Topic: run the HDMI and TFT screen simultaneously
Replies: 37
Views: 33875

Re: run the HDMI and TFT screen simultaneously

i know that some apps like omxplayer can write to the HDMI directly while the TFT is active and responding, so it feels like its a software problem not a hardware. Or more likely somewhere in between, firmware. My guess is that at least you will need some support in the kernel for two framebuffers....
by galelio
Sat Dec 09, 2017 2:11 pm
Forum: Graphics programming
Topic: run the HDMI and TFT screen simultaneously
Replies: 37
Views: 33875

Re: run the HDMI and TFT screen simultaneously

From https://community.nxp.com/thread/462751 Victor Linnik Employee Oct 24, 2017 11:59 PM You can use fbset utility to manage framebuffers. Have a great day, Victor This may also help. http://www.tldp.org/HOWTO/pdf/Framebuffer-HOWTO.pdf from what i understand is that you can use fbset to manage the...
by galelio
Sat Dec 09, 2017 11:24 am
Forum: Graphics programming
Topic: run the HDMI and TFT screen simultaneously
Replies: 37
Views: 33875

Re: run the HDMI and TFT screen simultaneously

Yea i can switch between the 2 screens just fine, it a matter of where the /dev/fb0 is pointing, but i was hoping to have a second framebuffer to write to both of them simultaneously. i know that some apps like omxplayer can write to the HDMI directly while the TFT is active and responding, so it fe...
by galelio
Sat Dec 09, 2017 11:03 am
Forum: Graphics programming
Topic: run the HDMI and TFT screen simultaneously
Replies: 37
Views: 33875

run the HDMI and TFT screen simultaneously

I have been looking everywhere to solve my problem but couldn't find a solution so i thought i might ask here. I would like to run both screens Touch screen (DSI) and the hdmi at the same time, however i can only find one framebuffer /dev/fb0 is there anyway to add a second framebuffer? adding an ad...

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