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by NewmedFabio
Tue Dec 17, 2019 5:00 pm
Forum: Troubleshooting
Topic: [SOLVED] Rasberry CM3+ DPI (parallel) 7" touch screen with vc4 Opengl driver
Replies: 4
Views: 322

Re: [SOLVED] Rasberry CM3+ DPI (parallel) 7" touch screen with vc4 Opengl driver

Finally I've made it! I downloaded raspberrypi kernel source from github. First, I edited vc4-kms-kippah-7inch-overlay.dts because original display was rgb18, but mine is rgb24bit. I had to enable all the 24 bit because with18 I was missing red color, resulting in a blue tinted display. /* * vc4-kms...
by NewmedFabio
Thu Dec 12, 2019 9:19 am
Forum: Troubleshooting
Topic: [SOLVED] Rasberry CM3+ DPI (parallel) 7" touch screen with vc4 Opengl driver
Replies: 4
Views: 322

Re: Rasberry CM3+ DPI (parallel) 7" touch screen with vc4 Opengl driver

I'm developing on official Raspberry Compute Module IO Board V3.0.
HDMI connector is present but I'm leaving it unused.

A custom board will be used later.
by NewmedFabio
Wed Dec 11, 2019 2:06 pm
Forum: Device Tree
Topic: DPI displays - dpi24 overlay fails on RPi4 (SOLVED)
Replies: 39
Views: 9628

Re: DPI displays - dpi24 overlay fails on RPi4 (SOLVED)

Thank you very much 6by9. Sorry for the wrong thread error, I've started a new one here: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=259119&p=1579303#p1579303 I will follow your instructions and post results there. If I may submit a suggestion, please add information about vc4 ignoring c...
by NewmedFabio
Wed Dec 11, 2019 1:57 pm
Forum: Troubleshooting
Topic: [SOLVED] Rasberry CM3+ DPI (parallel) 7" touch screen with vc4 Opengl driver
Replies: 4
Views: 322

[SOLVED] Rasberry CM3+ DPI (parallel) 7" touch screen with vc4 Opengl driver

Following moderator's suggestion, I've opened a dedicated thread for the issue I've initially illustrated here: https://www.raspberrypi.org/forums/viewtopic.php?f=107&t=244266&p=1579222#p1579222 Sum up is: I'm trying to set up a 7" touch screen that communicate through DPI (parallel RGB) to a Raspbe...
by NewmedFabio
Wed Dec 11, 2019 11:39 am
Forum: Device Tree
Topic: DPI displays - dpi24 overlay fails on RPi4 (SOLVED)
Replies: 39
Views: 9628

Re: DPI displays - dpi24 overlay fails on RPi4 (SOLVED)

Hello, I'm trying to set up a 7" touch screen that communicate through DPI (parallel RGB) to a Raspberrry CM3+. I've updated Raspbian to latest version. I've also verified that provided dpi24.dtbo is identical to the one shared by PhilE on this thread. I'm using the following config.txt file. # For ...

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