Raspberry Pi 4 – Official 7” Touch Screen

Michael_ZPF

I tried nightly 11.0.9 and beta version 11.0.0. With both versions the touch screen was initialized (Rainbow square and backlight) but not used.

If a HDMI display is connected, the device starts on it without using the touchscreen.

Did anybody managed to get the official 7” touch screen to work?

smieschek

Hi @Michael_ZPF, currently we only support HDMI displays. The DSI connector isn't integrated, yet.

Michael_ZPF

Thanks @smieschek for the fast response,
Is there a place where all already integrated functions and features are listed for the RBP4?

Do you have a timeframe for the support of the DSI connector (tomorrow, next week, next month, next year, …)?

Thanks,
Michael

smieschek

Hi @Michael_ZPF ,
There are two sources for these information. On the one hand we have our release notes where the integrated functions are listed. On the other hand we have our knowledge base where we collect known issues and frequently asked features which are not integrated, yet.

DSI connector is pretty high on our priority list, but it's rather next month than next week.
I don't know if I get you right, but just to make it clear. You will get an image either via DSI or HDMI. I don't think it will be possible to have both activate at the same time.

Pandey

Hi @smieschek ,

I am eagerly waiting when Rasberry pi official display will also be supported for Pi4 . Wish would be if we can support both at same time .If not possible can the design be intelligent enough to check if Hdmi is available and switch to HDMI otherwise check if DSI is available and pick DSI .

Thanks and appreciate your hard work.

With regards,
Saurabh

crmann

I am also interested in the progress of the Pi4+touchscreen feature. I used the latest Beta for the Pi 4 with effectively the same results as the original post. The OS looks really promising so far...eager to put it to use.

bgers

Hi,

any news on this? Does the display already work with the actual release 11.2.0?

smieschek

Hi @Michael_ZPF , @Pandey , @crmann and @bgers
It was great effort, but I have good news. We have an implementation of the DSI connector on Android 11 for RPi4. Starting with nightly v11.2.20 the official 7" touchscreen, and possibly others, should work. Please give it a try, I'm very much looking forward to your feedback.

bgers

Hi @smieschek,

already installed it. Looks good at the moment.
Thank you!

Michael_ZPF

For the first test I only connected the 7” touch screen, but execution stopped (or at least there was no further feedback) after “Starting kernel ...”

Same result after reset. Test made on RB4 2GB.

Michael_ZPF

@Michael_ZPF said:
For the first test I only connected the 7” touch screen, but execution stopped (or at least there was no further feedback) after “Starting kernel ...”

Same result after reset. Test made on RB4 2GB.

V 11.2.21 resolves the problem.
The RB boots to the 7" touch screen and passes the Android config steps ...

smieschek

Thanks for the feedback and glad to hear that it works!

Pityuka

Hi,
Does Somebody knows If the Emteria.OS is somehow related to "old" RTAndroid? Asking because thinking about update from RPi3 + RTAndroid (7" Touchscreen) to RPi4 Emteria.OS (7" Touchscreen) - tryed few month ago but DSI was not working that time

IKS

@Pityuka, they are not related in terms of the codebase, but they relate through my person, who started both, RTAndroid project and the emteria company. But this is an off-topic here I think.

Edison

Hello, I have a question about the DSI display.
With a Raspberry 3B the original 7 "display works perfectly. With a Raspberry 4B the display jerks a lot. It doesn't run smoothly!
The following comment is displayed by the operating system:
"Serial console enabled. Performancs is impacted. To disable, check bootlader."
Where do I have to turn something off or where can I find it. I would be very grateful for a tip.

smieschek

Hi @Edison ,
You are right, the image through DSI is a little shaky at times. We are actively working on that, but unfortunately I don't have an ETA for an update in that regard.

To get rid of the notification you can remove the line "enable_uart=1" from the config.txt on the boot partition.

Ozi

Hi, where can I find the version 11.2.21 ? I have tryed the latest live version with rpi 4b and 7" dsi touch but after a rainbow i onlye get a black screen.

smieschek

Hi @Ozi ,
Please give the exact version you are using. With daily nightlies "the latest" version is too vague. But I'm also using 11.4.20 and official RPi touchscreen works. Do you have any other peripheral connected? Otherwise please provide UART log: https://emteria.com/kb/connect-uart-rpi

Purdbull

Hi, I am using a HQ Camera and a 7" touchscreen on my raspberry pi 4 model b with nightly 11.5.3 .The camera works connected via hdmi but when i try to connect the touchscreen, after the rainbow i get blackscreen and the green led is off. Is there some driver missing in the config.txt?

Purdbull

Hi again,
the touchscreen issue came from a power supplie not strong enogh. I now got the screen working but the touch does not. After startup, the first touch i do gets freezed, like if im not taking my finger off the screen.. please help me