TV dimming with iPad OS using HDMI

[jazzybuilds]

When connecting ipad to TV using hdmi the screen dims when there is no input.

The only information i could find thats was related was a reddit post regarding another app where apple responded stating that it's likely due to screen sharing compatibility issue within the app.

Edit: Just to add this is on the iPad pro 2018 with the latest iPad OS 17.5 connecting to an Lg OLED C1. I'm not having this issue with delta emulator.

[anr2me]

May be related to this https://9to5mac.com/2023/01/04/ios-16-break-drm-content-hdmi/

It’s unclear what exactly has changed since Apple has never said anything about it. However, it seems that iOS 16 has a new version of DRM that is incompatible with old devices. For those unfamiliar, DRM or Digital Rights Management is a technology that protects digital media from being copied and distributed without permission.

Over time, DRM gets updates that improve the efficiency of the technology, but this also affects devices that no longer receive software updates (or in this case, the firmware of older HDMI adapters). Unfortunately, there’s no easy workaround available for affected users at this point. The good news is that those using a USB-C external display with the iPad can still watch DRM-restricted content – for now.

I wondered, does PPSSPP's screen even considered as DRM-reestricted-content?

[Florin9doi]

Probably related to setIdleTimerDisabled which is currently called only when an external controller is connected :

ppsspp/ios/ViewController.mm

Line 593 in dbcac0e

[[UIApplication sharedApplication] setIdleTimerDisabled:YES]; // prevent auto-lock

[hrydgard]

Oh, good catch, if that's it.

Hm, can we detect easily if an iPad is used like this? But, wouldn't it detect your touch input and prevent dimming anyway? I'm a bit unclear on iOS behavior here.

[Florin9doi]

I reproduce the dimming on a normal iPhone after 30 seconds of inactivity. On android the dimming is disabled all the time while ingame:

ppsspp/android/src/org/ppsspp/ppsspp/NativeActivity.java

Line 1636 in 4899347

if (params.equals("ingame")) {

[hrydgard]

Ah, good point. I guess I'll just switch the iOS code to the same behavior (I didn't write the current one...)