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Bug 4054

Summary: [patch] Raspberry Pi refresh rate detection
Product: SDL Reporter: Viacheslav Slavinsky <svofski>
Component: videoAssignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: don't know   
Hardware: ARM   
OS: Linux   
Attachments: Report correct refresh rate on Raspberry Pi

Description Viacheslav Slavinsky 2018-01-18 22:22:40 UTC 
Created attachment 3147 [details]
Report correct refresh rate on Raspberry Pi

SDL_rpivideo driver has 60 frames per second hardcoded in it, this is a problem for games that need to keep pace using VSYNC. I believe that I have found a solution to this. It is based on code in tvservice.c in rpi userland:

https://github.com/raspberrypi/userland/blob/a1b89e91f393c7134b4cdc36431f863bb3333163/host_applications/linux/apps/tvservice/tvservice.c#L433

Attached is a patch that reports display refresh rate on Raspberry Pi or falls back to report 60 if it can't. I do not know when it may fail though.
Comment 1 Sam Lantinga 2018-02-07 23:05:19 UTC 
Added, thanks!
https://hg.libsdl.org/SDL/rev/c7946b873fe8