Re: [PATCH] exynos: drm: use monotonic timestamps

2018-01-17 Thread Arnd Bergmann
On Fri, Nov 3, 2017 at 3:04 PM, Tobias Jakobi wrote: > Hello Arnd, > > I guess you could coordinate the IPP changes with Marek, who is rewriting the > IPP subsystem anyway (added Marek to Cc). > > Here is the most recent IPPv2 series: > https://www.spinics.net/lists/linux-samsung-soc/msg61066.html

Re: [PATCH] exynos: drm: use monotonic timestamps

2017-11-03 Thread Tobias Jakobi
Hello Arnd, I guess you could coordinate the IPP changes with Marek, who is rewriting the IPP subsystem anyway (added Marek to Cc). Here is the most recent IPPv2 series: https://www.spinics.net/lists/linux-samsung-soc/msg61066.html Concerning the G2D changes, I don't think anything in userspace

[PATCH] exynos: drm: use monotonic timestamps

2017-11-02 Thread Arnd Bergmann
The exynos DRM driver uses real-time 'struct timeval' values for exporting its timestamps to user space. This has multiple problems: 1. signed seconds overflow in y2038 2. the 'struct timeval' definition is deprecated in the kernel 3. time may jump or go backwards after a 'settimeofday()' syscall