Op 31-05-16 om 15:24 schreef Daniel Vetter:
On Tue, May 31, 2016 at 03:05:32PM +0200, Maarten Lankhorst wrote:
Op 30-03-16 om 11:51 schreef Daniel Vetter:
Code stolen from gma500.
It would be useful to mention why this is done. :)
But even with this patch it seems the legacy gamma in gamma_get is not very reliable. A failed call to gamma_set could leave wrong values in crtc->gamma_store either by calling the ioctl with lut.blue set to NULL, or call gamma_set and interrupt with a signal. For atomic color management get_gamma won't be accurate at all if mixed with new color management.
Hm, it's just some safety code I found laying around, and figured that looks like a good idea. You think it's worth it with some improved commit message added?
Might as well. It makes gamma_get ioctl slightly more reliable, but for reliable gamma should probably use crtc properties or atomic. :)