Comment 38 for bug 1791312

Revision history for this message
In , Paul Dufresne (paulduf) wrote :

I am comparing PLL values for a not flickering kernel:
Linux version 3.14.79-031479-generic
and version 4.15 (recent one):

Linux 4.15:
Flickering values
[ 5.554557] [drm:radeon_compute_pll_avivo [radeon]] 122000 - 121980, pll dividers - fb: 253.0 ref: 8, post 7
[ 465.773119] [drm:radeon_compute_pll_avivo [radeon]] 122000 - 121980, pll dividers - fb: 253.0 ref: 8, post 7
[ 503.796178] [drm:radeon_compute_pll_avivo [radeon]] 122000 - 121980, pll dividers - fb: 253.0 ref: 8, post 7

Linux version 3.14.79-031479-generic: no flickering
[4.250932] [drm:radeon_compute_pll_avivo], 12201, pll dividers - fb: 189.8 ref: 6, post 7
[ 230.376566] [drm:radeon_compute_pll_avivo], 12201, pll dividers - fb: 189.8 ref: 6, post 7

122000 is about 10x 12201
I don't know what are these values, but it seems very different!