[Bug 24462] r600: spread spectrum: flickering screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=24462

--- Comment #2 from Luca Tettamanti kronos.it@gmail.com 2010-12-08 20:27:11 --- (In reply to comment #1)

Created an attachment (id=39252)

--> (https://bugzilla.kernel.org/attachment.cgi?id=39252) [details]

possible fix

Does this patch help?

No, flickering it's still there. The parameters passed to EnableSpreadSpectrumOnPPLL with 2.6.36 and 2.6.37-rc5 are:

ss->percentage = 0x1e ss->type = 0x1 ss->step = 0x1 ss->delay = 0x2a ss->range = 0x2 pll_id = 0x0

but 2.6.36 uses ENABLE_SPREAD_SPECTRUM_ON_PPLL_PS_ALLOCATION, while the newer kernel uses ENABLE_LVDS_SS_PARAMETERS_V2 for the parameters (the only difference is that the latter does not have ucPpll); is this correct?