From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 82781] Option to disable mclk reclocking with AMD R9 280X
(TAHITI) to avoid screen flickering on VGA/CRT
Date: Tue, 19 Aug 2014 17:58:04 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=82781
--- Comment #10 from Christian Birchinger ---
I don't know why but the only way i can stop it from chaning mclk is doing
this:
si_dpm.c
/*
if ((rdev->pm.dpm.new_active_crtc_count > 1) ||
ni_dpm_vblank_too_short(rdev))
*/
disable_mclk_switching = true;
I know ni_dpm_vblank_too_short must report true because "450 <= 450".
I'm totaly clueless why only hardcoding "true" keeps mclk at max 160000
also any printk i add after this wont get printed out.
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