[Bug 63101] Hard lockup whel launching games like TF2 on kernels 3.11.5 and 3.12 rc4 and above if radeon.dpm=1 is used

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https://bugzilla.kernel.org/show_bug.cgi?id=63101

--- Comment #18 from Kertesz Laszlo <laszlo.kertesz@gmail.com> ---
Tested with 3.12.0-next-20131111, started the computer and launched Steam and
TF2 right away.

Activating enable_nbps_policy to enable_gfx_clock_gating worked well.

The enable_mg_clock_gating, enable_gfx_dynamic_mgpg, override_dynamic_mgpg
options
gave gpu lockups and softresets (same as the above attachment), mostly after i
entered the map, but sometimes after the reset the game was resumed and could
play without issues.
Combining them with uvd_dpm seems to be the killer factor though.

This is what seems to work well so far (uvd_dpm seems to not create problems if
the mgpg and mg options are disabled:

pi->enable_bapm = false;
    pi->enable_nbps_policy = true; /*mychange*/
    pi->enable_sclk_ds = true;
    pi->enable_gfx_power_gating = true;
    pi->enable_gfx_clock_gating = true;
    pi->enable_mg_clock_gating = false;
    pi->enable_gfx_dynamic_mgpg = false; /* ??? */
    pi->override_dynamic_mgpg = false;
    pi->enable_auto_thermal_throttling = true;
    pi->voltage_drop_in_dce = false; /* need to restructure dpm/modeset
interaction */
    pi->uvd_dpm = true; /* ??? */

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