[Bug 52345] KMS Power Management have no effect

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=52345

--- Comment #11 from Grigori Goronzy <greg at chown.ath.cx> 2012-07-22 22:18:02 UTC ---
Not much, actually, the table looks very similar to AMD PALM / Radeon 6320 on
my netbook. The GPU part of Zacate and Llano is probably very similar, except
for clocks and number of shader cores. And that means you suffer from the same
issues.

IMHO the sanity check that limits the clock should be removed altogether, as it
doesn't make much sense. If you fancy recompiling the kernel, just comment this
out from radeon_pm.c:

189                 if (sclk > rdev->pm.default_sclk)
190                         sclk = rdev->pm.default_sclk;

This should get clock switching going.

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