From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 60858] [radeon HD 4570m] Error setting UVD clocks
Date: Mon, 09 Sep 2013 08:20:56 +0000 [thread overview]
Message-ID: <bug-60858-2300-BW19n6FlR7@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-60858-2300@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=60858
--- Comment #8 from Christian König <christian.koenig@amd.com> ---
You could dig into the code and try to figure out why the post dividers
(vclk_div and dclk_div) turn out as 0.
The two involved functions are rv770_set_uvd_clocks which can be found here
drivers/gpu/drm/radeon/rv770.c and radeon_uvd_calc_upll_dividers which can be
found here drivers/gpu/drm/radeon/radeon_uvd.c.
The most interesting value is rdev->clock.spll.reference_freq, it is the
reference clock frequency coming from a bios table. If that is wrong the whole
calculation doesn't work any more and the UPLL generates an invalid frequency.
Insert something like DRM_ERROR("Test %d\n", rdev->clock.spll.reference_freq)
into the code and see what it spits out on the next reboot.
Unfortunately I currently don't have much time to look into this and it seems
to still work fine with my RV710, so it must be something special with your
laptop.
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next prev parent reply other threads:[~2013-09-09 8:21 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-05 15:16 [Bug 60858] New: [radeon HD 4570m] Error setting UVD clocks bugzilla-daemon
2013-09-05 15:20 ` [Bug 60858] " bugzilla-daemon
2013-09-05 15:23 ` bugzilla-daemon
2013-09-05 15:24 ` bugzilla-daemon
2013-09-05 15:32 ` bugzilla-daemon
2013-09-05 15:43 ` bugzilla-daemon
2013-09-05 15:55 ` bugzilla-daemon
2013-09-09 6:47 ` bugzilla-daemon
2013-09-09 8:20 ` bugzilla-daemon [this message]
2013-09-09 19:43 ` bugzilla-daemon
2013-09-15 12:31 ` bugzilla-daemon
2013-09-16 3:36 ` bugzilla-daemon
2013-09-16 15:45 ` bugzilla-daemon
2013-09-16 15:46 ` bugzilla-daemon
2013-09-16 15:56 ` bugzilla-daemon
2013-09-16 16:26 ` bugzilla-daemon
2013-09-16 16:26 ` bugzilla-daemon
2013-10-01 11:43 ` bugzilla-daemon
2013-10-01 18:47 ` bugzilla-daemon
2014-01-09 8:06 ` bugzilla-daemon
2014-01-09 9:06 ` bugzilla-daemon
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