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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [bisected] kernel 3.7.0-rc1 breaks 6950 (CAYMAN)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=56139#c11">Comment # 11</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [bisected] kernel 3.7.0-rc1 breaks 6950 (CAYMAN)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=56139">bug 56139</a>
from <span class="vcard"><a class="email" href="mailto:alexandre.f.demers@gmail.com" title="Alexandre Demers <alexandre.f.demers@gmail.com>"> <span class="fn">Alexandre Demers</span></a>
</span></b>
<pre>Found what is wrong with the help of a few printk and by comparing to the code
being replaced. All the logic is good (going through crtc, disabling them,
waiting for vblank) BUT setting "tmp |=
EVERGREEN_CRTC_DISP_READ_REQUEST_DISABLE;" is wrong.
If I do as in the previous code by setting tmp = 0 and then continuing with:
radeon_wait_for_vblank(rdev, i);
WREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i], tmp);
everything works fine as before.
What is expected from "tmp |= EVERGREEN_CRTC_DISP_READ_REQUEST_DISABLE;"? From
what I read with printk, it is far from a 0 or a 1. Is this normal?</pre>
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