[Bug 72334] [BYT Regression]igt/drv_suspend/fence-restore-tiled2untiled fails
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Tue Dec 10 01:19:59 PST 2013
https://bugs.freedesktop.org/show_bug.cgi?id=72334
lu hua <huax.lu at intel.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEEDINFO |NEW
--- Comment #3 from lu hua <huax.lu at intel.com> ---
Bisect shows:f69e515699d8e9b1c25dcfe1c4c6f435087495d2 is the first bad commit
commit f69e515699d8e9b1c25dcfe1c4c6f435087495d2
Author: Duncan Laurie <dlaurie at chromium.org>
Date: Wed Nov 13 17:59:43 2013 -0800
i915: Use 120MHz LVDS SSC clock for gen5/gen6/gen7
We had been using a DMI table workaround to select the right
frequency for devices, but this is fragile and must be updated
with every new platform.
Instead the default case when VBT is missing is changed to use
120MHz clock for LVDS SSC for these generations.
The docs for 2010-Core, SandyBridge, and IvyBridge all indicate
that the reference frequency for LVDS is 120MHz:
"2010 Core"
http://intellinuxgraphics.org/IHD_OS_Vol3_Part3r2.pdf
page 38
Reference Frequency: 120MHz for CRT and LVDS. 100MHz for the FDI.
"2011 SandyBridge"
http://intellinuxgraphics.org/documentation/SNB/IHD_OS_Vol3_Part3.pdf
page 33
Reference Frequency: 120MHz for CRT, HDMI, LVDS. 100MHz for the FDI.
"2012 IvyBridge"
http://intellinuxgraphics.org/documentation/IVB/IHD_OS_Vol3_Part4.pdf
page 27
Reference Frequency: 120 MHz for CRT, HDMI, LVDS, 100MHz for the FDI.
Signed-off-by: Duncan Laurie <dlaurie at chromium.org>
[olof: Fixup for recent base, switched from if/else to single call]
Signed-off-by: Olof Johansson <olof at lixom.net>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
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