linux-toradex.git/drivers/gpu/drm/i915/intel_bios.c, branch v3.4.54

drm/i915: Check VBIOS value for determining LVDS dual channel mode, too

2013-01-17T16:51:07+00:00

commit b03543857fd75876b96e10d4320b775e95041bb7 upstream.

Currently i915 driver checks [PCH_]LVDS register bits to decide
whether to set up the dual-link or the single-link mode.  This relies
implicitly on that BIOS initializes the register properly at boot.
However, BIOS doesn't initialize it always.  When the machine is
booted with the closed lid, BIOS skips the LVDS reg initialization.
This ends up in blank output on a machine with a dual-link LVDS when
you open the lid after the boot.

This patch adds a workaround for that problem by checking the initial
LVDS register value in VBT.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=37742
Tested-By: Paulo Zanoni 
Reviewed-by: Rodrigo Vivi 
Reviewed-by: Adam Jackson 
Signed-off-by: Takashi Iwai 
Signed-off-by: Daniel Vetter 
Signed-off-by: Julien Cristau 
Signed-off-by: Greg Kroah-Hartman

drm/i915: do not default to 18 bpp for eDP if missing from VBT

2012-12-17T18:37:44+00:00

commit 9a30a61f3516871c5c638fd7c025fbaa11ddf7fe upstream.

commit 500a8cc466a24e2fbc4c86ef9c6467ae2ffdeb0c
Author: Zhenyu Wang 
Date:   Wed Jan 13 11:19:52 2010 +0800

    drm/i915: parse eDP panel color depth from VBT block

originally introduced parsing bpp for eDP from VBT, with a default of 18
bpp if the eDP BIOS data block is not present. Turns out that default seems
to break the Macbook Pro with retina display, as noted in

commit 4344b813f105a19f793f1fd93ad775b784648b95
Author: Daniel Vetter 
Date:   Fri Aug 10 11:10:20 2012 +0200

    drm/i915: ignore eDP bpc settings from vbt

Since we can't ignore bpc settings from VBT completely after all, get rid
of the default. Do not clamp eDP to 18 bpp by default if the eDP BDB is
missing from VBT.

Signed-off-by: Jani Nikula 
Tested-by: Henrik Rydberg 
[danvet: paste in the updated commit message from irc.]
Signed-off-by: Daniel Vetter 
Signed-off-by: Greg Kroah-Hartman

drm/i915: quirk away broken OpRegion VBT

2012-04-01T10:29:44+00:00

Somehow the BIOS manages to screw things up when copying the VBT
around, because the one we scrap from the VBIOS rom actually works.

Cc: stable@kernel.org
Tested-by: Markus Heinz 
Acked-by: Chris Wilson 
Reviewed-by: Rodrigo Vivi 
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=28812
Signed-Off-by: Daniel Vetter

drm/i915/bios: Downgrade the "signature missing" DRM_ERROR to debug

2012-02-27T10:32:10+00:00

As we warn the user later that we cannot find or load the VBIOS,
explaining why is an exercise in debugging. Shouting *ERROR* upsets
people and produces bug reports.

Reported-by: Michael Rieder 
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=43751
Signed-off-by: Chris Wilson 
Signed-off-by: Daniel Vetter

drm/i915: Use kcalloc instead of kzalloc to allocate array

2012-01-17T16:33:24+00:00

The advantage of kcalloc is, that will prevent integer overflows which could
result from the multiplication of number of elements and size and it is also
a bit nicer to read.

The semantic patch that makes this change is available
in https://lkml.org/lkml/2011/11/25/107

Signed-off-by: Thomas Meyer 
Signed-off-by: Daniel Vetter

drm/i915: Remove "i2c_speed" nonsense from child device table

2011-10-20T21:11:15+00:00

I have no evidence for this byte being used this way, and lots of
counterexamples.  Restore the struct to its empirical definition and
patch up gmbus setup to match.

Signed-off-by: Adam Jackson 
Acked-by: Chris Wilson 
Signed-off-by: Keith Packard

Merge branch 'fix-pch-refclk' into foo

2011-10-20T21:10:43+00:00

drv/i915: Pull display_clock_mode out of VBT table

2011-09-27T18:12:26+00:00

This tells the driver whether a CK505 clock source is available on
pre-PCH hardware. If so, it should be used as the non-SSC source,
leaving the internal clock for use as the SSC source.

Signed-off-by: Keith Packard 
Reviewed-by: Chris Wison

drm/i915: Use DRM_DEBUG_KMS for all messages in intel_bios.c

2011-09-27T18:12:10+00:00

These are all KMS related anyways, so don't hide them under other
debug levels.

Signed-off-by: Keith Packard 
Reviewed-by: Chris Wilson

drm/i915: broken copyright encoding in intel_bios.c

2011-09-27T05:29:38+00:00

Signed-off-by: Keith Packard