drm/i915: fix gpio register detection logic for BIOS without VBT

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if no VBT is present, crt_ddc_bus will be left at 0, and cause us
to use that for the GPIO register offset. That's never a valid register
offset, so let the "undefined" value be 0 instead of -1.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
[anholt: clarified the commit message a bit]

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Shaohua Li 2009-11-18 15:15:02 +08:00 • committed by Eric Anholt

parent d271817bae

commit 29874f44fb

3 changed files with 2 additions and 6 deletions

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2

drivers/gpu/drm/i915/i915_drv.h

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4

drivers/gpu/drm/i915/intel_bios.c

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2

drivers/gpu/drm/i915/intel_crt.c

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