drm/i915/bios: assume vbt is 4-byte aligned into oprom

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The unaligned ioread32() will make us read byte by byte looking for the
vbt. We could just as well have done a ioread8() + a shift and avoid the
extra confusion on how we are looking for "$VBT".

However when using ACPI it's guaranteed the VBT is 4-byte aligned
per spec, so we can probably assume it here as well.

v2: do not try to simplify the loop by eliminating the auxiliary counter
(Jani and Ville)

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191126225110.8127-4-lucas.demarchi@intel.com

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Lucas De Marchi 2019-11-26 14:51:10 -08:00

parent 2cded152ad

commit 98cf5c9a48

1 changed files with 1 additions and 1 deletions

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drivers/gpu/drm/i915/display/intel_bios.c

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