drm/i915: abstract i2c bit banging fallback in gmbus xfer

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Choose between i2c bit banging and gmbus in a new higher level function,
and let the i2c core retry the first time we fall back to bit banging.

The i2c core imposes a timeout on -EAGAIN, but it defaults to 1 second,
and shouldn't be a problem for us.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1448980166-23055-2-git-send-email-jani.nikula@intel.com

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Jani Nikula 2015-12-01 16:29:26 +02:00

parent 0aeb904888

commit bffce907d6

1 changed files with 25 additions and 14 deletions

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drivers/gpu/drm/i915/intel_i2c.c

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