drm/edid: index CEA/HDMI mode tables using the VIC
Add a dummy entry to CEA/HDMI mode tables so they can be indexed directly using the VIC, avoiding a +1/-1 dance here and there. This adds clarity to the error checking for various functions that return the VIC on success and zero on failure; we can now explicitly check for 0 instead of just subtracting one from an unsigned type. Also add drm_valid_cea_vic() and drm_valid_hdmi_vic() helpers for checking valid VICs. v2: add drm_valid_cea_vic and drm_valid_hdmi_vic helpers (Ville) use { } instead of { 0 } for initializing the dummy modes Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Alex Deucher <alexander.deucher@amd.com> Signed-off-by:Jani Nikula <jani.nikula@intel.com> Reviewed-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1452252111-6439-1-git-send-email-jani.nikula@intel.comSigned-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch>
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