drm/i915: sync hdmi detection by hdmi identifier with 2D
Currently we detect HDMI monitor by hardware detection, but if an HDMI-DVI adapter is used to connect a DVI monitor, hardware detection will incorrectly take monitor as HDMI. HDMI spec says any device containing IEEE registration identifier will be treated as HDMI device. The patch intends to detect HDMI monitor by drm_detect_hdmi_monitor function which follows that rule. Signed-off-by: NMa Ling <ling.ma@intel.com> Signed-off-by: NEric Anholt <eric@anholt.net>
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