omapdrm: hdmi4: make low-level functions available
Three low-level functions in hdmi4.c and hdmi4_core.c are made available for use by the OMAP4 CEC support. Renamed the prefix to hdmi4 since these are OMAP4 specific. These function deal with the HDMI core and are needed to power it up for use with CEC, even when the HPD is low. Background: even if the HPD is low it should still be possible to use CEC. Some displays will set the HPD low when they go into standby or when they switch to another input, but CEC is still available and able to wake up/change input for such a display. This is explicitly allowed by the CEC standard. Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com> Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
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