gpio used for HDMI hot plug detection is useless,
HDMI_STI register contains an hot plug detection status bit.
Fix binding documentation.
Signed-off-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>

Depending of the board configuration i2c for ddc could change,
this patch allow to use a phandle to specify which i2c controller to use.
Signed-off-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>

Add driver for HDMI output.
HDMI PHY registers are mixed into HDMI device registers
and their is only one IRQ for all this hardware block.
That is why PHYs aren't using phy framework but only a
thin hdmi_phy_ops structure with start and stop functions.

HDMI driver is mapped on drm_bridge and drm_connector structures.
Signed-off-by: NBenjamin Gaignard <benjamin.gaignard@linaro.org>
Reviewed-by: NRob Clark <robdclark@gmail.com>