drm/bridge: imx: add driver for HDMI TX Parallel Video Interface

drm/bridge: imx: add driver for HDMI TX Parallel Video Interface

This IP block is found in the HDMI subsystem of the i.MX8MP SoC. It has a
full timing generator and can switch between different video sources. On
the i.MX8MP however the only supported source is the LCDIF. The block
just needs to be powered up and told about the polarity of the video
sync signals to act in bypass mode.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Marek Vasut <marex@denx.de>
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Richard Leitner <richard.leitner@skidata.com>
Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Adam Ford <aford173@gmail.com>
Link: https://lore.kernel.org/r/20240203165307.7806-9-aford173@gmail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240203165307.7806-9-aford173@gmail.com