The 'de-active' and 'pixelclk-active' DT properties are evaluated by of_parse_display_timing() called from of_get_drm_display_mode(), but later lost in the conversion from videomode.flags to drm_display_mode.flags. Use an open coded version of of_get_drm_display_mode() to get access to these flags and make sure they are passed on to the ipu-di driver. This patch also makes sure, that the 'bus_flags' specified in the simple-panel driver will be passed on from the ipu-di driver.
The first patch in this series makes sure, the imx-ldb driver honors the 'native-mode' property in DT (like the parallel-display driver does already).
The third patch removes some dead code in the parallel-display driver, hat depends on a variable which is never assigned a non-zero value and thus can never be reached.