Bt.2020 sdr

For some projector applications where the display can support a wider color gamut, it would be useful to have an option for BT.2020 SDR out ie. with the wide color gamut but with normal brightness dynamic range instead of HDR. Is this possible within the settings available today or with sysfs settings? The HDR to SDR setting is good but restricts the end device to standard color gamut only.