AM5728: LCD configuration in device tree

Part Number: AM5728

Hi,

I am working on a custom carrier board with an am5728. We have a 24bpp LCD panel connected directly over DPI, for which I have tuned panel-timing parameters in the device tree as follows:

	display {
		status = "okay";
		pinctrl-names = "default";
		pinctrl-0 = <0x169 0x16a>;
		label = "lcd2";
		compatible = "ETM0700G0DH6", "panel-dpi";

		panel-timing {
			clock-frequency = <0x1fc1e20>;
			hactive = <0x320>;
			vactive = <0x1e0>;
			hfront-porch = <0xd2>;
			hback-porch = <0x1a>;
			hsync-len = <0x14>;
			vfront-porch = <0x16>;
			vback-porch = <0xd>;
			vsync-len = <0xa>;
			hsync-active = <0x0>;
			vsync-active = <0x0>;
			de-active = <0x1>;
			pixelclk-active = <0x1>;
		};

		port {

			endpoint {
				remote-endpoint = <0x16b>;
				linux,phandle = <0x146>;
				phandle = <0x146>;
			};
		};
	};

My question is where does one specify the BPP (bits per pixel) or BPC (bits per color) to the "panel-dpi" driver? How does the driver know whether I have attached a 18 BPP or 24 BPP LCD? I am finding that with this configuration, my LCD panel looks to have a reduced color depth in certain visual scenes.

Thanks,

Vishal