LibreELEC:~ # modetest -M rockchip -e

opened device `RockChip Soc DRM` on driver `rockchip` (version 1.0.0 at 0)

Encoders:

id      crtc    type    possible crtcs  possible clones

100     98      TMDS    0x00000001      0x00000001

105     0       TMDS    0x00000002      0x00000002


LibreELEC:~ # cat /sys/kernel/debug/dri/display-subsystem/state

plane[34]: Cluster0-win0

        crtc=video_port0

        fb=112

                allocated by = kodi.bin

                refcount=2

                format=AR24 little-endian (0x34325241)

                modifier=0x800000000000051

                size=1920x1080

                layers:

                        size[0]=1920x1080

                        pitch[0]=7680

                        offset[0]=0

                        obj[0]:

                                name=0

                                refcount=4

                                start=00000000

                                size=8556544

                                imported=no

        crtc-pos=1920x1080+0+0

        src-pos=1920.000000x1080.000000+0.000000+0.000000

        rotation=1

        normalized-zpos=0

        color-encoding=ITU-R BT.709 YCbCr

        color-range=YCbCr limited range

        color_mgmt_changed=0

        color-pipeline=0

plane[42]: Cluster1-win0

        crtc=(null)

        fb=0

        crtc-pos=0x0+0+0

        src-pos=0.000000x0.000000+0.000000+0.000000

        rotation=1

        normalized-zpos=5

        color-encoding=ITU-R BT.709 YCbCr

        color-range=YCbCr limited range

        color_mgmt_changed=0

        color-pipeline=0

plane[50]: Esmart0-win0

        crtc=(null)

        fb=0

        crtc-pos=0x0+0+0

        src-pos=0.000000x0.000000+0.000000+0.000000

        rotation=1

        normalized-zpos=0

        color-encoding=ITU-R BT.709 YCbCr

        color-range=YCbCr limited range

        color_mgmt_changed=0

        color-pipeline=0

plane[58]: Esmart1-win0

        crtc=(null)

        fb=0

        crtc-pos=0x0+0+0

        src-pos=0.000000x0.000000+0.000000+0.000000

        rotation=1

        normalized-zpos=1

        color-encoding=ITU-R BT.709 YCbCr

        color-range=YCbCr limited range

        color_mgmt_changed=0

        color-pipeline=0

plane[66]: Esmart2-win0

        crtc=(null)

        fb=0

        crtc-pos=0x0+0+0

        src-pos=0.000000x0.000000+0.000000+0.000000

        rotation=1

        normalized-zpos=2

        color-encoding=ITU-R BT.709 YCbCr

        color-range=YCbCr limited range

        color_mgmt_changed=0

        color-pipeline=0

plane[74]: Esmart3-win0

        crtc=(null)

        fb=0

        crtc-pos=0x0+0+0

        src-pos=0.000000x0.000000+0.000000+0.000000

        rotation=1

        normalized-zpos=3

        color-encoding=ITU-R BT.709 YCbCr

        color-range=YCbCr limited range

        color_mgmt_changed=0

        color-pipeline=0

plane[82]: Cluster2-win0

        crtc=(null)

        fb=0

        crtc-pos=0x0+0+0

        src-pos=0.000000x0.000000+0.000000+0.000000

        rotation=1

        normalized-zpos=6

        color-encoding=ITU-R BT.709 YCbCr

        color-range=YCbCr limited range

        color_mgmt_changed=0

        color-pipeline=0

plane[90]: Cluster3-win0

        crtc=(null)

        fb=0

        crtc-pos=0x0+0+0

        src-pos=0.000000x0.000000+0.000000+0.000000

        rotation=1

        normalized-zpos=7

        color-encoding=ITU-R BT.709 YCbCr

        color-range=YCbCr limited range

        color_mgmt_changed=0

        color-pipeline=0

crtc[98]: video_port0

        enable=1

        active=1

        self_refresh_active=0

        planes_changed=1

        mode_changed=0

        active_changed=0

        connectors_changed=0

        color_mgmt_changed=0

        plane_mask=1

        connector_mask=1

        encoder_mask=1

        mode: "1920x1080": 50 148500 1920 2448 2492 2640 1080 1084 1089 1125 0x4                                                                                                                                                                                                                                             8 0x5

        background_color=ffff000000000000

crtc[99]: video_port1

        enable=0

        active=0

        self_refresh_active=0

        planes_changed=0

        mode_changed=0

        active_changed=0

        connectors_changed=0

        color_mgmt_changed=0

        plane_mask=0

        connector_mask=0

        encoder_mask=0

        mode: "": 0 0 0 0 0 0 0 0 0 0 0x0 0x0

        background_color=ffff000000000000

connector[101]: HDMI-A-1

        crtc=video_port0

        self_refresh_aware=0

        interlace_allowed=0

        ycbcr_420_allowed=1

        max_requested_bpc=10

        colorspace=Default

        broadcast_rgb=Automatic

        is_limited_range=y

        output_bpc=10

        output_format=RGB

        tmds_char_rate=185625000

connector[106]: HDMI-A-2

        crtc=(null)

        self_refresh_aware=0

        interlace_allowed=0

        ycbcr_420_allowed=1

        max_requested_bpc=10

        colorspace=Default

        broadcast_rgb=Automatic

        is_limited_range=n

        output_bpc=0

        output_format=RGB

        tmds_char_rate=0