Update: Some receivers are not accepting 4:2:2 color depth with 10bit signal and since update 8.99.2 changed the HDMI driver to use 4:2:2 instead of 4:4:4, my receiver can’t show HDR content in 10bit. Most UHD content is in 4:2:0 which means that the standard color depth should be 4:2:0, which the devs are working on. The best way would be to change the color depth according to the content, however, that require much effort and since we are in the middle of a leap towards using a new kernel and graphic driver (Panfrost) to support the next version of Kodi, the easiest option to use 4:2:0 as default should be the one to go for 
Hi,
I’ve been using CoreELEC for the latest months and cd/cs have been working perfectly. However, after the latest update my receiver is saying the signal receiving is 8-bit when playing HDR10 content which Kodi says is 10-bit. I can also tell that the picture quality is more dim and not the same as when my receiver says the signal is 10-bit and the TV colours are brighter. Please let me know if there are any more information needed. The clips I’ve tested are remuxes and demonstration clips as:
LG Chess HDR
Sony 4K HDR Camp
LG New York HDR Ultra-HD
Sony BRAVIA OLED HDR
During playback:
CoreELEC:~/downloads # bash dispinfo2.sh
CoreELEC display information…------------ /etc/os-release ------------
NAME=“CoreELEC”
VERSION=“9.0-nightly_20190203”
ID=“coreelec”
VERSION_ID=“9.0”
PRETTY_NAME=“CoreELEC (official): 9.0-nightly_20190203”
HOME_URL=“https://coreelec.org”
BUG_REPORT_URL=“GitHub - CoreELEC/CoreELEC: A lightweight OS for KODI”
BUILD_ID=“954202406ee16901dc374f2e50a54b303ec43eeb”
COREELEC_ARCH=“S905.arm”
COREELEC_BUILD=“official”
COREELEC_PROJECT=“Amlogic”
BUILDER_NAME=“relkai”
BUILDER_VERSION=“9.0-nightly_20190203”
------------ /sys/devices/virtual/amhdmitx/amhdmitx0/edid ------------
Rx Brand Name: ONK
Rx Product Name: TX-NR747
Manufacture Week: 0
Manufacture Year: 2015
Physical size(cm): 133 x 75
EDID Version: 1.3
EDID block number: 0x1
blk0 chksum: 0xd1
Source Physical Address[a.b.c.d]: 4.1.0.0
YCC support 0x03, VIC (native 255):
ColorDeepSupport 0xb8 10/12/16/Y444 1/1/0/1
97 16 31 4 19 5 20 32 33 34 93 94 95 96 101 102 98 99 100 3 18 95 94 93 98 353 352 357 358
Audio {format, channel, freq, cce}
{1, 1, 0x7f, 0x07}
{1, 7, 0x7f, 0x07}
{2, 7, 0x07, 0x00}
{7, 7, 0x06, 0x00}
{9, 1, 0x02, 0x00}
{10, 7, 0x06, 0x01}
{11, 7, 0x7e, 0x03}
{11, 7, 0x7e, 0x01}
{12, 7, 0x7f, 0x01}
Speaker Allocation: 0x4f
Vendor: 0xc03
MaxTMDSClock1 300 MHz
Vendor2: 0xc45dd8
MaxTMDSClock2 600 MHz
ColorMetry: 0xc3
SCDC: 1
RR_Cap: 0
LTE_340M_Scramble: 0
HDR DeepColor
checkvalue: 0xd1150000
------------ /sys/devices/virtual/amhdmitx/amhdmitx0/edid_parsing ------------
ok
------------ /sys/devices/virtual/amhdmitx/amhdmitx0/rawedid ------------
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
------------ /sys/devices/virtual/amhdmitx/amhdmitx0/config ------------
cur_VIC: 97
VIC: 97 3840x2160p60hz
Colour depth: 10-bit
Colourspace: YUV422
Colour range: limited
EOTF: HDR10
YCC colour range: limited
PLL clock: 0xc000027b, Vid clock div 0x000a339c
audio config: on
3D config: off
------------ /sys/devices/virtual/amhdmitx/amhdmitx0/dc_cap ------------
420,10bit
420,8bit
444,10bit
444,8bit
422,10bit
422,8bit
rgb,10bit
rgb,8bit
------------ /sys/devices/virtual/amhdmitx/amhdmitx0/attr ------------------------ /sys/devices/virtual/amhdmitx/amhdmitx0/disp_cap ------------
480p60hz
576p50hz
720p60hz
1080i60hz
1080p60hz
720p50hz
1080i50hz
1080p30hz
1080p50hz
1080p25hz
1080p24hz
2160p30hz
2160p25hz
2160p24hz
smpte24hz
smpte25hz
smpte30hz
smpte50hz
smpte60hz
smpte50hz420
smpte60hz420
2160p50hz
2160p60hz
2160p50hz420
2160p60hz420
------------ /sys/devices/virtual/amhdmitx/amhdmitx0/preferred_mode ------------
2160p60hz
------------ /sys/devices/virtual/amhdmitx/amhdmitx0/hdr_cap ------------
Supported EOTF:
Traditional SDR: 1
Traditional HDR: 0
SMPTE ST 2084: 1
Future EOTF: 0
Supported SMD type1: 1
Luminance Data
Max: 0
Avg: 0
Min: 0
------------ /sys/class/display/vinfo ------------
current vinfo:
name: 2160p60hz
mode: 32
width: 3840
height: 2160
field_height: 2160
aspect_ratio_num: 16
aspect_ratio_den: 9
sync_duration_num: 2997
sync_duration_den: 50
screen_real_width: 1330
screen_real_height: 750
video_clk: 594000000
viu_color_fmt: 2hdr info:
hdr_support 0x00000005
lumi_max 0
lumi_avg 0
lumi_min 0
sink_flag hdmi outhdr master display info:
present_flag 0
features 0x0
primaries 0x0, 0x0
0x0, 0x0
0x0, 0x0
white_point 0x0, 0x0
luminance 0, 0------------ /storage/.kodi/userdata/disp_cap ------------ Unset by user!
------------ /storage/.config/autostart.sh ------------ Unset by user!
The clips I’m currently testing are from