How to find if a system with 7th Gen Intel® Core™ Processor and newer platforms can work with HDR.
Using Intel® HD Graphics 620, the HDR seems not to be working.
Information is located on the Intel® Core™ i7-7500U Processor Technical product specification.
It is necessary to check if the motherboard or laptop met the requirements, since the High Dynamic Range (HDR) technology is embedded on the integrated graphics controller (iGPU).
Section: 2.3.8 High-bandwidth Digital Content Protection (HDCP)
HDCP is the technology for protecting high-definition content against unauthorized copy or unreceptive between a source (computer, digital set top boxes, and so on) and the sink (panels, monitor, and TVs). The processor supports HDCP 2.2 for 4k Premium content protection over wired displays (HDMI*, DVI, and DisplayPort*).
The HDCP 2.2 keys are integrated into the processor and customers are not required to physically configure or handle the keys. HDCP2.2 for HDMI2.0 is covered by the LSPCON platform device.
Some minor difference will be between Integrated HDCP2.2 over HDMI1.4 compared to the HDCP2.2 over LSPCON in HDMI1.4 Mode. Also, LSPCON is needed for HDMI 2.0a which defines HDR over HDMI.
The HDCP 1.4 keys are integrated into the processor and customers are not required to physically configure or handle the keys.
Table 2-24. HDCP Display supported Implications Table
|HDCP1.4||4K@60||No||iHDCP||10 bit||Legacy Integrated for HDCP1.4|
|HDCP2.2||4K@60||Yes||iHDCP||10 bit||New Integrated for HDCP2.2|
|HDCP1.4||4K@30||No||iHDCP||8 bit||Legacy Integrated for HDCP1.4|
|HDCP2.2||4K@30||No||LSPCON||8 bit||LSPCON HDCP2.2 required|
|HDCP2.2||4K@30||No||iHDCP4||8 bit||New Integrated for HDCP2.2|
|HDMI 2.0||HDCP2.2||4K@60||No||LSPCON||12 bit (YUV 420)||LSPCON HDCP2.2 required|
|HDMI2.0a||HDCP2.2||4K@60||Yes||LSPCON||12 bit (YUV 420)||LSPCON HDCP2.2 required|
Here is an article that you may find helpful: High Dynamic Range (HDR) Support.