On 2/10/20 10:44 AM, Lennart Sorensen via talk wrote:
On Sat, Feb 08, 2020 at 01:07:35PM -0500, D. Hugh Redelmeier via talk wrote:
It seems that 7th gen and later Intel processors can support HDMI 2.0, but
only with an external "LSPCON" (Level Shifter and Protocol CONverter)
component on the motherboard.
See
<https://www.intel.com/content/dam/support/us/en/documents/graphics/HDR_Intel_Graphics_TechWhitePaper.pdf>
As I've mentioned before, going through DisplayPort also works and does
not require a LSPCON.
I love how it mentions future generations won't need it. Unfortunately
they mean future generations of the graphics core, not the CPU since
as far as I can find, the same problem applies to 8th and 9th gen CPUs
since the graphics core design hasn't changed.
I wonder if they will skip 2.0 and go to 2.1 when they finally get around
to updating that design.
If I recall HDMI 2.0 like USB 3.2 and PCI 4.0 does not require a hardware
upgrade. The protocol changed but older hardware should use it depending
on if it can handle the new requirements. This was one of the reasons
AMD did allow for awhile, PCI 4.0 on older Ryzen chipsets.
If HDMI for the last two versions is like this it really doesn't make sense
to not allow it on certain older computers. Probably just a way for Intel
to sell more chips maybe.
I could be mistaken but from memory this is what I recall,
Nick
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