Add support for parsing VSDBs documented in Microsoft's "EDID extension for head-mounted and specialized monitors" [1]. [1] https://docs.microsoft.com/en-us/windows-hardware/drivers/display/specialized-monitors-edid-extension Signed-off-by: Philipp Zabel <philipp.zabel@xxxxxxxxx> --- parse-cta-block.cpp | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/parse-cta-block.cpp b/parse-cta-block.cpp index 075db46..e7ea01b 100644 --- a/parse-cta-block.cpp +++ b/parse-cta-block.cpp @@ -1067,6 +1067,43 @@ static void cta_amd(const unsigned char *x, unsigned length) } } +static std::string display_use_case(unsigned char x) +{ + switch (x) { + case 1: return "Test equipment"; + case 2: return "Generic display"; + case 3: return "Television display"; + case 4: return "Desktop productivity display"; + case 5: return "Desktop gaming display"; + case 6: return "Presentation display"; + case 7: return "Virtual reality headset"; + case 8: return "Augmented reality"; + case 16: return "Video wall display"; + case 17: return "Medical imaging display"; + case 18: return "Dedicated gaming display"; + case 19: return "Dedicated video monitor display"; + case 20: return "Accessory display"; + default: break; + } + fail("Unknown Display product primary use case 0x%02x.\n", x); + return std::string("Unknown display use case (") + utohex(x) + ")"; +} + +static void cta_microsoft(const unsigned char *x, unsigned length) +{ + // This VSDB is documented at: + // https://docs.microsoft.com/en-us/windows-hardware/drivers/display/specialized-monitors-edid-extension + printf(" Version: %u\n", x[0]); + if (x[0] > 2) { + // In version 1 and 2 these bits should always be set to 0. + printf(" Desktop Usage: %u\n", (x[1] >> 6) & 1); + printf(" Third-Party Usage: %u\n", (x[1] >> 5) & 1); + } + printf(" Display Product Primary Use Case: %u (%s)\n", x[1] & 0x1f, + display_use_case(x[1] & 0x1f).c_str()); + hex_block(" Container ID: ", x + 2, length - 2, false, 16); +} + static void cta_hdr10plus(const unsigned char *x, unsigned length) { printf(" Application Version: %u", x[0]); @@ -2172,6 +2209,10 @@ void edid_state::cta_block(const unsigned char *x, bool duplicate) cta_amd(x + 4, length - 3); break; } + if (oui == 0xca125c && length == 0x15) { + cta_microsoft(x + 4, length - 3); + break; + } hex_block(" ", x + 4, length - 3); break; case 0x04: -- 2.30.2
