EDID Generation Crate

This crate is aimed at providing a typesafe abstraction to generate EDIDs.

TODO

General Features

• Edid 1.0 Support
• Edid 1.1 Support
• Edid 1.2 Support
• Edid 1.3 Support
  • Color Point Descriptor
  • Standard Timing Descriptor
• Edid 1.4 Support
  • Color Point Descriptor
  • Standard Timing Descriptor
  • Color Management Descriptor
  • CVT 3 byte Timing Codes

Specific Features

• Extensions
  • Video Timing Block Extension (VTB-EXT)
  • Display Information Extension (DI-EXT)
  • Localized String Extension (LS-EXT)
  • Digital Packet Video Link Extension (DPVL-EXT)
  • CEA-861 Series Timing Extensions

Type Safety

• Manufacturer Name

  • Mandatory
  • 3 Characters
  • ASCII Only
  • Upper Case Only

• Product Code

  • Mandatory
  • 2 bytes

• Serial Number

  • 4 bytes

• Date

  • Mandatory
  • Year is higher than or equal to 1990
  • EDID 1.3
    • Week is between 1 and 53
  • EDID 1.4
    • Week is between 1 and 54

• Basic Display Parameters and Features

  • Mandatory
  • Video Input Definition
    • Mandatory
      • Analog
        • Serrations on the vsync pulse are required when composite sync or sync on green
  • Display Size
    • Mandatory
    • 0x00, 0x00 is allowed for undefined size
  • Gamma
    • Mandatory
  • Feature Support
    • Mandatory
    • Bits 3 and 4 must be consistent with bit 7 at 0x14
    • SRGB
      • If set, the color information in the Chromaticity Coordinates must match
      • Signaled, but the Gamma isn't set to 2.2
      • Not signaled, but the Chromaticities match SRGB
    • EDID 1.4
      • Suspend is deprecated
      • Standby is deprecated
    • Preferred Timing
      • EDID 1.3
        • Required

• Display XY Chromaticity Coordinates

  • Mandatory

• Established Timings

  • Required if Plug & Play
  • 640x480@60Hz is required if Plug & Play

• Standard Timings

  • Horizontal Addressable Pixels is between 256 and 2288, in increment of 8 pixels
  • Field Refresh Rate is between 60 and 123Hz
  • Unused Timings mut be set to 0x01, 0x01

• Descriptors

  • Detailed Descriptors must be first and is preferred mode
  • EDID 1.3
    • Display Product Name is required
    • Display Range Limits is required
  • EDID 1.4
    • Display Range Limits is required if continuous frequency, recommended otherwise
    • Display Product Name is recommended
  • Detailed Timings
    • Display Size is set (in the base block), but Image size isn't
    • Display Size is smaller than the image size
    • Image Size is set but the Display Size isn't
    • Frequency is between 10 and 655,350kHz
    • Horizontal Addressable, Blanking and Vertical Addressable are between 0 and 4095 pixels
    • HFP and Hsync are between 0 and 1023 pixels
    • VFP, Vsync are between 0 and 63 lines
    • Hsync / vsync are between 0 and 4095 mm
    • Right / Left and Top / Bottom Borders are between 0 and 255 pixels / lines
    • Can be set to 0 if undefined
  • Display Range Limits
    • GTF
      • Minimum Horizontal Rate is higher that Maximum Horizontal Rate
      • Minimum Vertical Rate is higher than Maximum Vertical Rate
      • Default GTF
        • Byte 11 is set to 0x0a
        • Bytes 12-17 are set to 0x20
      • Secondary GTF
        • Byte 11 is set to 0x00
        • Start Frequency is less than the highest P/N Frequency
      • EDID 1.4
        • Vertical Rates between 1 and 510 Hz
        • Horizontal Rates between 1 and 510kHz
        • GTF is deprecated in favor of CVT
        • Video Timing Support
          • Descriptor required if bit 0 in 0x18 is set
          • Default GTF bit can be set only if bit 0 in 0x18 is set
          • Secondary GTF bit can be set only if bit 0 in 0x18 is set
          • CVT Supported bit can be set only if bit 0 in 0x18 is set
          • Range Limits Only can only bet set for EDID 1.4
          • CVT Supported can only bet set for EDID 1.4
  • Strings
    • Is not empty
    • Up to 13 chars
    • ASCII Only
    • End with 0x0a
    • Padded with 0x20
    • Types
      • Product Name Descriptor
      • Product Serial Descriptor
      • Alphanumeric Data String Descriptor