Module drm 

Get information about video

Example

use ferrix_lib::drm::Video;
use ferrix_lib::traits::ToJson;

let video = Video::new().unwrap();
for dev in &video.devices {
    dbg!(dev);
}
let json = video.to_json().unwrap();
dbg!(json);

EDID structure, version 1.4

From WikiPedia

Bytes	Description
0-7	Fixed header pattern 00 FF FF FF FF FF FF 00
8-9	Manufacturer ID. “IBM”, “PHL”
10-11	Manufacturer product code. 16-bit hex number, little endian. “PHL” + “C0CF”
12-15	Serial number. 32 bits, little-endian
16	Week of manufacture; or FF model year flag
17	Year of manufacture, or year or model, if model year flag is set. Year = datavalue + 1990
18	EDID version, usually 01 (for 1.3 and 1.4)
19	EDID revision, usually 03 (for 1.3) or 04 (for 1.4)
20	Video input parameters bitmap
21	Horizontal screen size, in cm (range 1-255). If vertical screen size is 0, landscape aspect ratio (range 1.00-3.54), datavalue = (ARx100) - 99 (example: 16:9, 79; 4:3, 34.)
22	Vertical screen size, in cm
23	Display gamma, factory default (range 1.00 - 3.54), datavalue = (gamma x 100) - 100 = (gamma - 1) x 100. If 255, gamma is defined by DI-EXT block
24	Supported features bitmap
…	…

EDID Detailed Timing Descriptor (TODO)

Bytes	Description
0-1	Pixel clock. 00 - reserved; otherwise in 10 kHz units (0.01 - 655.35 MHz, little-endian)
2	Horizontal active pixels 8 lsbits (0-255)
3	Horizontal blanking pixels 8 lsbits (0-255)
4	…
5	Vertical active lines 8 lsbits (0-255)
6	Vertical blanking lines 8 lsbits (0-255)
7	…
8	Horizontal front porch (sync offset) pixels 8 lsbits (0-255) from blanking start
9	Horizontal sync pulse width pixels 8 lsbits (0-255)
10	…
11	…
12	Horizontal image size, mm, 8 lsbits (0-255 mm, 161 in)
13	Vertical image size, mm, …
…	…

Structs

DRM

Information about selected display

EDID

Information from edid file (EDID v1.4 only supported yet)

Video

Information about video devices

VideoInputParamsAnalog

VideoInputParamsDigital

Digital input

Enums

BitDepth

Bit depth

VideoInputParams

Video input parameters bitmap

VideoInterface

Video interface (EDID data may be incorrect)