[WHL] only one mode available

Submitted by Timo Aaltonen

Assigned to Intel GFX Bugs mailing list

Link to original bug (#110908)

Description

filing here per request

a laptop with a weird EDID can only show 1920x1080 resolution, but other modes work fine on Win10, apparently.

Extracted contents:
header: 00 ff ff ff ff ff ff 00
serial number: 06 af 2d 21 00 00 00 00 01 1d
version: 01 04
basic params: 95 1d 11 78 03
chroma info: 30 e5 a5 56 53 9d 27 0c 50 54
established: 00 00 00
standard: 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
descriptor 1: 14 37 80 b8 70 38 24 40 10 10 3e 00 25 a5 10 00 00 1a
descriptor 2: 10 2c 80 b8 70 38 24 40 10 10 3e 00 25 a5 10 00 00 1a
descriptor 3: 00 00 00 fe 00 48 48 59 43 59 80 42 31 33 33 48 41 4b
descriptor 4: 00 00 00 00 00 01 41 21 9e 00 10 00 00 0a 01 0a 20 20
extensions: 00
checksum: f2

EDID version: 1.4
Manufacturer: AUO Model 212d Serial Number 0
Made in week 1 of 2019
Digital display
6 bits per primary color channel
DisplayPort interface
Maximum image size: 29 cm x 17 cm
Gamma: 2.20
Supported color formats: RGB 4:4:4
First detailed timing includes the native pixel format and preferred refresh rate
Display is continuous frequency
Display x,y Chromaticity:
Red: 0.6445, 0.3388
Green: 0.3242, 0.6132
Blue: 0.1552, 0.0488
White: 0.3134, 0.3291
Established timings supported:
Standard timings supported:
Detailed mode: Clock 141.000 MHz, 293 mm x 165 mm
1920 1936 1952 2104 hborder 0
1080 1083 1097 1116 vborder 0
+hsync -vsync
VertFreq: 60 Hz, HorFreq: 67015 Hz
Detailed mode: Clock 112.800 MHz, 293 mm x 165 mm
1920 1936 1952 2104 hborder 0
1080 1083 1097 1116 vborder 0
+hsync -vsync
VertFreq: 48 Hz, HorFreq: 53612 Hz
ASCII string: HHYCY
Manufacturer-specified data, tag 0
Checksum: 0xf2 (valid)

Unknown extension block

EDID block does NOT conform to EDID 1.4!
Missing name descriptor
Missing monitor ranges
Detailed block string not properly terminated
EDID block does not conform at all!
Has 101 nonconformant extension block(s)
Invalid ASCII string