软件上电默认是模式2 (720x480P)，在HDMI显示器可以看到小企鹅，填充/dev/fb0内容可以看到变化

但是接到HDMI液晶屏上，屏可以点亮，但是只是呈现一片白色，填充/dev/fb0无变化
可能是参数的问题，分别读出EDID和解码如下：

HDMI显示器EDID

edid-decode (hex):

00 ff ff ff ff ff ff 00 58 d6 32 bc 01 01 01 01
09 1a 01 03 80 22 13 78 3e ee 91 a3 54 4c 99 26
0f 50 54 01 08 00 d1 c0 01 01 01 01 01 01 01 01
81 80 01 01 81 c0 02 3a 80 18 71 38 2d 40 58 2c
25 00 58 c1 10 00 00 1e 00 00 00 fc 00 56 46 56
0a 20 20 20 20 20 20 20 20 20 00 00 00 ff 00 64
65 6d 6f 73 65 74 2d 31 0a 20 30 20 00 00 00 fd
00 32 4b 54 54 13 01 0a 20 20 20 20 20 20 01 7f

02 03 24 f2 41 04 e2 00 d5 e3 05 c0 00 23 09 7f
07 83 01 00 00 67 03 0c 00 10 00 38 3c e6 06 05
01 62 62 00 02 3a 80 18 71 38 2d 40 58 2c 25 00
55 50 21 00 00 1e 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e4

Block 0, Base EDID:
EDID Structure Version & Revision: 1.3
Vendor & Product Identification:
Manufacturer: VFV
Model: 48178
Serial Number: 16843009
Made in: week 9 of 2016
Basic Display Parameters & Features:
Digital display
Maximum image size: 34 cm x 19 cm
Gamma: 2.20
DPMS levels: Off
Undefined display color type
Default (sRGB) color space is primary color space
First detailed timing is the preferred timing
Color Characteristics:
Red : 0.6396, 0.3300
Green: 0.2998, 0.5996
Blue : 0.1503, 0.0595
White: 0.3125, 0.3291
Established Timings I & II:
DMT 0x09: 800x600 60.316541 Hz 4:3 37.879 kHz 40.000000 MHz
DMT 0x10: 1024x768 60.003840 Hz 4:3 48.363 kHz 65.000000 MHz
Standard Timings:
DMT 0x52: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz
DMT 0x23: 1280x1024 60.019740 Hz 5:4 63.981 kHz 108.000000 MHz
DMT 0x55: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz
Detailed Timing Descriptors:
DTD 1: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (344 mm x 193 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 2 Vsync 5 Vback 38 Vpol P
Display Product Name: 'VFV'
Display Product Serial Number: 'demoset-1'
Display Range Limits:
Monitor ranges (Bare Limits): 50-75 Hz V, 84-84 kHz H, max dotclock 190 MHz
Extension blocks: 1
Checksum: 0x7f

Block 1, CTA-861 Extension Block:
Revision: 3
Underscans IT Video Formats by default
Basic audio support
Supports YCbCr 4:4:4
Supports YCbCr 4:2:2
Native detailed modes: 2
Video Data Block:
VIC 4: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz
Video Capability Data Block:
YCbCr quantization: Selectable (via AVI YQ)
RGB quantization: Selectable (via AVI Q)
PT scan behavior: Always Overscanned
IT scan behavior: Always Overscanned
CE scan behavior: Always Overscanned
Colorimetry Data Block:
BT2020YCC
BT2020RGB
Audio Data Block:
Linear PCM:
Max channels: 2
Supported sample rates (kHz): 192 176.4 96 88.2 48 44.1 32
Supported sample sizes (bits): 24 20 16
Speaker Allocation Data Block:
FL/FR - Front Left/Right
Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
Source physical address: 1.0.0.0
DC_36bit
DC_30bit
DC_Y444
Maximum TMDS clock: 300 MHz
HDR Static Metadata Data Block:
Electro optical transfer functions:
Traditional gamma - SDR luminance range
SMPTE ST2084
Supported static metadata descriptors:
Static metadata type 1
Desired content max luminance: 98 (417.710 cd/m^2)
Desired content max frame-average luminance: 98 (417.710 cd/m^2)
Desired content min luminance: 0 (0.000 cd/m^2)
Detailed Timing Descriptors:
DTD 2: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (597 mm x 336 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 2 Vsync 5 Vback 38 Vpol P
Checksum: 0xe4 Unused space in Extension Block: 73 bytes

Preferred Video Timing if only Block 0 is parsed:
DTD 1: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (344 mm x 193 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 2 Vsync 5 Vback 38 Vpol P

Preferred Video Timings if Block 0 and CTA-861 Blocks are parsed:
DTD 1: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (344 mm x 193 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 2 Vsync 5 Vback 38 Vpol P
VIC 4: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz
Hfront 110 Hsync 40 Hback 220 Hpol P
Vfront 5 Vsync 5 Vback 20 Vpol P

Native Video Resolution:
1920x1080

edid-decode SHA: 2d44e1b01c7e 2023-03-11 18:21:51

Warnings:

Block 0, Base EDID:
Detailed Timing Descriptor #1: DTD is similar but not identical to VIC 16.
Block 1, CTA-861 Extension Block:
Video Capability Data Block: IT scan behavior is expected to support underscanned.
Video Capability Data Block: S_PT is equal to S_IT and S_CE, so should be set to 0 instead.
Detailed Timing Descriptor #2: DTD is similar but not identical to VIC 16.
Display Product Serial Number is set, so the Serial Number in the Base EDID should be 0.
EDID:
CTA-861: Multiple native progressive timings are defined.

Failures:

Block 0, Base EDID:
Display Range Limits: 'Bare Limits' is not allowed for EDID < 1.4.
Block 1, CTA-861 Extension Block:
Video Capability Data Block: IT video formats are always overscanned, but bit 7 of Byte 3 of the CTA-861 Extension header is set to underscanned.
Detailed Timing Descriptor #2: Mismatch of image size 597x336 mm vs display size 340x190 mm.
Required 640x480p60 timings are missing in the established timings and the SVD list (VIC 1).
EDID:
Base EDID: Some timings are out of range of the Monitor Ranges:
Horizontal Freq: 37.878 - 67.500 kHz (Monitor: 84.000 - 84.000 kHz)
Base EDID: The DTD max image size is 597x336mm, which is larger than the display size 340.0x190.0mm.

EDID conformity: FAIL

HDMI液晶屏 EDID

edid-decode (hex):

00 ff ff ff ff ff ff 00 04 81 04 00 01 00 00 00
01 11 01 03 80 0f 0a 00 0a 00 00 00 00 00 00 00
00 00 00 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 80 0c 20 80 30 e0 2d 10 28 30
d3 00 6c 44 00 00 00 18 00 00 00 10 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 10 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 17

Block 0, Base EDID:
EDID Structure Version & Revision: 1.3
Vendor & Product Identification:
Manufacturer: ADA
Model: 4
Serial Number: 1
Made in: week 1 of 2007
Basic Display Parameters & Features:
Digital display
Maximum image size: 15 cm x 10 cm
Gamma: 1.00
RGB color display
First detailed timing is the preferred timing
Color Characteristics:
Red : 0.0000, 0.0000
Green: 0.0000, 0.0000
Blue : 0.0000, 0.0000
White: 0.0000, 0.0000
Established Timings I & II: none
Standard Timings: none
Detailed Timing Descriptors:
DTD 1: 800x480 65.681445 Hz 5:3 34.483 kHz 32.000000 MHz (108 mm x 68 mm)
Hfront 40 Hsync 48 Hback 40 Hpol N
Vfront 13 Vsync 3 Vback 29 Vpol N
Dummy Descriptor:
Dummy Descriptor:
Dummy Descriptor:
Checksum: 0x17

Preferred Video Timing if only Block 0 is parsed:
DTD 1: 800x480 65.681445 Hz 5:3 34.483 kHz 32.000000 MHz (108 mm x 68 mm)
Hfront 40 Hsync 48 Hback 40 Hpol N
Vfront 13 Vsync 3 Vback 29 Vpol N

Native Video Resolution:
800x480

edid-decode SHA: 2d44e1b01c7e 2023-03-11 18:21:51

Failures:

Block 0, Base EDID:
Detailed Timing Descriptor #1: Mismatch of image size 108x68 mm vs display size 150x100 mm.
Missing Display Product Name.
Missing Display Range Limits Descriptor.

EDID conformity: FAIL

哪位大侠熟悉EDID参数，能够指点一下，可以调整哪些参数使得能够适应这个液晶屏， 谢谢了。

cd /sys/kernel/debug/dispdbg
echo disp0 > name
echo switch1 > command
echo 4 5 0 0 0x4 0x101 0 0 0 8 > param
echo 1 > start