Re: [PATCH] drm, drm/i915/lvds: Honour video= parameter to override LVDS fixed mode

Steven Newbury
2011-03-29T10:50:42Z

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----- Original message -----
> On Mon, 28 Mar 2011 22:46:55 +0100, Steven Newbury
> <steve@snewbury.org.uk> wrote:
> > Hi Chris, have you updated this patch? I have an Intel D525 (Pineview)
> > system with HDMI port connected through an LVDS converter.  The "panel
> > timings" are the HDMI output mode, and it gets set through a BIOS
> > option making it impossible to use the native resolution on the HDTV
> > display.
>
> Can you please attach the EDID for the connection and let's see if there
> is any tell-tale?

Unfortunately EDID doesn't seem to be making it through. /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/edid is empty so I tried read-edid, but it reported "Monitor and video card combination does not support DDC1/2 transfers". EDID was present using VGA-DVI so the TV does support EDID. (Although it didn't actually support the modes it claimed to when it determined it was connected to a PC!)

I've attached dmidecode output in case it helps.

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# dmidecode 2.11
SMBIOS 2.6 present.
22 structures occupying 1254 bytes.
Table at 0x000FB9F0.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
Vendor: American Megatrends Inc.
Version: 080016
Release Date: 12/01/2010
Address: 0xF0000
Runtime Size: 64 kB
ROM Size: 1024 kB
Characteristics:
ISA is supported
PCI is supported
PNP is supported
BIOS is upgradeable
BIOS shadowing is allowed
ESCD support is available
Boot from CD is supported
Selectable boot is supported
BIOS ROM is socketed
EDD is supported
5.25"/1.2 MB floppy services are supported (int 13h)
3.5"/720 kB floppy services are supported (int 13h)
3.5"/2.88 MB floppy services are supported (int 13h)
Print screen service is supported (int 5h)
8042 keyboard services are supported (int 9h)
Serial services are supported (int 14h)
Printer services are supported (int 17h)
CGA/mono video services are supported (int 10h)
ACPI is supported
USB legacy is supported
LS-120 boot is supported
ATAPI Zip drive boot is supported
BIOS boot specification is supported
Targeted content distribution is supported
BIOS Revision: 8.16

Handle 0x0001, DMI type 1, 27 bytes
System Information
Manufacturer: To Be Filled By O.E.M.
Product Name: To Be Filled By O.E.M.
Version: To Be Filled By O.E.M.
Serial Number: To Be Filled By O.E.M.
UUID: 03000200-0400-0500-0006-000700080009
Wake-up Type: Power Switch
SKU Number: To Be Filled By O.E.M.
Family: To Be Filled By O.E.M.

Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
Manufacturer: To be filled by O.E.M.
Product Name: To be filled by O.E.M.
Version: To be filled by O.E.M.
Serial Number: To be filled by O.E.M.
Asset Tag: To Be Filled By O.E.M.
Features:
Board is a hosting board
Board is replaceable
Location In Chassis: To Be Filled By O.E.M.
Chassis Handle: 0x0003
Type: Motherboard
Contained Object Handles: 0

Handle 0x0003, DMI type 3, 21 bytes
Chassis Information
Manufacturer: To Be Filled By O.E.M.
Type: Desktop
Lock: Not Present
Version: To Be Filled By O.E.M.
Serial Number: To Be Filled By O.E.M.
Asset Tag: To Be Filled By O.E.M.
Boot-up State: Safe
Power Supply State: Safe
Thermal State: Safe
Security Status: None
OEM Information: 0x00000000
Height: Unspecified
Number Of Power Cords: 1
Contained Elements: 0

Handle 0x0004, DMI type 4, 42 bytes
Processor Information
Socket Designation: CPU 1
Type: Central Processor
Family: Atom
Manufacturer: Intel
ID: CA 06 01 00 FF FB EB BF
Signature: Type 0, Family 6, Model 28, Stepping 10
Flags:
FPU (Floating-point unit on-chip)
VME (Virtual mode extension)
DE (Debugging extension)
PSE (Page size extension)
TSC (Time stamp counter)
MSR (Model specific registers)
PAE (Physical address extension)
MCE (Machine check exception)
CX8 (CMPXCHG8 instruction supported)
APIC (On-chip APIC hardware supported)
SEP (Fast system call)
MTRR (Memory type range registers)
PGE (Page global enable)
MCA (Machine check architecture)
CMOV (Conditional move instruction supported)
PAT (Page attribute table)
PSE-36 (36-bit page size extension)
CLFSH (CLFLUSH instruction supported)
DS (Debug store)
ACPI (ACPI supported)
MMX (MMX technology supported)
FXSR (FXSAVE and FXSTOR instructions supported)
SSE (Streaming SIMD extensions)
SSE2 (Streaming SIMD extensions 2)
SS (Self-snoop)
HTT (Multi-threading)
TM (Thermal monitor supported)
PBE (Pending break enabled)
Version: Intel(R) Atom(TM) CPU D525 @ 1.80GHz
Voltage: 1.0 V
External Clock: 200 MHz
Max Speed: 1800 MHz
Current Speed: 1800 MHz
Status: Populated, Enabled
Upgrade: Socket LGA775
L1 Cache Handle: 0x0005
L2 Cache Handle: 0x0006
L3 Cache Handle: Not Provided
Serial Number: To Be Filled By O.E.M.
Asset Tag: To Be Filled By O.E.M.
Part Number: To Be Filled By O.E.M.
Core Count: 2
Core Enabled: 2
Thread Count: 4
Characteristics:
64-bit capable

Handle 0x0005, DMI type 7, 19 bytes
Cache Information
Socket Designation: L1-Cache
Configuration: Enabled, Not Socketed, Level 1
Operational Mode: Write Back
Location: Internal
Installed Size: 48 kB
Maximum Size: 48 kB
Supported SRAM Types:
Other
Installed SRAM Type: Other
Speed: Unknown
Error Correction Type: Parity
System Type: Data
Associativity: Other

Handle 0x0006, DMI type 7, 19 bytes
Cache Information
Socket Designation: L2-Cache
Configuration: Enabled, Not Socketed, Level 2
Operational Mode: Write Back
Location: Internal
Installed Size: 1024 kB
Maximum Size: 1024 kB
Supported SRAM Types:
Other
Installed SRAM Type: Other
Speed: Unknown
Error Correction Type: Single-bit ECC
System Type: Unified
Associativity: 8-way Set-associative

Handle 0x0007, DMI type 5, 20 bytes
Memory Controller Information
Error Detecting Method: 64-bit ECC
Error Correcting Capabilities:
None
Supported Interleave: One-way Interleave
Current Interleave: One-way Interleave
Maximum Memory Module Size: 4096 MB
Maximum Total Memory Size: 8192 MB
Supported Speeds:
Other
Supported Memory Types:
DIMM
SDRAM
Memory Module Voltage: 3.3 V
Associated Memory Slots: 2
0x0008
0x0009
Enabled Error Correcting Capabilities:
None

Handle 0x0008, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: DIMM0
Bank Connections: 0 1
Current Speed: Unknown
Type: DIMM SDRAM
Installed Size: 1024 MB (Single-bank Connection)
Enabled Size: 1024 MB (Single-bank Connection)
Error Status: OK

Handle 0x0009, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: DIMM1
Bank Connections: 2 3
Current Speed: Unknown
Type: DIMM SDRAM
Installed Size: 1024 MB (Single-bank Connection)
Enabled Size: 1024 MB (Single-bank Connection)
Error Status: OK

Handle 0x000A, DMI type 13, 22 bytes
BIOS Language Information
Language Description Format: Long
Installable Languages: 1
en|US|iso8859-1
Currently Installed Language: en|US|iso8859-1

Handle 0x000B, DMI type 15, 35 bytes
System Event Log
Area Length: 4 bytes
Header Start Offset: 0x0000
Header Length: 2 bytes
Data Start Offset: 0x0002
Access Method: Indexed I/O, one 16-bit index port, one 8-bit data port
Access Address: Index 0x046A, Data 0x046C
Status: Invalid, Not Full
Change Token: 0x00000000
Header Format: No Header
Supported Log Type Descriptors: 6
Descriptor 1: End of log
Data Format 1: OEM-specific
Descriptor 2: End of log
Data Format 2: OEM-specific
Descriptor 3: End of log
Data Format 3: OEM-specific
Descriptor 4: End of log
Data Format 4: OEM-specific
Descriptor 5: End of log
Data Format 5: OEM-specific
Descriptor 6: End of log
Data Format 6: OEM-specific

Handle 0x000C, DMI type 16, 15 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 4 GB
Error Information Handle: Not Provided
Number Of Devices: 2

Handle 0x000D, DMI type 19, 15 bytes
Memory Array Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x0007FFFFFFF
Range Size: 2 GB
Physical Array Handle: 0x000C
Partition Width: 4

Handle 0x000E, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x000C
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 1024 MB
Form Factor: SODIMM
Set: None
Locator: DIMM0
Bank Locator: BANK0
Type: DDR2
Type Detail: Synchronous
Speed: 800 MHz
Manufacturer: Manufacturer00
Serial Number: SerNum00
Asset Tag: AssetTagNum0
Part Number: ModulePartNumber00
Rank: Unknown

Handle 0x000F, DMI type 20, 19 bytes
Memory Device Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x0003FFFFFFF
Range Size: 1 GB
Physical Device Handle: 0x000E
Memory Array Mapped Address Handle: 0x000D
Partition Row Position: 1
Interleaved Data Depth: 1

Handle 0x0010, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x000C
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 1024 MB
Form Factor: SODIMM
Set: None
Locator: DIMM1
Bank Locator: BANK1
Type: DDR2
Type Detail: Synchronous
Speed: 800 MHz
Manufacturer: Manufacturer01
Serial Number: SerNum01
Asset Tag: AssetTagNum1
Part Number: ModulePartNumber01
Rank: Unknown

Handle 0x0011, DMI type 20, 19 bytes
Memory Device Mapped Address
Starting Address: 0x00040000000
Ending Address: 0x0007FFFFFFF
Range Size: 1 GB
Physical Device Handle: 0x0010
Memory Array Mapped Address Handle: 0x000D
Partition Row Position: 1
Interleaved Data Depth: 1

Handle 0x0012, DMI type 32, 20 bytes
System Boot Information
Status: No errors detected

Handle 0x0013, DMI type 41, 11 bytes
Onboard Device
Reference Designation: To Be Filled By O.E.M.
Type: Video
Status: Enabled
Type Instance: 0

Handle 0x0014, DMI type 41, 11 bytes
Onboard Device
Reference Designation: To Be Filled By O.E.M.
Type: SCSI Controller
Status: Disabled
Type Instance: 0

Handle 0x0015, DMI type 127, 4 bytes
End Of Table

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