I2C DDC using PCI configuration GPIO registers

[tppanchakshari]

Hi

i am unable to achieve DDC on DVI cable using dvo GPIO registers, i presume 0x5020 as dvo GPIO for DDC on DVI calble.

i presume the code which works for Analog cable using 0x5010 GPIO register, can work if we just change the Offset from 0x5010 to 0x5020.

but its not working, could anybody tell me what could be the issue,

thanks

panchi

[wedamon · Accepted solution]

Sorry if this reply is a little vague... I only have limited experience working with the display registers...

The documentation for programming the GPIO and GMBUS registers can be found in section 2.4.x of:

http://intellinuxgraphics.org/VOL_3_display_registers.pdf

You may want to try programming DDC/CI via the GMBUS registers. IMO, they're easier to understand and use than the GPIO registers...

[Val_Ferdinand_Caro]

did you figure this out?