AM3517 driving LCD with (DE) Data Enable signal

Hi Andrew,

You can find description about display subsystem and how to connect and how to programming it in the Technical reference manual section 7 - Display subsystem at the link below:

http://www.ti.com/lit/ug/sprugn4r/sprugn4r.pdf

More details about necessary LCD-specific registers defining the output configuration you can find in section - 7.5.3.5 LCD-Specific Control Registers.

I suggest you to look at a patch which is an example for adding an output panel driver for LCD panels at the link:

http://cgit.freedesktop.org/~robclark/linux/commit/?h=tilcdc-next&id=0d4bbaf9f3e5b9f52150ddc5a4ee8b0ab83a440b

BR

Tsvetolin Shulev

Thank-you Tsvetlion for your reply.

I have read several TI manuals that mention HSYNC and VSYNC GATING, which seems to be just what I need, but the manuals never say what gets gated with what?

I am not even a "git novice" (always used svn), so applying the patch seemed a little daunting, but when I looked at my Linux kernel sources, there is no sub-directory "tilcdc" for git to patch ?

I'm using the "TI_Android_GingerBread_2_3_4Sources".

I will keep looking, but if you have any other thoughts I'd love to hear them.

Best regards

Andrew

Sorry if this is such a simple question....

Does the tar file you pointed me at, just replace my kernel sources. So effectively I'm just replacing the kernel and Android should still sit on top #:0)

Andrew

Andrew,

The tar file should be extracted and then you should use git am ...  command but perhaps the patch could not be applied on your sources because it comes from other kernel branch version 3.12 but it could be used only for example.

About configuring sequence of the gated mode you should look at Figutre 7-138 in the Technical Reference Manual. About AcBias you enable ACBIASGATED bit of the DISPC_CONFIG[8] register.

BR

Tsvetolin Shulev

Thanks Tsvetolin,

At lest this confirms I am on the right track of which bit to set:

About configuring sequence of the gated mode you should look at Figutre 7-138 in theTechnical Reference Manual. About AcBias you enable ACBIASGATED bit of the DISPC_CONFIG[8] register.

I could copy accross the tilcdc sources to my kernel, then I just need to work out how to set it as the default device to use.

Andrew

I could not guarantee that the source from the patch will working with your kernel but you can try.

BR

Tsvetolin Shulev