On Mon, May 09, 2016 at 11:19:16AM +0300, Jani Nikula wrote:
On Fri, 06 May 2016, Sudip Mukherjee sudipm.mukherjee@gmail.com wrote:
On Fri, May 06, 2016 at 12:21:04PM +0100, Sudip Mukherjee wrote:
Hi Daniel, I am trying to use i915 in one of our board which has Intel ATOM E3840. I know Intel has released emgd driver for this cpu to use i915 but emgd is not supported on v4.5 (or v4.6). The board is having SFI (simple firmware interface) and maybe for that i915 is not finding the VBIOS and other required information.
I have been looking more into it and looks like it is supposed to use dsi but since there is no vbt so has_mipi is never set and dsi is never initialized. Can you please point me to somewhere or maybe give some idea how i can use i915 in a board where there is no vbt.
Hate to say it, but the i915 DSI support heavily relies on the VBT being present. Basically all the configuration is there. I haven't got a clue how emgd handles it. Maybe Matt does?
emgd has a config file where we have to specify the configuration for it to work.
Basically you'd either have to figure out the configuration for the panel from somewhere and feed it to intel_dsi_panel_vbt.c, or write a panel specific driver of your own.
and i guess i will also need to modify intel_dsi_init() as that is also taking some of the information from the VBT.
Thanks for the information.
regards sudip