15 Mar
2011
15 Mar
'11
1:32 p.m.
On Tue, Mar 15, 2011 at 02:30:55PM +0100, Olivier Galibert wrote:
On Tue, Mar 15, 2011 at 01:52:26AM +0000, Matthew Garrett wrote:
Now that we've got multiple consumers it's probably not helpful to move the (potentially chip-specific) VBT handling to general code. We've got zero documentation on how GMA500 handles VBT, and not a great deal more for i915.
I'm not sure what you mean by "handles". If you mean find it, the gma500 driver code reads a 32-bit pointer to the opregion at offset 0xfc in the pci configuration space. If you mean parse it, I haven't seen anything that looked different to what the current kernel code parses.
Opregion is one mechanism to provide VBT - it doesn't define it.
--
Matthew Garrett | mjg59@srcf.ucam.org