Messages in this thread | | | Date | Mon, 14 Apr 2008 11:33:33 -0400 | From | Andres Salomon <> | Subject | Re: OLPC: gxfb/lxfb: add DCON panel modes to framebuffer drivers |
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On Mon, 14 Apr 2008 09:18:56 -0600 Jordan Crouse <jordan.crouse@amd.com> wrote:
> On 14/04/08 10:33 +0200, Arnd Bergmann wrote: > > On Monday 14 April 2008, Andres Salomon wrote: > > > Since there's no way to autodetect panel modes, we're forced to hardcode > > > them in the driver and add a big fat #ifdef. The OLPC DCON needs a > > > specific mode line (at 1200x900). This adds it to both gxfb and lxfb. > > > > > > Signed-off-by: Andres Salomon <dilinger@debian.org> > > > > Since the XO is based on Open Firmware, shouldn't the panel size really be > > a property in the device tree that can be read by this driver? > > Andre's description was slightly misleading. We could probably detect > the panel mode, but there isn't any reason to since the panel timings > are well known and won't change. While OFW detection would be good > computer science fu, it would be a wasted effort since its so easy to hard > code them into the table. > > Jordan >
Right, that's what I get for sending this stuff out at 4am. To be clear, the issue that we have to hard code ways to access panel timing info on a per-platform and/or per-bios basis. There's no standard way to fetch it across all Geodes (that I'm aware of). Even the VSA doesn't really help us here.
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