On Thu, Jan 24, 2013 at 7:09 PM, Sean Paul <seanpaul@xxxxxxxxxxxx> wrote: > This patch adds the driver for the PTN3460 LVDS/DP bridge chip. > > The driver allows the EDID emulation to be selected from device tree, > along with specifying the GPIOs driving powerdown and reset pins. > > The chip has a bug in it such that when the powerdown and reset pins > are toggled, the hotplug line blips before the bridge is completely > ready. This forces us to wait for the maximum specified setup time > (90ms) before interacting with the chip via i2c or doing DP training, as > opposed to watching the hotplug line. This limitation means that we need > to synchronize the bridge driver with the DP driver via the > ptn3460_wait_until_ready function. > > Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx> > --- > .../devicetree/bindings/drm/i2c/ptn3460.txt | 27 ++ > drivers/gpu/drm/Kconfig | 2 + > drivers/gpu/drm/i2c/Kconfig | 6 + > drivers/gpu/drm/i2c/Makefile | 2 + > drivers/gpu/drm/i2c/ptn3460.c | 283 ++++++++++++++++++++ Afaict from reading through the code, this is just a bit of special-purpose i2c code to control some hw. Imo you can just put that into your driver directory, since currently all the drivers in drm/i2c are drm_encoder_slaves (potentially shared between drivers), and I think we should keep it at that. Of course, if you plane to extend that to such an encoder slave driver, then we could move it back. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
