Messages in this thread | | | Date | Mon, 8 Apr 2019 10:47:14 +0200 | From | Maxime Ripard <> | Subject | Re: [linux-sunxi] Re: [PATCH 02/12] drm: sun4i: Add support for enabling DDC I2C bus to dw_hdmi glue |
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On Mon, Apr 08, 2019 at 03:28:24PM +0800, Chen-Yu Tsai wrote: > On Mon, Apr 8, 2019 at 3:23 PM Maxime Ripard <maxime.ripard@bootlin.com> wrote: > > > > On Sat, Apr 06, 2019 at 01:45:04AM +0200, megous@megous.com wrote: > > > From: Ondrej Jirman <megous@megous.com> > > > > > > Orange Pi 3 board requires enabling DDC I2C bus via some GPIO connected > > > transistors, before it can be used. Model this as a power supply for DDC > > > (via regulator framework). > > > > > > Signed-off-by: Ondrej Jirman <megous@megous.com> > > > > The DDC bus itself is usually attached to the HDMI connector, so it > > would make sense to make the supply also a property of the connector. > > I believe these are separate things. What this patch covers is power for > a voltage shifter between the SoC and HDMI DDC pins. The HDMI connector's > 5V supply to power the remote DDC chip is something else. And on the > Orange Pi 3 they are indeed separate supplies.
Then maybe the endpoint link between the two would be the best place to put this?
Maxime
-- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com [unhandled content-type:application/pgp-signature] | |