Messages in this thread | | | From | Chen-Yu Tsai <> | Date | Mon, 8 Apr 2019 15:28:24 +0800 | 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 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.
ChenYu
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