From: Philipp Zabel <p.zabel@pengutronix.de>
To: Heiko Stuebner <heiko@sntech.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>,
devicetree@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
Pawel Moll <pawel.moll@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
dianders@chromium.org, linux-kernel@vger.kernel.org,
linux-rockchip@lists.infradead.org, broonie@kernel.org,
dri-devel@lists.freedesktop.org, Yakir Yang <ykk@rock-chips.com>,
Andy Yan <andy.yan@rock-chips.com>,
Mark Rutland <mark.rutland@arm.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 0/3] add power-supply support to dw_hdmi
Date: Tue, 10 Mar 2015 10:08:46 +0100 [thread overview]
Message-ID: <1425978526.3141.13.camel@pengutronix.de> (raw)
In-Reply-To: <1429128.MSqYm0qZ9p@phil>
Am Dienstag, den 10.03.2015, 00:21 +0100 schrieb Heiko Stuebner:
> At least the Rockchip variant of the dw_hdmi should control its supplying
> regulators. A cursory glance at the imx manual didn't any equivalent there,
> so I'm not sure if there are similar controllable regulators present.
On i.MX6 the HDMI_VP (1.1 V) and HDMI_VPH (2.5 V) are usually supplied
by the internal LDO_SoC via VDD_SOC_CAP (also used for ARM cache, SATA,
and PCIe) and the LDO_2P5 via VDDHIGH_CAP (also used for PLLs, MIPI,
SATA, PCIe, USB, and LVDS), respectively.
While I haven't seen anyone ever do this, it should be possible to
supply them from an external regulator.
regards
Philipp
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next prev parent reply other threads:[~2015-03-10 9:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-09 23:21 [PATCH 0/3] add power-supply support to dw_hdmi Heiko Stuebner
2015-03-09 23:22 ` [PATCH 1/3] regulator: don't emit errors in {devm_}regulator_bulk_get when defering Heiko Stuebner
2015-03-10 12:07 ` Mark Brown
2015-03-10 12:33 ` Heiko Stuebner
2015-03-09 23:22 ` [PATCH 2/3] drm/bridge: dw-hdmi: support optional supply regulators Heiko Stuebner
2015-03-10 9:16 ` Philipp Zabel
2015-03-10 9:43 ` Heiko Stuebner
2015-03-09 23:23 ` [PATCH 3/3] ARM: dts: rockchip: add hdmi analog power supplies to rk3288 boards Heiko Stuebner
2015-03-10 9:08 ` Philipp Zabel [this message]
2015-03-10 9:58 ` [PATCH 0/3] add power-supply support to dw_hdmi Russell King - ARM Linux
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