From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roger Quadros Subject: [PATCH 2/4] ARM: dts: omap4-panda: Fix DVI EDID reads Date: Tue, 18 Jun 2013 14:11:29 +0300 Message-ID: <1371553891-29364-3-git-send-email-rogerq@ti.com> References: <1371553891-29364-1-git-send-email-rogerq@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1371553891-29364-1-git-send-email-rogerq-l0cyMroinI0@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: "devicetree-discuss" To: tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org, b-cousson-l0cyMroinI0@public.gmane.org Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Tomi Valkeinen , linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Roger Quadros List-Id: linux-omap@vger.kernel.org On Panda the +5V supply for DVI EDID is supplied by the same regulator that poweres the USB Hub. Currently, the DSS/DVI subsystem doesn't know how to manage this regulator and so DVI EDID reads will fail if USB Hub is not enabled. As a temporary fix we keep this regulator permanently enabled on boot. This fixes the DVI EDID read problem. CC: Tomi Valkeinen Signed-off-by: Roger Quadros --- arch/arm/boot/dts/omap4-panda-common.dtsi | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/arch/arm/boot/dts/omap4-panda-common.dtsi b/arch/arm/boot/dts/omap4-panda-common.dtsi index 7a21e8e..40df79e 100644 --- a/arch/arm/boot/dts/omap4-panda-common.dtsi +++ b/arch/arm/boot/dts/omap4-panda-common.dtsi @@ -80,6 +80,11 @@ gpio = <&gpio1 1 0>; /* gpio_1 */ startup-delay-us = <70000>; enable-active-high; + /* + * FIXME: Remove boot-on when DSS can handle this regulator + * for DVI EDID. + */ + regulator-boot-on; }; /* HS USB Host PHY on PORT 1 */ -- 1.7.4.1