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 <tomi.valkei...@ti.com>
Signed-off-by: Roger Quadros <rog...@ti.com>
---
arch/arm/boot/dts/omap4-panda-common.dtsi | 7 +++++++
1 files changed, 7 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..e6e6c39 100644
--- a/arch/arm/boot/dts/omap4-panda-common.dtsi
+++ b/arch/arm/boot/dts/omap4-panda-common.dtsi
@@ -80,6 +80,13 @@
gpio = <&gpio1 1 0>; /* gpio_1 */
startup-delay-us = <70000>;
enable-active-high;
+ /*
+ * boot-on is required along with always-on as the
+ * regulator framework doesn't enable the regulator
+ * if boot-on is not there.
+ */
+ regulator-always-on;
+ regulator-boot-on;
};
/* HS USB Host PHY on PORT 1 */
--
1.7.4.1
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