MLK-11953: arm: dts: Fix HDMI compliance test 7-15 failed

i.MX6QP SabreSD board HDMI compliance test 7-15 Vcec2 test failed,
the value is 0.403V, which should be 0.274V>Vcec2>0.196V.

Disable the pad internal PU resistor, and change the external PU
resistor(R647) from 47K to 100K.
With all the changes, the calculated voltage on CEC is 0.248V, and the
test value is 0.250V.

In the patch disable CEC pin internal PULL/Keep function.

Signed-off-by: Sandor Yu <R01008@freescale.com>
(cherry picked from commit 0a9388ff8ef77778f5e81d8dbc980cacf87fc12b)

diff --git a/arch/arm/boot/dts/imx6qdl-sabresd.dtsi b/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
index efdde48..0f22254 100644 (file)
--- a/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
@@ -716,7 +716,7 @@
 
                pinctrl_hdmi_cec: hdmicecgrp {
                        fsl,pins = <
-                               MX6QDL_PAD_KEY_ROW2__HDMI_TX_CEC_LINE 0x1f8b0
+                               MX6QDL_PAD_KEY_ROW2__HDMI_TX_CEC_LINE 0x108b0
                        >;
                };