On Tue, Jun 10, 2014 at 9:58 AM, Fabio Estevam <festevam@xxxxxxxxx> wrote:
> On Mon, Jun 9, 2014 at 5:09 PM, Russell King - ARM Linux
> <linux@xxxxxxxxxxxxxxxx> wrote:
>
>> Right, so the problem isn't at the HDMI level, but at the DI level... so
>> that's where we need to debug what's being setup. I left some debugging
>> in ipu-di.c - could you try enabling that please?
>
> Booting the kernel with the HDMI cable connected (no image is seen on
> HDMI, only on LVDS):
In case it helps, I am also able to reproduce the problem on a
imx6dl-hummingboard using the attached debug patch.
From 7084bfd985330890a0a313961682959f7ace3723 Mon Sep 17 00:00:00 2001
From: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
Date: Tue, 10 Jun 2014 10:28:31 -0300
Subject: [PATCH] imx6dl-hummingboard: Add LVDS support for debugging purposes
Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
---
arch/arm/boot/dts/imx6dl-hummingboard.dts | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/arch/arm/boot/dts/imx6dl-hummingboard.dts b/arch/arm/boot/dts/imx6dl-hummingboard.dts
index 5373a5f..e6005ea 100644
--- a/arch/arm/boot/dts/imx6dl-hummingboard.dts
+++ b/arch/arm/boot/dts/imx6dl-hummingboard.dts
@@ -78,6 +78,31 @@
status = "okay";
};
+&ldb {
+ status = "okay";
+
+ lvds-channel@1 {
+ fsl,data-mapping = "spwg";
+ fsl,data-width = <18>;
+ status = "okay";
+
+ display-timings {
+ native-mode = <&timing0>;
+ timing0: hsd100pxn1 {
+ clock-frequency = <65000000>;
+ hactive = <1024>;
+ vactive = <768>;
+ hback-porch = <220>;
+ hfront-porch = <40>;
+ vback-porch = <21>;
+ vfront-porch = <7>;
+ hsync-len = <60>;
+ vsync-len = <10>;
+ };
+ };
+ };
+};
+
&i2c1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_hummingboard_i2c1>;
--
1.8.3.2
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