On Thu, Sep 04, 2014 at 06:43:05PM +0200, Markus Niebel wrote:
> From: Markus Niebel <[email protected]>
>
> using LVDS channel 1 on an i.MX53 leads to following error:
>
> imx-ldb 53fa8008.ldb: unable to set di0 parent clock to ldb_di1
>
> This comes from imx_ldb_set_clock with mux = 0. Mux parameter must be "1" for
> reparenting di1 clock to ldb_di1. The value of the mux param comes from device
> tree port settings.
>
> On i.MX5, the internal two-input-multiplexer is used. Due to hardware
> limitations,
> only one port (port@[0,1]) can be used for each channel (lvds-channel@[0,1],
> respectively)
>
> Documentation update suggested by Philipp Zabel <[email protected]>
>
> Signed-off-by: Markus Niebel <[email protected]>
Philipp,
Does the patch look good to you? I feel more comfortable to send it as
a fix and stable material only with your ACK at this stage.
Shawn
> ---
> Documentation/devicetree/bindings/staging/imx-drm/ldb.txt | 15
> +++++++++++++--
> arch/arm/boot/dts/imx53.dtsi | 12 ++++++++++--
> 2 files changed, 23 insertions(+), 4 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/staging/imx-drm/ldb.txt
> b/Documentation/devicetree/bindings/staging/imx-drm/ldb.txt
> index 578a1fc..443bcb6 100644
> --- a/Documentation/devicetree/bindings/staging/imx-drm/ldb.txt
> +++ b/Documentation/devicetree/bindings/staging/imx-drm/ldb.txt
> @@ -56,6 +56,9 @@ Required properties:
> - fsl,data-width : should be <18> or <24>
> - port: A port node with endpoint definitions as defined in
> Documentation/devicetree/bindings/media/video-interfaces.txt.
> + On i.MX5, the internal two-input-multiplexer is used.
> + Due to hardware limitations, only one port (port@[0,1])
> + can be used for each channel (lvds-channel@[0,1], respectively)
> On i.MX6, there should be four ports (port@[0-3]) that correspond
> to the four LVDS multiplexer inputs.
>
> @@ -78,6 +81,8 @@ ldb: ldb@53fa8008 {
> "di0", "di1";
>
> lvds-channel@0 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> reg = <0>;
> fsl,data-mapping = "spwg";
> fsl,data-width = <24>;
> @@ -86,7 +91,9 @@ ldb: ldb@53fa8008 {
> /* ... */
> };
>
> - port {
> + port@0 {
> + reg = <0>;
> +
> lvds0_in: endpoint {
> remote-endpoint = <&ipu_di0_lvds0>;
> };
> @@ -94,6 +101,8 @@ ldb: ldb@53fa8008 {
> };
>
> lvds-channel@1 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> reg = <1>;
> fsl,data-mapping = "spwg";
> fsl,data-width = <24>;
> @@ -102,7 +111,9 @@ ldb: ldb@53fa8008 {
> /* ... */
> };
>
> - port {
> + port@1 {
> + reg = <1>;
> +
> lvds1_in: endpoint {
> remote-endpoint = <&ipu_di1_lvds1>;
> };
> diff --git a/arch/arm/boot/dts/imx53.dtsi b/arch/arm/boot/dts/imx53.dtsi
> index 6456a00..1a2202d 100644
> --- a/arch/arm/boot/dts/imx53.dtsi
> +++ b/arch/arm/boot/dts/imx53.dtsi
> @@ -419,10 +419,14 @@
> status = "disabled";
>
> lvds-channel@0 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> reg = <0>;
> status = "disabled";
>
> - port {
> + port@0 {
> + reg = <0>;
> +
> lvds0_in: endpoint {
> remote-endpoint =
> <&ipu_di0_lvds0>;
> };
> @@ -430,10 +434,14 @@
> };
>
> lvds-channel@1 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> reg = <1>;
> status = "disabled";
>
> - port {
> + port@1 {
> + reg = <1>;
> +
> lvds1_in: endpoint {
> remote-endpoint =
> <&ipu_di1_lvds1>;
> };
> --
> 2.1.0
>
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