On Fri, Nov 16, 2012 at 11:20:55PM +0100, Marc Dietrich wrote:
> This adds host1x support which includes HDMI and LVDS support.
>
> Signed-off-by: Marc Dietrich <marvin24@xxxxxx>
> ---
> arch/arm/boot/dts/tegra20-paz00.dts | 27 ++++++++++++++++++++++-----
> 1 file changed, 22 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/boot/dts/tegra20-paz00.dts b/arch/arm/boot/dts/tegra20-paz00.dts
> index e884fa5..3f7f5a2 100644
> --- a/arch/arm/boot/dts/tegra20-paz00.dts
> +++ b/arch/arm/boot/dts/tegra20-paz00.dts
> @@ -244,7 +244,7 @@
> clock-frequency = <216000000>;
> };
>
> - i2c@7000c000 {
> + lvds_ddc: i2c@7000c000 {
> status = "okay";
> clock-frequency = <400000>;
You might want to change this to 100 kHz as well. I think some displays
don't like fast mode. Then again, if you've verified that this works on
AC100 I suppose it can just as well stay as is.
On a side-note, I've found that Tegra doesn't do proper 400 kHz either,
but rather something like 375 kHz. Stephen, is this a known issue or is
it actually supposed to be able to do exactly 400 kHz?
>
> @@ -256,9 +256,9 @@
> };
> };
>
> - i2c@7000c400 {
> + hdmi_ddc: i2c@7000c400 {
> status = "okay";
> - clock-frequency = <400000>;
> + clock-frequency = <100000>;
> };
>
> nvec {
> @@ -399,13 +399,13 @@
> regulator-max-microvolt = <1800000>;
> };
>
> - ldo7 {
> + hdmi_vdd_reg: ldo7 {
> regulator-name = "+3.3vs_ldo7,avdd_hdmi";
> regulator-min-microvolt = <3300000>;
> regulator-max-microvolt = <3300000>;
> };
>
> - ldo8 {
> + hdmi_pll_reg: ldo8 {
> regulator-name = "+1.8vs_ldo8,avdd_hdmi_pll";
> regulator-min-microvolt = <1800000>;
> regulator-max-microvolt = <1800000>;
> @@ -499,6 +499,23 @@
> };
> };
>
> + host1x {
The host1x node should be sorted earlier, according to its bus address.
> + dc@54200000 {
> + rgb {
> + status = "okay";
> + nvidia,ddc-i2c-bus = <&lvds_ddc>;
> + };
> + };
> +
> + hdmi {
> + status = "okay";
> + vdd-supply = <&hdmi_vdd_reg>;
> + pll-supply = <&hdmi_pll_reg>;
> + nvidia,ddc-i2c-bus = <&hdmi_ddc>;
> + nvidia,hpd-gpio = <&gpio 111 0>; /* PN7 */
> + };
> + };
As Stephen already mentioned, and I think you already experienced,
tegra-drm has issues with two enabled outputs that run at different
resolutions, so you should probably keep HDMI disabled for now.
Thierry
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