Great. So this means I2C2 is used for LCD and HDMI both. While HDMI is
not plugged, the EDID of LCD will be checked out, right?
Mark
On 11/19/2012 05:43 PM, Alexandre Courbot wrote:
> Enable host1x and add the rgb output.
>
> Also add the power sequence that controls the backlight and panel. The
> sequence strictly follows the order and timings of the panel
> specification.
>
> Currently the backlight device controls both backlight and panel, this
> needs to be fixed once the panel framework supports power sequences.
>
> Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
> ---
> arch/arm/boot/dts/tegra20-ventana.dts | 108 +++++++++++++++++++++++++++++++++-
> 1 file changed, 105 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/boot/dts/tegra20-ventana.dts b/arch/arm/boot/dts/tegra20-ventana.dts
> index adc4754..31c9c5c 100644
> --- a/arch/arm/boot/dts/tegra20-ventana.dts
> +++ b/arch/arm/boot/dts/tegra20-ventana.dts
> @@ -10,6 +10,15 @@
> reg = <0x00000000 0x40000000>;
> };
>
> + host1x {
> + dc@54200000 {
> + rgb {
> + status = "okay";
> + nvidia,ddc-i2c-bus = <&lcd_ddc>;
> + };
> + };
> + };
> +
> pinmux {
> pinctrl-names = "default";
> pinctrl-0 = <&state_default>;
> @@ -341,7 +350,7 @@
> #size-cells = <0>;
> };
>
> - i2c@1 {
> + lcd_ddc: i2c@1 {
> reg = <1>;
> #address-cells = <1>;
> #size-cells = <0>;
> @@ -516,6 +525,99 @@
> bus-width = <8>;
> };
>
> + backlight: backlight {
> + compatible = "pwm-backlight";
> + brightness-levels = <0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 255>;
> + default-brightness-level = <12>;
> +
> + /* resources used by the power sequences */
> + pwms = <&pwm 2 5000000>;
> + pwm-names = "backlight";
> + power-supply = <&vdd_bl_reg>;
> + panel-supply = <&vdd_panel_reg>;
> +
> + power-sequences {
> + power-on {
> + /*
> + * Panel power and LVDS enable.
> + * TODO: move into the panel device as soon as
> + * panel framework supports power sequences.
> + */
> + step0 {
> + type = "regulator";
> + id = "panel";
> + enable;
> + };
> + step1 {
> + type = "gpio";
> + gpio = <&gpio 10 0>;
> + value = <1>;
> + };
> + step2 {
> + type = "delay";
> + delay = <200000>;
> + };
> + /* Backlight sequence. This belongs here. */
> + step3 {
> + type = "regulator";
> + id = "power";
> + enable;
> + };
> + step4 {
> + type = "delay";
> + delay = <10000>;
> + };
> + step5 {
> + type = "pwm";
> + id = "backlight";
> + enable;
> + };
> + step6 {
> + type = "gpio";
> + gpio = <&gpio 28 0>;
> + value = <1>;
> + };
> + };
> +
> + power-off {
> + step0 {
> + type = "gpio";
> + gpio = <&gpio 28 0>;
> + value = <0>;
> + };
> + step1 {
> + type = "pwm";
> + id = "backlight";
> + disable;
> + };
> + step2 {
> + type = "delay";
> + delay = <10000>;
> + };
> + step3 {
> + type = "regulator";
> + id = "power";
> + disable;
> + };
> + /* This also belongs to the panel sequence */
> + step4 {
> + type = "delay";
> + delay = <200000>;
> + };
> + step5 {
> + type = "gpio";
> + gpio = <&gpio 10 0>;
> + value = <0>;
> + };
> + step6 {
> + type = "regulator";
> + id = "panel";
> + disable;
> + };
> + };
> + };
> + };
> +
> regulators {
> compatible = "simple-bus";
> #address-cells = <1>;
> @@ -549,7 +651,7 @@
> enable-active-high;
> };
>
> - regulator@3 {
> + vdd_panel_reg: regulator@3 {
> compatible = "regulator-fixed";
> reg = <3>;
> regulator-name = "vdd_pnl";
> @@ -559,7 +661,7 @@
> enable-active-high;
> };
>
> - regulator@4 {
> + vdd_bl_reg: regulator@4 {
> compatible = "regulator-fixed";
> reg = <4>;
> regulator-name = "vdd_bl";
>
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