On 26 July 2018 at 12:12, Andrzej Hajda <a.hajda@xxxxxxxxxxx> wrote:
> HDMI-HPD was set active low, moreover by default pincontrol
> chip sets pull-down on the pin. As a result HDMI driver
> assumes TV is always connected regardless of actual state.
> The patch fixes it.
>
> Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
> ---
> arch/arm/boot/dts/exynos5250-arndale.dts | 4 +++-
> arch/arm/boot/dts/exynos5250-pinctrl.dtsi | 5 +++++
> 2 files changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/exynos5250-arndale.dts b/arch/arm/boot/dts/exynos5250-arndale.dts
> index 591023391f7d..26bae5157177 100644
> --- a/arch/arm/boot/dts/exynos5250-arndale.dts
> +++ b/arch/arm/boot/dts/exynos5250-arndale.dts
> @@ -210,9 +210,11 @@
> };
>
> &hdmi {
> + pinctrl-names = "default";
> + pinctrl-0 = <&hdmi_hpd>;
> status = "okay";
> ddc = <&i2c_ddc>;
> - hpd-gpios = <&gpx3 7 GPIO_ACTIVE_LOW>;
> + hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
The gpx3-7 (HDMI-HPD) has external pull up to... so maybe it should be
active low? How can it go high if it is already high?
I am not sure if this matters because the driver ignores the flags and
responds on both falling and rising edge.
Best regards,
Krzysztof
> vdd_osc-supply = <&ldo10_reg>;
> vdd_pll-supply = <&ldo8_reg>;
> vdd-supply = <&ldo8_reg>;
> diff --git a/arch/arm/boot/dts/exynos5250-pinctrl.dtsi b/arch/arm/boot/dts/exynos5250-pinctrl.dtsi
> index b25d520393b8..d31a68672bfa 100644
> --- a/arch/arm/boot/dts/exynos5250-pinctrl.dtsi
> +++ b/arch/arm/boot/dts/exynos5250-pinctrl.dtsi
> @@ -599,6 +599,11 @@
> samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;
> };
> +
> + hdmi_hpd: hdmi-hpd {
> + samsung,pins = "gpx3-7";
> + samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> + };
> };
>
> &pinctrl_1 {
> --
> 2.18.0
>
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