[PATCH 1/3] arm64: dts: rockchip: introduce pclk_vio_grf in eDP device node

Enric Balletbo i Serra enric.balletbo at collabora.com
Wed Feb 7 08:31:48 PST 2018

From: Yakir Yang <ykk at rock-chips.com>

The pclk_vio_grf supply power for VIO GRF IOs, if it is disabled,
driver would failed to operate the VIO GRF registers.

The clock is optional but one of the side effects of don't have this clk
is that the Samsung Chromebook Plus fails to recover display after a
suspend/resume with following errors:

    rockchip-dp ff970000.edp: Input stream clock not detected.
    rockchip-dp ff970000.edp: Timeout of video streamclk ok
    rockchip-dp ff970000.edp: unable to config video

Signed-off-by: Yakir Yang <ykk at rock-chips.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo at collabora.com>
 arch/arm64/boot/dts/rockchip/rk3399.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
index 9551e773ff78..beef28f7309d 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
@@ -1741,8 +1741,8 @@
 		compatible = "rockchip,rk3399-edp";
 		reg = <0x0 0xff970000 0x0 0x8000>;
 		interrupts = <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH 0>;
-		clocks = <&cru PCLK_EDP>, <&cru PCLK_EDP_CTRL>;
-		clock-names = "dp", "pclk";
+		clocks = <&cru PCLK_EDP>, <&cru PCLK_EDP_CTRL>, <&cru PCLK_VIO_GRF>;
+		clock-names = "dp", "pclk", "grf";
 		pinctrl-names = "default";
 		pinctrl-0 = <&edp_hpd>;
 		power-domains = <&power RK3399_PD_EDP>;

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