From 95671ec23696d7351b47d159159c6bdcb64fafe4 Mon Sep 17 00:00:00 2001 From: Douglas Anderson Date: Mon, 1 Apr 2019 10:17:23 -0700 Subject: [PATCH] ARM: dts: rockchip: Specify rk3288-veyron-chromebook's display timings Let's document the display timings that most veyron chromebooks (like jaq, jerry, mighty, speedy) have been using out in the field. This uses the standard blankings but a slightly slower clock rate, thus getting a refresh rate 58.3 Hz. NOTE: this won't really do anything except cause DRM to properly report the refresh rate since vop_crtc_mode_fixup() was rounding the pixel clock to 74.25 MHz anyway. Apparently the adjusted rate isn't exposed to userspace so it's important that the rate we're trying to achieve is mostly right. For the downstream kernel change related to this see See https://crrev.com/c/324558. NOTE: minnie uses a different panel will be fixed up in a future patch, so for now we'll just delete the panel timings there. Signed-off-by: Douglas Anderson Signed-off-by: Heiko Stuebner --- arch/arm/boot/dts/rk3288-veyron-chromebook.dtsi | 14 ++++++++++++++ arch/arm/boot/dts/rk3288-veyron-minnie.dts | 2 ++ 2 files changed, 16 insertions(+) diff --git a/arch/arm/boot/dts/rk3288-veyron-chromebook.dtsi b/arch/arm/boot/dts/rk3288-veyron-chromebook.dtsi index 1cadb52..6a28ce3 100644 --- a/arch/arm/boot/dts/rk3288-veyron-chromebook.dtsi +++ b/arch/arm/boot/dts/rk3288-veyron-chromebook.dtsi @@ -91,6 +91,20 @@ power-supply = <&vcc33_lcd>; backlight = <&backlight>; + panel-timing { + clock-frequency = <74250000>; + hactive = <1366>; + hfront-porch = <136>; + hback-porch = <60>; + hsync-len = <30>; + hsync-active = <0>; + vactive = <768>; + vfront-porch = <8>; + vback-porch = <12>; + vsync-len = <12>; + vsync-active = <0>; + }; + ports { panel_in: port { panel_in_edp: endpoint { diff --git a/arch/arm/boot/dts/rk3288-veyron-minnie.dts b/arch/arm/boot/dts/rk3288-veyron-minnie.dts index 9008e70..92ab897 100644 --- a/arch/arm/boot/dts/rk3288-veyron-minnie.dts +++ b/arch/arm/boot/dts/rk3288-veyron-minnie.dts @@ -138,6 +138,8 @@ &panel { compatible = "auo,b101ean01", "simple-panel"; power-supply= <&panel_regulator>; + + /delete-node/ panel-timing; }; &rk808 { -- 2.7.4