linux-kernel - [PATCH 09/18] arm64: dts: renesas: beacon: Fix RGB Display PWM Backlight

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Message-Id: <20201213183759.223246-10-aford173@gmail.com>
Date:   Sun, 13 Dec 2020 12:37:49 -0600
From:   Adam Ford <aford173@...il.com>
To:     linux-renesas-soc@...r.kernel.org
Cc:     aford@...conembedded.com, Adam Ford <aford173@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 09/18] arm64: dts: renesas: beacon: Fix RGB Display PWM Backlight

The backlight didn't really work correctly due to some updates that were
made in hardware.  It should be safe to apply these, because the older
hardware was never shipped to anyone, so it shouldn't break anything.
Because the display driver refers to the display as DPI, this also
renames the backlight to use DPI for consistency.

Signed-off-by: Adam Ford <aford173@...il.com>
---
 arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
index bf047a9836ed..87a0f556cd2f 100644
--- a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
+++ b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
@@ -17,12 +17,12 @@ backlight_lvds: backlight-lvds {
 		default-brightness-level = <6>;
 	};
 
-	backlight_rgb: backlight-rgb {
+	backlight_dpi: backlight-dpi {
 		compatible = "pwm-backlight";
 		power-supply = <&reg_lcd>;
 		enable-gpios = <&gpio_exp1 7 GPIO_ACTIVE_LOW>;
-		pwms = <&pwm0 0 50000>;
-		brightness-levels = <0 4 8 16 32 64 128 255>;
+		pwms = <&pwm0 0 25000>;
+		brightness-levels = <0 25 33 50 63 75 88 100>;
 		default-brightness-level = <6>;
 	};
 
@@ -136,7 +136,7 @@ panel_in: endpoint {
 	rgb {
 		/* Different LCD with compatible timings */
 		compatible = "rocktech,rk070er9427";
-		backlight = <&backlight_rgb>;
+		backlight = <&backlight_dpi>;
 		enable-gpios = <&gpio1 21 GPIO_ACTIVE_HIGH>;
 		power-supply = <&reg_lcd>;
 		port {
-- 
2.25.1