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From:   Alexandru Stan <amstan@chromium.org>
To:     Thierry Reding <thierry.reding@gmail.com>,
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        <u.kleine-koenig@pengutronix.de>, Lee Jones <lee.jones@linaro.org>,
        Daniel Thompson <daniel.thompson@linaro.org>,
        Jingoo Han <jingoohan1@gmail.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        Heiko Stuebner <heiko@sntech.de>,
        Rob Herring <robh+dt@kernel.org>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>
Cc:     Douglas Anderson <dianders@chromium.org>,
        Enric Balletbo i Serra <enric.balletbo@collabora.com>,
        Matthias Kaehlcke <mka@chromium.org>,
        Alexandru Stan <amstan@chromium.org>,
        devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH v2 3/3] arm64: dts: qcom: trogdor: Add brightness-levels
Date:   Tue, 13 Oct 2020 01:01:03 -0700
Message-Id: <20201013010056.v2.3.Ie4d84af5a85e8dcb8f575845518fa39f324a827d@changeid>
In-Reply-To: <20201013080103.410133-1-amstan@chromium.org>
References: <20201013080103.410133-1-amstan@chromium.org>
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Now that we have better interpolation for the backlight
("backlight: pwm_bl: Fix interpolation"), we can now add the curve to
the trogdor boards, being careful to crop the low end.

Signed-off-by: Alexandru Stan <amstan@chromium.org>
---

 arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
index bf875589d364..ccdabc6c4994 100644
--- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
@@ -179,6 +179,15 @@ pp3300_fp_tp: pp3300-fp-tp-regulator {
 	backlight: backlight {
 		compatible = "pwm-backlight";
 
+		/* The panels don't seem to like anything below ~ 5% */
+		brightness-levels = <
+			196 256 324 400 484 576 676 784 900 1024 1156 1296
+			1444 1600 1764 1936 2116 2304 2500 2704 2916 3136
+			3364 3600 3844 4096
+		>;
+		num-interpolated-steps = <64>;
+		default-brightness-level = <951>;
+
 		pwms = <&cros_ec_pwm 1>;
 		enable-gpios = <&tlmm 12 GPIO_ACTIVE_HIGH>;
 		power-supply = <&ppvar_sys>;
-- 
2.28.0