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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7a414065418sm10662426b3a.41.2025.10.28.00.04.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Oct 2025 00:04:35 -0700 (PDT) From: Yongxing Mou Date: Tue, 28 Oct 2025 15:04:26 +0800 Subject: [PATCH] arm64: dts: qcom: Add backlight support for eDP panel Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251028-hamoa_dvt_backlight-v1-1-97ecb8d0ad01@oss.qualcomm.com> X-B4-Tracking: v=1; b=H4sIAPlqAGkC/yXM4QqDIBSG4VsJf0+wU6Z1KyPCjseSrdrUxSC69 8n6+XzwvQeLFDxF1hUHC7T76Lc1o7wVDGezTsS9zWYgQJYCNJ/NspnB7mkYDT6efpoTr1QlQY8 KSRHLz1cg57//6r2/HOj9yfF0jWw0kThuy+JTVzhlodKaiBDqtmkc1laiq8Aq0Tghy9pBa1Cy/ jx/iCzMobEAAAA= X-Change-ID: 20251028-hamoa_dvt_backlight-373528b7ce7e To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Yongxing Mou X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1761635073; l=2798; i=yongxing.mou@oss.qualcomm.com; s=20250910; h=from:subject:message-id; bh=AYT3RVzsICMpupLHCjCVqyv7YtWQ3D8cjixobbkFe+4=; b=MeacmXm4s2Vc6Tv/AqoCu1wPSkQUq+YAckqk0Y8QOTdRpiSa6cCzG6uqyC8z0iK68h42Q2fhb s7tosjseM7GDR+jFL0bhE+J9Gp2Qy9FqgJB2h82xNNe/QikJ4T0lN32 X-Developer-Key: i=yongxing.mou@oss.qualcomm.com; a=ed25519; pk=rAy5J1eP+V7OXqH5FJ7ngMCtUrnHhut30ZTldOj52UM= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMDI4MDA1OSBTYWx0ZWRfX+XdqOT2pJnNd pAEzLlQUnOgSXF6Wei9Kcph30+QpydUFBvgDBeWZRB6KJ/WfYUd2Hgp0JN/ZfSXmrGyqUfvz7y6 dgZTel4ukYzXpe7zJRjQ6z0j3TZmlPBrDRJkbYVRZVcTzQzg/KgnlICzU6qeZgRR/LUeNI4aa8A RCpqIvsFC7AZ4LagvjUjHtgprKGguzZJuLYfknkiXDzBpgQ95Tm4omyU0M0ox44Z3wkyZUBBZ1p TqElSdot3/be63g5RgXHPNYWZ8S2ZCPyA/iCo29kHgL66XtHOpCqi0AK4IKVmxQwmLzLAAYKnIG C6UEZL8EFZ6BJ8uyp0BbOOWNz0a7M+wGGqHawA6ujWmVR7eH6gxuga3nFwKaWuH1l0RQ45PtSAx xSi1aZsY1LawmqH2wHrT3pakOPnTLg== X-Authority-Analysis: v=2.4 cv=RIW+3oi+ c=1 sm=1 tr=0 ts=69006b05 cx=c_pps a=WW5sKcV1LcKqjgzy2JUPuA==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=x6icFKpwvdMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=I4knr0C1cHqesIZZmIQA:9 a=QEXdDO2ut3YA:10 a=OpyuDcXvxspvyRM73sMx:22 X-Proofpoint-ORIG-GUID: Af_O_gZed7P8uxcLJffFRQAkZdeU_gPa X-Proofpoint-GUID: Af_O_gZed7P8uxcLJffFRQAkZdeU_gPa X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-10-28_03,2025-10-22_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 spamscore=0 impostorscore=0 adultscore=0 priorityscore=1501 malwarescore=0 clxscore=1015 bulkscore=0 phishscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510020000 definitions=main-2510280059 Previously, the eDP panel backlight was enabled via UEFI. Added backlight control node in kernel DTS due to some meta may not enable the backlight. Aligned with other x1e80100-based platforms: the PWM signal is controlled by PMK8550, and the backlight enable signal is handled by PMC8380. Signed-off-by: Yongxing Mou --- arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 55 ++++++++++++++++++++++++++= ++++ 1 file changed, 55 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts b/arch/arm64/boot/d= ts/qcom/hamoa-iot-evk.dts index 36dd6599402b4650b7f8ad2c0cd22212116a25fe..fda1b3a3c7673be74832c278492= 31cba4bc1f25f 100644 --- a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts +++ b/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts @@ -17,6 +17,16 @@ aliases { serial1 =3D &uart14; }; =20 + backlight: backlight { + compatible =3D "pwm-backlight"; + pwms =3D <&pmk8550_pwm 0 5000000>; + enable-gpios =3D <&pmc8380_3_gpios 4 GPIO_ACTIVE_HIGH>; + power-supply =3D <&vreg_edp_bl>; + + pinctrl-0 =3D <&edp_bl_en>, <&edp_bl_pwm>; + pinctrl-names =3D "default"; + }; + wcd938x: audio-codec { compatible =3D "qcom,wcd9385-codec"; =20 @@ -183,6 +193,22 @@ vreg_edp_3p3: regulator-edp-3p3 { regulator-boot-on; }; =20 + vreg_edp_bl: regulator-edp-bl { + compatible =3D "regulator-fixed"; + + regulator-name =3D "VBL9"; + regulator-min-microvolt =3D <3600000>; + regulator-max-microvolt =3D <3600000>; + + gpio =3D <&pmc8380_3_gpios 10 GPIO_ACTIVE_HIGH>; + enable-active-high; + + pinctrl-names =3D "default"; + pinctrl-0 =3D <&edp_bl_reg_en>; + + regulator-boot-on; + }; + vreg_nvme: regulator-nvme { compatible =3D "regulator-fixed"; =20 @@ -819,6 +845,8 @@ &mdss_dp3 { aux-bus { panel { compatible =3D "edp-panel"; + + backlight =3D <&backlight>; power-supply =3D <&vreg_edp_3p3>; =20 port { @@ -879,6 +907,22 @@ usb0_1p8_reg_en: usb0-1p8-reg-en-state { }; }; =20 +&pmc8380_3_gpios { + edp_bl_en: edp-bl-en-state { + pins =3D "gpio4"; + function =3D "normal"; + power-source =3D <1>; + input-disable; + output-enable; + }; + + edp_bl_reg_en: edp-bl-reg-en-state { + pins =3D "gpio10"; + function =3D "normal"; + }; + +}; + &pmc8380_5_gpios { usb0_pwr_1p15_reg_en: usb0-pwr-1p15-reg-en-state { pins =3D "gpio8"; @@ -890,6 +934,17 @@ usb0_pwr_1p15_reg_en: usb0-pwr-1p15-reg-en-state { }; }; =20 +&pmk8550_gpios { + edp_bl_pwm: edp-bl-pwm-state { + pins =3D "gpio5"; + function =3D "func3"; + }; +}; + +&pmk8550_pwm { + status =3D "okay"; +}; + &smb2360_0 { status =3D "okay"; }; --- base-commit: f7d2388eeec24966fc4d5cf32d706f0514f29ac5 change-id: 20251028-hamoa_dvt_backlight-373528b7ce7e Best regards, --=20 Yongxing Mou