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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29650c5caf1sm17227635ad.34.2025.11.05.23.13.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Nov 2025 23:13:20 -0800 (PST) From: Yongxing Mou Date: Thu, 06 Nov 2025 15:12:06 +0800 Subject: [PATCH v2] arm64: dts: qcom: hamoa-iot-evk: 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: <20251106-hamoa_dvt_backlight-v2-1-9f844c8f8110@oss.qualcomm.com> X-B4-Tracking: v=1; b=H4sIAEVKDGkC/32O0Y7CIBBFf6WZ58UALYX6tP+xMYYOgyVrRQEbj em/L9b3fbnJucmcuS/IlAJl2DcvSLSEHOKlgvxqACd7ORELrjJILpXg0rDJztEe3VKOo8Xfczh NhbW6VdKMGkkT1MtrIh8em/Xn8OFEt3uVl08Jo83EMM5zKPvGaydbY4gIZTf0vcfOKfStdJr3n ivReTlYVPB2TSGXmJ7b4EVssn+3LYIJNmjC0ThuHRffMefd7W7P7/e7GnBY1/UPwFLfVQkBAAA = 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 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1762413197; l=2985; i=yongxing.mou@oss.qualcomm.com; s=20250910; h=from:subject:message-id; bh=MUGcFi8GfLNzzEBwGZDoyqGOApQoP636XmrpJ5mjW6k=; b=gLgELKm9Dyy46SmXQCftAwpgJOnBc2lYZua+NCpJ1uPluUUQSs8Rh7fMHqda0ItNlQl2bW3P/ KBtJTcTbUMOBiZi1Jr20l5pGusNbyWAvQvwMJn8DfGg4fmq3vI5/5r+ X-Developer-Key: i=yongxing.mou@oss.qualcomm.com; a=ed25519; pk=rAy5J1eP+V7OXqH5FJ7ngMCtUrnHhut30ZTldOj52UM= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTA2MDA1NyBTYWx0ZWRfXzRHmM2R+B2TO /aWLuk7d9gRrBsMSltEGFZRfYa+yegqyhAix/xw2wVhduIbL2VFQXY5Q2bVpDraK7uSPAZQPvQ1 f2vHlOEBfGk97SICSGx8ccppBnb7OIvmcn6ITHlrryeFY2DScs6sSY6EczR6udAqup6bADuBpRs UrybRG2pFJ4+ZL+FiRHlc9lEr2epQ/HHhIDynBu4VwFZZ/TTopehJmKz4POPz1LejM+VJDnfPiA CLiPE6Lk9xY1lKINLJVVvaU8u/N2uG7eUD45QvDZcvg7e141GFuzI0C7CXNU1nwJznJUYO3EQz6 kk8ccXB6vB0KtaJF3gzFEYB5JiYoAWv0MK4wdPIMV+ospK2/BqcgAlATgACF0k3QI+8H+4TjDgA 2+9A2jBW/9Df6H+jyH0nXW8fQQOPTg== X-Authority-Analysis: v=2.4 cv=LoCfC3dc c=1 sm=1 tr=0 ts=690c4a92 cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=I4knr0C1cHqesIZZmIQA:9 a=QEXdDO2ut3YA:10 a=1OuFwYUASf3TG4hYMiVC:22 X-Proofpoint-GUID: cHg_ZhNuDnE2SqG4KdWK9IveyZF7Sux5 X-Proofpoint-ORIG-GUID: cHg_ZhNuDnE2SqG4KdWK9IveyZF7Sux5 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-06_01,2025-11-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 clxscore=1015 malwarescore=0 suspectscore=0 spamscore=0 phishscore=0 impostorscore=0 bulkscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511060057 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 Reviewed-by: Abel Vesa --- Changes in v2: - Add hamoa-iot-evk to the commit subject. [Konrad] - Correct the property order in the vreg_edp_bl node. [Konrad] - Link to v1: https://lore.kernel.org/r/20251028-hamoa_dvt_backlight-v1-1-9= 7ecb8d0ad01@oss.qualcomm.com --- 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 36dd6599402b..454aad40de34 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-0 =3D <&edp_bl_reg_en>; + pinctrl-names =3D "default"; + + 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