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Mon, 16 Mar 2026 01:41:22 -0700 (PDT) From: Pengyu Luo To: Neil Armstrong , Jessica Zhang , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Pengyu Luo Subject: [PATCH v4 1/2] dt-bindings: display: panel: Add Himax HX83121A Date: Mon, 16 Mar 2026 16:40:39 +0800 Message-ID: <20260316084040.728106-2-mitltlatltl@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260316084040.728106-1-mitltlatltl@gmail.com> References: <20260316084040.728106-1-mitltlatltl@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" HX83121A is a driver IC used to drive MIPI-DSI panels. It is found in HUAWEI Matebook E Go series (Gaokun2/3) with BOE or CSOT panels. Signed-off-by: Pengyu Luo Reviewed-by: Rob Herring (Arm) --- v4: - use v2 as the base since v3 was using v1 as the base by mistake - remove '|' from description (Krzysztof) - drop description for reset-gpios (Krzysztof) v3: - remove '|' from description (Krzysztof) - drop description for reset-gpios (Krzysztof) --- .../display/panel/himax,hx83121a.yaml | 91 +++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/panel/himax,h= x83121a.yaml diff --git a/Documentation/devicetree/bindings/display/panel/himax,hx83121a= .yaml b/Documentation/devicetree/bindings/display/panel/himax,hx83121a.yaml new file mode 100644 index 0000000000..e067a2f6d0 --- /dev/null +++ b/Documentation/devicetree/bindings/display/panel/himax,hx83121a.yaml @@ -0,0 +1,91 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/panel/himax,hx83121a.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Himax HX83121A based DSI display Panels + +maintainers: + - Pengyu Luo + +description: + The Himax HX83121A is a generic DSI Panel IC used to drive dsi + panels. Support video mode panels from China Star Optoelectronics + Technology (CSOT) and BOE Technology. + +allOf: + - $ref: panel-common-dual.yaml# + +properties: + compatible: + items: + - enum: + - boe,ppc357db1-4 + - csot,ppc357db1-4 + - const: himax,hx83121a + + reg: + maxItems: 1 + + reset-gpios: + maxItems: 1 + + avdd-supply: + description: analog positive supply for IC + + avee-supply: + description: analog negative supply for IC + + vddi-supply: + description: power supply for IC + + backlight: true + ports: true + +required: + - compatible + - reg + - vddi-supply + - reset-gpios + - ports + +additionalProperties: false + +examples: + - | + #include + + dsi { + #address-cells =3D <1>; + #size-cells =3D <0>; + + panel@0 { + compatible =3D "csot,ppc357db1-4", "himax,hx83121a"; + reg =3D <0>; + + vddi-supply =3D <&vreg_l2b>; + reset-gpios =3D <&tlmm 38 GPIO_ACTIVE_LOW>; + + ports { + #address-cells =3D <1>; + #size-cells =3D <0>; + + port@0 { + reg =3D <0>; + panel_in_0: endpoint { + remote-endpoint =3D <&dsi0_out>; + }; + }; + + port@1{ + reg =3D <1>; + panel_in_1: endpoint { + remote-endpoint =3D <&dsi1_out>; + }; + }; + }; + }; + }; + +... --=20 2.53.0 From nobody Tue Apr 7 04:18:29 2026 Received: from mail-pl1-f171.google.com (mail-pl1-f171.google.com [209.85.214.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 045BD382287 for ; Mon, 16 Mar 2026 08:41:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773650491; cv=none; b=Hegm7NBl2WkzLXsQWDSRBE7bPnYX945evCZSiKLEJCIkmRvDfAUAxL+CI9qH57lbqsVd2jDRjxZA4GON9qjqa7Jje3P3dun3ZjS3FeGlzm6Kf3xoUQ8dwDdXg1q1E+n7M4OORbUH/CpEOoeku2ubPKeEFxoE28trVT/qFL6gbdY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773650491; c=relaxed/simple; bh=/BrJWewt0rXv0h9f4iaqqI2hvtdGYV1c0DlTG5rh++0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; 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Mon, 16 Mar 2026 01:41:27 -0700 (PDT) From: Pengyu Luo To: Neil Armstrong , Jessica Zhang , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Pengyu Luo Subject: [PATCH v4 2/2] drm/panel: Add Himax HX83121A panel driver Date: Mon, 16 Mar 2026 16:40:40 +0800 Message-ID: <20260316084040.728106-3-mitltlatltl@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260316084040.728106-1-mitltlatltl@gmail.com> References: <20260316084040.728106-1-mitltlatltl@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a driver for panels using the Himax HX83121A Display Driver IC, including support for the BOE/CSOT PPC357DB1-4, found in HUAWEI Matebook E Go series (Gaokun2/3). Signed-off-by: Pengyu Luo Reviewed-by: Neil Armstrong --- v4: - use v2 as the base since v3 was using v1 as the base by mistake - use backlight_enable instead of backlight_update_status to avoid NULL ptr v3: - use backlight_enable instead of backlight_update_status to avoid NULL ptr --- drivers/gpu/drm/panel/Kconfig | 11 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-himax-hx83121a.c | 749 +++++++++++++++++++ 3 files changed, 761 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-himax-hx83121a.c diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index a99f2e2a49..c18ff46e2e 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -203,6 +203,17 @@ config DRM_PANEL_HIMAX_HX83112B Say Y here if you want to enable support for Himax HX83112B-based display panels, such as the one found in the Fairphone 3 smartphone. =20 +config DRM_PANEL_HIMAX_HX83121A + tristate "Himax HX83121A-based DSI panel" + depends on OF + depends on DRM_MIPI_DSI + depends on BACKLIGHT_CLASS_DEVICE + select DRM_KMS_HELPER + help + Say Y here if you want to enable support for Himax HX83121A-based + display panels, such as the one found in the HUAWEI Matebook E Go + series. + config DRM_PANEL_HIMAX_HX8394 tristate "HIMAX HX8394 MIPI-DSI LCD panels" depends on OF diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 3336a2c0cd..372d67b8cc 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_DRM_PANEL_HIMAX_HX8279) +=3D panel-himax-hx8= 279.o obj-$(CONFIG_DRM_PANEL_HIMAX_HX83102) +=3D panel-himax-hx83102.o obj-$(CONFIG_DRM_PANEL_HIMAX_HX83112A) +=3D panel-himax-hx83112a.o obj-$(CONFIG_DRM_PANEL_HIMAX_HX83112B) +=3D panel-himax-hx83112b.o +obj-$(CONFIG_DRM_PANEL_HIMAX_HX83121A) +=3D panel-himax-hx83121a.o obj-$(CONFIG_DRM_PANEL_HIMAX_HX8394) +=3D panel-himax-hx8394.o obj-$(CONFIG_DRM_PANEL_HYDIS_HV101HD1) +=3D panel-hydis-hv101hd1.o obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) +=3D panel-ilitek-ili9322.o diff --git a/drivers/gpu/drm/panel/panel-himax-hx83121a.c b/drivers/gpu/drm= /panel/panel-himax-hx83121a.c new file mode 100644 index 0000000000..ebe643ba41 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-himax-hx83121a.c @@ -0,0 +1,749 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Himax HX83121A DriverIC panels driver + * Copyright (c) 2024-2026 Pengyu Luo + * + * Multiple panels handling based on panel-novatek-nt36523.c + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include