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[152.78.0.24]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-40fb89065b5sm27029828f8f.17.2025.10.01.07.00.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Oct 2025 07:01:04 -0700 (PDT) From: Junjie Cao To: Neil Armstrong , Jessica Zhang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Sean Paul , Marijn Suijten , Antonino Maniscalco , Jonathan Marek , Eugene Lepshy , Jun Nie Cc: Junjie Cao , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org Subject: [PATCH 1/3] dt-bindings: display: panel: Add Novatek NT36532 Date: Wed, 1 Oct 2025 21:59:12 +0800 Message-ID: <20251001135914.13754-2-caojunjie650@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251001135914.13754-1-caojunjie650@gmail.com> References: <20251001135914.13754-1-caojunjie650@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" NT36532 is a driver IC used to drive MIPI-DSI panels. It is found in OnePlus Pad 2 tablets with CSOT panels. Signed-off-by: Junjie Cao --- .../display/panel/novatek,nt36532.yaml | 83 +++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/panel/novatek= ,nt36532.yaml diff --git a/Documentation/devicetree/bindings/display/panel/novatek,nt3653= 2.yaml b/Documentation/devicetree/bindings/display/panel/novatek,nt36532.ya= ml new file mode 100644 index 000000000000..ca4b16459a72 --- /dev/null +++ b/Documentation/devicetree/bindings/display/panel/novatek,nt36532.yaml @@ -0,0 +1,83 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/panel/novatek,nt36532.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Novatek NT36532 based DSI display Panels + +maintainers: + - Junjie Cao + +description: | + The NT36532 IC from Novatek is a Driver IC used to drive MIPI-DSI panels. + +allOf: + - $ref: panel-common-dual.yaml# + +properties: + compatible: + items: + - enum: + - csot,ppc100hb1-1 + - const: novatek,nt36532 + + reg: + maxItems: 1 + + reset-gpios: + maxItems: 1 + description: phandle of gpio for reset line - This should be 8mA + + vddio-supply: + description: regulator that supplies the I/O voltage + + ports: true + +required: + - compatible + - reg + - vddio-supply + - reset-gpios + - ports + +unevaluatedProperties: false + +examples: + - | + #include + + dsi { + #address-cells =3D <1>; + #size-cells =3D <0>; + + panel@0 { + compatible =3D "csot,ppc100hb1-1", "novatek,nt36532"; + reg =3D <0>; + + reset-gpios =3D <&tlmm 133 GPIO_ACTIVE_LOW>; + + vddio-supply =3D <&vreg_l12b_1p8>; + + 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 2.48.1 From nobody Wed Oct 1 20:28:46 2025 Received: from mail-wm1-f66.google.com (mail-wm1-f66.google.com [209.85.128.66]) (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 BD6263019C5 for ; Wed, 1 Oct 2025 14:01:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.66 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759327279; cv=none; b=avWt0BtcuislAKYeetZZ2F62TEWr8RyZMv+BiiYrS0QenzA/Fd3gVJPXTRPvFlX8AbsBiseER4A29mixmjj+vqx++DFXlpBXrlG6uU2CtSprvlqi1jiqDkdd6NHCQXK8bE6nDVvCqbfR2PcHkAGn1FwQueqZVnZKoZGRqlVf7Tk= ARC-Message-Signature: i=1; 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[152.78.0.24]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-40fb89065b5sm27029828f8f.17.2025.10.01.07.01.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Oct 2025 07:01:14 -0700 (PDT) From: Junjie Cao To: Neil Armstrong , Jessica Zhang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Sean Paul , Marijn Suijten , Antonino Maniscalco , Jonathan Marek , Eugene Lepshy , Jun Nie Cc: Junjie Cao , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org Subject: [PATCH 2/3] drm/msm/dsi: support DSC configurations with slice_per_pkt > 1 Date: Wed, 1 Oct 2025 21:59:13 +0800 Message-ID: <20251001135914.13754-3-caojunjie650@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251001135914.13754-1-caojunjie650@gmail.com> References: <20251001135914.13754-1-caojunjie650@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" From: Jun Nie Some panels support multiple slice to be sent in a single DSC packet. And this feature is a must for specific panels, such as JDI LPM026M648C. Add a dsc_slice_per_pkt member into struct mipi_dsi_device and support the feature in msm mdss driver. Co-developed-by: Jonathan Marek Signed-off-by: Jonathan Marek Signed-off-by: Jun Nie Signed-off-by: Junjie Cao --- drivers/gpu/drm/msm/dsi/dsi_host.c | 25 ++++++++++--------------- include/drm/drm_mipi_dsi.h | 2 ++ 2 files changed, 12 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/d= si_host.c index e0de545d4077..773ce8520698 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -166,6 +166,7 @@ struct msm_dsi_host { =20 struct drm_display_mode *mode; struct drm_dsc_config *dsc; + unsigned int dsc_slice_per_pkt; =20 /* connected device info */ unsigned int channel; @@ -910,17 +911,10 @@ static void dsi_update_dsc_timing(struct msm_dsi_host= *msm_host, bool is_cmd_mod slice_per_intf =3D dsc->slice_count; =20 total_bytes_per_intf =3D dsc->slice_chunk_size * slice_per_intf; - bytes_per_pkt =3D dsc->slice_chunk_size; /* * slice_per_pkt; */ + bytes_per_pkt =3D dsc->slice_chunk_size * msm_host->dsc_slice_per_pkt; =20 eol_byte_num =3D total_bytes_per_intf % 3; - - /* - * Typically, pkt_per_line =3D slice_per_intf * slice_per_pkt. - * - * Since the current driver only supports slice_per_pkt =3D 1, - * pkt_per_line will be equal to slice per intf for now. - */ - pkt_per_line =3D slice_per_intf; + pkt_per_line =3D slice_per_intf / msm_host->dsc_slice_per_pkt; =20 if (is_cmd_mode) /* packet data type */ reg =3D DSI_COMMAND_COMPRESSION_MODE_CTRL_STREAM0_DATATYPE(MIPI_DSI_DCS_= LONG_WRITE); @@ -1069,12 +1063,8 @@ static void dsi_timing_setup(struct msm_dsi_host *ms= m_host, bool is_bonded_dsi) else /* * When DSC is enabled, WC =3D slice_chunk_size * slice_per_pkt + 1. - * Currently, the driver only supports default value of slice_per_pkt = =3D 1 - * - * TODO: Expand mipi_dsi_device struct to hold slice_per_pkt info - * and adjust DSC math to account for slice_per_pkt. */ - wc =3D msm_host->dsc->slice_chunk_size + 1; + wc =3D msm_host->dsc->slice_chunk_size * msm_host->dsc_slice_per_pkt + = 1; =20 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_CTRL, DSI_CMD_MDP_STREAM0_CTRL_WORD_COUNT(wc) | @@ -1683,8 +1673,13 @@ static int dsi_host_attach(struct mipi_dsi_host *hos= t, msm_host->lanes =3D dsi->lanes; msm_host->format =3D dsi->format; msm_host->mode_flags =3D dsi->mode_flags; - if (dsi->dsc) + if (dsi->dsc) { msm_host->dsc =3D dsi->dsc; + msm_host->dsc_slice_per_pkt =3D dsi->dsc_slice_per_pkt; + /* for backwards compatibility, assume 1 if not set */ + if (!msm_host->dsc_slice_per_pkt) + msm_host->dsc_slice_per_pkt =3D 1; + } =20 ret =3D dsi_dev_attach(msm_host->pdev); if (ret) diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 3aba7b380c8d..2ddec7931bd0 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -180,6 +180,7 @@ struct mipi_dsi_device_info { * be set to the real limits of the hardware, zero is only accepted for * legacy drivers * @dsc: panel/bridge DSC pps payload to be sent + * @dsc_slice_per_pkt: number of DSC slices to be sent as in a single pack= et */ struct mipi_dsi_device { struct mipi_dsi_host *host; @@ -194,6 +195,7 @@ struct mipi_dsi_device { unsigned long hs_rate; unsigned long lp_rate; struct drm_dsc_config *dsc; + unsigned int dsc_slice_per_pkt; 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[152.78.0.24]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-40fb89065b5sm27029828f8f.17.2025.10.01.07.01.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Oct 2025 07:01:22 -0700 (PDT) From: Junjie Cao To: Neil Armstrong , Jessica Zhang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Sean Paul , Marijn Suijten , Antonino Maniscalco , Jonathan Marek , Eugene Lepshy , Jun Nie Cc: Junjie Cao , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org Subject: [PATCH 3/3] drm/panel: Add Novatek NT36532 panel driver Date: Wed, 1 Oct 2025 21:59:14 +0800 Message-ID: <20251001135914.13754-4-caojunjie650@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251001135914.13754-1-caojunjie650@gmail.com> References: <20251001135914.13754-1-caojunjie650@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 Novatek NT36532 Display Driver IC, including support for the CSOT PPC100HB1-1, found in the OnePlus Pad 2 tablets. Signed-off-by: Junjie Cao --- MAINTAINERS | 7 + drivers/gpu/drm/panel/Kconfig | 10 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-novatek-nt36532.c | 437 ++++++++++++++++++ 4 files changed, 455 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-novatek-nt36532.c diff --git a/MAINTAINERS b/MAINTAINERS index 0c8281ea4cc6..1394b26269b8 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7914,6 +7914,13 @@ T: git https://gitlab.freedesktop.org/drm/misc/kerne= l.git F: Documentation/devicetree/bindings/display/panel/novatek,nt36523.yaml F: drivers/gpu/drm/panel/panel-novatek-nt36523.c =20 +DRM DRIVER FOR NOVATEK NT36532 PANELS +M: Junjie Cao +S: Maintained +T: git https://gitlab.freedesktop.org/drm/misc/kernel.git +F: Documentation/devicetree/bindings/display/panel/novatek,nt36532.yaml +F: drivers/gpu/drm/panel/panel-novatek-nt36532.c + DRM DRIVER FOR NOVATEK NT36672A PANELS M: Sumit Semwal S: Maintained diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 407c5f6a268b..a2ef5be43c96 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -520,6 +520,16 @@ config DRM_PANEL_NOVATEK_NT36523 around the Novatek NT36523 display controller, such as some Boe panels used in Xiaomi Mi Pad 5 and 5 Pro tablets. =20 +config DRM_PANEL_NOVATEK_NT36532 + tristate "Novatek NT36532-based MIPI-DSI panels" + depends on OF + depends on DRM_MIPI_DSI + help + Say Y here if you want to enable support for the panels built + around the Novatek NT36532 display controller, such as some + CSOT panels used in OnePlus Pad 2 tablets. These panels are + typically dual-DSI and may use DSC (Display Stream Compression). + config DRM_PANEL_NOVATEK_NT36672A tristate "Novatek NT36672A DSI panel" depends on OF diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 3615a761b44f..56b4e362890c 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_DRM_PANEL_NOVATEK_NT35510) +=3D panel-novate= k-nt35510.o obj-$(CONFIG_DRM_PANEL_NOVATEK_NT35560) +=3D panel-novatek-nt35560.o obj-$(CONFIG_DRM_PANEL_NOVATEK_NT35950) +=3D panel-novatek-nt35950.o obj-$(CONFIG_DRM_PANEL_NOVATEK_NT36523) +=3D panel-novatek-nt36523.o +obj-$(CONFIG_DRM_PANEL_NOVATEK_NT36532) +=3D panel-novatek-nt36532.o obj-$(CONFIG_DRM_PANEL_NOVATEK_NT36672A) +=3D panel-novatek-nt36672a.o obj-$(CONFIG_DRM_PANEL_NOVATEK_NT36672E) +=3D panel-novatek-nt36672e.o obj-$(CONFIG_DRM_PANEL_NOVATEK_NT37801) +=3D panel-novatek-nt37801.o diff --git a/drivers/gpu/drm/panel/panel-novatek-nt36532.c b/drivers/gpu/dr= m/panel/panel-novatek-nt36532.c new file mode 100644 index 000000000000..a2f550801f34 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-novatek-nt36532.c @@ -0,0 +1,437 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Novatek NT36532 DriverIC panels driver + * Based on the template generated by linux-mdss-dsi-panel-driver-generator + * + * Copyright (c) 2025 Junjie Cao + */ + +#include +#include +#include +#include +#include +#include +#include + +#include