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charset="utf-8" Same to i.MX8mp LDB, i.MX93 LDB is controlled by mediamix blk-ctrl through 'ldb' register and 'lvds' register. Also, the 'ldb' clock is required. i.MX93 LDB supports only one LVDS channel(channel 0, a.k.a, LVDS Channel-A in the device tree binding documentation), while i.MX8mp LDB supports at most two. Add i.MX93 LDB device tree binding in the existing i.MX8mp LDB device tree binding documentation. Signed-off-by: Liu Ying Acked-by: Krzysztof Kozlowski --- .../bindings/display/bridge/fsl,ldb.yaml | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml = b/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml index b19be0804abe..6e0e3ba9b49e 100644 --- a/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml +++ b/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml @@ -16,7 +16,9 @@ description: | =20 properties: compatible: - const: fsl,imx8mp-ldb + enum: + - fsl,imx8mp-ldb + - fsl,imx93-ldb =20 clocks: maxItems: 1 @@ -57,6 +59,18 @@ required: - clocks - ports =20 +allOf: + - if: + properties: + compatible: + contains: + const: fsl,imx93-ldb + then: + properties: + ports: + properties: + port@2: false + additionalProperties: false =20 examples: --=20 2.37.1 From nobody Sun Sep 14 12:26:51 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2554EC25B4E for ; 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b=Y5DA/2LouYn2rd84NXz4fY0Kn7eSvOBCk8KSvdS7Aq8aches1ZjyGupvAx54i27mU/JFGtXZCYXSiu72i4E8iRnHaJzZTFI4+yz85lb8E9C+q0lureT05L9ByO5LIvLh/JIBBJskzoPbCBGcBDGyuiCCbaYYimA3n6IW74ZuDkY= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) by AM9PR04MB7491.eurprd04.prod.outlook.com (2603:10a6:20b:283::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6002.27; Sun, 22 Jan 2023 08:13:25 +0000 Received: from AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::5725:92ec:f43e:f5fc]) by AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::5725:92ec:f43e:f5fc%7]) with mapi id 15.20.6002.028; Sun, 22 Jan 2023 08:13:25 +0000 From: Liu Ying To: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: andrzej.hajda@intel.com, neil.armstrong@linaro.org, robert.foss@linaro.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@gmail.com, daniel@ffwll.ch, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, marex@denx.de, linux-imx@nxp.com Subject: [PATCH 2/2] drm/bridge: fsl-ldb: Add i.MX93 LDB support Date: Sun, 22 Jan 2023 16:14:29 +0800 Message-Id: <20230122081429.694574-3-victor.liu@nxp.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230122081429.694574-1-victor.liu@nxp.com> References: <20230122081429.694574-1-victor.liu@nxp.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SG2PR01CA0182.apcprd01.prod.exchangelabs.com (2603:1096:4:189::20) To AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM7PR04MB7046:EE_|AM9PR04MB7491:EE_ X-MS-Office365-Filtering-Correlation-Id: c3bb2beb-c05c-45a3-1e78-08dafc5088f7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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charset="utf-8" Same to i.MX8mp LDB, i.MX93 LDB is controlled by mediamix blk-ctrl through LDB_CTRL and LVDS_CTRL registers. i.MX93 LDB supports only one LVDS channel(channel 0) and it's LVDS_CTRL register bit1 is used as LVDS_EN instead of CH1_EN. Add i.MX93 LDB support in the existing i.MX8mp LDB bridge driver by adding i.MX93 LDB compatible string and device data(to reflect different register offsets and LVDS_CTRL register bit1 definition). Signed-off-by: Liu Ying --- drivers/gpu/drm/bridge/fsl-ldb.c | 53 ++++++++++++++++++++++++++------ 1 file changed, 44 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/bridge/fsl-ldb.c b/drivers/gpu/drm/bridge/fsl-= ldb.c index f9e0f8d99268..7da2b2dbc7cb 100644 --- a/drivers/gpu/drm/bridge/fsl-ldb.c +++ b/drivers/gpu/drm/bridge/fsl-ldb.c @@ -18,7 +18,6 @@ #include #include =20 -#define LDB_CTRL 0x5c #define LDB_CTRL_CH0_ENABLE BIT(0) #define LDB_CTRL_CH0_DI_SELECT BIT(1) #define LDB_CTRL_CH1_ENABLE BIT(2) @@ -35,9 +34,9 @@ #define LDB_CTRL_ASYNC_FIFO_ENABLE BIT(24) #define LDB_CTRL_ASYNC_FIFO_THRESHOLD_MASK GENMASK(27, 25) =20 -#define LVDS_CTRL 0x128 #define LVDS_CTRL_CH0_EN BIT(0) #define LVDS_CTRL_CH1_EN BIT(1) +#define LVDS_CTRL_LVDS_EN BIT(1) #define LVDS_CTRL_VBG_EN BIT(2) #define LVDS_CTRL_HS_EN BIT(3) #define LVDS_CTRL_PRE_EMPH_EN BIT(4) @@ -52,6 +51,29 @@ #define LVDS_CTRL_VBG_ADJ(n) (((n) & 0x7) << 17) #define LVDS_CTRL_VBG_ADJ_MASK GENMASK(19, 17) =20 +enum fsl_ldb_devtype { + IMX8MP_LDB, + IMX93_LDB, +}; + +struct fsl_ldb_devdata { + u32 ldb_ctrl; + u32 lvds_ctrl; + bool lvds_en_bit; +}; + +static const struct fsl_ldb_devdata fsl_ldb_devdata[] =3D { + [IMX8MP_LDB] =3D { + .ldb_ctrl =3D 0x5c, + .lvds_ctrl =3D 0x128, + }, + [IMX93_LDB] =3D { + .ldb_ctrl =3D 0x20, + .lvds_ctrl =3D 0x24, + .lvds_en_bit =3D true, + }, +}; + struct fsl_ldb { struct device *dev; struct drm_bridge bridge; @@ -59,6 +81,7 @@ struct fsl_ldb { struct clk *clk; struct regmap *regmap; bool lvds_dual_link; + const struct fsl_ldb_devdata *devdata; }; =20 static inline struct fsl_ldb *to_fsl_ldb(struct drm_bridge *bridge) @@ -158,12 +181,12 @@ static void fsl_ldb_atomic_enable(struct drm_bridge *= bridge, reg |=3D LDB_CTRL_DI1_VSYNC_POLARITY; } =20 - regmap_write(fsl_ldb->regmap, LDB_CTRL, reg); + regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->ldb_ctrl, reg); =20 /* Program LVDS_CTRL */ reg =3D LVDS_CTRL_CC_ADJ(2) | LVDS_CTRL_PRE_EMPH_EN | LVDS_CTRL_PRE_EMPH_ADJ(3) | LVDS_CTRL_VBG_EN; - regmap_write(fsl_ldb->regmap, LVDS_CTRL, reg); + regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->lvds_ctrl, reg); =20 /* Wait for VBG to stabilize. */ usleep_range(15, 20); @@ -172,7 +195,7 @@ static void fsl_ldb_atomic_enable(struct drm_bridge *br= idge, if (fsl_ldb->lvds_dual_link) reg |=3D LVDS_CTRL_CH1_EN; =20 - regmap_write(fsl_ldb->regmap, LVDS_CTRL, reg); + regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->lvds_ctrl, reg); } =20 static void fsl_ldb_atomic_disable(struct drm_bridge *bridge, @@ -180,9 +203,14 @@ static void fsl_ldb_atomic_disable(struct drm_bridge *= bridge, { struct fsl_ldb *fsl_ldb =3D to_fsl_ldb(bridge); =20 - /* Stop both channels. */ - regmap_write(fsl_ldb->regmap, LVDS_CTRL, 0); - regmap_write(fsl_ldb->regmap, LDB_CTRL, 0); + /* Stop channel(s). */ + if (fsl_ldb->devdata->lvds_en_bit) + /* Set LVDS_CTRL_LVDS_EN bit to disable. */ + regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->lvds_ctrl, + LVDS_CTRL_LVDS_EN); + else + regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->lvds_ctrl, 0); + regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->ldb_ctrl, 0); =20 clk_disable_unprepare(fsl_ldb->clk); } @@ -248,6 +276,10 @@ static int fsl_ldb_probe(struct platform_device *pdev) if (!fsl_ldb) return -ENOMEM; =20 + fsl_ldb->devdata =3D of_device_get_match_data(dev); + if (!fsl_ldb->devdata) + return -EINVAL; + fsl_ldb->dev =3D &pdev->dev; fsl_ldb->bridge.funcs =3D &funcs; fsl_ldb->bridge.of_node =3D dev->of_node; @@ -306,7 +338,10 @@ static int fsl_ldb_remove(struct platform_device *pdev) } =20 static const struct of_device_id fsl_ldb_match[] =3D { - { .compatible =3D "fsl,imx8mp-ldb", }, + { .compatible =3D "fsl,imx8mp-ldb", + .data =3D &fsl_ldb_devdata[IMX8MP_LDB], }, + { .compatible =3D "fsl,imx93-ldb", + .data =3D &fsl_ldb_devdata[IMX93_LDB], }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, fsl_ldb_match); --=20 2.37.1