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Mon, 23 Jan 2023 02:13:47 +0000 From: Liu Ying To: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/2] dt-bindings: display: bridge: ldb: Add i.MX93 LDB Date: Mon, 23 Jan 2023 10:14:48 +0800 Message-Id: <20230123021449.969243-2-victor.liu@nxp.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230123021449.969243-1-victor.liu@nxp.com> References: <20230123021449.969243-1-victor.liu@nxp.com> X-ClientProxiedBy: SGAP274CA0022.SGPP274.PROD.OUTLOOK.COM (2603:1096:4:b6::34) To AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM7PR04MB7046:EE_|PAXPR04MB8878:EE_ X-MS-Office365-Filtering-Correlation-Id: e0a7ec36-c352-4684-266b-08dafce775c0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; 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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. Acked-by: Krzysztof Kozlowski Signed-off-by: Liu Ying --- v2->v3: * No change. v1->v2: * Drop redundant "device tree binding" from patch subject. (Krzysztof) * Add Krzysztof's A-b tag. .../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: | properties: compatible: - const: fsl,imx8mp-ldb + enum: + - fsl,imx8mp-ldb + - fsl,imx93-ldb clocks: maxItems: 1 @@ -57,6 +59,18 @@ required: - clocks - ports +allOf: + - if: + properties: + compatible: + contains: + const: fsl,imx93-ldb + then: + properties: + ports: + properties: + port@2: false + additionalProperties: false examples: From patchwork Mon Jan 23 02:14:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liu Ying X-Patchwork-Id: 13111634 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 90996C54EB4 for ; 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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). Reviewed-by: Marek Vasut Signed-off-by: Liu Ying --- v2->v3: * Provide comment on LVDS_CTRL_LVDS_EN bit when defining it's macro. (Marek) * Add Marek's R-b tag. v1->v2: * No change. drivers/gpu/drm/bridge/fsl-ldb.c | 57 +++++++++++++++++++++++++++----- 1 file changed, 48 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/bridge/fsl-ldb.c b/drivers/gpu/drm/bridge/fsl-ldb.c index f9e0f8d99268..85e0ccb27afe 100644 --- a/drivers/gpu/drm/bridge/fsl-ldb.c +++ b/drivers/gpu/drm/bridge/fsl-ldb.c @@ -18,7 +18,6 @@ #include #include -#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 +34,13 @@ #define LDB_CTRL_ASYNC_FIFO_ENABLE BIT(24) #define LDB_CTRL_ASYNC_FIFO_THRESHOLD_MASK GENMASK(27, 25) -#define LVDS_CTRL 0x128 #define LVDS_CTRL_CH0_EN BIT(0) #define LVDS_CTRL_CH1_EN BIT(1) +/* + * LVDS_CTRL_LVDS_EN bit is poorly named in i.MX93 reference manual. + * Clear it to enable LVDS and set it to disable LVDS. + */ +#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 +55,29 @@ #define LVDS_CTRL_VBG_ADJ(n) (((n) & 0x7) << 17) #define LVDS_CTRL_VBG_ADJ_MASK GENMASK(19, 17) +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[] = { + [IMX8MP_LDB] = { + .ldb_ctrl = 0x5c, + .lvds_ctrl = 0x128, + }, + [IMX93_LDB] = { + .ldb_ctrl = 0x20, + .lvds_ctrl = 0x24, + .lvds_en_bit = true, + }, +}; + struct fsl_ldb { struct device *dev; struct drm_bridge bridge; @@ -59,6 +85,7 @@ struct fsl_ldb { struct clk *clk; struct regmap *regmap; bool lvds_dual_link; + const struct fsl_ldb_devdata *devdata; }; static inline struct fsl_ldb *to_fsl_ldb(struct drm_bridge *bridge) @@ -158,12 +185,12 @@ static void fsl_ldb_atomic_enable(struct drm_bridge *bridge, reg |= LDB_CTRL_DI1_VSYNC_POLARITY; } - regmap_write(fsl_ldb->regmap, LDB_CTRL, reg); + regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->ldb_ctrl, reg); /* Program LVDS_CTRL */ reg = 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); /* Wait for VBG to stabilize. */ usleep_range(15, 20); @@ -172,7 +199,7 @@ static void fsl_ldb_atomic_enable(struct drm_bridge *bridge, if (fsl_ldb->lvds_dual_link) reg |= LVDS_CTRL_CH1_EN; - regmap_write(fsl_ldb->regmap, LVDS_CTRL, reg); + regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->lvds_ctrl, reg); } static void fsl_ldb_atomic_disable(struct drm_bridge *bridge, @@ -180,9 +207,14 @@ static void fsl_ldb_atomic_disable(struct drm_bridge *bridge, { struct fsl_ldb *fsl_ldb = to_fsl_ldb(bridge); - /* 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); clk_disable_unprepare(fsl_ldb->clk); } @@ -248,6 +280,10 @@ static int fsl_ldb_probe(struct platform_device *pdev) if (!fsl_ldb) return -ENOMEM; + fsl_ldb->devdata = of_device_get_match_data(dev); + if (!fsl_ldb->devdata) + return -EINVAL; + fsl_ldb->dev = &pdev->dev; fsl_ldb->bridge.funcs = &funcs; fsl_ldb->bridge.of_node = dev->of_node; @@ -306,7 +342,10 @@ static int fsl_ldb_remove(struct platform_device *pdev) } static const struct of_device_id fsl_ldb_match[] = { - { .compatible = "fsl,imx8mp-ldb", }, + { .compatible = "fsl,imx8mp-ldb", + .data = &fsl_ldb_devdata[IMX8MP_LDB], }, + { .compatible = "fsl,imx93-ldb", + .data = &fsl_ldb_devdata[IMX93_LDB], }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, fsl_ldb_match);