From patchwork Sat Jun 11 14:14:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Ying Liu X-Patchwork-Id: 12878542 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 5DEA7CCA47A for ; Sat, 11 Jun 2022 14:15:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232066AbiFKOP2 (ORCPT ); Sat, 11 Jun 2022 10:15:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52408 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235499AbiFKONs (ORCPT ); Sat, 11 Jun 2022 10:13:48 -0400 Received: from EUR04-DB3-obe.outbound.protection.outlook.com (mail-eopbgr60053.outbound.protection.outlook.com [40.107.6.53]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A49D726AE5; Sat, 11 Jun 2022 07:13:46 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=UA2Jst12x6EoNzZsCiRVJhmlD3F4dWCgohKtvoV6n0r5i6ROtYIjawyV1lsACStHJUiZcjMzVr2SQT4jzrjSA3ak/L1dT+PuhAX9xJl576OfXHk/s/xHcsBEInClj+U4gA57FlXa4qN0lX3ZX/m0DGrY8k8xY+3ZpaAPEm9rX/jKvymVdjf4qa47whNFrVySaArTnBRrrs1fljskIb3XVE948WGiZ6WuAh7HQpzY2uSi6u5tVN/YHMlJG2OGKFENAQd4G+jZKO6+mtiQaMFqetO+kXXi4BpR27AK69IvgfncCdLBjnhoOZI5z2MKg0z7quTFzFPbSyi2K6r5CT/SOA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=kPv9/pkV2T0aAGsGWCffw9RyRwxn/C/yHQfmzKD8KYA=; b=BHP+kkveinBpDbjV0NYHW/gAh0XI4jmGfLMg6NXBIbNaageHIu3459kztzOIaI3GRNAmdckz15QHzgT+RqGa2s9ajlnphCPUbfSwb4LIRGam40YW+S+0aodWh5SZ7Swu+7hIfJUfJOS8iVFtj18r8r2C27kPPBaT8PwF4BMVFQIFWRAQbH88vRD5uUkj3+6RvshIA9qH9gVDgAzGc47cn5+Xenzos3X63fW9FN/orbYMolU/Vx8VVN0yUghd/hWSRdzyg97WsL5y6MUyX3ajQiEq9bqW2YxyGSytSABjaDAXWKnme72KuXlLp0Pt5VFpHHQzONNuSzVs+7ltf5tXBQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=kPv9/pkV2T0aAGsGWCffw9RyRwxn/C/yHQfmzKD8KYA=; b=swjP7oDdcPhBGqK7fPdmk+wfN+cYIcGXX7e5m5Isbwc+2q49740o/K+8PkkVypSbsxLVn0CtQkT/SfYFtBc+p5HO7FffObpvWYD7QC4DGmHYeN0qOZ/9A+5K78Y6fkJM0z71tjwZNs2ElXycPjbI5O2Jdy59XQ4F0s/MCWD/kl0= 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 DB8PR04MB6347.eurprd04.prod.outlook.com (2603:10a6:10:107::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5332.13; Sat, 11 Jun 2022 14:13:44 +0000 Received: from AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::3c82:f63b:711a:502]) by AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::3c82:f63b:711a:502%7]) with mapi id 15.20.5332.016; Sat, 11 Jun 2022 14:13:44 +0000 From: Liu Ying To: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Cc: andrzej.hajda@intel.com, narmstrong@baylibre.com, robert.foss@linaro.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@linux.ie, daniel@ffwll.ch, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, lee.jones@linaro.org, mchehab@kernel.org, marcel.ziswiler@toradex.com Subject: [PATCH v9 08/14] drm/bridge: imx: Add i.MX8qxp pixel link to DPI support Date: Sat, 11 Jun 2022 22:14:15 +0800 Message-Id: <20220611141421.718743-9-victor.liu@nxp.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220611141421.718743-1-victor.liu@nxp.com> References: <20220611141421.718743-1-victor.liu@nxp.com> X-ClientProxiedBy: SG2PR03CA0118.apcprd03.prod.outlook.com (2603:1096:4:91::22) To AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 9eaa3a73-2047-45da-e73f-08da4bb497a4 X-MS-TrafficTypeDiagnostic: DB8PR04MB6347:EE_ X-LD-Processed: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635,ExtAddr X-Microsoft-Antispam-PRVS: 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;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM7PR04MB7046.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230016)(4636009)(366004)(5660300002)(66556008)(66476007)(66946007)(1076003)(4326008)(8676002)(86362001)(316002)(186003)(8936002)(2616005)(7416002)(30864003)(36756003)(83380400001)(52116002)(38350700002)(38100700002)(6512007)(26005)(6506007)(6666004)(508600001)(6486002)(2906002);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?q?tdbd9Z7rHoYh45Q9LLsjrfOtQe/9?= =?utf-8?q?2qEzaPlM698WXuPbuFlPSxfPhtoD/AaxthZ2lCMxV8yXsXHT3sEk/EFJOoUfl/gAs?= =?utf-8?q?Plz+kGAPImAkqc6zf9CGdopQFAwy4nhwtTP7pcK/Qhx5jeF/CJXqKwy3YiJ6gLYqd?= =?utf-8?q?qyh/doSRJBvSl47PhB1/C6eqvW/uiLjHboME8sut1rXVOcGDENZM5aWC8+odNyVI5?= =?utf-8?q?YE34d2sUcl1sS9N21c0oNtn5t2iCwaqh/2dIDMP7elZqnSscEpikd9SNicxPQKNEM?= =?utf-8?q?Cct7Gc+KHXs4LCjESQOZrsLeSMs8pFbOI6a9xfyEXUer7Us98b2B6b+3fGyMP/55H?= =?utf-8?q?FEpcCc2Jn743Ee7wWUratX5eytRw0+oEeMBasW2pnBY8N6lbodY6wm234N6C4H39B?= =?utf-8?q?Wzwe8h4fOutQIWW5iQq327nqMJzi/2neqQDtbWUO6oflcwlwMATtaOKRtoFxGNVMZ?= =?utf-8?q?xhnN2/XRmhYzL8/z+ITkpxkpg8ob20fYLJnYUBzPmqt6d3lfXaKbtTH2oUsXWDQ70?= =?utf-8?q?7/ZuSLGbMDOd+WHLarXtD9blbl5mgUuL4sHse0WEem9Pr2w02OYMQ9Dg5e9nUgVF4?= =?utf-8?q?hzLLfeT6A9tL4Oaa79uCmKtc2lSI1ur8fcsmDxWnZXbFSX7O3RE/3vvrrR7tDE1ji?= =?utf-8?q?K1g+90tM6depfwzms/qj16dCreq0rdBPXGfvzAldXyN+GlNB57ObG6IajuOjZ7mO2?= =?utf-8?q?bBJl6fHJy2HpJTGvl3TVcxWNMkiq02e8NaWqKTFFrAi+PDcezLT5IdOLLaW4SIduw?= =?utf-8?q?wEp7ShN/n13rOitNTOv2RDCwZSYRnGcEhT0F1cOI/EYm2SyfG0vknFUHMIgelkvbx?= =?utf-8?q?UEdcftZlviipm2OoaLE6jAvASEKjnuZ9erhbWgLYK8C/TF1YDIlRqFywH+4wQEmdQ?= =?utf-8?q?tsndlyJvD389hbJLWnUqn1vwNqzUWbKtOw4sb9nmzlnEmgvnwygDgsHCve3HYao8f?= =?utf-8?q?z7WiMK2Y/yxTTo3QxXxhf5g8/dxIQMiyVUuruAsDgfqT5id8Y7ISodezaIasAGV6n?= =?utf-8?q?4rEl08fAT0CPXQ4+b8HfWXQf5ZZjlZXkG1ClWyN5u8z4pNtEbSeZDy88sNszTT40v?= =?utf-8?q?1/z6dEvxAQodZcTomw3f9T9okI/XYArFwZWoWb4uCnt0MOua3oYoQDaQX/gpLUubo?= =?utf-8?q?2/dQ5TPSumVFcKLl9Tl7vgEdcN2iLTzVLFBxgfpxErTGRcI40vCAnyJYPwmefbiXJ?= =?utf-8?q?L9DxA3IoPIA4xTKzC72Go63Gk0e/j76fUT38ZAWlssFNNx/jEbkSgNdOP7Xg/gXlM?= =?utf-8?q?8cClAh3iTfHJLrY8A+cFSvB0iZtLBWMWR6pHNx67RGC4Utoc0FU45RYR7BXbOajQm?= =?utf-8?q?ZlQ1R943seDnkClmmiN4tINXHDZCCfxKttfhJYKWYzI+Oq2AiiOeTSayfblgW/Mbu?= =?utf-8?q?LVCm9kg862rTio40bPcv3Nr7VvUAqB1BJ8TOef/wl1deI9b8tJMMQ2pnXwI1urDbC?= =?utf-8?q?8yqFrDWnyJOiPRlOxLsd0JA2DappyFFKzave3q4DpVCAhCQZYiGNSwzCX0hLk07WA?= =?utf-8?q?vMO4BVqs1wSxzuV4Xi4nVEIxWEuE4qkAtUOI0thIxetRAkwHd6wWYPbWA8SikajLL?= =?utf-8?q?zEBvz3jbWKD2dLcegcmgit1rbaZWny7BptMaIUGXEhvy2X+Uu5OLFtQN6dJE1cUoN?= =?utf-8?q?8YUn7QoXqcyzZOOb2ly0+c8PvPyZfqRA=3D=3D?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9eaa3a73-2047-45da-e73f-08da4bb497a4 X-MS-Exchange-CrossTenant-AuthSource: AM7PR04MB7046.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Jun 2022 14:13:43.9521 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 5nWbNDvFiZ2gO6SqiuOTl8rm85H8B9rMwV8/N/Ddd874alEksjmmmsGKcFawVSGTuVjtHYn8IeO9tQlZv+vU8A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB8PR04MB6347 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org This patch adds a drm bridge driver for i.MX8qxp pixel link to display pixel interface(PXL2DPI). The PXL2DPI interfaces the pixel link 36-bit data output and the DSI controller’s MIPI-DPI 24-bit data input, and inputs of LVDS Display Bridge(LDB) module used in LVDS mode, to remap the pixel color codings between those modules. The PXL2DPI is purely combinatorial. Tested-by: Marcel Ziswiler # Colibri iMX8X, LT170410-2WHC, LP156WF1 Reviewed-by: Robert Foss Signed-off-by: Liu Ying --- Marcel, I add your T-b tag from v6, let me know if you want me to drop it, as the checkpatch fix and indentation fix in v7 are trivial. v8->v9: * No change. v7->v8: * No change. v6->v7: * Fix below complaints from 'checkpatch.pl --strict'. (Robert) - 'Alignment should match open parenthesis' - 'ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP' * A trivial indentation fix. (Robert) * Add Marcel's T-b tag. * Add Robert's R-b tag. v5->v6: * No change. v4->v5: * No change. v3->v4: * Use 'fsl,sc-resource' DT property to get the SCU resource ID associated with the PXL2DPI instance instead of using alias ID. (Rob) v2->v3: * Call syscon_node_to_regmap() to get regmap instead of syscon_regmap_lookup_by_phandle(). v1->v2: * Drop unnecessary port availability check. drivers/gpu/drm/bridge/imx/Kconfig | 8 + drivers/gpu/drm/bridge/imx/Makefile | 1 + drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c | 487 +++++++++++++++++++ 3 files changed, 496 insertions(+) create mode 100644 drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c diff --git a/drivers/gpu/drm/bridge/imx/Kconfig b/drivers/gpu/drm/bridge/imx/Kconfig index 9f6ec601af37..53001650a61a 100644 --- a/drivers/gpu/drm/bridge/imx/Kconfig +++ b/drivers/gpu/drm/bridge/imx/Kconfig @@ -15,3 +15,11 @@ config DRM_IMX8QXP_PIXEL_LINK help Choose this to enable display pixel link found in Freescale i.MX8qm/qxp processors. + +config DRM_IMX8QXP_PIXEL_LINK_TO_DPI + tristate "Freescale i.MX8QXP pixel link to display pixel interface" + depends on OF + select DRM_KMS_HELPER + help + Choose this to enable pixel link to display pixel interface(PXL2DPI) + found in Freescale i.MX8qxp processor. diff --git a/drivers/gpu/drm/bridge/imx/Makefile b/drivers/gpu/drm/bridge/imx/Makefile index c15469fb5789..e74dd6422e95 100644 --- a/drivers/gpu/drm/bridge/imx/Makefile +++ b/drivers/gpu/drm/bridge/imx/Makefile @@ -1,2 +1,3 @@ obj-$(CONFIG_DRM_IMX8QXP_PIXEL_COMBINER) += imx8qxp-pixel-combiner.o obj-$(CONFIG_DRM_IMX8QXP_PIXEL_LINK) += imx8qxp-pixel-link.o +obj-$(CONFIG_DRM_IMX8QXP_PIXEL_LINK_TO_DPI) += imx8qxp-pxl2dpi.o diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c new file mode 100644 index 000000000000..309f47a14cb6 --- /dev/null +++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c @@ -0,0 +1,487 @@ +// SPDX-License-Identifier: GPL-2.0+ + +/* + * Copyright 2020 NXP + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include + +#define PXL2DPI_CTRL 0x40 +#define CFG1_16BIT 0x0 +#define CFG2_16BIT 0x1 +#define CFG3_16BIT 0x2 +#define CFG1_18BIT 0x3 +#define CFG2_18BIT 0x4 +#define CFG_24BIT 0x5 + +#define DRIVER_NAME "imx8qxp-pxl2dpi" + +struct imx8qxp_pxl2dpi { + struct regmap *regmap; + struct drm_bridge bridge; + struct drm_bridge *next_bridge; + struct drm_bridge *companion; + struct device *dev; + struct imx_sc_ipc *ipc_handle; + u32 sc_resource; + u32 in_bus_format; + u32 out_bus_format; + u32 pl_sel; +}; + +#define bridge_to_p2d(b) container_of(b, struct imx8qxp_pxl2dpi, bridge) + +static int imx8qxp_pxl2dpi_bridge_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct imx8qxp_pxl2dpi *p2d = bridge->driver_private; + + if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { + DRM_DEV_ERROR(p2d->dev, + "do not support creating a drm_connector\n"); + return -EINVAL; + } + + if (!bridge->encoder) { + DRM_DEV_ERROR(p2d->dev, "missing encoder\n"); + return -ENODEV; + } + + return drm_bridge_attach(bridge->encoder, + p2d->next_bridge, bridge, + DRM_BRIDGE_ATTACH_NO_CONNECTOR); +} + +static int +imx8qxp_pxl2dpi_bridge_atomic_check(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct imx8qxp_pxl2dpi *p2d = bridge->driver_private; + + p2d->in_bus_format = bridge_state->input_bus_cfg.format; + p2d->out_bus_format = bridge_state->output_bus_cfg.format; + + return 0; +} + +static void +imx8qxp_pxl2dpi_bridge_mode_set(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + const struct drm_display_mode *adjusted_mode) +{ + struct imx8qxp_pxl2dpi *p2d = bridge->driver_private; + struct imx8qxp_pxl2dpi *companion_p2d; + int ret; + + ret = pm_runtime_get_sync(p2d->dev); + if (ret < 0) + DRM_DEV_ERROR(p2d->dev, + "failed to get runtime PM sync: %d\n", ret); + + ret = imx_sc_misc_set_control(p2d->ipc_handle, p2d->sc_resource, + IMX_SC_C_PXL_LINK_SEL, p2d->pl_sel); + if (ret) + DRM_DEV_ERROR(p2d->dev, + "failed to set pixel link selection(%u): %d\n", + p2d->pl_sel, ret); + + switch (p2d->out_bus_format) { + case MEDIA_BUS_FMT_RGB888_1X24: + regmap_write(p2d->regmap, PXL2DPI_CTRL, CFG_24BIT); + break; + case MEDIA_BUS_FMT_RGB666_1X24_CPADHI: + regmap_write(p2d->regmap, PXL2DPI_CTRL, CFG2_18BIT); + break; + default: + DRM_DEV_ERROR(p2d->dev, + "unsupported output bus format 0x%08x\n", + p2d->out_bus_format); + } + + if (p2d->companion) { + companion_p2d = bridge_to_p2d(p2d->companion); + + companion_p2d->in_bus_format = p2d->in_bus_format; + companion_p2d->out_bus_format = p2d->out_bus_format; + + p2d->companion->funcs->mode_set(p2d->companion, mode, + adjusted_mode); + } +} + +static void +imx8qxp_pxl2dpi_bridge_atomic_disable(struct drm_bridge *bridge, + struct drm_bridge_state *old_bridge_state) +{ + struct imx8qxp_pxl2dpi *p2d = bridge->driver_private; + int ret; + + ret = pm_runtime_put(p2d->dev); + if (ret < 0) + DRM_DEV_ERROR(p2d->dev, "failed to put runtime PM: %d\n", ret); + + if (p2d->companion) + p2d->companion->funcs->atomic_disable(p2d->companion, + old_bridge_state); +} + +static const u32 imx8qxp_pxl2dpi_bus_output_fmts[] = { + MEDIA_BUS_FMT_RGB888_1X24, + MEDIA_BUS_FMT_RGB666_1X24_CPADHI, +}; + +static bool imx8qxp_pxl2dpi_bus_output_fmt_supported(u32 fmt) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(imx8qxp_pxl2dpi_bus_output_fmts); i++) { + if (imx8qxp_pxl2dpi_bus_output_fmts[i] == fmt) + return true; + } + + return false; +} + +static u32 * +imx8qxp_pxl2dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state, + u32 output_fmt, + unsigned int *num_input_fmts) +{ + u32 *input_fmts; + + if (!imx8qxp_pxl2dpi_bus_output_fmt_supported(output_fmt)) + return NULL; + + *num_input_fmts = 1; + + input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL); + if (!input_fmts) + return NULL; + + switch (output_fmt) { + case MEDIA_BUS_FMT_RGB888_1X24: + input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X36_CPADLO; + break; + case MEDIA_BUS_FMT_RGB666_1X24_CPADHI: + input_fmts[0] = MEDIA_BUS_FMT_RGB666_1X36_CPADLO; + break; + default: + kfree(input_fmts); + input_fmts = NULL; + break; + } + + return input_fmts; +} + +static u32 * +imx8qxp_pxl2dpi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state, + unsigned int *num_output_fmts) +{ + *num_output_fmts = ARRAY_SIZE(imx8qxp_pxl2dpi_bus_output_fmts); + return kmemdup(imx8qxp_pxl2dpi_bus_output_fmts, + sizeof(imx8qxp_pxl2dpi_bus_output_fmts), GFP_KERNEL); +} + +static const struct drm_bridge_funcs imx8qxp_pxl2dpi_bridge_funcs = { + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, + .atomic_reset = drm_atomic_helper_bridge_reset, + .attach = imx8qxp_pxl2dpi_bridge_attach, + .atomic_check = imx8qxp_pxl2dpi_bridge_atomic_check, + .mode_set = imx8qxp_pxl2dpi_bridge_mode_set, + .atomic_disable = imx8qxp_pxl2dpi_bridge_atomic_disable, + .atomic_get_input_bus_fmts = + imx8qxp_pxl2dpi_bridge_atomic_get_input_bus_fmts, + .atomic_get_output_bus_fmts = + imx8qxp_pxl2dpi_bridge_atomic_get_output_bus_fmts, +}; + +static struct device_node * +imx8qxp_pxl2dpi_get_available_ep_from_port(struct imx8qxp_pxl2dpi *p2d, + u32 port_id) +{ + struct device_node *port, *ep; + int ep_cnt; + + port = of_graph_get_port_by_id(p2d->dev->of_node, port_id); + if (!port) { + DRM_DEV_ERROR(p2d->dev, "failed to get port@%u\n", port_id); + return ERR_PTR(-ENODEV); + } + + ep_cnt = of_get_available_child_count(port); + if (ep_cnt == 0) { + DRM_DEV_ERROR(p2d->dev, "no available endpoints of port@%u\n", + port_id); + ep = ERR_PTR(-ENODEV); + goto out; + } else if (ep_cnt > 1) { + DRM_DEV_ERROR(p2d->dev, + "invalid available endpoints of port@%u\n", + port_id); + ep = ERR_PTR(-EINVAL); + goto out; + } + + ep = of_get_next_available_child(port, NULL); + if (!ep) { + DRM_DEV_ERROR(p2d->dev, + "failed to get available endpoint of port@%u\n", + port_id); + ep = ERR_PTR(-ENODEV); + goto out; + } +out: + of_node_put(port); + return ep; +} + +static struct drm_bridge * +imx8qxp_pxl2dpi_find_next_bridge(struct imx8qxp_pxl2dpi *p2d) +{ + struct device_node *ep, *remote; + struct drm_bridge *next_bridge; + int ret; + + ep = imx8qxp_pxl2dpi_get_available_ep_from_port(p2d, 1); + if (IS_ERR(ep)) { + ret = PTR_ERR(ep); + return ERR_PTR(ret); + } + + remote = of_graph_get_remote_port_parent(ep); + if (!remote || !of_device_is_available(remote)) { + DRM_DEV_ERROR(p2d->dev, "no available remote\n"); + next_bridge = ERR_PTR(-ENODEV); + goto out; + } else if (!of_device_is_available(remote->parent)) { + DRM_DEV_ERROR(p2d->dev, "remote parent is not available\n"); + next_bridge = ERR_PTR(-ENODEV); + goto out; + } + + next_bridge = of_drm_find_bridge(remote); + if (!next_bridge) { + next_bridge = ERR_PTR(-EPROBE_DEFER); + goto out; + } +out: + of_node_put(remote); + of_node_put(ep); + + return next_bridge; +} + +static int imx8qxp_pxl2dpi_set_pixel_link_sel(struct imx8qxp_pxl2dpi *p2d) +{ + struct device_node *ep; + struct of_endpoint endpoint; + int ret; + + ep = imx8qxp_pxl2dpi_get_available_ep_from_port(p2d, 0); + if (IS_ERR(ep)) + return PTR_ERR(ep); + + ret = of_graph_parse_endpoint(ep, &endpoint); + if (ret) { + DRM_DEV_ERROR(p2d->dev, + "failed to parse endpoint of port@0: %d\n", ret); + goto out; + } + + p2d->pl_sel = endpoint.id; +out: + of_node_put(ep); + + return ret; +} + +static int imx8qxp_pxl2dpi_parse_dt_companion(struct imx8qxp_pxl2dpi *p2d) +{ + struct imx8qxp_pxl2dpi *companion_p2d; + struct device *dev = p2d->dev; + struct device_node *companion; + struct device_node *port1, *port2; + const struct of_device_id *match; + int dual_link; + int ret = 0; + + /* Locate the companion PXL2DPI for dual-link operation, if any. */ + companion = of_parse_phandle(dev->of_node, "fsl,companion-pxl2dpi", 0); + if (!companion) + return 0; + + if (!of_device_is_available(companion)) { + DRM_DEV_ERROR(dev, "companion PXL2DPI is not available\n"); + ret = -ENODEV; + goto out; + } + + /* + * Sanity check: the companion bridge must have the same compatible + * string. + */ + match = of_match_device(dev->driver->of_match_table, dev); + if (!of_device_is_compatible(companion, match->compatible)) { + DRM_DEV_ERROR(dev, "companion PXL2DPI is incompatible\n"); + ret = -ENXIO; + goto out; + } + + p2d->companion = of_drm_find_bridge(companion); + if (!p2d->companion) { + ret = -EPROBE_DEFER; + DRM_DEV_DEBUG_DRIVER(p2d->dev, + "failed to find companion bridge: %d\n", + ret); + goto out; + } + + companion_p2d = bridge_to_p2d(p2d->companion); + + /* + * We need to work out if the sink is expecting us to function in + * dual-link mode. We do this by looking at the DT port nodes that + * the next bridges are connected to. If they are marked as expecting + * even pixels and odd pixels than we need to use the companion PXL2DPI. + */ + port1 = of_graph_get_port_by_id(p2d->next_bridge->of_node, 1); + port2 = of_graph_get_port_by_id(companion_p2d->next_bridge->of_node, 1); + dual_link = drm_of_lvds_get_dual_link_pixel_order(port1, port2); + of_node_put(port1); + of_node_put(port2); + + if (dual_link < 0) { + ret = dual_link; + DRM_DEV_ERROR(dev, "failed to get dual link pixel order: %d\n", + ret); + goto out; + } + + DRM_DEV_DEBUG_DRIVER(dev, + "dual-link configuration detected (companion bridge %pOF)\n", + companion); +out: + of_node_put(companion); + return ret; +} + +static int imx8qxp_pxl2dpi_bridge_probe(struct platform_device *pdev) +{ + struct imx8qxp_pxl2dpi *p2d; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + int ret; + + p2d = devm_kzalloc(dev, sizeof(*p2d), GFP_KERNEL); + if (!p2d) + return -ENOMEM; + + p2d->regmap = syscon_node_to_regmap(np->parent); + if (IS_ERR(p2d->regmap)) { + ret = PTR_ERR(p2d->regmap); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "failed to get regmap: %d\n", ret); + return ret; + } + + ret = imx_scu_get_handle(&p2d->ipc_handle); + if (ret) { + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "failed to get SCU ipc handle: %d\n", + ret); + return ret; + } + + p2d->dev = dev; + + ret = of_property_read_u32(np, "fsl,sc-resource", &p2d->sc_resource); + if (ret) { + DRM_DEV_ERROR(dev, "failed to get SC resource %d\n", ret); + return ret; + } + + p2d->next_bridge = imx8qxp_pxl2dpi_find_next_bridge(p2d); + if (IS_ERR(p2d->next_bridge)) { + ret = PTR_ERR(p2d->next_bridge); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "failed to find next bridge: %d\n", + ret); + return ret; + } + + ret = imx8qxp_pxl2dpi_set_pixel_link_sel(p2d); + if (ret) + return ret; + + ret = imx8qxp_pxl2dpi_parse_dt_companion(p2d); + if (ret) + return ret; + + platform_set_drvdata(pdev, p2d); + pm_runtime_enable(dev); + + p2d->bridge.driver_private = p2d; + p2d->bridge.funcs = &imx8qxp_pxl2dpi_bridge_funcs; + p2d->bridge.of_node = np; + + drm_bridge_add(&p2d->bridge); + + return ret; +} + +static int imx8qxp_pxl2dpi_bridge_remove(struct platform_device *pdev) +{ + struct imx8qxp_pxl2dpi *p2d = platform_get_drvdata(pdev); + + drm_bridge_remove(&p2d->bridge); + + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static const struct of_device_id imx8qxp_pxl2dpi_dt_ids[] = { + { .compatible = "fsl,imx8qxp-pxl2dpi", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, imx8qxp_pxl2dpi_dt_ids); + +static struct platform_driver imx8qxp_pxl2dpi_bridge_driver = { + .probe = imx8qxp_pxl2dpi_bridge_probe, + .remove = imx8qxp_pxl2dpi_bridge_remove, + .driver = { + .of_match_table = imx8qxp_pxl2dpi_dt_ids, + .name = DRIVER_NAME, + }, +}; +module_platform_driver(imx8qxp_pxl2dpi_bridge_driver); + +MODULE_DESCRIPTION("i.MX8QXP pixel link to DPI bridge driver"); +MODULE_AUTHOR("Liu Ying "); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRIVER_NAME);