From patchwork Wed Jan 27 08:51:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liu Ying X-Patchwork-Id: 12049421 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CF759C433DB for ; Wed, 27 Jan 2021 09:09:07 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6874020756 for ; Wed, 27 Jan 2021 09:09:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6874020756 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nxp.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=H1NY0sIztV106e5pKkZDZKajvKJwxd2FsdI2ZXyzEc0=; b=K9gExug4ShOdPrcTfN+0K9aiJ 0oHfNJajDV7ZMPOU9N30M7L61DNLoc1AJlDFyBtRcQYUn5pYeXwkLAwyAPtGR3jgtil+p0C4ZP3to EEYumXnZ132mNKPs6Ln09qgsHdtXRkYeq0mLor85mb9vyMVvUaEzDjIJDADQktBXvslmAJferdmWc kC2OL4iX4yQ08JPPfRlT9lP8MRP/cCa9z/NkQzr4Qzm27Lghd/7itfV1P2gIvRddh92KNV2fqauIF usdc4XuQvJ1slATUBxeRzTQzgtwTkm+Owr4e/WCvT1RRvhQ9+WInWoOxCnzM2Gl3gmjPUkAKqICzm NzTgDgojg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l4gma-0004gA-4u; Wed, 27 Jan 2021 09:06:36 +0000 Received: from mail-vi1eur05on2062.outbound.protection.outlook.com ([40.107.21.62] helo=EUR05-VI1-obe.outbound.protection.outlook.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l4gkm-0002yL-8Z for linux-arm-kernel@lists.infradead.org; Wed, 27 Jan 2021 09:04:59 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=irHlVybcRM2QdYadz9N0/J1Tko3NGNronk2l5qaWVdFYX9myJBkXSVlwnuosux6ddgnc9A7uFdZYFTVvY5VOZW7TubG7krY6OMkaP16QoASmobQXCG2WO/O7RmkDwHz7MFIBKuijlTgJmzdoKppxSv+4jjcpKkyGwyl4Pn+Y6FvnPhACskobWXo39CRtMLxJnOpApOyW2mTz8/yrRnvwzgSsizW1fFmX2IQ1qajnt3t11SK0v+8VC5Heg0zliZkDteomYQ2DYSJ+uDzA8J9atz8NpYOD7Vny/lABf+ZRzTNnMOebDmw2YIFy5HyT2YwvwdPaL9ri5xhaiFU4Kh8VoA== 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-SenderADCheck; bh=EA0LVl/u2vag/nj1oDsiDQJ8w8S04RA2sF/NIu2uj+U=; b=O1iXSz/IAo9w000rh6loH/AGtv3K0Ae2mpFSL1nvU7FZE+qbR9rL0utJ0DFHT8Ys3nMnITdbKgEqmudRlx+ZPt2uSEMP8WcCo2iuW6c/nOOytBjInzroOmg1ruNvu6QgjRDhez66eldZlOddsmJM5K/PPaUlUE/Exv4jHExRCvxncrOD8mejiMWy340IdACuB/TuOpF68iO1rwelwrlWNIJsNqDNqUdJmZ3tNMkgwfpzgIzJ2sobMJUWdHjwICj7JhcUuLcZTWbg/noeSc2AXUTPIuj0WCdxXIognIJel7nC4q79RgApHogyfGjzHBEYt+tDZAtK1BCN3jcNWmQfWA== 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=EA0LVl/u2vag/nj1oDsiDQJ8w8S04RA2sF/NIu2uj+U=; b=H5v/hbrXgt0/FDfsMgK2edeKCvtqdyYis4vSrv01NiTG+LA8TE7annHRhRgbufY3FndtcWOgus/DvDrSTIegCuxHM/teDspmdVnAoiz53yDrfigsLeLBolJ2+64gQLQbk0dimPUnYWIYlHIpJhzYIh/cr70qwvQ3zEqnA5+iDL4= Authentication-Results: lists.freedesktop.org; dkim=none (message not signed) header.d=none; lists.freedesktop.org; dmarc=none action=none header.from=nxp.com; Received: from VI1PR04MB3983.eurprd04.prod.outlook.com (2603:10a6:803:4c::16) by VI1PR04MB2975.eurprd04.prod.outlook.com (2603:10a6:802:9::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3784.13; Wed, 27 Jan 2021 09:03:23 +0000 Received: from VI1PR04MB3983.eurprd04.prod.outlook.com ([fe80::2564:cacc:2da5:52d0]) by VI1PR04MB3983.eurprd04.prod.outlook.com ([fe80::2564:cacc:2da5:52d0%5]) with mapi id 15.20.3805.016; Wed, 27 Jan 2021 09:03:23 +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 Subject: [PATCH v3 10/14] drm/bridge: imx: Add LDB driver helper support Date: Wed, 27 Jan 2021 16:51:24 +0800 Message-Id: <1611737488-2791-11-git-send-email-victor.liu@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1611737488-2791-1-git-send-email-victor.liu@nxp.com> References: <1611737488-2791-1-git-send-email-victor.liu@nxp.com> X-Originating-IP: [119.31.174.66] X-ClientProxiedBy: SG2PR02CA0049.apcprd02.prod.outlook.com (2603:1096:4:54::13) To VI1PR04MB3983.eurprd04.prod.outlook.com (2603:10a6:803:4c::16) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (119.31.174.66) by SG2PR02CA0049.apcprd02.prod.outlook.com (2603:1096:4:54::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.3805.16 via Frontend Transport; Wed, 27 Jan 2021 09:03:17 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 94035f33-0250-4a6b-d3e5-08d8c2a26647 X-MS-TrafficTypeDiagnostic: VI1PR04MB2975: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6430; X-MS-Exchange-SenderADCheck: 1 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:VI1PR04MB3983.eurprd04.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(376002)(366004)(346002)(39860400002)(136003)(396003)(8936002)(2616005)(6486002)(66946007)(186003)(6666004)(956004)(7416002)(4326008)(36756003)(69590400011)(6506007)(8676002)(316002)(5660300002)(16526019)(86362001)(478600001)(30864003)(6512007)(2906002)(52116002)(66556008)(26005)(66476007); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 94035f33-0250-4a6b-d3e5-08d8c2a26647 X-MS-Exchange-CrossTenant-AuthSource: VI1PR04MB3983.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Jan 2021 09:03:23.3916 (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: Ap/u33t8Tuo8edvfBmsBjiifw+A9D8N98MiWODaa3kj6AopY2hi+slS/V29jLMFF/Jqy5h8TYxUsxihi5rdlfw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB2975 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210127_040444_355155_CCF5A8E6 X-CRM114-Status: GOOD ( 26.49 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jernej.skrabec@siol.net, daniel@ffwll.ch, narmstrong@baylibre.com, airlied@linux.ie, festevam@gmail.com, s.hauer@pengutronix.de, jonas@kwiboo.se, kishon@ti.com, a.hajda@samsung.com, vkoul@kernel.org, robh+dt@kernel.org, linux-imx@nxp.com, kernel@pengutronix.de, mchehab@kernel.org, shawnguo@kernel.org, Laurent.pinchart@ideasonboard.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This patch adds a helper to support LDB drm bridge drivers for i.MX SoCs. Helper functions exported from this driver should implement common logics for all LDB modules embedded in i.MX SoCs. Signed-off-by: Liu Ying --- v2->v3: * Call syscon_node_to_regmap() to get regmap instead of syscon_regmap_lookup_by_phandle(). v1->v2: * No change. drivers/gpu/drm/bridge/imx/Kconfig | 8 + drivers/gpu/drm/bridge/imx/Makefile | 1 + drivers/gpu/drm/bridge/imx/imx-ldb-helper.c | 248 ++++++++++++++++++++++++++++ include/drm/bridge/imx_ldb_helper.h | 98 +++++++++++ 4 files changed, 355 insertions(+) create mode 100644 drivers/gpu/drm/bridge/imx/imx-ldb-helper.c create mode 100644 include/drm/bridge/imx_ldb_helper.h diff --git a/drivers/gpu/drm/bridge/imx/Kconfig b/drivers/gpu/drm/bridge/imx/Kconfig index 1ea1ce7..23e24fd 100644 --- a/drivers/gpu/drm/bridge/imx/Kconfig +++ b/drivers/gpu/drm/bridge/imx/Kconfig @@ -1,3 +1,11 @@ +config DRM_IMX_LVDS_BRIDGE_HELPER + tristate "Freescale i.MX LVDS display bridge helper" + depends on OF + select DRM_PANEL_BRIDGE + help + Helper to support Freescale i.MX LVDS Display Bridge(LDB). + This bridge is embedded in a SoC. + config DRM_IMX8QXP_PIXEL_COMBINER tristate "Freescale i.MX8QM/QXP pixel combiner" depends on OF diff --git a/drivers/gpu/drm/bridge/imx/Makefile b/drivers/gpu/drm/bridge/imx/Makefile index e74dd64..902b703 100644 --- a/drivers/gpu/drm/bridge/imx/Makefile +++ b/drivers/gpu/drm/bridge/imx/Makefile @@ -1,3 +1,4 @@ +obj-$(CONFIG_DRM_IMX_LVDS_BRIDGE_HELPER) += imx-ldb-helper.o obj-$(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/imx-ldb-helper.c b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c new file mode 100644 index 00000000..94d7f9e --- /dev/null +++ b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c @@ -0,0 +1,248 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2012 Sascha Hauer, Pengutronix + * Copyright 2019,2020 NXP + */ + +#include +#include +#include +#include + +#include +#include +#include +#include + +bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch) +{ + return ldb_ch->link_type == LDB_CH_SINGLE_LINK; +} +EXPORT_SYMBOL_GPL(ldb_channel_is_single_link); + +bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch) +{ + return ldb_ch->link_type == LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS || + ldb_ch->link_type == LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS; +} +EXPORT_SYMBOL_GPL(ldb_channel_is_split_link); + +int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct ldb_channel *ldb_ch = bridge->driver_private; + + ldb_ch->in_bus_format = bridge_state->input_bus_cfg.format; + ldb_ch->out_bus_format = bridge_state->output_bus_cfg.format; + + return 0; +} +EXPORT_SYMBOL_GPL(ldb_bridge_atomic_check_helper); + +void ldb_bridge_mode_set_helper(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + const struct drm_display_mode *adjusted_mode) +{ + struct ldb_channel *ldb_ch = bridge->driver_private; + struct ldb *ldb = ldb_ch->ldb; + bool is_split = ldb_channel_is_split_link(ldb_ch); + + if (is_split) + ldb->ldb_ctrl |= LDB_SPLIT_MODE_EN; + + switch (ldb_ch->out_bus_format) { + case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG: + break; + case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG: + if (ldb_ch->chno == 0 || is_split) + ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24; + if (ldb_ch->chno == 1 || is_split) + ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24; + break; + case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA: + if (ldb_ch->chno == 0 || is_split) + ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24 | + LDB_BIT_MAP_CH0_JEIDA; + if (ldb_ch->chno == 1 || is_split) + ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24 | + LDB_BIT_MAP_CH1_JEIDA; + break; + } +} +EXPORT_SYMBOL_GPL(ldb_bridge_mode_set_helper); + +void ldb_bridge_enable_helper(struct drm_bridge *bridge) +{ + struct ldb_channel *ldb_ch = bridge->driver_private; + struct ldb *ldb = ldb_ch->ldb; + + /* + * Platform specific bridge drivers should set ldb_ctrl properly + * for the enablement, so just write the ctrl_reg here. + */ + regmap_write(ldb->regmap, ldb->ctrl_reg, ldb->ldb_ctrl); +} +EXPORT_SYMBOL_GPL(ldb_bridge_enable_helper); + +void ldb_bridge_disable_helper(struct drm_bridge *bridge) +{ + struct ldb_channel *ldb_ch = bridge->driver_private; + struct ldb *ldb = ldb_ch->ldb; + bool is_split = ldb_channel_is_split_link(ldb_ch); + + if (ldb_ch->chno == 0 || is_split) + ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK; + if (ldb_ch->chno == 1 || is_split) + ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK; + + regmap_write(ldb->regmap, ldb->ctrl_reg, ldb->ldb_ctrl); +} +EXPORT_SYMBOL_GPL(ldb_bridge_disable_helper); + +int ldb_bridge_attach_helper(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct ldb_channel *ldb_ch = bridge->driver_private; + struct ldb *ldb = ldb_ch->ldb; + + if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { + DRM_DEV_ERROR(ldb->dev, + "do not support creating a drm_connector\n"); + return -EINVAL; + } + + if (!bridge->encoder) { + DRM_DEV_ERROR(ldb->dev, "missing encoder\n"); + return -ENODEV; + } + + return drm_bridge_attach(bridge->encoder, + ldb_ch->next_bridge, bridge, + DRM_BRIDGE_ATTACH_NO_CONNECTOR); +} +EXPORT_SYMBOL_GPL(ldb_bridge_attach_helper); + +int ldb_init_helper(struct ldb *ldb) +{ + struct device *dev = ldb->dev; + struct device_node *np = dev->of_node; + struct device_node *child; + int ret; + u32 i; + + ldb->regmap = syscon_node_to_regmap(np->parent); + if (IS_ERR(ldb->regmap)) { + ret = PTR_ERR(ldb->regmap); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "failed to get regmap: %d\n", ret); + return ret; + } + + for_each_available_child_of_node(np, child) { + struct ldb_channel *ldb_ch; + + ret = of_property_read_u32(child, "reg", &i); + if (ret || i > MAX_LDB_CHAN_NUM - 1) { + ret = -EINVAL; + DRM_DEV_ERROR(dev, + "invalid channel node address: %u\n", i); + of_node_put(child); + return ret; + } + + ldb_ch = ldb->channel[i]; + ldb_ch->ldb = ldb; + ldb_ch->chno = i; + ldb_ch->is_available = true; + ldb_ch->np = child; + + ldb->available_ch_cnt++; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ldb_init_helper); + +int ldb_find_next_bridge_helper(struct ldb *ldb) +{ + struct device *dev = ldb->dev; + struct ldb_channel *ldb_ch; + int ret, i; + + for (i = 0; i < MAX_LDB_CHAN_NUM; i++) { + ldb_ch = ldb->channel[i]; + + if (!ldb_ch->is_available) + continue; + + ret = drm_of_find_panel_or_bridge(ldb_ch->np, 1, 0, + &ldb_ch->panel, + &ldb_ch->next_bridge); + if (ret) { + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, + "failed to find panel or bridge: %d\n", + ret); + return ret; + } + + if (ldb_ch->panel) { + ldb_ch->next_bridge = devm_drm_panel_bridge_add(dev, + ldb_ch->panel); + if (IS_ERR(ldb_ch->next_bridge)) { + ret = PTR_ERR(ldb_ch->next_bridge); + DRM_DEV_ERROR(dev, + "failed to add panel bridge: %d\n", + ret); + return ret; + } + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(ldb_find_next_bridge_helper); + +void ldb_add_bridge_helper(struct ldb *ldb, + const struct drm_bridge_funcs *bridge_funcs) +{ + struct ldb_channel *ldb_ch; + int i; + + for (i = 0; i < MAX_LDB_CHAN_NUM; i++) { + ldb_ch = ldb->channel[i]; + + if (!ldb_ch->is_available) + continue; + + ldb_ch->bridge.driver_private = ldb_ch; + ldb_ch->bridge.funcs = bridge_funcs; + ldb_ch->bridge.of_node = ldb_ch->np; + + drm_bridge_add(&ldb_ch->bridge); + } +} +EXPORT_SYMBOL_GPL(ldb_add_bridge_helper); + +void ldb_remove_bridge_helper(struct ldb *ldb) +{ + struct ldb_channel *ldb_ch; + int i; + + for (i = 0; i < MAX_LDB_CHAN_NUM; i++) { + ldb_ch = ldb->channel[i]; + + if (!ldb_ch->is_available) + continue; + + drm_bridge_remove(&ldb_ch->bridge); + } +} +EXPORT_SYMBOL_GPL(ldb_remove_bridge_helper); + +MODULE_DESCRIPTION("Freescale i.MX LVDS Display Bridge driver helper"); +MODULE_AUTHOR("Liu Ying "); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:imx-ldb-helper"); diff --git a/include/drm/bridge/imx_ldb_helper.h b/include/drm/bridge/imx_ldb_helper.h new file mode 100644 index 00000000..2a7ba97 --- /dev/null +++ b/include/drm/bridge/imx_ldb_helper.h @@ -0,0 +1,98 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ + +/* + * Copyright 2019,2020 NXP + */ + +#ifndef __FSL_IMX_LDB__ +#define __FSL_IMX_LDB__ + +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#define LDB_CH0_MODE_EN_TO_DI0 (1 << 0) +#define LDB_CH0_MODE_EN_TO_DI1 (3 << 0) +#define LDB_CH0_MODE_EN_MASK (3 << 0) +#define LDB_CH1_MODE_EN_TO_DI0 (1 << 2) +#define LDB_CH1_MODE_EN_TO_DI1 (3 << 2) +#define LDB_CH1_MODE_EN_MASK (3 << 2) +#define LDB_SPLIT_MODE_EN (1 << 4) +#define LDB_DATA_WIDTH_CH0_24 (1 << 5) +#define LDB_BIT_MAP_CH0_JEIDA (1 << 6) +#define LDB_DATA_WIDTH_CH1_24 (1 << 7) +#define LDB_BIT_MAP_CH1_JEIDA (1 << 8) +#define LDB_DI0_VS_POL_ACT_LOW (1 << 9) +#define LDB_DI1_VS_POL_ACT_LOW (1 << 10) + +#define MAX_LDB_CHAN_NUM 2 + +enum ldb_channel_link_type { + LDB_CH_SINGLE_LINK, + LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS, + LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS, +}; + +struct ldb; + +struct ldb_channel { + struct ldb *ldb; + struct drm_bridge bridge; + struct drm_panel *panel; + struct drm_bridge *next_bridge; + struct device_node *np; + u32 chno; + bool is_available; + u32 in_bus_format; + u32 out_bus_format; + enum ldb_channel_link_type link_type; +}; + +struct ldb { + struct regmap *regmap; + struct device *dev; + struct ldb_channel *channel[MAX_LDB_CHAN_NUM]; + unsigned int ctrl_reg; + u32 ldb_ctrl; + unsigned int available_ch_cnt; +}; + +#define bridge_to_ldb_ch(b) container_of(b, struct ldb_channel, bridge) + +bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch); +bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch); + +int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state); + +void ldb_bridge_mode_set_helper(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + const struct drm_display_mode *adjusted_mode); + +void ldb_bridge_enable_helper(struct drm_bridge *bridge); + +void ldb_bridge_disable_helper(struct drm_bridge *bridge); + +int ldb_bridge_attach_helper(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags); + +int ldb_init_helper(struct ldb *ldb); + +int ldb_find_next_bridge_helper(struct ldb *ldb); + +void ldb_add_bridge_helper(struct ldb *ldb, + const struct drm_bridge_funcs *bridge_funcs); + +void ldb_remove_bridge_helper(struct ldb *ldb); + +#endif /* __FSL_IMX_LDB__ */