From mboxrd@z Thu Jan 1 00:00:00 1970 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 F35C6C433E6 for ; Wed, 3 Mar 2021 18:52:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A83BF64EE6 for ; Wed, 3 Mar 2021 18:52:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243494AbhCCSLm (ORCPT ); Wed, 3 Mar 2021 13:11:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48884 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1383825AbhCCPfI (ORCPT ); Wed, 3 Mar 2021 10:35:08 -0500 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A21A9C061761 for ; Wed, 3 Mar 2021 07:34:26 -0800 (PST) Received: by mail-pl1-x62d.google.com with SMTP id p5so14237822plo.4 for ; Wed, 03 Mar 2021 07:34:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=3W37d8NL+JLJhVV482HENox8UGgz8AoMWF0DFz7r5hE=; b=mj7Fm5z7emedl4PYbFIYbtHcasrpdVQ+CDf8fsaoZsvF2bIRDzPejJAW9254iw6QYI pCNIPwP57H6cEAKyXr3KAfZTrb4tLwZyQfPykr08z3rBrHaXcIeEi6wYnxZtF2nXLNxA Wy4sOyZVrRxDmgFloTMgkMT8YZVqwVzBP4mpV7RnA5T96rrobqHWAdstSAJqAFXu6Fpm a2jh6zu5aNEAK1w8FHke+6B5xfSKQtNhy+QVvJV4aE4l/PTz4KTk8UWLQl91rkVgqv9t zhQXpGnCDaF6rE97dseFTrAIM2wYzaydH9YWTPrgyP1Q2YVOG8foAdqb51nyOE2WFOkT UwZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=3W37d8NL+JLJhVV482HENox8UGgz8AoMWF0DFz7r5hE=; b=HrQRbkxcxeWNEV1wPmOf/P5VCJ90KtHQx5u7JY+3MhjKxxnM5on8xE48tsfybjLvpP dcsFcfXXT7QMfZ+zpByfJlvvHPcGV6L+LG3G+rlsRJqYiq6gyXXKuAGnyFEnMDyNPVeg AKexXkVr2iLJaAvN6g9FxF2Ob0o9JGgcjXORQsMCyfXYfE9kCC9XzVPiPBqtG2NOq3P3 fvS2heRN9ntfDB9ee1Js53Fvs50+LcVhwMv5WUGanLsMcRK3j+tFpRl6nj54Hf2CO3+l KEWVYtbIrqLkSX9R1LCTBkFg+ob6AxsR/+czXFIi0hVMzVTi6mtRYwsDZoN7hGHPEySw P8VQ== X-Gm-Message-State: AOAM531JlhDThbuA3jWkLPmbAuIDjf+31BHRkjqBKhDpftd9z2xsJ7iT Fm0/lqWq/kAqS+fEwfI4ceP8JmiGFWRCX+0rBAMf9g== X-Google-Smtp-Source: ABdhPJy4rrvpdgPyQjjpBkm5OvT2TPc3Ubzc7QE70H48ElOku/Xab4u148S/RRofrNNVX1k22bFtYtegWLswpw+q6bs= X-Received: by 2002:a17:902:f68a:b029:e5:b17f:9154 with SMTP id l10-20020a170902f68ab02900e5b17f9154mr8825880plg.28.1614785665986; Wed, 03 Mar 2021 07:34:25 -0800 (PST) MIME-Version: 1.0 References: <1613619715-28785-1-git-send-email-victor.liu@nxp.com> <1613619715-28785-11-git-send-email-victor.liu@nxp.com> <9c437b07a47b14c47f65ac58f6cf9bc95edab169.camel@nxp.com> In-Reply-To: <9c437b07a47b14c47f65ac58f6cf9bc95edab169.camel@nxp.com> From: Robert Foss Date: Wed, 3 Mar 2021 16:34:14 +0100 Message-ID: Subject: Re: [PATCH v4 10/14] drm/bridge: imx: Add LDB driver helper support To: Liu Ying Cc: dri-devel , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" , linux-kernel , linux-media , David Airlie , Daniel Vetter , Rob Herring , shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, Fabio Estevam , linux-imx@nxp.com, Mauro Carvalho Chehab , Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , kishon@ti.com, Vinod Koul Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 3 Mar 2021 at 08:23, Liu Ying wrote: > > Hi Robert, > > On Tue, 2021-03-02 at 15:22 +0100, Robert Foss wrote: > > Hey Liu, > > > > Thanks for submitting this patch. > > Thanks for reviewing this patch. > > > > > On Thu, 18 Feb 2021 at 04:59, Liu Ying wrote: > > > 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 > > > --- > > > v3->v4: > > > * No change. > > > > > > 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"); > > > > I'm not entirely sure why this set of helper functions should be a > > module. It's not a driver, but rather a toolbox for the LDB driver, > > which is fine, but there is no situation I can see where this module > > would be unloaded and the LDB driver would be loaded. > > I can see drivers/gpu/drm/drm_mipi_dbi.c is also a module and > essentially provides helpers to MIPI DBI drivers, but it is not a > driver. I don't see this imx-ldb-helper can be anything else other > than a module. > > Or, do you mean that imx-ldb-helper should be only built-in? My thinking was that it should just be linked together with the rest of the imx8qxp-ldb driver. But this ties in to my next comment. > > > > > > 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 > > > > This header is specific to this driver, and I would expect it to not > > be useful to other drivers. Additionally the filename has a different > > format than the .c file it corresponds to. I would change the name and > > path to "drivers/gpu/drm/bridge/imx/imx-ldb-helper.h". > > The i.MX53/6qdl LDB driver(drivers/gpu/drm/imx/imx-ldb.c) can > potentially use this header, but it's a DRM encoder driver. > So, maybe, it's a good idea to move this header to the 'drivers' folder > and rename it to 'imx-ldb-helper.h' ofc. If no objections, I'll do as > what you're suggesting here in the next version. Ah I see. If ldb-helper is indeed used by two drivers, making it a module seems reasonable. I think we have two options then. #1 Make imx-ldb-helper an object that is just linked with the imx8qxp-ldb driver. #2 Keep imx-ldb-helper as a module, and implement support for using it in the imx-ldb driver. Ideally I'd like to see the imx-ldb-helper module patch in the same series as as imx53/6qdl switching to using the module. These things have a tendency of not happening if not done right away :) > > Regards, > Liu Ying > > > > > > @@ -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__ */ > > > -- > > > 2.7.4 > > > >