From patchwork Fri Aug 30 15:25:19 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thierry Reding X-Patchwork-Id: 2852131 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id A48EDC0AB5 for ; Fri, 30 Aug 2013 15:32:49 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CA85320549 for ; Fri, 30 Aug 2013 15:32:44 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 51E9C2053F for ; Fri, 30 Aug 2013 15:32:43 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5BB5CE7867 for ; Fri, 30 Aug 2013 08:32:43 -0700 (PDT) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-ea0-f172.google.com (mail-ea0-f172.google.com [209.85.215.172]) by gabe.freedesktop.org (Postfix) with ESMTP id 0C21DE61E8 for ; Fri, 30 Aug 2013 08:26:01 -0700 (PDT) Received: by mail-ea0-f172.google.com with SMTP id r16so1007253ead.31 for ; Fri, 30 Aug 2013 08:26:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=t/fdKwFDOvF6kNl9hHVDhcVTtwBTu4QXJ4/RNS+30f0=; b=xMfBvmUvk83VQ7nV1MaSIIamFJh5b3bhjf5HnEFVF94EY7ijCEDT6Xeq11QDpsiBMb xAUlh03aBCfmX/Bd5A8rVA/B3A//Xlv76fxc4HMWut7wBffTUxb5KjwY1wWs1p3J+jOp XG9yYJ/BIrNf+SB7MjHTEVAb1/ReIC5iUhAnBMQsu+kppETk0uq6hm3Trx61yj0xzlss mdI4zpIQqU595wt1iyWF8SuhPBbVb+/CRr0gkvsiXRIYLgXYV+6ImF7ubFU5XkR0BUEl eUEVaAYfSCGTewkACclaisigtdxDrYiIashfjrYf9avGOjWQcDfYPlBsN8nJlUw5vUyC Wr7g== X-Received: by 10.14.115.133 with SMTP id e5mr13658571eeh.27.1377876361117; Fri, 30 Aug 2013 08:26:01 -0700 (PDT) Received: from localhost (port-55871.pppoe.wtnet.de. [46.59.218.242]) by mx.google.com with ESMTPSA id d8sm55550520eeh.8.1969.12.31.16.00.00 (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Fri, 30 Aug 2013 08:26:00 -0700 (PDT) From: Thierry Reding To: dri-devel@lists.freedesktop.org Subject: [RFC 1/3] drm: Add panel support Date: Fri, 30 Aug 2013 17:25:19 +0200 Message-Id: <1377876321-26835-2-git-send-email-treding@nvidia.com> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1377876321-26835-1-git-send-email-treding@nvidia.com> References: <1377876321-26835-1-git-send-email-treding@nvidia.com> Cc: linux-tegra@vger.kernel.org, devicetree@vger.kernel.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org Errors-To: dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org X-Spam-Status: No, score=-6.2 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a very simple framework to register and lookup panels. Panel drivers can initialize a DRM panel and register it with the framework, allowing them to be retrieved and used by display drivers. Currently only support for DPMS and obtaining panel modes is provided. However it should be sufficient to enable a large number of panels. The framework should also be easily extensible to support more sophisticated kinds of panels such as DSI. The framework hasn't been tied into the DRM core, even though it should be easily possible to do so if that's what we want. In the current implementation, display drivers can simple make use of it to retrieve a panel, obtain its modes and control its DPMS mode. Note that this is currently only tested on systems that boot from a device tree. No glue code has been written yet for systems that use platform data, but it should be easy to add. Signed-off-by: Thierry Reding --- drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/drm_panel.c | 96 +++++++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/panel/Kconfig | 4 ++ include/drm/drm_panel.h | 65 +++++++++++++++++++++++++++++ 5 files changed, 168 insertions(+) create mode 100644 drivers/gpu/drm/drm_panel.c create mode 100644 drivers/gpu/drm/panel/Kconfig create mode 100644 include/drm/drm_panel.h diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 955555d..b4d8402 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -236,3 +236,5 @@ source "drivers/gpu/drm/tilcdc/Kconfig" source "drivers/gpu/drm/qxl/Kconfig" source "drivers/gpu/drm/msm/Kconfig" + +source "drivers/gpu/drm/panel/Kconfig" diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index f089adf..9b009c7 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -18,6 +18,7 @@ drm-y := drm_auth.o drm_buffer.o drm_bufs.o drm_cache.o \ drm-$(CONFIG_COMPAT) += drm_ioc32.o drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o drm-$(CONFIG_PCI) += ati_pcigart.o +drm-$(CONFIG_DRM_PANEL) += drm_panel.o drm-usb-y := drm_usb.o diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c new file mode 100644 index 0000000..ff6e459 --- /dev/null +++ b/drivers/gpu/drm/drm_panel.c @@ -0,0 +1,96 @@ +/* + * Copyright (C) 2013, NVIDIA Corporation. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sub license, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include +#include + +#include +#include + +static DEFINE_MUTEX(panel_lock); +static LIST_HEAD(panel_list); + +void drm_panel_init(struct drm_panel *panel) +{ + INIT_LIST_HEAD(&panel->list); +} +EXPORT_SYMBOL(drm_panel_init); + +int drm_panel_add(struct drm_panel *panel) +{ + mutex_lock(&panel_lock); + list_add_tail(&panel->list, &panel_list); + mutex_unlock(&panel_lock); + + return 0; +} +EXPORT_SYMBOL(drm_panel_add); + +void drm_panel_remove(struct drm_panel *panel) +{ + mutex_lock(&panel_lock); + list_del_init(&panel->list); + mutex_unlock(&panel_lock); +} +EXPORT_SYMBOL(drm_panel_remove); + +int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector) +{ + if (panel->connector) + return -EBUSY; + + panel->connector = connector; + panel->drm = connector->dev; + + return 0; +} +EXPORT_SYMBOL(drm_panel_attach); + +int drm_panel_detach(struct drm_panel *panel) +{ + panel->connector = NULL; + panel->drm = NULL; + + return 0; +} +EXPORT_SYMBOL(drm_panel_detach); + +#ifdef CONFIG_OF +struct drm_panel *of_drm_find_panel(struct device_node *np) +{ + struct drm_panel *panel; + + mutex_lock(&panel_lock); + + list_for_each_entry(panel, &panel_list, list) { + if (panel->dev->of_node == np) { + mutex_unlock(&panel_lock); + return panel; + } + } + + mutex_unlock(&panel_lock); + return NULL; +} +EXPORT_SYMBOL(of_drm_find_panel); +#endif diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig new file mode 100644 index 0000000..2ddd5bd --- /dev/null +++ b/drivers/gpu/drm/panel/Kconfig @@ -0,0 +1,4 @@ +menuconfig DRM_PANEL + bool "DRM panel support" + help + Panel registration and lookup framework. diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h new file mode 100644 index 0000000..f02b615 --- /dev/null +++ b/include/drm/drm_panel.h @@ -0,0 +1,65 @@ +/* + * Copyright (C) 2013, NVIDIA Corporation. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sub license, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifndef __DRM_PANEL_H__ +#define __DRM_PANEL_H__ + +#include + +struct drm_connector; +struct drm_device; +struct drm_panel; + +struct drm_panel_funcs { + void (*dpms)(struct drm_panel *panel, int mode); + int (*get_modes)(struct drm_panel *panel); +}; + +struct drm_panel { + struct drm_device *drm; + struct drm_connector *connector; + struct device *dev; + + const struct drm_panel_funcs *funcs; + + struct list_head list; +}; + +void drm_panel_init(struct drm_panel *panel); + +int drm_panel_add(struct drm_panel *panel); +void drm_panel_remove(struct drm_panel *panel); + +int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector); +int drm_panel_detach(struct drm_panel *panel); + +#ifdef CONFIG_OF +struct drm_panel *of_drm_find_panel(struct device_node *np); +#else +static inline struct drm_panel *of_drm_find_panel(struct device_node *np) +{ + return NULL; +} +#endif + +#endif