From patchwork Mon Oct 7 08:34:38 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thierry Reding X-Patchwork-Id: 2995151 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 5C83D9F243 for ; Mon, 7 Oct 2013 09:02:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 00DEA201C7 for ; Mon, 7 Oct 2013 09:02:35 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 8CF1F201BF for ; Mon, 7 Oct 2013 09:02:33 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 83EFCE7137 for ; Mon, 7 Oct 2013 02:02:33 -0700 (PDT) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-bk0-f51.google.com (mail-bk0-f51.google.com [209.85.214.51]) by gabe.freedesktop.org (Postfix) with ESMTP id 91FFEE6859 for ; Mon, 7 Oct 2013 01:37:19 -0700 (PDT) Received: by mail-bk0-f51.google.com with SMTP id mx10so2436278bkb.24 for ; Mon, 07 Oct 2013 01:37:18 -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=5onEfWmD/DloTXLanN5fUjVzRxX0tsjlBA06yiltlAg=; b=WF8+ToDfP30w3A6itbNOrUh0p0/H5Jxrzol34y/TlK2g1RsQ0qO6/iD9Ato7CiZMms bRyxAv7WT84MbtnptXY01ZDiLmm7XGkudW7Wt7ZAcPtbt7HqoEd7O3n0P7LK55tCCCXE FgbJaESSdWpR6nZgKHo+vY6QGqKOm+TOUyQ3Ppp4WCztFbMzXTbUpiUefgVufEVt/iEl gV7x1Q7ELaa2fSaj4Yp1zu5oIQU3IxgzyZl/np3wt1AMvsZtMFPSvkuiAnaYSbM9xXuu US4Gam4Aa6p2rN5z4l0F+iqcS5hZM13e9y3iNOnxRaEcwShGorhXUxlqPV+UZSdJr07u rc7w== X-Received: by 10.204.121.201 with SMTP id i9mr26146179bkr.13.1381135038502; Mon, 07 Oct 2013 01:37:18 -0700 (PDT) Received: from localhost (port-46445.pppoe.wtnet.de. [46.59.230.36]) by mx.google.com with ESMTPSA id z6sm16330838bkn.8.1969.12.31.16.00.00 (version=TLSv1.2 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 07 Oct 2013 01:37:17 -0700 (PDT) From: Thierry Reding To: dri-devel@lists.freedesktop.org Subject: [PATCH v2 21/27] drm: Add panel support Date: Mon, 7 Oct 2013 10:34:38 +0200 Message-Id: <1381134884-5816-22-git-send-email-treding@nvidia.com> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1381134884-5816-1-git-send-email-treding@nvidia.com> References: <1381134884-5816-1-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=-4.3 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 --- Changes in v2: - split .dpms() into separate .disable() and .enable() 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 | 78 +++++++++++++++++++++++++++++++++++ 5 files changed, 181 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 290e2ac..a1d4f8e 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -238,3 +238,5 @@ source "drivers/gpu/drm/qxl/Kconfig" source "drivers/gpu/drm/msm/Kconfig" source "drivers/gpu/drm/tegra/Kconfig" + +source "drivers/gpu/drm/panel/Kconfig" diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index e39cd03..81363a9 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..4c8760b --- /dev/null +++ b/include/drm/drm_panel.h @@ -0,0 +1,78 @@ +/* + * 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 (*disable)(struct drm_panel *panel); + void (*enable)(struct drm_panel *panel); + 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; +}; + +static inline void drm_panel_disable(struct drm_panel *panel) +{ + if (panel && panel->funcs && panel->funcs->disable) + panel->funcs->disable(panel); +} + +static inline void drm_panel_enable(struct drm_panel *panel) +{ + if (panel && panel->funcs && panel->funcs->enable) + panel->funcs->enable(panel); +} + +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