From patchwork Wed Oct 16 18:25:11 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thierry Reding X-Patchwork-Id: 3056691 Return-Path: X-Original-To: patchwork-linux-fbdev@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 8B894BF924 for ; Wed, 16 Oct 2013 18:27:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4182F20333 for ; Wed, 16 Oct 2013 18:27:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E68D82030D for ; Wed, 16 Oct 2013 18:27:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755718Ab3JPS1d (ORCPT ); Wed, 16 Oct 2013 14:27:33 -0400 Received: from mail-bk0-f53.google.com ([209.85.214.53]:50903 "EHLO mail-bk0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750792Ab3JPS1c (ORCPT ); Wed, 16 Oct 2013 14:27:32 -0400 Received: by mail-bk0-f53.google.com with SMTP id d7so407545bkh.26 for ; Wed, 16 Oct 2013 11:27:31 -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=Wxw5rmS9ALsHjxhh5nF/llCsIgizrCD9w5qXtGWBFEM=; b=fas+zBoGCg1uGUX61oWNOOVfLzZFlG1SxiLBoyS8SIWu7RPyoxTSPZCHdQpWHYTSXs 9j0zM2yghekvvoD8xEyu0Bpdw/YLYZh2QD++Vi4gd6u1cmanL2wVdLhHZM77cLOSaPKY 9nUF82UIoGVhXiiRqry4I0nDElqZ3UnnmSCre/NHoDGtjYKhK0Pzau87XHbx/gVL9Ry9 ck1Po3Wj8UVdg/YHdQi79onvVR8mf7riunNZXG5kNCV9WNeSrYTcE6OZwHu477YiIuPk 2Y51gO3fCffuE6aopSpL44egAkm48rWByXAkwlnoGFYOHvP40nYA6jgPQkmXaDGVcJ4E R5zw== X-Received: by 10.204.121.201 with SMTP id i9mr3804195bkr.13.1381948050967; Wed, 16 Oct 2013 11:27:30 -0700 (PDT) Received: from localhost (port-49179.pppoe.wtnet.de. [46.59.192.180]) by mx.google.com with ESMTPSA id pk7sm47877319bkb.2.1969.12.31.16.00.00 (version=TLSv1.2 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 16 Oct 2013 11:27:29 -0700 (PDT) From: Thierry Reding To: Laurent Pinchart , Tomi Valkeinen , Rob Herring , Pawel Moll , Mark Rutland , Stephen Warren , Ian Campbell Cc: devicetree@vger.kernel.org, linux-fbdev@vger.kernel.org Subject: [RFR 1/2] drm: Add panel support Date: Wed, 16 Oct 2013 20:25:11 +0200 Message-Id: <1381947912-11741-2-git-send-email-treding@nvidia.com> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1381947912-11741-1-git-send-email-treding@nvidia.com> References: <1381947912-11741-1-git-send-email-treding@nvidia.com> Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=ham 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 | 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