From patchwork Fri Feb 7 13:45:08 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: sagar.a.kamble@intel.com X-Patchwork-Id: 3605121 Return-Path: X-Original-To: patchwork-intel-gfx@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 3554A9F2E9 for ; Fri, 7 Feb 2014 13:46:15 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6CA16200F3 for ; Fri, 7 Feb 2014 13:46:14 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 9639C200BE for ; Fri, 7 Feb 2014 13:46:13 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F3D20105776; Fri, 7 Feb 2014 05:46:11 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTP id 65441105778; Fri, 7 Feb 2014 05:46:08 -0800 (PST) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP; 07 Feb 2014 05:41:55 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.95,800,1384329600"; d="scan'208";a="479633122" Received: from sagar-desktop.iind.intel.com ([10.223.82.31]) by orsmga002.jf.intel.com with ESMTP; 07 Feb 2014 05:46:04 -0800 From: sagar.a.kamble@intel.com To: intel-gfx@lists.freedesktop.org Date: Fri, 7 Feb 2014 19:15:08 +0530 Message-Id: <1391780716-21896-4-git-send-email-sagar.a.kamble@intel.com> X-Mailer: git-send-email 1.8.5 In-Reply-To: <1391780716-21896-1-git-send-email-sagar.a.kamble@intel.com> References: <1391780716-21896-1-git-send-email-sagar.a.kamble@intel.com> MIME-Version: 1.0 Cc: airlied@linux.ie, daniel.vetter@ffwll.ch, linux-kernel@vger.kernel.org, tomi.valkeinen@ti.com, archit@ti.com, dri-devel@lists.freedesktop.org, gregkh@linuxfoundation.org, joe@perches.com, airlied@redhat.com, Sagar Kamble Subject: [Intel-gfx] [PATCH v4 03/11] drm: Add drm_mode_create_rotation_property() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org X-Spam-Status: No, score=-4.7 required=5.0 tests=BAYES_00,KHOP_BIG_TO_CC, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, 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 From: Ville Syrjälä Add a function to create a standards compliant rotation property. v4: For creating rotation bitmask property send number of values as only number of set rotations Signed-off-by: Ville Syrjälä Signed-off-by: Sagar Kamble Tested-by: Sagar Kamble --- drivers/gpu/drm/drm_crtc.c | 33 +++++++++++++++++++++++++++++++++ include/drm/drm_crtc.h | 2 ++ 2 files changed, 35 insertions(+) diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 628d3d3..e7bbbad 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -4118,3 +4118,36 @@ void drm_mode_config_cleanup(struct drm_device *dev) idr_destroy(&dev->mode_config.crtc_idr); } EXPORT_SYMBOL(drm_mode_config_cleanup); + +/* +* Function to get number of bits set in bitmask +* using Brian Kernighan's Algorithm +*/ +unsigned int bits_set(unsigned int n) +{ + unsigned int count = 0; + + while (n) { + n &= (n-1); + count ++; + } + return count; +} + +struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, + unsigned int supported_rotations) +{ + static const struct drm_prop_enum_list props[] = { + { DRM_ROTATE_0, "rotate-0" }, + { DRM_ROTATE_90, "rotate-90" }, + { DRM_ROTATE_180, "rotate-180" }, + { DRM_ROTATE_270, "rotate-270" }, + { DRM_REFLECT_X, "reflect-x" }, + { DRM_REFLECT_Y, "reflect-y" }, + }; + + return drm_property_create_bitmask(dev, 0, "rotation", + props, bits_set(supported_rotations), + supported_rotations); +} +EXPORT_SYMBOL(drm_mode_create_rotation_property); diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 41b86d2..4b3ac70 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -1183,6 +1183,8 @@ extern int drm_format_plane_cpp(uint32_t format, int plane); extern int drm_format_horz_chroma_subsampling(uint32_t format); extern int drm_format_vert_chroma_subsampling(uint32_t format); extern const char *drm_get_format_name(uint32_t format); +extern struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, + unsigned int supported_rotations); /* Helpers */ static inline struct drm_crtc *drm_crtc_find(struct drm_device *dev,