Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753677AbaBGNqM (ORCPT ); Fri, 7 Feb 2014 08:46:12 -0500 Received: from mga02.intel.com ([134.134.136.20]:3522 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753599AbaBGNqJ (ORCPT ); Fri, 7 Feb 2014 08:46:09 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.95,800,1384329600"; d="scan'208";a="479633122" From: sagar.a.kamble@intel.com To: intel-gfx@lists.freedesktop.org Cc: vijay.a.purushothaman@intel.com, airlied@linux.ie, daniel.vetter@ffwll.ch, jani.nikula@linux.intel.com, tomi.valkeinen@ti.com, airlied@redhat.com, robdclark@gmail.com, archit@ti.com, gregkh@linuxfoundation.org, joe@perches.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, ville.syrjala@linux.intel.com, Sagar Kamble Subject: [PATCH v4 03/11] drm: Add drm_mode_create_rotation_property() 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 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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, -- 1.8.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/