From patchwork Tue Mar 6 12:07:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ankit Nautiyal X-Patchwork-Id: 10261519 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 3DFB56016D for ; Tue, 6 Mar 2018 12:14:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2DC6B28F26 for ; Tue, 6 Mar 2018 12:14:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 229A428F2D; Tue, 6 Mar 2018 12:14:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id DFBE328F29 for ; Tue, 6 Mar 2018 12:13:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 293986E68D; Tue, 6 Mar 2018 12:13:59 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id E80936E68D for ; Tue, 6 Mar 2018 12:13:57 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Mar 2018 04:13:57 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.47,431,1515484800"; d="scan'208";a="35872514" Received: from ankit-desktop.iind.intel.com ([10.223.161.14]) by fmsmga001.fm.intel.com with ESMTP; 06 Mar 2018 04:13:55 -0800 From: "Nautiyal, Ankit K" To: dri-devel@lists.freedesktop.org Subject: [PATCH v6 4/9] drm: Add DRM client cap for aspect-ratio Date: Tue, 6 Mar 2018 17:37:38 +0530 Message-Id: <1520338063-13995-5-git-send-email-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1520338063-13995-1-git-send-email-ankit.k.nautiyal@intel.com> References: <1520338063-13995-1-git-send-email-ankit.k.nautiyal@intel.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ankit Nautiyal MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Ankit Nautiyal To enable aspect-ratio support in DRM, blindly exposing the aspect ratio information along with mode, can break things in existing user-spaces which have no intention or support to use this aspect ratio information. To avoid this, a new drm client cap is required to enable a user-space to advertise if it supports modes with aspect-ratio. Based on this cap value, the kernel will take a call on exposing the aspect ratio info in modes or not. This patch adds the client cap for aspect-ratio. Cc: Ville Syrjala Cc: Shashank Sharma Signed-off-by: Ankit Nautiyal V3: rebase V4: As suggested by Marteen Lankhorst modified the commit message explaining the need to use the DRM cap for aspect-ratio. Also, tweaked the comment lines in the code for better understanding and clarity, as recommended by Shashank Sharma. V5: rebase Reviewed-by: Shashank Sharma --- drivers/gpu/drm/drm_ioctl.c | 5 +++++ include/drm/drm_file.h | 8 ++++++++ include/uapi/drm/drm.h | 7 +++++++ 3 files changed, 20 insertions(+) diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index af78291..54a98b7 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -325,6 +325,11 @@ drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) file_priv->atomic = req->value; file_priv->universal_planes = req->value; break; + case DRM_CLIENT_CAP_ASPECT_RATIO: + if (req->value > 1) + return -EINVAL; + file_priv->aspect_ratio_allowed = req->value; + break; default: return -EINVAL; } diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h index 5176c37..02b7dde 100644 --- a/include/drm/drm_file.h +++ b/include/drm/drm_file.h @@ -182,6 +182,14 @@ struct drm_file { unsigned atomic:1; /** + * @aspect_ratio_allowed: + * + * True, if client can handle picture aspect ratios, and has requested + * to pass this information along with the mode. + */ + unsigned aspect_ratio_allowed:1; + + /** * @is_master: * * This client is the creator of @master. Protected by struct diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h index 6fdff59..9c660e1 100644 --- a/include/uapi/drm/drm.h +++ b/include/uapi/drm/drm.h @@ -680,6 +680,13 @@ struct drm_get_cap { */ #define DRM_CLIENT_CAP_ATOMIC 3 +/** + * DRM_CLIENT_CAP_ASPECT_RATIO + * + * If set to 1, the DRM core will provide aspect ratio information in modes. + */ +#define DRM_CLIENT_CAP_ASPECT_RATIO 4 + /** DRM_IOCTL_SET_CLIENT_CAP ioctl argument type */ struct drm_set_client_cap { __u64 capability;