From patchwork Thu May 29 15:06:51 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matt Roper X-Patchwork-Id: 4265721 Return-Path: X-Original-To: patchwork-dri-devel@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 84484BEEAA for ; Thu, 29 May 2014 15:07:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AD4F220351 for ; Thu, 29 May 2014 15:07:17 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id DC5ED202BE for ; Thu, 29 May 2014 15:07:16 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3FBEB6E42A; Thu, 29 May 2014 08:07:16 -0700 (PDT) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id C701D6E404; Thu, 29 May 2014 08:07:14 -0700 (PDT) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP; 29 May 2014 08:07:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.98,934,1392192000"; d="scan'208";a="546784077" Received: from mdroper-hswdev.fm.intel.com (HELO mdroper-hswdev) ([10.1.134.215]) by fmsmga002.fm.intel.com with ESMTP; 29 May 2014 08:06:38 -0700 Received: from mattrope by mdroper-hswdev with local (Exim 4.82) (envelope-from ) id 1Wq1w2-0006TV-TC; Thu, 29 May 2014 08:08:02 -0700 From: Matt Roper To: intel-gfx@lists.freedesktop.org Subject: [PATCH 1/4] drm: Check CRTC compatibility in setplane Date: Thu, 29 May 2014 08:06:51 -0700 Message-Id: <1401376014-24845-2-git-send-email-matthew.d.roper@intel.com> X-Mailer: git-send-email 1.8.5.1 In-Reply-To: <1401376014-24845-1-git-send-email-matthew.d.roper@intel.com> References: <1401376014-24845-1-git-send-email-matthew.d.roper@intel.com> Cc: dri-devel@lists.freedesktop.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00, 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 The DRM core setplane code should check that the plane is usable on the specified CRTC before calling into the driver. Prior to this patch, a plane's possible_crtcs field was purely informational for userspace and was never actually verified at the kernel level (aside from the primary plane helper). Cc: dri-devel@lists.freedesktop.org Reviewed-by: Chon Ming Lee Signed-off-by: Matt Roper --- drivers/gpu/drm/drm_crtc.c | 7 +++++++ drivers/gpu/drm/drm_plane_helper.c | 6 ------ 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 37a3e07..1cfd1e3 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -2153,6 +2153,13 @@ int drm_mode_setplane(struct drm_device *dev, void *data, } crtc = obj_to_crtc(obj); + /* Check whether this plane is usable on this CRTC */ + if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { + DRM_DEBUG_KMS("Invalid crtc for plane\n"); + ret = -EINVAL; + goto out; + } + fb = drm_framebuffer_lookup(dev, plane_req->fb_id); if (!fb) { DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", diff --git a/drivers/gpu/drm/drm_plane_helper.c b/drivers/gpu/drm/drm_plane_helper.c index d966afa..b601233 100644 --- a/drivers/gpu/drm/drm_plane_helper.c +++ b/drivers/gpu/drm/drm_plane_helper.c @@ -137,12 +137,6 @@ int drm_primary_helper_update(struct drm_plane *plane, struct drm_crtc *crtc, return -EINVAL; } - /* Primary planes are locked to their owning CRTC */ - if (plane->possible_crtcs != drm_crtc_mask(crtc)) { - DRM_DEBUG_KMS("Cannot change primary plane CRTC\n"); - return -EINVAL; - } - /* Disallow scaling */ src_w >>= 16; src_h >>= 16;