From patchwork Tue Jun 4 15:41:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 10975577 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3497914B6 for ; Tue, 4 Jun 2019 15:42:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 23CF127F92 for ; Tue, 4 Jun 2019 15:42:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 175B7285E5; Tue, 4 Jun 2019 15:42:24 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 C2BCD2853A for ; Tue, 4 Jun 2019 15:42:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 931FB89A72; Tue, 4 Jun 2019 15:42:12 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3CC1989A62 for ; Tue, 4 Jun 2019 15:42:09 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 7D2BAAEFC; Tue, 4 Jun 2019 15:42:06 +0000 (UTC) From: Thomas Zimmermann To: kraxel@redhat.com, airlied@redhat.com, daniel@ffwll.ch, maarten.lankhorst@linux.intel.com, maxime.ripard@bootlin.com, sean@poorly.run, sam@ravnborg.org, christian.koenig@amd.com Subject: [PATCH 5/8] drm/mgag200: Pin framebuffer BO during dirty update Date: Tue, 4 Jun 2019 17:41:58 +0200 Message-Id: <20190604154201.14460-6-tzimmermann@suse.de> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190604154201.14460-1-tzimmermann@suse.de> References: <20190604154201.14460-1-tzimmermann@suse.de> MIME-Version: 1.0 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: Thomas Zimmermann , dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Another explicit lock operation of a GEM VRAM BO is located in mgag200's framebuffer update code. Instead of locking the BO, we pin it to wherever it is. Signed-off-by: Thomas Zimmermann --- drivers/gpu/drm/mgag200/mgag200_fb.c | 26 ++++++++++++++------------ 1 file changed, 14 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/mgag200/mgag200_fb.c b/drivers/gpu/drm/mgag200/mgag200_fb.c index 97c575a9a86f..dbcf179a120c 100644 --- a/drivers/gpu/drm/mgag200/mgag200_fb.c +++ b/drivers/gpu/drm/mgag200/mgag200_fb.c @@ -26,7 +26,7 @@ static void mga_dirty_update(struct mga_fbdev *mfbdev, struct drm_gem_vram_object *gbo; int src_offset, dst_offset; int bpp = mfbdev->mfb.base.format->cpp[0]; - int ret = -EBUSY; + int ret; u8 *dst; bool unmap = false; bool store_for_later = false; @@ -36,18 +36,20 @@ static void mga_dirty_update(struct mga_fbdev *mfbdev, obj = mfbdev->mfb.obj; gbo = drm_gem_vram_of_gem(obj); - /* Try to lock the BO. If we fail with -EBUSY then - * the BO is being moved and we should store up the - * damage until later. + /* We pin the BO to system memory so it won't be moved during + * the update and doesn't waste video ram. If the BO is already + * located in VRAM, the pin operation will simply increment the + * pin count. */ - if (drm_can_sleep()) - ret = drm_gem_vram_lock(gbo, true); - if (ret) { - if (ret != -EBUSY) - return; - + if (drm_can_sleep()) { + ret = drm_gem_vram_pin(gbo, TTM_PL_FLAG_SYSTEM); + if (ret) { + if (ret != -EBUSY) + return; + store_for_later = true; + } + } else store_for_later = true; - } x2 = x + width - 1; y2 = y + height - 1; @@ -100,7 +102,7 @@ static void mga_dirty_update(struct mga_fbdev *mfbdev, drm_gem_vram_kunmap(gbo); out: - drm_gem_vram_unlock(gbo); + drm_gem_vram_unpin(gbo); } static void mga_fillrect(struct fb_info *info,