From patchwork Fri Nov 20 10:25:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 11920023 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 08B0DC56202 for ; Fri, 20 Nov 2020 10:26:00 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8E8C722210 for ; Fri, 20 Nov 2020 10:25:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8E8C722210 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1DF846E89D; Fri, 20 Nov 2020 10:25:55 +0000 (UTC) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5C7BE6E8B1 for ; Fri, 20 Nov 2020 10:25:50 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 4F80AAEDE; Fri, 20 Nov 2020 10:25:48 +0000 (UTC) From: Thomas Zimmermann To: daniel@ffwll.ch, airlied@linux.ie, sam@ravnborg.org, mripard@kernel.org, maarten.lankhorst@linux.intel.com, christian.koenig@amd.com, ville.syrjala@linux.intel.com Subject: [PATCH v2 05/10] drm/fb-helper: Return early in dirty worker Date: Fri, 20 Nov 2020 11:25:40 +0100 Message-Id: <20201120102545.4047-6-tzimmermann@suse.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201120102545.4047-1-tzimmermann@suse.de> References: <20201120102545.4047-1-tzimmermann@suse.de> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 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" Returning early in the dirty worker if no update is required makes the code more readable. No functional changes are made. Signed-off-by: Thomas Zimmermann Reviewed-by: Sam Ravnborg --- drivers/gpu/drm/drm_fb_helper.c | 31 +++++++++++++++---------------- 1 file changed, 15 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 87d4759de04a..c9018ffff5f9 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -407,24 +407,23 @@ static void drm_fb_helper_damage_work(struct work_struct *work) clip->x2 = clip->y2 = 0; spin_unlock_irqrestore(&helper->damage_lock, flags); - /* call dirty callback only when it has been really touched */ - if (clip_copy.x1 < clip_copy.x2 && clip_copy.y1 < clip_copy.y2) { - - /* Generic fbdev uses a shadow buffer */ - if (helper->buffer) { - ret = drm_client_buffer_vmap(helper->buffer, &map); - if (ret) - return; - drm_fb_helper_damage_blit_real(helper, &clip_copy, &map); - } - - if (helper->fb->funcs->dirty) - helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, - &clip_copy, 1); + /* Call damage handlers only if necessary */ + if (!(clip_copy.x1 < clip_copy.x2 && clip_copy.y1 < clip_copy.y2)) + return; - if (helper->buffer) - drm_client_buffer_vunmap(helper->buffer); + /* Generic fbdev uses a shadow buffer */ + if (helper->buffer) { + ret = drm_client_buffer_vmap(helper->buffer, &map); + if (ret) + return; + drm_fb_helper_damage_blit_real(helper, &clip_copy, &map); } + + if (helper->fb->funcs->dirty) + helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, &clip_copy, 1); + + if (helper->buffer) + drm_client_buffer_vunmap(helper->buffer); } /**