From patchwork Mon Mar 10 12:05:51 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 14009743 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 19FC3C282DE for ; Mon, 10 Mar 2025 12:09:04 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1trbvA-0002DZ-UT; Mon, 10 Mar 2025 08:07:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1trbv1-0002AR-7h for qemu-devel@nongnu.org; Mon, 10 Mar 2025 08:07:39 -0400 Received: from sender4-pp-f112.zoho.com ([136.143.188.112]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1trbuw-0002Jg-UT for qemu-devel@nongnu.org; Mon, 10 Mar 2025 08:07:37 -0400 ARC-Seal: i=1; a=rsa-sha256; t=1741608440; cv=none; d=zohomail.com; s=zohoarc; b=Jgq9RvhbcUfShoxXHz6CgZ6qSHv/ShdupPRz00e0yCWGl3TM1q5NknMFaMLZW8pCRipe3xFwD6mG3NczqU7sfSvIcc53bc/jXmH4YGJlpihuqff/sptfWWj2BhE3nXRirIneWKg+cGz3bM0pfRoSCxH/OSfCQDHtrSiZo1DGlkE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1741608440; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=mL6BssqBdFtVZrHDCDUqwTNdYD9EWk/2PtIpTUBDV1Q=; b=hBBkYOwsDITfQsUKoqpYTq1NLkYYXE4C+IlKq998nMuOwPnC0x36c6v+N0g7+soROL7XU5HD34HrWS3gtlz3+KjSPZ0uwrKzx0U5v7v9NcjGaWuuI1mTJvFa9S15fIIQ9J2FyIzm5oJ+wdEP9AHq8OicmBqDsQX7bzGBz060LXs= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=dmitry.osipenko@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1741608440; s=zohomail; d=collabora.com; i=dmitry.osipenko@collabora.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:In-Reply-To:References:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Reply-To; bh=mL6BssqBdFtVZrHDCDUqwTNdYD9EWk/2PtIpTUBDV1Q=; b=jyaqzLoNdtH4yZ/nnxDAx4+VmzVtmNaPhwc+UqrWJZRmvY728vVxD8C3FuGRPrZ6 W5SLmA6U1KAQdQy7VDIls8bsC2DnHWYGn6REltdFYi4L5r4bKRPINTPHlAltm+XVik9 WXxMDwDWDEbSgI7HwH5aXKnKwf18qzc+qb/ykMdc= Received: by mx.zohomail.com with SMTPS id 1741608437928619.8853097591066; Mon, 10 Mar 2025 05:07:17 -0700 (PDT) From: Dmitry Osipenko To: Akihiko Odaki , Huang Rui , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Gerd Hoffmann , =?utf-8?q?Alex_Benn=C3=A9e?= , Pierre-Eric Pelloux-Prayer , "Michael S . Tsirkin" , Paolo Bonzini Cc: Gert Wollny , qemu-devel@nongnu.org, Gurchetan Singh , Alyssa Ross , =?utf-8?q?Roger_Pau_Monn=C3=A9?= , Alex Deucher , Stefano Stabellini , =?utf-8?q?Christian_K?= =?utf-8?q?=C3=B6nig?= , Xenia Ragiadakou , Honglei Huang , Julia Zhang , Chen Jiqian , Rob Clark , Yiwei Zhang , Sergio Lopez Pascual Subject: [PATCH v11 06/10] ui/sdl2: Don't disable scanout when display is refreshed Date: Mon, 10 Mar 2025 15:05:51 +0300 Message-ID: <20250310120555.150077-7-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250310120555.150077-1-dmitry.osipenko@collabora.com> References: <20250310120555.150077-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 X-ZohoMailClient: External Received-SPF: pass client-ip=136.143.188.112; envelope-from=dmitry.osipenko@collabora.com; helo=sender4-pp-f112.zoho.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Display refreshment is invoked by a timer and it erroneously disables the active scanout if it happens to be invoked after scanout has been enabled. This offending scanout-disable race condition with a timer can be easily hit when Qemu runs with a disabled vsync by using SDL or GTK displays (with vblank_mode=0 for GTK). Refreshment of display's content shouldn't disable the active display. Fix it by keeping the scanout's state unchanged when display is redrawn. Reviewed-by: Akihiko Odaki Acked-by: Michael S. Tsirkin Tested-by: Alex Bennée Signed-off-by: Dmitry Osipenko --- ui/sdl2-gl.c | 1 - 1 file changed, 1 deletion(-) diff --git a/ui/sdl2-gl.c b/ui/sdl2-gl.c index 8d53e340d40d..31f8fbe03286 100644 --- a/ui/sdl2-gl.c +++ b/ui/sdl2-gl.c @@ -53,7 +53,6 @@ static void sdl2_gl_render_surface(struct sdl2_console *scon) int ww, wh; SDL_GL_MakeCurrent(scon->real_window, scon->winctx); - sdl2_set_scanout_mode(scon, false); SDL_GetWindowSize(scon->real_window, &ww, &wh); surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh);