From patchwork Mon Oct 24 11:19:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13017282 X-Patchwork-Delegate: neil.armstrong@linaro.org 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 BC6E3EB6460 for ; Mon, 24 Oct 2022 11:24:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=l2O1kfPz4K9nO0dO63l0SRSZgKmYu3+4gu1jPN6QqwA=; b=R7KUg1ZBBLexEA bYMntAhrMr+U3w+yH4p+i0YeiR0aRbyQ71h2CpGNlJr7CocPCirrYpEKs3oIB3ivwJF4wXinbtucT frzQWL3d2d+/iNIu7p5nxIPJYmu9f2o82YdcmakDykmqO9vh4sFqWtY64tc69M0MYPjYV1OnTeLSU 4JvRbNATp4WjJAj3pm1k9WfhJ5oyyRF9mYml6wImV+nHg/3x6hM2uR+vuYurF5aMNWVpPaITu5mr5 fBUXYLFXw22vtVm6D7iRluTsj+US0v/XEPfe+AaUXSnTVcsuBREAwnHRb26xKONMyY5z5yqUyOzVp IbyPNZ3vZTJrUqRkcOmw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1omvYw-001082-2T; Mon, 24 Oct 2022 11:24:10 +0000 Received: from smtp-out1.suse.de ([195.135.220.28]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1omvV2-000xcJ-Fc; Mon, 24 Oct 2022 11:20:11 +0000 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id B4276220DA; Mon, 24 Oct 2022 11:20:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1666610406; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=W2hXo1ZXw+fT7jNTQpjjai6MaQuUlFJ3x4yHM5t/NT8=; b=NmK2JPY7erjfISSjJHyuZn3S9M4HE0QY2DX64ewIKQkqdV4YW55dIfYZUFwsucHgK8EJWo 9OqpMMbfSr3Sj4qTG661IHslL7dTlOf47A0qYZ/yUtPD5rYrjiqIr2/K1pI8y8YSUIBX7A u/2NuQed3cKWK0fTF/Zshk2lHorpMOI= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1666610406; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=W2hXo1ZXw+fT7jNTQpjjai6MaQuUlFJ3x4yHM5t/NT8=; b=2HdzFY+hAc4IQyzPhbPzdnFAvNOMcpZCifG7L10kN4snoDQgnsRKjQRlxM4yHitxgDoIAD 6G6AQD9Zct0kBEBA== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 359A713A98; Mon, 24 Oct 2022 11:20:06 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id UFgyDOZ0VmOYMgAAMHmgww (envelope-from ); Mon, 24 Oct 2022 11:20:06 +0000 From: Thomas Zimmermann To: daniel@ffwll.ch, airlied@gmail.com, sam@ravnborg.org, javierm@redhat.com, mripard@kernel.org, maarten.lankhorst@linux.intel.com Cc: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-aspeed@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, etnaviv@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org, linux-hyperv@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-mips@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, nouveau@lists.freedesktop.org, virtualization@lists.linux-foundation.org, spice-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, xen-devel@lists.xenproject.org, Thomas Zimmermann Subject: [PATCH v2 16/21] drm/fb-helper: Call fb_sync in I/O functions Date: Mon, 24 Oct 2022 13:19:48 +0200 Message-Id: <20221024111953.24307-17-tzimmermann@suse.de> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221024111953.24307-1-tzimmermann@suse.de> References: <20221024111953.24307-1-tzimmermann@suse.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221024_042008_865237_F550AC59 X-CRM114-Status: GOOD ( 10.81 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org Call struct fb_ops.fb_sync in drm_fbdev_{read,write}() to mimic the behavior of fbdev. Fbdev implementations of fb_read and fb_write in struct fb_ops invoke fb_sync to synchronize with outstanding operations before I/O. Doing the same in DRM implementations will allow us to use them throughout DRM drivers. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas --- drivers/gpu/drm/drm_fb_helper.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index f6d22cc4cd876..379e0d2f67198 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -2246,6 +2246,9 @@ static ssize_t drm_fbdev_fb_read(struct fb_info *info, char __user *buf, if (total_size - count < pos) count = total_size - pos; + if (info->fbops->fb_sync) + info->fbops->fb_sync(info); + if (drm_fbdev_use_iomem(info)) ret = fb_read_screen_base(info, buf, count, pos); else @@ -2327,6 +2330,9 @@ static ssize_t drm_fbdev_fb_write(struct fb_info *info, const char __user *buf, count = total_size - pos; } + if (info->fbops->fb_sync) + info->fbops->fb_sync(info); + /* * Copy to framebuffer even if we already logged an error. Emulates * the behavior of the original fbdev implementation.