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Thu, 3 Nov 2022 15:14:57 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id GBP+F/HaY2PBGgAAMHmgww (envelope-from ); Thu, 03 Nov 2022 15:14:57 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 46242308-5b8a-11ed-8fd0-01056ac49cbb DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1667488498; 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=5Rdbs1K7PrH8FqVsteDFsz2Pg6HAnz17D2gSGEJwptg=; b=1QzEPzAu/XO9DJ7+I1Ls8u6iVJBqVfE0RfLcCGHCvzFb6nbQG7y/8DBvVDIcFJv1lnC+hZ VFTTseMsIGFGbvg8BElx17Rw50wWqUakn6xd0cxmAnfTlDeZZ0lw1h6Wt06aRSUVnZwveH he9C374VbO9S3fUtNy62s5HXA9q9xCo= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1667488498; 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=5Rdbs1K7PrH8FqVsteDFsz2Pg6HAnz17D2gSGEJwptg=; b=f8pZPqG9V3vdxDoWdtzuNcpX0gB4bZkuJ5Drjrd7WuBVLUdk/140+GTeZY398tPnBeuus7 WLY+csOh/CkEJuAA== 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: "linux-hyperv@vger.kernel.orglinux-hyperv"@vger.kernel.org, linux-aspeed@lists.ozlabs.org, nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, linux-stm32@st-md-mailman.stormreply.com, linux-samsung-soc@vger.kernel.org, amd-gfx@lists.freedesktop.org, linux-rockchip@lists.infradead.org, xen-devel@lists.xenproject.org, linux-sunxi@lists.linux.dev, linux-arm-msm@vger.kernel.org, intel-gfx@lists.freedesktop.org, etnaviv@lists.freedesktop.org, linux-mediatek@lists.infradead.org, spice-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-renesas-soc@vger.kernel.org, freedreno@lists.freedesktop.org, Thomas Zimmermann Subject: [PATCH v3 16/23] drm/fb-helper: Call fb_sync in I/O functions Date: Thu, 3 Nov 2022 16:14:39 +0100 Message-Id: <20221103151446.2638-17-tzimmermann@suse.de> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221103151446.2638-1-tzimmermann@suse.de> References: <20221103151446.2638-1-tzimmermann@suse.de> MIME-Version: 1.0 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.