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From:   Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
To:     dri-devel@lists.freedesktop.org
Cc:     linux-snps-arc@lists.infradead.org, linux-kernel@vger.kernel.org,
        Gustavo Padovan <gustavo@padovan.org>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>,
        Alexey Brodkin <alexey.brodkin@synopsys.com>,
        stable@vger.kernel.org,
        =?UTF-8?q?St=C3=A9phane=20Marchesin?= <marcheu@chromium.org>,
        Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Subject: [PATCH] DRM: UDL: get rid of useless vblank initialization
Date:   Fri, 28 Sep 2018 17:41:26 +0300
Message-Id: <20180928144126.21598-1-Eugeniy.Paltsev@synopsys.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

UDL doesn't support vblank functionality so we don't need to
initialize vblank here (we are able to send page flip
completion events even without vblank initialization)

Moreover current drm_vblank_init call with num_crtcs > 0 causes
sending DRM_EVENT_FLIP_COMPLETE event with zero timestamp every
time. This breaks userspace apps (for example weston) which
relies on timestamp value.

Cc: stable@vger.kernel.org
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
---
 drivers/gpu/drm/udl/udl_main.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c
index f455f095a146..1b014d92855b 100644
--- a/drivers/gpu/drm/udl/udl_main.c
+++ b/drivers/gpu/drm/udl/udl_main.c
@@ -350,15 +350,10 @@ int udl_driver_load(struct drm_device *dev, unsigned long flags)
 	if (ret)
 		goto err;
 
-	ret = drm_vblank_init(dev, 1);
-	if (ret)
-		goto err_fb;
-
 	drm_kms_helper_poll_init(dev);
 
 	return 0;
-err_fb:
-	udl_fbdev_cleanup(dev);
+
 err:
 	if (udl->urbs.count)
 		udl_free_urb_list(dev);
-- 
2.14.4