linux-kernel - [PATCH AUTOSEL 4.19 054/671] drm: rcar-du: Fix vblank initialization

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Date:   Thu, 16 Jan 2020 11:44:45 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Sasha Levin <sashal@...nel.org>,
        dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 054/671] drm: rcar-du: Fix vblank initialization

From: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>

[ Upstream commit 3d61fe5f59dd3e6f96fc0772156d257cb04dc656 ]

The drm_vblank_init() takes the total number of CRTCs as an argument,
but the rcar-du driver passes a bitmask of the CRTC indices. Fix it.

Fixes: 4bf8e1962f91 ("drm: Renesas R-Car Display Unit DRM driver")
Reported-by: Tomi Valkeinen <tomi.valkeinen@...com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/rcar-du/rcar_du_kms.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 0386b454e221..6a9578159c2b 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -544,7 +544,7 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 	 * Initialize vertical blanking interrupts handling. Start with vblank
 	 * disabled for all CRTCs.
 	 */
-	ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
+	ret = drm_vblank_init(dev, rcdu->num_crtcs);
 	if (ret < 0)
 		return ret;
 
-- 
2.20.1