linux-kernel - [PATCH 4.10 12/69] drm/nouveau/kms/nv50: fix setting of HeadSetRasterVertBlankDmi method

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Date:   Wed, 19 Apr 2017 16:36:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ben Skeggs <bskeggs@...hat.com>
Subject: [PATCH 4.10 12/69] drm/nouveau/kms/nv50: fix setting of HeadSetRasterVertBlankDmi method

4.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Skeggs <bskeggs@...hat.com>

commit d639fbcc102745187f747a21bdcffcf628e174c8 upstream.

Signed-off-by: Ben Skeggs <bskeggs@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/nouveau/nv50_display.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/nouveau/nv50_display.c
+++ b/drivers/gpu/drm/nouveau/nv50_display.c
@@ -2038,6 +2038,7 @@ nv50_head_atomic_check_mode(struct nv50_
 	u32 vbackp  = (mode->vtotal - mode->vsync_end) * vscan / ilace;
 	u32 hfrontp =  mode->hsync_start - mode->hdisplay;
 	u32 vfrontp = (mode->vsync_start - mode->vdisplay) * vscan / ilace;
+	u32 blankus;
 	struct nv50_head_mode *m = &asyh->mode;
 
 	m->h.active = mode->htotal;
@@ -2051,9 +2052,10 @@ nv50_head_atomic_check_mode(struct nv50_
 	m->v.blanks = m->v.active - vfrontp - 1;
 
 	/*XXX: Safe underestimate, even "0" works */
-	m->v.blankus = (m->v.active - mode->vdisplay - 2) * m->h.active;
-	m->v.blankus *= 1000;
-	m->v.blankus /= mode->clock;
+	blankus = (m->v.active - mode->vdisplay - 2) * m->h.active;
+	blankus *= 1000;
+	blankus /= mode->clock;
+	m->v.blankus = blankus;
 
 	if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
 		m->v.blank2e =  m->v.active + m->v.synce + vbackp;