linux-kernel - [PATCH v3 1/6] drm/rockchip: vop: Fix virtual stride calculation

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Message-Id: <1437466807-13689-2-git-send-email-mark.yao@rock-chips.com>
Date:	Tue, 21 Jul 2015 16:20:02 +0800
From:	Mark Yao <mark.yao@...k-chips.com>
To:	dri-devel@...ts.freedesktop.org
Cc:	David Airlie <airlied@...ux.ie>, Heiko Stuebner <heiko@...ech.de>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Mark Yao <mark.yao@...k-chips.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Daniel Vetter <daniel@...ll.ch>,
	Rob Clark <robdclark@...il.com>, tfiga@...omium.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
	sandy.huang@...k-chips.com, dkm@...k-chips.com, zwl@...k-chips.com,
	xw@...k-chips.com
Subject: [PATCH v3 1/6] drm/rockchip: vop: Fix virtual stride calculation

vir_stride need number words of the virtual width, and fb->pitches
save bytes_per_pixel, so just div 4 switch to stride.

Signed-off-by: Mark Yao <mark.yao@...k-chips.com>
---
Changes in v3:
Adviced by Tomasz Figa
- use more suitable tile for this patch. 

Changes in v2: None

 drivers/gpu/drm/rockchip/rockchip_drm_vop.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 4557f33..3558acb 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -644,7 +644,7 @@ static int vop_update_plane_event(struct drm_plane *plane,
 	offset += (src.y1 >> 16) * fb->pitches[0];
 	yrgb_mst = rk_obj->dma_addr + offset;
 
-	y_vir_stride = fb->pitches[0] / (fb->bits_per_pixel >> 3);
+	y_vir_stride = fb->pitches[0] >> 2;
 
 	/*
 	 * If this plane update changes the plane's framebuffer, (or more
-- 
1.7.9.5


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