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@rock-chips.com>

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 34b78e73653248316fcd24732d03d253454c6e50..6b447318ef510b98bd66250603d9769eaffb25f3 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -667,7 +667,7 @@ 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