The function clk_set_rate() will return it's input parameter, so it's return
value in normal condition is nonzero. In this case, we should report an error
when it return zero rather than return a nonzero value.

Signed-off-by: Eric Gao <eric....@rock-chips.com>
---

Changes in v2:
-Fix rk_display_init() function report error(err:-19).

 drivers/video/rockchip/rk_vop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/rockchip/rk_vop.c b/drivers/video/rockchip/rk_vop.c
index ac9e7db..e8fa177 100644
--- a/drivers/video/rockchip/rk_vop.c
+++ b/drivers/video/rockchip/rk_vop.c
@@ -247,7 +247,7 @@ int rk_display_init(struct udevice *dev, ulong fbbase, int 
ep_node)
        ret = clk_get_by_index(dev, 1, &clk);
        if (!ret)
                ret = clk_set_rate(&clk, timing.pixelclock.typ);
-       if (ret) {
+       if (!ret) {
                debug("%s: Failed to set pixel clock: ret=%d\n", __func__, ret);
                return ret;
        }
-- 
1.9.1


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