On 2016年08月09日 03:29, Sean Paul wrote:
From: Douglas Anderson <dianders@xxxxxxxxxxxx>
When fixing up the clock in vop_crtc_mode_fixup() we're not doing it
quite correctly. Specifically if we've got the true clock 266666667 Hz,
we'll perform this calculation:
266666667 / 1000 => 266666
Later when we try to set the clock we'll do clk_set_rate(266666 *
1000). The common clock framework won't actually pick the proper clock
in this case since it always wants clocks <= the specified one.
Let's solve this by using DIV_ROUND_UP.
Good, applied to my drm fixes.
Thanks
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
---
drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 31744fe..1bbffaf 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -891,7 +891,8 @@ static bool vop_crtc_mode_fixup(struct drm_crtc *crtc,
struct vop *vop = to_vop(crtc);
adjusted_mode->clock =
- clk_round_rate(vop->dclk, mode->clock * 1000) / 1000;
+ DIV_ROUND_UP(clk_round_rate(vop->dclk, mode->clock * 1000),
+ 1000);
return true;
}
--
Ｍark Yao
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