drm/rockchip: Properly adjust to a true clock in adjusted_mode
[ Upstream commit 99b9683f2142b20bad78e61f7f829e8714e45685 ] 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. Fixes: b59b8de3 ("drm/rockchip: return a true clock rate to adjusted_mode") Signed-off-by: NDouglas Anderson <dianders@chromium.org> Signed-off-by: NSean Paul <seanpaul@chromium.org> Reviewed-by: NYakir Yang <ykk@rock-chips.com> Signed-off-by: NHeiko Stuebner <heiko@sntech.de> Link: https://patchwork.freedesktop.org/patch/msgid/20190614224730.98622-1-dianders@chromium.orgSigned-off-by: NSasha Levin <sashal@kernel.org>
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