Re: [PATCH 1/2] drm/rockchip: Properly adjust to a true clock in adjusted_mode

[Heiko Stübner]

Am Samstag, 15. Juni 2019, 00:47:29 CEST schrieb Douglas Anderson:
> 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: b59b8de31497 ("drm/rockchip: return a true clock rate to adjusted_mode")
> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
> Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
> Reviewed-by: Yakir Yang <ykk@xxxxxxxxxxxxxx>

I gave both patches a testrun on rk3288, rk3328 and rk3399 and
applied them to drm-misc-next thereafter


Thanks
Heiko