Re: [linux-sunxi] [PATCH 1/3] Revert "drm/sun4i: dsi: Change the start delay calculation"

[Jagan Teki]

On Tue, Oct 1, 2019 at 1:33 PM Icenowy Zheng <icenowy@xxxxxxx> wrote:
>
> This reverts commit da676c6aa6413d59ab0a80c97bbc273025e640b2.
>
> The original commit adds a start parameter to the calculation of the
> start delay according to some old BSP versions from Allwinner. However,
> there're two ways to add this delay -- add it in DSI controller or add
> it in the TCON. Add it in both controllers won't work.
>
> The code before this commit is picked from new versions of BSP kernel,
> which has a comment for the 1 that says "put start_delay to tcon". By
> checking the sun4i_tcon0_mode_set_cpu() in sun4i_tcon driver, it has
> already added this delay, so we shouldn't repeat to add the delay in DSI
> controller, otherwise the timing won't match.

Thanks for this change. look like this is proper reason for adding +
1. also adding bsp code links here might help for future reference.

Otherwise,

Reviewed-by: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>