[PATCH] drm: exynos: Fix fb_videomode <-> drm_mode_modeinfo conversion

[James Simmons]

> The fb_videomode structure stores the front porch and back porch in the
> right_margin and left_margin fields respectively. right_margin should
> thus be computed with hsync_start - hdisplay, and left_margin with
> htotal - hsync_end. The same holds for the vertical direction.
> 
>        Active               Front           Sync            Back
>        Region               Porch                           Porch
> <-------------------><----------------><-------------><---------------->
> 
>   //////////////////|
>  ////////////////// |
> //////////////////  |..................               ..................
>                                        _______________
> 
> <------ xres -------><- right_margin -><- hsync_len -><- left_margin -->
> 
> <---- hdisplay ----->
> <------------ hsync_start ------------>
> <--------------------- hsync_end -------------------->
> <--------------------------------- htotal ----------------------------->
> 
> Fix the fb_videomode <-> drm_mode_modeinfo conversion functions
> accordingly.
> 

Wow I see this has remegered. Some time last year I posted a patch that 
had these routines in a generic format for people to use. I can repost 
them again if people are interested.