[PATCH] drm/bridge/tc358775: Fix for dual-link LVDS

[Jiří Vaněk]

Actually, this patch is based on testing with a real HW with dual-link LVDS
display (full HD) and it also matches with a datasheet. Without this fix it
does not work at all.

út 4. 1. 2022 v 14:51 odesílatel Robert Foss <robert.foss at linaro.org>
napsal:

> Jiri: Are you able to test this patch?
>
> Vinay: Could you supply a R-b tag, if you feel that it is warranted?
>
> On Tue, 14 Dec 2021 at 09:13, Vinay Simha B N <simhavcs at gmail.com> wrote:
> >
> > Robert,
> > I do not have the hardware to test this feature. Sorry for the late
> response.
> >
> > On Thu, Nov 18, 2021 at 8:20 PM Robert Foss <robert.foss at linaro.org>
> wrote:
> >>
> >> + Zhen & Vinay
> >>
> >> This patch looks good in itself, but I would like to see a tested by
> >> tag. At the very least testing for regression in single-link LVDS but
> >> ideally some third party verification of this patch.
> >>
> >> On Wed, 10 Nov 2021 at 23:01, Jiri Vanek <jirivanek1 at gmail.com> wrote:
> >> >
> >> > Fixed wrong register shift for single/dual link LVDS output.
> >> >
> >> > Signed-off-by: Jiri Vanek <jirivanek1 at gmail.com>
> >> > ---
> >> >  drivers/gpu/drm/bridge/tc358775.c | 2 +-
> >> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >> >
> >> > diff --git a/drivers/gpu/drm/bridge/tc358775.c
> b/drivers/gpu/drm/bridge/tc358775.c
> >> > index 2272adcc5b4a..1d6ec1baeff2 100644
> >> > --- a/drivers/gpu/drm/bridge/tc358775.c
> >> > +++ b/drivers/gpu/drm/bridge/tc358775.c
> >> > @@ -241,7 +241,7 @@ static inline u32 TC358775_LVCFG_PCLKDIV(uint32_t
> val)
> >> >  }
> >> >
> >> >  #define TC358775_LVCFG_LVDLINK__MASK
>  0x00000002
> >> > -#define TC358775_LVCFG_LVDLINK__SHIFT                        0
> >> > +#define TC358775_LVCFG_LVDLINK__SHIFT                        1
> >> >  static inline u32 TC358775_LVCFG_LVDLINK(uint32_t val)
> >> >  {
> >> >         return ((val) << TC358775_LVCFG_LVDLINK__SHIFT) &
> >> > --
> >> > 2.30.2
> >> >
> >
> >
> >
> > --
> > regards,
> > vinaysimha
>
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