Re: [PATCH v2 2/2] drm/bridge: ti-sn65dsi83: Fix enable/disable flow to meet spec

[Fabio Estevam]

On Thu, May 4, 2023 at 6:12 AM Alexander Stein
<alexander.stein@xxxxxxxxxxxxxxx> wrote:
>
> Am Mittwoch, 3. Mai 2023, 18:33:07 CEST schrieb Frieder Schrempf:
> > From: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>
> >
> > The datasheet describes the following initialization flow including
> > minimum delay times between each step:
> >
> > 1. DSI data lanes need to be in LP-11 and the clock lane in HS mode
> > 2. toggle EN signal
> > 3. initialize registers
> > 4. enable PLL
> > 5. soft reset
> > 6. enable DSI stream
> > 7. check error status register
> >
> > To meet this requirement we need to make sure the host bridge's
> > pre_enable() is called first by using the pre_enable_prev_first
> > flag.
> >
> > Furthermore we need to split enable() into pre_enable() which covers
> > steps 2-5 from above and enable() which covers step 7 and is called
> > after the host bridge's enable().
> >
> > Signed-off-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>
>
> Tested-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx> #TQMa8MxML/MBa8Mx

Should this have a Fixes tag so that it could be backported to stable kernels?