RE: [PATCH 1/2] drm: renesas: rzg2l_mipi_dsi: Use fsleep() for 1ms delay in D-PHY init

[Biju Das]

Hi Hugo,

> -----Original Message-----
> From: Hugo Villeneuve <hugo@xxxxxxxxxxx>
> Sent: 17 March 2026 15:02
> Subject: Re: [PATCH 1/2] drm: renesas: rzg2l_mipi_dsi: Use fsleep() for 1ms delay in D-PHY init
> 
> Hi Biju,
> 
> On Tue, 17 Mar 2026 12:36:00 +0000
> Biju <biju.das.au@xxxxxxxxx> wrote:
> 
> > From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> >
> > Replace udelay(1) with fsleep(1000) in rzg2l_mipi_dsi_dphy_init() to
> > follow the power-on sequence described in Figure 34.5 of section
> > "34.4.2.1 Reset" of the RZ/G2L hardware manual Rev.1.50 May 2025.
> >
> > Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> 
> Seems to me like this should be backported to stable branches (missing Fixes / Cc: stable tags)?

Agreed, will add fixes/stable tags.

Cheers,
Biju

> 
> 
> > ---
> >  drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
> > b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
> > index a87a301326c7..e53b48e4de56 100644
> > --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
> > +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
> > @@ -528,7 +528,7 @@ static int rzg2l_mipi_dsi_dphy_init(struct rzg2l_mipi_dsi *dsi,
> >  	if (ret < 0)
> >  		return ret;
> >
> > -	udelay(1);
> > +	fsleep(1000);
> >
> >  	return 0;
> >  }
> > --
> > 2.43.0
> >
> >
> 
> 
> --
> Hugo Villeneuve <hugo@xxxxxxxxxxx>