Hi Biju, On Thu, 19 Mar 2026 16:48:28 +0000 Biju <[email protected]> wrote:
> From: Biju Das <[email protected]> > > The RZ/G2L hardware manual (Rev. 1.50, May 2025), Section 34.4.2.1, > requires waiting more than 1 msec after deasserting the CMN_RSTB signal > before the DSI-Tx module is ready. Increase the delay from 1 usec to > 1 msec by replacing udelay(1) with fsleep(1000). > > Signed-off-by: Biju Das <[email protected]> In your first submission, I commented that "...this should be backported to stable branches (missing Fixes / Cc: stable tags)?" and you answered with "Agreed, will add fixes/stable tags". If you still agree, this patch should be #3 in your list, so that it is easier/straightforward to backport to stable branches. > --- > v1->v2: > * Updated commit header and description. > --- > 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 5020be0f72ac..715872130780 100644 > --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c > +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c > @@ -807,7 +807,7 @@ static int rzg2l_mipi_dsi_startup(struct rzg2l_mipi_dsi > *dsi, > if (ret < 0) > goto err_phy; > > - udelay(1); > + fsleep(1000); > } > > return 0; > -- > 2.43.0 > > -- Hugo Villeneuve
