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On Mon, Mar 30, 2026 at 11:44:45AM +0100, Biju wrote: > From: Biju Das > > The RZ/G2L hardware manual (Rev. 1.50, May 2025), Section 34.4.2.1, > requires waiting at least 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) for RZ/G2L SoCs. > Tested-by: Tommaso Merciai Kind Regards, Tommaso > Fixes: 7a043f978ed1 ("drm: rcar-du: Add RZ/G2L DSI driver") > Cc: stable@vger.kernel.org > Signed-off-by: Biju Das > --- > v2->v3: > * Moved the patch from patch#4 to patch#2. > * Added fixes tag. > * Updated commit description. > 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 ff95cb9a7de5..9d9f77d8f949 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 >