Hi Prabhakar, Thanks for the patch. > -----Original Message----- > From: Prabhakar <prabhakar.csengg@xxxxxxxxx> > Sent: 12 May 2025 19:23 > Subject: [PATCH v5 07/12] drm: renesas: rz-du: mipi_dsi: Make "rst" reset control optional for > RZ/V2H(P) > > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> > > In preparation for adding support for the Renesas RZ/V2H(P) SoC, make the "rst" reset control optional > in the MIPI DSI driver. The RZ/V2H(P) SoC does not provide this reset line, and attempting to acquire > it using the mandatory API causes probe failure. > > Switching to devm_reset_control_get_optional_exclusive() ensures compatibility with both SoCs that > provide this reset line and those that do not, such as RZ/V2H(P). > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> Reviewed-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx> Cheers, Biju > --- > v4->v5: > - New patch > --- > 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 00c2bc6e9d6c..5fc607be0c46 100644 > --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c > +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c > @@ -748,7 +748,7 @@ static int rzg2l_mipi_dsi_probe(struct platform_device *pdev) > if (IS_ERR(dsi->vclk)) > return PTR_ERR(dsi->vclk); > > - dsi->rstc = devm_reset_control_get_exclusive(dsi->dev, "rst"); > + dsi->rstc = devm_reset_control_get_optional_exclusive(dsi->dev, > +"rst"); > if (IS_ERR(dsi->rstc)) > return dev_err_probe(dsi->dev, PTR_ERR(dsi->rstc), > "failed to get rst\n"); > -- > 2.49.0
