From: Lad Prabhakar Date: Mon, 9 Jun 2025 22:56:26 +0000 (+0100) Subject: drm: renesas: rz-du: mipi_dsi: Make "rst" reset control optional for RZ/V2H(P) X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e96bec001af60857ece60b5fd10caa9886bbf12d;p=thirdparty%2Flinux.git drm: renesas: rz-du: mipi_dsi: Make "rst" reset control optional for RZ/V2H(P) 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). Co-developed-by: Fabrizio Castro Signed-off-by: Fabrizio Castro Signed-off-by: Lad Prabhakar Reviewed-by: Biju Das Reviewed-by: Laurent Pinchart Signed-off-by: Biju Das Link: https://lore.kernel.org/r/20250609225630.502888-6-prabhakar.mahadev-lad.rj@bp.renesas.com --- 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 85074e0c3cc4c..d4f2867e0c5f9 100644 --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c @@ -937,7 +937,7 @@ 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");