Hi Prabhakar,
On Mon, May 12, 2025 at 07:23:25PM +0100, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> 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@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
> 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");
--
Regards,
Laurent Pinchart