Hi Heiko,

On Tue, 18 Feb 2025 11:00:57 +0100, Heiko Stübnerwrote:

So I guess step1, check what error is actually returned.

I have checked that the return value is -517:

rockchip-drm display-subsystem: [drm] *ERROR* failed to get pll_hdmiphy1 with -517

Step2 check if clk_get_optional need to be adapted or alternatively
catch the error in the vop2 and set the clock to NULL ourself in that case.

I tried the following patch to set the clock to NULL when clk_get_optional
failed with value -517, and hdmi0 is working now. There are also some
boards like rock 5 itx which only use hdmi1, I think we should also add
this logic to vop2->pll_hdmiphy0.

@@ -3733,6 +3751,15 @@ static int vop2_bind(struct device *dev, struct device *master, void *data)
 		return PTR_ERR(vop2->pll_hdmiphy0);
 	}
 
+	vop2->pll_hdmiphy1 = devm_clk_get_optional(vop2->dev, "pll_hdmiphy1");
+	if (IS_ERR(vop2->pll_hdmiphy1)) {
+		drm_err(vop2->drm, "failed to get pll_hdmiphy1 with %d\n", vop2->pll_hdmiphy1);
+		if (vop2->pll_hdmiphy1 == -EPROBE_DEFER)
+			vop2->pll_hdmiphy1 = NULL;
+		else
+			return PTR_ERR(vop2->pll_hdmiphy1);
+	}
+
 	vop2->irq = platform_get_irq(pdev, 0);
 	if (vop2->irq < 0) {
 		drm_err(vop2->drm, "cannot find irq for vop2\n");

Best regards,
Jianfeng