ASoC: Intel: Skylake: add error logs on probe, remove dependency on NHLT

Add error logs to make probe debug easier.

Also remove hard-coded dependency on NHLT. NHLT literally stands for
NonHdaudioLinkTable and is only required for SSP/DMIC interfaces.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/skylake/skl-nhlt.c

@@ -180,6 +180,9 @@ int skl_get_dmic_geo(struct skl *skl)
 	unsigned int dmic_geo = 0;
 	u8 j;
 
+	if (!nhlt)
+		return 0;
+
 	epnt = (struct nhlt_endpoint *)nhlt->desc;
 
 	for (j = 0; j < nhlt->endpoint_count; j++) {

sound/soc/intel/skylake/skl.c

@@ -1010,8 +1010,10 @@ static int skl_probe(struct pci_dev *pci,
 	bus = skl_to_bus(skl);
 
 	err = skl_first_init(bus);
-	if (err < 0)
+	if (err < 0) {
+		dev_err(bus->dev, "skl_first_init failed with err: %d\n", err);
 		goto out_free;
+	}
 
 	skl->pci_id = pci->device;
 
@@ -1020,26 +1022,39 @@ static int skl_probe(struct pci_dev *pci,
 	skl->nhlt = skl_nhlt_init(bus->dev);
 
 	if (skl->nhlt == NULL) {
+#if !IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
+		dev_err(bus->dev, "no nhlt info found\n");
 		err = -ENODEV;
 		goto out_free;
-	}
+#else
+		dev_warn(bus->dev, "no nhlt info found, continuing to try to enable HDaudio codec\n");
+#endif
+	} else {
 
-	err = skl_nhlt_create_sysfs(skl);
-	if (err < 0)
-		goto out_nhlt_free;
+		err = skl_nhlt_create_sysfs(skl);
+		if (err < 0) {
+			dev_err(bus->dev, "skl_nhlt_create_sysfs failed with err: %d\n", err);
+			goto out_nhlt_free;
+		}
 
-	skl_nhlt_update_topology_bin(skl);
+		skl_nhlt_update_topology_bin(skl);
+
+		/* create device for dsp clk */
+		err = skl_clock_device_register(skl);
+		if (err < 0) {
+			dev_err(bus->dev, "skl_clock_device_register failed with err: %d\n", err);
+			goto out_clk_free;
+		}
+	}
 
 	pci_set_drvdata(skl->pci, bus);
 
-	/* create device for dsp clk */
-	err = skl_clock_device_register(skl);
-	if (err < 0)
-		goto out_clk_free;
 
 	err = skl_find_machine(skl, (void *)pci_id->driver_data);
-	if (err < 0)
+	if (err < 0) {
+		dev_err(bus->dev, "skl_find_machine failed with err: %d\n", err);
 		goto out_nhlt_free;
+	}
 
 	err = skl_init_dsp(skl);
 	if (err < 0) {
@@ -1056,8 +1071,10 @@ static int skl_probe(struct pci_dev *pci,
 
 	/* create device for soc dmic */
 	err = skl_dmic_device_register(skl);
-	if (err < 0)
+	if (err < 0) {
+		dev_err(bus->dev, "skl_dmic_device_register failed with err: %d\n", err);
 		goto out_dsp_free;
+	}
 
 	schedule_work(&skl->probe_work);