ASoC: SOF: Intel: hda: Add module parameter to disable display audio bind

The SOF audio stack expects working Intel eGPU to probe and to have working
analog audio.
Under special circumstances users or developers can encounter issues of
no i915/Xe driver available and thus the SOF audio card is not probing:
- Booting kernel on a new architecture where the display driver is not yet
  working (cannot even force probed)
- running in virtualized environment without access to eGPU resources
- booting with nomodeset

While the percentage of affected users are small, it can still cause
unreasonable obstacles on their use cases.

With the disable_display_audio_bind=true module parameter the binding can
be disabled to let the SOF stack to probe and provide at least working
analog audio. Obviously the display audio will not work, but that is
expected.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>

Author: ujfalusi

sound/soc/sof/intel/hda.c

@@ -28,6 +28,7 @@
 #include <sound/soc-acpi-intel-ssp-common.h>
 #include <sound/sof.h>
 #include <sound/sof/xtensa.h>
+#include <sound/hda_i915.h>
 #include <sound/hda-mlink.h>
 #include "../sof-audio.h"
 #include "../sof-pci-dev.h"
@@ -41,6 +42,11 @@
 #include <sound/soc-acpi-intel-match.h>
 #endif
 
+static bool disable_display_audio_bind;
+module_param(disable_display_audio_bind, bool, 0444);
+MODULE_PARM_DESC(disable_display_audio_bind,
+		 "Disable i915/Xe display audio component binding");
+
 /* platform specific devices */
 #include "shim.h"
 
@@ -704,6 +710,9 @@ int hda_dsp_probe_early(struct snd_sof_dev *sdev)
 	const struct sof_intel_dsp_desc *chip;
 	int ret = 0;
 
+	if (disable_display_audio_bind)
+		snd_hdac_i915_bind(sof_to_bus(sdev), 0);
+
 	if (!sdev->dspless_mode_selected) {
 		/*
 		 * detect DSP by checking class/subclass/prog-id information