ALSA: hda: add Intel DSP configuration / probe code

For distributions, we need one place where we can decide
which driver will be activated for the auto-configation of the
Intel's HDA hardware with DSP. Actually, we cover three drivers:

* Legacy HDA
* Intel SST
* Intel Sound Open Firmware (SOF)

All those drivers registers similar PCI IDs, so the first
driver probed from the PCI stack can win. But... it is not
guaranteed that the correct driver wins.

This commit changes Intel's NHLT ACPI module to a common
DSP probe module for the Intel's hardware. All above sound
drivers calls this code. The user can force another behaviour
using the module parameter 'dsp_driver' located in
the 'snd-intel-dspcfg' module.

This change allows to add specific dmi checks for the specific
systems. The examples are taken from the pull request:

  https://github.com/thesofproject/linux/pull/927

Tested on Lenovo Carbon X1 7th gen.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191022174313.29087-1-perex@perex.cz
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 15 insertions, 34 deletions

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index e63b871343e5..ca462dd39a48 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -46,7 +46,7 @@
 #include <sound/initval.h>
 #include <sound/hdaudio.h>
 #include <sound/hda_i915.h>
-#include <sound/intel-nhlt.h>
+#include <sound/intel-dsp-config.h>
 #include <linux/vgaarb.h>
 #include <linux/vga_switcheroo.h>
 #include <linux/firmware.h>
@@ -124,7 +124,7 @@ static char *patch[SNDRV_CARDS];
 static bool beep_mode[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] =
 					CONFIG_SND_HDA_INPUT_BEEP_MODE};
 #endif
-static bool dmic_detect = IS_ENABLED(CONFIG_SND_HDA_INTEL_DETECT_DMIC);
+static bool dsp_driver = 1;
 
 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for Intel HD audio interface.");
@@ -159,8 +159,9 @@ module_param_array(beep_mode, bool, NULL, 0444);
 MODULE_PARM_DESC(beep_mode, "Select HDA Beep registration mode "
 			    "(0=off, 1=on) (default=1).");
 #endif
-module_param(dmic_detect, bool, 0444);
-MODULE_PARM_DESC(dmic_detect, "DMIC detect on SKL+ platforms");
+module_param(dsp_driver, bool, 0444);
+MODULE_PARM_DESC(dsp_driver, "Allow DSP driver selection (bypass this driver) "
+			     "(0=off, 1=on) (default=1)");
 
 #ifdef CONFIG_PM
 static int param_set_xint(const char *val, const struct kernel_param *kp);
@@ -2026,25 +2027,6 @@ static const struct hda_controller_ops pci_hda_ops = {
 	.position_check = azx_position_check,
 };
 
-static int azx_check_dmic(struct pci_dev *pci, struct azx *chip)
-{
-	struct nhlt_acpi_table *nhlt;
-	int ret = 0;
-
-	if (chip->driver_type == AZX_DRIVER_SKL &&
-	    pci->class != 0x040300) {
-		nhlt = intel_nhlt_init(&pci->dev);
-		if (nhlt) {
-			if (intel_nhlt_get_dmic_geo(&pci->dev, nhlt)) {
-				ret = -ENODEV;
-				dev_info(&pci->dev, "Digital mics found on Skylake+ platform, aborting probe\n");
-			}
-			intel_nhlt_free(nhlt);
-		}
-	}
-	return ret;
-}
-
 static int azx_probe(struct pci_dev *pci,
 		     const struct pci_device_id *pci_id)
 {
@@ -2062,6 +2044,16 @@ static int azx_probe(struct pci_dev *pci,
 		return -ENOENT;
 	}
 
+	/*
+	 * stop probe if another Intel's DSP driver should be activated
+	 */
+	if (dsp_driver) {
+		err = snd_intel_dsp_driver_probe(pci);
+		if (err != SND_INTEL_DSP_DRIVER_ANY &&
+		    err != SND_INTEL_DSP_DRIVER_LEGACY)
+			return -ENODEV;
+	}
+
 	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
 			   0, &card);
 	if (err < 0) {
@@ -2075,17 +2067,6 @@ static int azx_probe(struct pci_dev *pci,
 	card->private_data = chip;
 	hda = container_of(chip, struct hda_intel, chip);
 
-	/*
-	 * stop probe if digital microphones detected on Skylake+ platform
-	 * with the DSP enabled. This is an opt-in behavior defined at build
-	 * time or at run-time with a module parameter
-	 */
-	if (dmic_detect) {
-		err = azx_check_dmic(pci, chip);
-		if (err < 0)
-			goto out_free;
-	}
-
 	pci_set_drvdata(pci, card);
 
 	err = register_vga_switcheroo(chip);