ASoC: hdac_hda: add HDA patch loader support

HDA patch loader is supported by legacy HDA driver. Implement it on
ASoC HDA driver, too.
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20230919083209.1919921-1-yung-chuan.liao@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/hdac_hda.c

@@ -7,6 +7,7 @@
  * codec drivers using hdac_ext_bus_ops ops.
  */
 
+#include <linux/firmware.h>
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/module.h>
@@ -35,6 +36,13 @@
 				 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
 				 SNDRV_PCM_RATE_192000)
 
+#ifdef CONFIG_SND_HDA_PATCH_LOADER
+static char *loadable_patch[SNDRV_CARDS];
+
+module_param_array_named(patch, loadable_patch, charp, NULL, 0444);
+MODULE_PARM_DESC(patch, "Patch file for Intel HD audio interface.");
+#endif
+
 static int hdac_hda_dai_open(struct snd_pcm_substream *substream,
 			     struct snd_soc_dai *dai);
 static void hdac_hda_dai_close(struct snd_pcm_substream *substream,
@@ -423,6 +431,26 @@ static int hdac_hda_codec_probe(struct snd_soc_component *component)
 		dev_err(&hdev->dev, "failed to create hda codec %d\n", ret);
 		goto error_no_pm;
 	}
+
+#ifdef CONFIG_SND_HDA_PATCH_LOADER
+	if (loadable_patch[hda_pvt->dev_index] && *loadable_patch[hda_pvt->dev_index]) {
+		dev_info(&hdev->dev, "Applying patch firmware '%s'\n",
+			 loadable_patch[hda_pvt->dev_index]);
+		ret = request_firmware(&hda_pvt->fw, loadable_patch[hda_pvt->dev_index],
+				       &hdev->dev);
+		if (ret < 0)
+			goto error_no_pm;
+		if (hda_pvt->fw) {
+			ret = snd_hda_load_patch(hcodec->bus, hda_pvt->fw->size, hda_pvt->fw->data);
+			if (ret < 0) {
+				dev_err(&hdev->dev, "failed to load hda patch %d\n", ret);
+				goto error_no_pm;
+			}
+			release_firmware(hda_pvt->fw);
+			hda_pvt->fw = NULL;
+		}
+	}
+#endif
 	/*
 	 * Overwrite type to HDA_DEV_ASOC since it is a ASoC driver
 	 * hda_codec.c will check this flag to determine if unregister

sound/soc/codecs/hdac_hda.h

@@ -26,6 +26,10 @@ struct hdac_hda_priv {
 	struct hda_codec *codec;
 	struct hdac_hda_pcm pcm[HDAC_DAI_ID_NUM];
 	bool need_display_power;
+	int dev_index;
+#ifdef CONFIG_SND_HDA_PATCH_LOADER
+	const struct firmware *fw;
+#endif
 };
 
 struct hdac_ext_bus_ops *snd_soc_hdac_hda_get_ops(void);

sound/soc/intel/skylake/skl.c

@@ -736,6 +736,7 @@ static int probe_codec(struct hdac_bus *bus, int addr)
 		return PTR_ERR(codec);
 
 	hda_codec->codec = codec;
+	hda_codec->dev_index = addr;
 	dev_set_drvdata(&codec->core.dev, hda_codec);
 
 	/* use legacy bus only for HDA codecs, idisp uses ext bus */

sound/soc/sof/intel/hda-codec.c

@@ -169,6 +169,7 @@ static int hda_codec_probe(struct snd_sof_dev *sdev, int address)
 		return ret;
 
 	hda_priv->codec = codec;
+	hda_priv->dev_index = address;
 	dev_set_drvdata(&codec->core.dev, hda_priv);
 
 	if ((resp & 0xFFFF0000) == IDISP_VID_INTEL) {