linux-kernel - [PATCH 1/5] ASoC: amd: vangogh: Drop conflicting ACPI-based probing

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Message-ID: <20231209203229.878730-2-cristian.ciocaltea@collabora.com>
Date:   Sat,  9 Dec 2023 22:32:19 +0200
From:   Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Venkata Prasad Potturu <venkataprasad.potturu@....com>,
        Marian Postevca <posteuca@...ex.one>,
        Vijendar Mukunda <Vijendar.Mukunda@....com>,
        Syed Saba Kareem <Syed.SabaKareem@....com>,
        Alper Nebi Yasak <alpernebiyasak@...il.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Rander Wang <rander.wang@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Daniel Baluta <daniel.baluta@....com>,
        Ajit Kumar Pandey <AjitKumar.Pandey@....com>,
        Bard Liao <bard.liao@...el.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>
Cc:     linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com
Subject: [PATCH 1/5] ASoC: amd: vangogh: Drop conflicting ACPI-based probing

The Vangogh machine driver variant based on the MAX98388 amplifier, as
found on Valve's Steam Deck OLED, relies on probing via an ACPI match
table.  This worked fine until commit 197b1f7f0df1 ("ASoC: amd: Add new
dmi entries to config entry") enabled SOF support for the target machine
(i.e. Galileo product), causing the sound card to enter the deferred
probe state indefinitely:

$ cat /sys/kernel/debug/devices_deferred
AMDI8821:00	acp5x_mach: Register card (acp5x-max98388) failed

The issue is related to commit e89f45edb747 ("ASoC: amd: vangogh: Add
check for acp config flags in vangogh platform"), which tries to
mitigate potential conflicts between SOF and generic ACP Vangogh
drivers, due to sharing the PCI device IDs.

However, the solution is effective only if the machine driver is
directly probed by pci-acp5x through platform_device_register_full().

Hence, remove the conflicting ACPI based probing and rely exclusively on
DMI quirks for sound card setup.

Fixes: dba22efd0d17 ("ASoC: amd: vangogh: Add support for NAU8821/MAX98388 variant")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
---
 sound/soc/amd/vangogh/acp5x-mach.c | 35 +++++++++++-------------------
 1 file changed, 13 insertions(+), 22 deletions(-)

diff --git a/sound/soc/amd/vangogh/acp5x-mach.c b/sound/soc/amd/vangogh/acp5x-mach.c
index de4b478a983d..7878e061ecb9 100644
--- a/sound/soc/amd/vangogh/acp5x-mach.c
+++ b/sound/soc/amd/vangogh/acp5x-mach.c
@@ -439,7 +439,15 @@ static const struct dmi_system_id acp5x_vg_quirk_table[] = {
 		.matches = {
 			DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "Valve"),
 			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Jupiter"),
-		}
+		},
+		.driver_data = (void *)&acp5x_8821_35l41_card,
+	},
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "Valve"),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Galileo"),
+		},
+		.driver_data = (void *)&acp5x_8821_98388_card,
 	},
 	{}
 };
@@ -452,25 +460,15 @@ static int acp5x_probe(struct platform_device *pdev)
 	struct snd_soc_card *card;
 	int ret;
 
-	card = (struct snd_soc_card *)device_get_match_data(dev);
-	if (!card) {
-		/*
-		 * This is normally the result of directly probing the driver
-		 * in pci-acp5x through platform_device_register_full(), which
-		 * is necessary for the CS35L41 variant, as it doesn't support
-		 * ACPI probing and relies on DMI quirks.
-		 */
-		dmi_id = dmi_first_match(acp5x_vg_quirk_table);
-		if (!dmi_id)
-			return -ENODEV;
-
-		card = &acp5x_8821_35l41_card;
-	}
+	dmi_id = dmi_first_match(acp5x_vg_quirk_table);
+	if (!dmi_id || !dmi_id->driver_data)
+		return -ENODEV;
 
 	machine = devm_kzalloc(dev, sizeof(*machine), GFP_KERNEL);
 	if (!machine)
 		return -ENOMEM;
 
+	card = dmi_id->driver_data;
 	card->dev = dev;
 	platform_set_drvdata(pdev, card);
 	snd_soc_card_set_drvdata(card, machine);
@@ -482,17 +480,10 @@ static int acp5x_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static const struct acpi_device_id acp5x_acpi_match[] = {
-	{ "AMDI8821", (kernel_ulong_t)&acp5x_8821_98388_card },
-	{},
-};
-MODULE_DEVICE_TABLE(acpi, acp5x_acpi_match);
-
 static struct platform_driver acp5x_mach_driver = {
 	.driver = {
 		.name = DRV_NAME,
 		.pm = &snd_soc_pm_ops,
-		.acpi_match_table = acp5x_acpi_match,
 	},
 	.probe = acp5x_probe,
 };
-- 
2.43.0