linux-kernel - [PATCH AUTOSEL 5.15 04/23] ASoC: amd: vangogh: Add check for acp config flags in vangogh platform

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Message-Id: <20230724012334.2317140-4-sashal@kernel.org>
Date:   Sun, 23 Jul 2023 21:23:15 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Venkata Prasad Potturu <venkataprasad.potturu@....com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>, lgirdwood@...il.com,
        perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org
Subject: [PATCH AUTOSEL 5.15 04/23] ASoC: amd: vangogh: Add check for acp config flags in vangogh platform

From: Venkata Prasad Potturu <venkataprasad.potturu@....com>

[ Upstream commit e89f45edb747ed88e97a5771dd6d3dd1eb517873 ]

We have SOF and generic ACP support enabled for Vangogh platform
on some machines. Since we have same PCI id used for probing,
add check for machine configuration flag to avoid conflict with
newer pci drivers. Such machine flag has been initialized via
dmi match on few Vangogh based machines. If no flag is
specified probe and register older platform device.

Signed-off-by: Venkata Prasad Potturu <venkataprasad.potturu@....com>
Link: https://lore.kernel.org/r/20230530110802.674939-1-venkataprasad.potturu@amd.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/amd/vangogh/acp5x.h     | 2 ++
 sound/soc/amd/vangogh/pci-acp5x.c | 7 ++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/sound/soc/amd/vangogh/acp5x.h b/sound/soc/amd/vangogh/acp5x.h
index a808635f97400..ac9827393c453 100644
--- a/sound/soc/amd/vangogh/acp5x.h
+++ b/sound/soc/amd/vangogh/acp5x.h
@@ -145,6 +145,8 @@ static inline void acp_writel(u32 val, void __iomem *base_addr)
 	writel(val, base_addr - ACP5x_PHY_BASE_ADDRESS);
 }
 
+int snd_amd_acp_find_config(struct pci_dev *pci);
+
 static inline u64 acp_get_byte_count(struct i2s_stream_instance *rtd,
 				     int direction)
 {
diff --git a/sound/soc/amd/vangogh/pci-acp5x.c b/sound/soc/amd/vangogh/pci-acp5x.c
index a57b762d9f2e1..1b4bf357f2015 100644
--- a/sound/soc/amd/vangogh/pci-acp5x.c
+++ b/sound/soc/amd/vangogh/pci-acp5x.c
@@ -121,10 +121,15 @@ static int snd_acp5x_probe(struct pci_dev *pci,
 {
 	struct acp5x_dev_data *adata;
 	struct platform_device_info pdevinfo[ACP5x_DEVS];
-	unsigned int irqflags;
+	unsigned int irqflags, flag;
 	int ret, i;
 	u32 addr, val;
 
+	/* Return if acp config flag is defined */
+	flag = snd_amd_acp_find_config(pci);
+	if (flag)
+		return -ENODEV;
+
 	irqflags = IRQF_SHARED;
 	if (pci->revision != 0x50)
 		return -ENODEV;
-- 
2.39.2