[PATCH v2 02/10] ASoC: amd: acp: add acp i2s master clock generation for rembrandt platform

From: Syed Saba Kareem
Date: Mon Jun 26 2023 - 09:56:22 EST


Add acp i2s master clock generation logic for rembrandt platform.

Signed-off-by: V Sujith Kumar Reddy <vsujithkumar.reddy@xxxxxxx>
Signed-off-by: Syed Saba Kareem <Syed.SabaKareem@xxxxxxx>
---
sound/soc/amd/acp/acp-legacy-common.c | 19 +++++++++++++++++++
sound/soc/amd/acp/acp-rembrandt.c | 26 ++++++++++++++++++++++++++
sound/soc/amd/acp/amd.h | 3 +++
3 files changed, 48 insertions(+)

diff --git a/sound/soc/amd/acp/acp-legacy-common.c b/sound/soc/amd/acp/acp-legacy-common.c
index 5b7000eae693..4302d8db88a4 100644
--- a/sound/soc/amd/acp/acp-legacy-common.c
+++ b/sound/soc/amd/acp/acp-legacy-common.c
@@ -13,6 +13,7 @@
*/

#include "amd.h"
+#include <linux/pci.h>
#include <linux/export.h>

static int acp_power_on(struct acp_chip_info *chip)
@@ -96,4 +97,22 @@ int acp_deinit(void __iomem *base)
}
EXPORT_SYMBOL_NS_GPL(acp_deinit, SND_SOC_ACP_COMMON);

+int smn_write(struct pci_dev *dev, u32 smn_addr, u32 data)
+{
+ pci_write_config_dword(dev, 0x60, smn_addr);
+ pci_write_config_dword(dev, 0x64, data);
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(smn_write, SND_SOC_ACP_COMMON);
+
+int smn_read(struct pci_dev *dev, u32 smn_addr)
+{
+ u32 data;
+
+ pci_write_config_dword(dev, 0x60, smn_addr);
+ pci_read_config_dword(dev, 0x64, &data);
+ return data;
+}
+EXPORT_SYMBOL_NS_GPL(smn_read, SND_SOC_ACP_COMMON);
+
MODULE_LICENSE("Dual BSD/GPL");
diff --git a/sound/soc/amd/acp/acp-rembrandt.c b/sound/soc/amd/acp/acp-rembrandt.c
index 59b1653b8479..82a1bf2ddfc6 100644
--- a/sound/soc/amd/acp/acp-rembrandt.c
+++ b/sound/soc/amd/acp/acp-rembrandt.c
@@ -19,11 +19,17 @@
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <linux/dma-mapping.h>
+#include <linux/pci.h>

#include "amd.h"

#define DRV_NAME "acp_asoc_rembrandt"

+#define MP1_C2PMSG_69 0x3B10A14
+#define MP1_C2PMSG_85 0x3B10A54
+#define MP1_C2PMSG_93 0x3B10A74
+#define HOST_BRIDGE_ID 0x14B5
+
static struct acp_resource rsrc = {
.offset = 0,
.no_of_ctrls = 2,
@@ -160,6 +166,25 @@ static struct snd_soc_dai_driver acp_rmb_dai[] = {
},
};

+static int acp6x_master_clock_generate(struct device *dev)
+{
+ int data = 0;
+ struct pci_dev *smn_dev;
+
+ smn_dev = pci_get_device(PCI_VENDOR_ID_AMD, HOST_BRIDGE_ID, NULL);
+ if (!smn_dev) {
+ dev_err(dev, "Failed to get host bridge device\n");
+ return -ENODEV;
+ }
+
+ smn_write(smn_dev, MP1_C2PMSG_93, 0);
+ smn_write(smn_dev, MP1_C2PMSG_85, 0xC4);
+ smn_write(smn_dev, MP1_C2PMSG_69, 0x4);
+ read_poll_timeout(smn_read, data, data, DELAY_US,
+ ACP_TIMEOUT, false, smn_dev, MP1_C2PMSG_93);
+ return 0;
+}
+
static void acp6x_enable_interrupts(struct acp_dev_data *adata)
{
struct acp_resource *rsrc = adata->rsrc;
@@ -228,6 +253,7 @@ static int rembrandt_audio_probe(struct platform_device *pdev)
acp_machine_select(adata);

dev_set_drvdata(dev, adata);
+ acp6x_master_clock_generate(dev);
acp6x_enable_interrupts(adata);
acp_platform_register(dev);

diff --git a/sound/soc/amd/acp/amd.h b/sound/soc/amd/acp/amd.h
index 83c9a3ba8584..96bd87290eee 100644
--- a/sound/soc/amd/acp/amd.h
+++ b/sound/soc/amd/acp/amd.h
@@ -187,6 +187,9 @@ int acp_platform_unregister(struct device *dev);

int acp_machine_select(struct acp_dev_data *adata);

+int smn_read(struct pci_dev *dev, u32 smn_addr);
+int smn_write(struct pci_dev *dev, u32 smn_addr, u32 data);
+
int acp_init(struct acp_chip_info *chip);
int acp_deinit(void __iomem *base);
/* Machine configuration */
--
2.25.1