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ASoC: SOF: amd: Use dedicated MBOX for ACP and PSP communication 

We are currently using generic PSP Mailbox register for sending SHA
complete command to PSP but observe random arbitration issue during
PSP validation as MP0_C2PMSG_26_REG used by other kernel modules.

Use separate mailbox registers and doorbell mechanism to send SHA_DMA
complete command to PSP. This fixes such validation issues and added
flexibility for sending more ACP commands to PSP in future as new mbox
registers i.e MP0_C2PMSG_114_REG and MP0_C2PMSG_73_REG are dedicated
by PSP for ACP communications.

Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220421165820.337207-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Ajit Kumar Pandey 2022-04-21 11:58:20 -05:00 committed by Mark Brown
parent bbdcd3d590
commit d2be77b382
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 25 additions and 5 deletions
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24
sound/soc/sof/amd/acp.c
View File

@ -152,7 +152,7 @@ static int psp_mbox_ready(struct acp_dev_data *adata, bool ack)
for (timeout = ACP_PSP_TIMEOUT_COUNTER; timeout > 0; timeout--) {
msleep(20);
smn_read(adata->smn_dev, MP0_C2PMSG_26_REG, &data);
smn_read(adata->smn_dev, MP0_C2PMSG_114_REG, &data);
if (data & MBOX_READY_MASK)
return 0;
}
@ -173,17 +173,35 @@ static int psp_mbox_ready(struct acp_dev_data *adata, bool ack)
static int psp_send_cmd(struct acp_dev_data *adata, int cmd)
{
int ret;
struct snd_sof_dev *sdev = adata->dev;
int ret, timeout;
u32 data;
if (!cmd)
return -EINVAL;
/* Get a non-zero Doorbell value from PSP */
for (timeout = ACP_PSP_TIMEOUT_COUNTER; timeout > 0; timeout--) {
msleep(MBOX_DELAY);
smn_read(adata->smn_dev, MP0_C2PMSG_73_REG, &data);
if (data)
break;
}
if (!timeout) {
dev_err(sdev->dev, "Failed to get Doorbell from MBOX %x\n", MP0_C2PMSG_73_REG);
return -EINVAL;
}
/* Check if PSP is ready for new command */
ret = psp_mbox_ready(adata, 0);
if (ret)
return ret;
smn_write(adata->smn_dev, MP0_C2PMSG_26_REG, cmd);
smn_write(adata->smn_dev, MP0_C2PMSG_114_REG, cmd);
/* Ring the Doorbell for PSP */
smn_write(adata->smn_dev, MP0_C2PMSG_73_REG, data);
/* Check MBOX ready as PSP ack */
ret = psp_mbox_ready(adata, 1);

6
sound/soc/sof/amd/acp.h
View File

@ -57,8 +57,10 @@
#define ACP_SHA_STAT 0x8000
#define ACP_PSP_TIMEOUT_COUNTER 5
#define ACP_EXT_INTR_ERROR_STAT 0x20000000
#define MP0_C2PMSG_26_REG 0x03810570
#define MBOX_ACP_SHA_DMA_COMMAND 0x330000
#define MP0_C2PMSG_114_REG 0x3810AC8
#define MP0_C2PMSG_73_REG 0x3810A24
#define MBOX_ACP_SHA_DMA_COMMAND 0x70000
#define MBOX_DELAY 1000
#define MBOX_READY_MASK 0x80000000
#define MBOX_STATUS_MASK 0xFFFF