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Date: Wed, 17 Nov 2010 15:58:45 +0000
From: Alan Cox <alan@...rguk.ukuu.org.uk>
To: greg@...ah.com, linux-kernel@...r.kernel.org
Subject: [PATCH 3/7] sst: Add runtime PM support
From: Vinod Koul <vinod.koul@...el.com>
This adds runtime PM support for audio driver.
This also fixes LPA audio mode for moorestown platform
Signed-off-by: Vinod Koul <vinod.koul@...el.com>
Signed-off-by: Alan Cox <alan@...ux.intel.com>
---
drivers/staging/intel_sst/intel_sst.c | 44 ++++++++++++++++++--
.../staging/intel_sst/intel_sst_app_interface.c | 13 +++++-
drivers/staging/intel_sst/intel_sst_common.h | 1
.../staging/intel_sst/intel_sst_drv_interface.c | 13 +++++-
drivers/staging/intel_sst/intel_sst_dsp.c | 3 +
drivers/staging/intel_sst/intel_sst_ipc.c | 1
6 files changed, 67 insertions(+), 8 deletions(-)
diff --git a/drivers/staging/intel_sst/intel_sst.c b/drivers/staging/intel_sst/intel_sst.c
index 24d3928..92e30f6 100644
--- a/drivers/staging/intel_sst/intel_sst.c
+++ b/drivers/staging/intel_sst/intel_sst.c
@@ -34,6 +34,7 @@
#include <linux/interrupt.h>
#include <linux/firmware.h>
#include <linux/miscdevice.h>
+#include <linux/pm_runtime.h>
#include <asm/mrst.h>
#include "intel_sst.h"
#include "intel_sst_ioctl.h"
@@ -318,6 +319,9 @@ static int __devinit intel_sst_probe(struct pci_dev *pci,
}
}
sst_drv_ctx->lpe_stalled = 0;
+ pm_runtime_set_active(&pci->dev);
+ pm_runtime_enable(&pci->dev);
+ pm_runtime_allow(&pci->dev);
pr_debug("sst: ...successfully done!!!\n");
return ret;
@@ -405,9 +409,10 @@ int intel_sst_suspend(struct pci_dev *pci, pm_message_t state)
union config_status_reg csr;
pr_debug("sst: intel_sst_suspend called\n");
-
- if (sst_drv_ctx->pb_streams != 0 || sst_drv_ctx->cp_streams != 0)
- return -EPERM;
+ if (sst_drv_ctx->stream_cnt) {
+ pr_err("sst: active streams,not able to suspend\n");
+ return -EBUSY;
+ }
/*Assert RESET on LPE Processor*/
csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
csr.full = csr.full | 0x2;
@@ -437,7 +442,7 @@ int intel_sst_resume(struct pci_dev *pci)
pr_debug("sst: intel_sst_resume called\n");
if (sst_drv_ctx->sst_state != SST_SUSPENDED) {
pr_err("sst: SST is not in suspended state\n");
- return -EPERM;
+ return 0;
}
sst_drv_ctx = pci_get_drvdata(pci);
pci_set_power_state(pci, PCI_D0);
@@ -452,6 +457,34 @@ int intel_sst_resume(struct pci_dev *pci)
return 0;
}
+static int intel_sst_runtime_suspend(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ pr_debug("sst: runtime_suspend called\n");
+ return intel_sst_suspend(pci_dev, PMSG_SUSPEND);
+}
+
+static int intel_sst_runtime_resume(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ pr_debug("sst: runtime_resume called\n");
+ return intel_sst_resume(pci_dev);
+}
+
+static int intel_sst_runtime_idle(struct device *dev)
+{
+ pr_debug("sst: runtime_idle called\n");
+ if (sst_drv_ctx->stream_cnt == 0 && sst_drv_ctx->am_cnt == 0)
+ pm_schedule_suspend(dev, SST_SUSPEND_DELAY);
+ return -EBUSY;
+}
+
+static const struct dev_pm_ops intel_sst_pm = {
+ .runtime_suspend = intel_sst_runtime_suspend,
+ .runtime_resume = intel_sst_runtime_resume,
+ .runtime_idle = intel_sst_runtime_idle,
+};
+
/* PCI Routines */
static struct pci_device_id intel_sst_ids[] = {
{ PCI_VDEVICE(INTEL, SST_MRST_PCI_ID), 3},
@@ -468,6 +501,9 @@ static struct pci_driver driver = {
#ifdef CONFIG_PM
.suspend = intel_sst_suspend,
.resume = intel_sst_resume,
+ .driver = {
+ .pm = &intel_sst_pm,
+ },
#endif
};
diff --git a/drivers/staging/intel_sst/intel_sst_app_interface.c b/drivers/staging/intel_sst/intel_sst_app_interface.c
index 60aca55..9aac69f 100644
--- a/drivers/staging/intel_sst/intel_sst_app_interface.c
+++ b/drivers/staging/intel_sst/intel_sst_app_interface.c
@@ -33,6 +33,7 @@
#include <linux/aio.h>
#include <linux/uaccess.h>
#include <linux/firmware.h>
+#include <linux/pm_runtime.h>
#include <linux/ioctl.h>
#ifdef CONFIG_MRST_RAR_HANDLER
#include "../rar_register/rar_register.h"
@@ -100,8 +101,10 @@ int intel_sst_open(struct inode *i_node, struct file *file_ptr)
unsigned int retval;
mutex_lock(&sst_drv_ctx->stream_lock);
+ pm_runtime_get_sync(&sst_drv_ctx->pci->dev);
retval = intel_sst_check_device();
if (retval) {
+ pm_runtime_put(&sst_drv_ctx->pci->dev);
mutex_unlock(&sst_drv_ctx->stream_lock);
return retval;
}
@@ -110,6 +113,7 @@ int intel_sst_open(struct inode *i_node, struct file *file_ptr)
struct ioctl_pvt_data *data =
kzalloc(sizeof(struct ioctl_pvt_data), GFP_KERNEL);
if (!data) {
+ pm_runtime_put(&sst_drv_ctx->pci->dev);
mutex_unlock(&sst_drv_ctx->stream_lock);
return -ENOMEM;
}
@@ -122,6 +126,7 @@ int intel_sst_open(struct inode *i_node, struct file *file_ptr)
pr_debug("sst: pvt_id handle = %d!\n", data->pvt_id);
} else {
retval = -EUSERS;
+ pm_runtime_put(&sst_drv_ctx->pci->dev);
mutex_unlock(&sst_drv_ctx->stream_lock);
}
return retval;
@@ -144,8 +149,10 @@ int intel_sst_open_cntrl(struct inode *i_node, struct file *file_ptr)
/* audio manager open */
mutex_lock(&sst_drv_ctx->stream_lock);
+ pm_runtime_get_sync(&sst_drv_ctx->pci->dev);
retval = intel_sst_check_device();
if (retval) {
+ pm_runtime_put(&sst_drv_ctx->pci->dev);
mutex_unlock(&sst_drv_ctx->stream_lock);
return retval;
}
@@ -154,8 +161,10 @@ int intel_sst_open_cntrl(struct inode *i_node, struct file *file_ptr)
sst_drv_ctx->am_cnt++;
pr_debug("sst: AM handle opened...\n");
file_ptr->private_data = NULL;
- } else
+ } else {
retval = -EACCES;
+ pm_runtime_put(&sst_drv_ctx->pci->dev);
+ }
mutex_unlock(&sst_drv_ctx->stream_lock);
return retval;
@@ -178,6 +187,7 @@ int intel_sst_release(struct inode *i_node, struct file *file_ptr)
mutex_lock(&sst_drv_ctx->stream_lock);
sst_drv_ctx->encoded_cnt--;
sst_drv_ctx->stream_cnt--;
+ pm_runtime_put(&sst_drv_ctx->pci->dev);
mutex_unlock(&sst_drv_ctx->stream_lock);
free_stream_context(data->str_id);
kfree(data);
@@ -189,6 +199,7 @@ int intel_sst_release_cntrl(struct inode *i_node, struct file *file_ptr)
/* audio manager close */
mutex_lock(&sst_drv_ctx->stream_lock);
sst_drv_ctx->am_cnt--;
+ pm_runtime_put(&sst_drv_ctx->pci->dev);
mutex_unlock(&sst_drv_ctx->stream_lock);
pr_debug("sst: AM handle closed\n");
return 0;
diff --git a/drivers/staging/intel_sst/intel_sst_common.h b/drivers/staging/intel_sst/intel_sst_common.h
index dcc1ebb..a828824 100644
--- a/drivers/staging/intel_sst/intel_sst_common.h
+++ b/drivers/staging/intel_sst/intel_sst_common.h
@@ -37,6 +37,7 @@
#define SST_FW_FILENAME_MFLD "fw_sst_082f.bin"
#define SST_MRST_PCI_ID 0x080A
#define SST_MFLD_PCI_ID 0x082F
+#define SST_SUSPEND_DELAY 2000
enum sst_states {
SST_FW_LOADED = 1,
diff --git a/drivers/staging/intel_sst/intel_sst_drv_interface.c b/drivers/staging/intel_sst/intel_sst_drv_interface.c
index 22b95ca..1ff6420 100644
--- a/drivers/staging/intel_sst/intel_sst_drv_interface.c
+++ b/drivers/staging/intel_sst/intel_sst_drv_interface.c
@@ -30,6 +30,7 @@
#include <linux/pci.h>
#include <linux/fs.h>
#include <linux/firmware.h>
+#include <linux/pm_runtime.h>
#include "intel_sst.h"
#include "intel_sst_ioctl.h"
#include "intel_sst_fw_ipc.h"
@@ -308,12 +309,15 @@ int sst_open_pcm_stream(struct snd_sst_params *str_param)
struct stream_info *str_info;
int retval;
+ pm_runtime_get_sync(&sst_drv_ctx->pci->dev);
+
if (sst_drv_ctx->sst_state == SST_SUSPENDED) {
/*LPE is suspended, resume it before proceding*/
pr_debug("sst: Resuming from Suspended state\n");
retval = intel_sst_resume(sst_drv_ctx->pci);
if (retval) {
pr_err("sst: Resume Failed = %#x, abort\n", retval);
+ pm_runtime_put(&sst_drv_ctx->pci->dev);
return retval;
}
}
@@ -323,21 +327,25 @@ int sst_open_pcm_stream(struct snd_sst_params *str_param)
retval = sst_download_fw();
if (retval) {
pr_err("sst: FW download fail %x, abort\n", retval);
+ pm_runtime_put(&sst_drv_ctx->pci->dev);
return retval;
}
send_intial_rx_timeslot();
}
- if (!str_param)
+ if (!str_param) {
+ pm_runtime_put(&sst_drv_ctx->pci->dev);
return -EINVAL;
+ }
retval = sst_get_stream(str_param);
if (retval > 0) {
sst_drv_ctx->stream_cnt++;
str_info = &sst_drv_ctx->streams[retval];
str_info->src = MAD_DRV;
+ } else
+ pm_runtime_put(&sst_drv_ctx->pci->dev);
- }
return retval;
}
@@ -363,6 +371,7 @@ int sst_close_pcm_stream(unsigned int str_id)
stream->period_elapsed = NULL;
sst_drv_ctx->stream_cnt--;
pr_debug("sst: will call runtime put now\n");
+ pm_runtime_put(&sst_drv_ctx->pci->dev);
return 0;
}
/*
diff --git a/drivers/staging/intel_sst/intel_sst_dsp.c b/drivers/staging/intel_sst/intel_sst_dsp.c
index d80a6ee..5149cf1 100644
--- a/drivers/staging/intel_sst/intel_sst_dsp.c
+++ b/drivers/staging/intel_sst/intel_sst_dsp.c
@@ -48,7 +48,8 @@ static int intel_sst_reset_dsp_mrst(void)
union config_status_reg csr;
pr_debug("sst: Resetting the DSP in mrst\n");
- csr.full = 0x3a2;
+ csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
+ csr.full |= 0x382;
sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
csr.part.strb_cntr_rst = 0;
diff --git a/drivers/staging/intel_sst/intel_sst_ipc.c b/drivers/staging/intel_sst/intel_sst_ipc.c
index 39c67fa..37c6505 100644
--- a/drivers/staging/intel_sst/intel_sst_ipc.c
+++ b/drivers/staging/intel_sst/intel_sst_ipc.c
@@ -180,6 +180,7 @@ int process_fw_init(struct sst_ipc_msg_wq *msg)
sst_send_sound_card_type();
mutex_lock(&sst_drv_ctx->sst_lock);
sst_drv_ctx->sst_state = SST_FW_RUNNING;
+ sst_drv_ctx->lpe_stalled = 0;
mutex_unlock(&sst_drv_ctx->sst_lock);
pr_debug("sst: FW Version %x.%x\n",
init->fw_version.major, init->fw_version.minor);
--
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