xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ALSA: asihpi: Add support for stream interrupt.

Browse Source 
Some cards have a so-called low-latency mode, in which they present
a single multichannel stream with no mixing or samplerate conversion.
In this mode the card can generate an interrupt per internal processing
block (typically 32 or 64 frames)

Signed-off-by: Eliot Blennerhassett <eliot@blennerhassett.gen.nz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Eliot Blennerhassett
2014-11-20 16:22:53 +13:00
committed by Takashi Iwai
parent c1464a8854
commit f9a376c3f6
6 changed files with 321 additions and 50 deletions
Download Patch File Download Diff File Expand all files Collapse all files

124
sound/pci/asihpi/hpioctl.c
View File

@@ -1,7 +1,8 @@
/*******************************************************************************
AudioScience HPI driver
Copyright (C) 1997-2011 AudioScience Inc. <support@audioscience.com>
Common Linux HPI ioctl and module probe/remove functions
Copyright (C) 1997-2014 AudioScience Inc. <support@audioscience.com>
This program is free software; you can redistribute it and/or modify
it under the terms of version 2 of the GNU General Public License as
@@ -12,11 +13,6 @@
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Common Linux HPI ioctl and module probe/remove functions
*******************************************************************************/
#define SOURCEFILE_NAME "hpioctl.c"
@@ -29,6 +25,7 @@ Common Linux HPI ioctl and module probe/remove functions
#include "hpicmn.h"
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/moduleparam.h>
#include <asm/uaccess.h>
@@ -307,10 +304,38 @@ out:
return err;
}
static int asihpi_irq_count;
static irqreturn_t asihpi_isr(int irq, void *dev_id)
{
struct hpi_adapter *a = dev_id;
int handled;
if (!a->adapter->irq_query_and_clear) {
pr_err("asihpi_isr ASI%04X:%d no handler\n", a->adapter->type,
a->adapter->index);
return IRQ_NONE;
}
handled = a->adapter->irq_query_and_clear(a->adapter, 0);
if (!handled)
return IRQ_NONE;
asihpi_irq_count++;
/* printk(KERN_INFO "asihpi_isr %d ASI%04X:%d irq handled\n",
asihpi_irq_count, a->adapter->type, a->adapter->index); */
if (a->interrupt_callback)
a->interrupt_callback(a);
return IRQ_HANDLED;
}
int asihpi_adapter_probe(struct pci_dev *pci_dev,
const struct pci_device_id *pci_id)
{
int idx, nm;
int idx, nm, low_latency_mode = 0, irq_supported = 0;
int adapter_index;
unsigned int memlen;
struct hpi_message hm;
@@ -388,8 +413,39 @@ int asihpi_adapter_probe(struct pci_dev *pci_dev,
hm.adapter_index = adapter.adapter->index;
hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
if (hr.error)
if (hr.error) {
HPI_DEBUG_LOG(ERROR, "HPI_ADAPTER_OPEN failed, aborting\n");
goto err;
}
/* Check if current mode == Low Latency mode */
hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
HPI_ADAPTER_GET_MODE);
hm.adapter_index = adapter.adapter->index;
hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
if (hr.error) {
HPI_DEBUG_LOG(ERROR,
"HPI_ADAPTER_GET_MODE failed, aborting\n");
goto err;
}
if (hr.u.ax.mode.adapter_mode == HPI_ADAPTER_MODE_LOW_LATENCY)
low_latency_mode = 1;
/* Check if IRQs are supported */
hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
HPI_ADAPTER_GET_PROPERTY);
hm.adapter_index = adapter.adapter->index;
hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_SUPPORTS_IRQ;
hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
if (hr.error || !hr.u.ax.property_get.parameter1) {
dev_info(&pci_dev->dev,
"IRQs not supported by adapter at index %d\n",
adapter.adapter->index);
} else {
irq_supported = 1;
}
/* WARNING can't init mutex in 'adapter'
* and then copy it to adapters[] ?!?!
@@ -398,6 +454,44 @@ int asihpi_adapter_probe(struct pci_dev *pci_dev,
mutex_init(&adapters[adapter_index].mutex);
pci_set_drvdata(pci_dev, &adapters[adapter_index]);
if (low_latency_mode && irq_supported) {
if (!adapter.adapter->irq_query_and_clear) {
dev_err(&pci_dev->dev,
"no IRQ handler for adapter %d, aborting\n",
adapter.adapter->index);
goto err;
}
/* Disable IRQ generation on DSP side by setting the rate to 0 */
hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
HPI_ADAPTER_SET_PROPERTY);
hm.adapter_index = adapter.adapter->index;
hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE;
hm.u.ax.property_set.parameter1 = 0;
hm.u.ax.property_set.parameter2 = 0;
hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
if (hr.error) {
HPI_DEBUG_LOG(ERROR,
"HPI_ADAPTER_GET_MODE failed, aborting\n");
goto err;
}
/* Note: request_irq calls asihpi_isr here */
if (request_irq(pci_dev->irq, asihpi_isr, IRQF_SHARED,
"asihpi", &adapters[adapter_index])) {
dev_err(&pci_dev->dev, "request_irq(%d) failed\n",
pci_dev->irq);
goto err;
}
adapters[adapter_index].interrupt_mode = 1;
dev_info(&pci_dev->dev, "using irq %d\n", pci_dev->irq);
adapters[adapter_index].irq = pci_dev->irq;
} else {
dev_info(&pci_dev->dev, "using polled mode\n");
}
dev_info(&pci_dev->dev, "probe succeeded for ASI%04X HPI index %d\n",
adapter.adapter->type, adapter_index);
@@ -431,6 +525,15 @@ void asihpi_adapter_remove(struct pci_dev *pci_dev)
pa = pci_get_drvdata(pci_dev);
pci = pa->adapter->pci;
/* Disable IRQ generation on DSP side */
hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
HPI_ADAPTER_SET_PROPERTY);
hm.adapter_index = pa->adapter->index;
hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE;
hm.u.ax.property_set.parameter1 = 0;
hm.u.ax.property_set.parameter2 = 0;
hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
HPI_ADAPTER_DELETE);
hm.adapter_index = pa->adapter->index;
@@ -442,6 +545,9 @@ void asihpi_adapter_remove(struct pci_dev *pci_dev)
iounmap(pci.ap_mem_base[idx]);
}
if (pa->irq)
free_irq(pa->irq, pa);
if (pa->p_buffer)
vfree(pa->p_buffer);