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ASoC: wcd934x-dsp-cntl: add ramdump support

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Add support to collect the codec memory dumps when any fatal
interrupt is raised from the DSP indicating the DSP is either
unresponsive/crashed. The memory dumps are only collected if
the debugfs node 'ramdump_enable' is set to true since ramdump
collection is debug only support.

Change-Id: I805ec63d125770b869cac892db8cf56f45510d6d
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>
This commit is contained in:
Bhalchandra Gajare 2016-09-21 14:45:07 -07:00 • committed by Gerrit - the friendly Code Review server
parent 4e3222f33a
commit 67436f2353
2 changed files with 23 additions and 0 deletions
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22
sound/soc/codecs/wcd934x/wcd934x-dsp-cntl.c
View file

@ -28,6 +28,8 @@
#define WCD_MEM_ENABLE_MAX_RETRIES 20
#define WCD_DSP_BOOT_TIMEOUT_MS 3000
#define WCD_SYSFS_ENTRY_MAX_LEN 8
#define WCD_934X_RAMDUMP_START_ADDR 0x20100000
#define WCD_934X_RAMDUMP_SIZE ((1024 * 1024) - 128)
#define WCD_CNTL_MUTEX_LOCK(codec, lock) \
{ \
@ -569,8 +571,10 @@ static irqreturn_t wcd_cntl_err_irq(int irq, void *data)
{
struct wcd_dsp_cntl *cntl = data;
struct snd_soc_codec *codec = cntl->codec;
struct wdsp_err_intr_arg arg;
u16 status = 0;
u8 reg_val;
int ret = 0;
reg_val = snd_soc_read(codec, WCD934X_CPE_SS_SS_ERROR_INT_STATUS_0A);
status = status | reg_val;
@ -581,6 +585,22 @@ static irqreturn_t wcd_cntl_err_irq(int irq, void *data)
dev_info(codec->dev, "%s: error interrupt status = 0x%x\n",
__func__, status);
if ((status & cntl->irqs.fatal_irqs) &&
(cntl->m_dev && cntl->m_ops && cntl->m_ops->intr_handler)) {
arg.mem_dumps_enabled = cntl->ramdump_enable;
arg.remote_start_addr = WCD_934X_RAMDUMP_START_ADDR;
arg.dump_size = WCD_934X_RAMDUMP_SIZE;
ret = cntl->m_ops->intr_handler(cntl->m_dev, WDSP_ERR_INTR,
&arg);
if (IS_ERR_VALUE(ret))
dev_err(cntl->codec->dev,
"%s: Failed to handle fatal irq 0x%x\n",
__func__, status & cntl->irqs.fatal_irqs);
} else {
dev_err(cntl->codec->dev, "%s: Invalid intr_handler\n",
__func__);
}
return IRQ_HANDLED;
}
@ -698,6 +718,8 @@ static void wcd_cntl_debugfs_init(char *dir, struct wcd_dsp_cntl *cntl)
debugfs_create_u32("debug_mode", S_IRUGO | S_IWUSR,
cntl->entry, &cntl->debug_mode);
debugfs_create_bool("ramdump_enable", S_IRUGO | S_IWUSR,
cntl->entry, &cntl->ramdump_enable);
done:
return;
}

1
sound/soc/codecs/wcd934x/wcd934x-dsp-cntl.h
View file

@ -77,6 +77,7 @@ struct wcd_dsp_cntl {
/* Debugfs related */
struct dentry *entry;
u32 debug_mode;
bool ramdump_enable;
/* WDSP manager drivers data */
struct device *m_dev;