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Commit 67436f23 authored by Bhalchandra Gajare's avatar Bhalchandra Gajare Committed by Gerrit - the friendly Code Review server
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ASoC: wcd934x-dsp-cntl: add ramdump support 



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: default avatarBhalchandra Gajare <gajare@codeaurora.org>
parent 4e3222f3

sound/soc/codecs/wcd934x/wcd934x-dsp-cntl.c

+22 −0
Original line number Diff line number Diff line
@@ -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;

}

sound/soc/codecs/wcd934x/wcd934x-dsp-cntl.h

+1 −0
Original line number Diff line number Diff line
@@ -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;