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Commit 28ced727 authored by Jilai Wang's avatar Jilai Wang
Browse files

msm: npu: Add a sysfs node to load/unload fw 



This change is to add a sysfs node to allow user to load/unload
firmware by accessing it.

Change-Id: I5115534aec9fcd15e9657dc691a6a493149390d7
Signed-off-by: default avatarJilai Wang <jilaiw@codeaurora.org>
parent 9217418c

drivers/media/platform/msm/npu/npu_dev.c

+49 −0
Original line number Diff line number Diff line
@@ -68,6 +68,12 @@ static ssize_t npu_show_perf_mode_override(struct device *dev, 
static ssize_t npu_store_perf_mode_override(struct device *dev,

					  struct device_attribute *attr,

					  const char *buf, size_t count);

static ssize_t npu_show_fw_state(struct device *dev,

					 struct device_attribute *attr,

					 char *buf);

static ssize_t npu_store_fw_state(struct device *dev,

					  struct device_attribute *attr,

					  const char *buf, size_t count);

static void npu_suspend_devbw(struct npu_device *npu_dev);

static void npu_resume_devbw(struct npu_device *npu_dev);

static bool npu_is_post_clock(const char *clk_name);
@@ -166,11 +172,13 @@ static DEVICE_ATTR(caps, 0444, npu_show_capabilities, NULL); 
static DEVICE_ATTR(pwr, 0644, npu_show_pwr_state, npu_store_pwr_state);

static DEVICE_ATTR(perf_mode_override, 0644,

	npu_show_perf_mode_override, npu_store_perf_mode_override);

static DEVICE_ATTR(fw_state, 0644, npu_show_fw_state, npu_store_fw_state);



static struct attribute *npu_fs_attrs[] = {

	&dev_attr_caps.attr,

	&dev_attr_pwr.attr,

	&dev_attr_perf_mode_override.attr,

	&dev_attr_fw_state.attr,

	NULL

};
@@ -307,6 +315,47 @@ static ssize_t npu_store_perf_mode_override(struct device *dev, 
	return count;

}



/* -------------------------------------------------------------------------

 * SysFS - firmware state

 * -------------------------------------------------------------------------

 */

static ssize_t npu_show_fw_state(struct device *dev,

					 struct device_attribute *attr,

					 char *buf)

{

	struct npu_device *npu_dev = dev_get_drvdata(dev);



	return scnprintf(buf, PAGE_SIZE, "%s\n",

			(npu_dev->host_ctx.fw_state == FW_ENABLED) ?

			"on" : "off");

}



static ssize_t npu_store_fw_state(struct device *dev,

					  struct device_attribute *attr,

					  const char *buf, size_t count)

{

	struct npu_device *npu_dev = dev_get_drvdata(dev);

	bool enable = false;

	int rc;



	if (strtobool(buf, &enable) < 0)

		return -EINVAL;



	if (enable) {

		pr_debug("%s: fw init\n", __func__);

		rc = fw_init(npu_dev);

		if (rc) {

			pr_err("fw init failed\n");

			return rc;

		}

	} else {

		pr_debug("%s: fw deinit\n", __func__);

		fw_deinit(npu_dev, false, true);

	}



	return count;

}



/* -------------------------------------------------------------------------

 * Power Related

 * -------------------------------------------------------------------------