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Commit bd0eb61c authored by Lucille Sylvester's avatar Lucille Sylvester Committed by Gerrit - the friendly Code Review server
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msm: kgsl: Allow run time control of bus modification 



Add a "bus_split" variable to sysfs.  When it is set to 1 the
bus calculation will run normally.  When set to 0 the default
but vote will be used for each GPU frequency.

Change-Id: I4e4e656664be06669d53fb5765a89943679004f2
Signed-off-by: default avatarLucille Sylvester <lsylvest@codeaurora.org>
parent 0740af51

drivers/gpu/msm/kgsl_pwrctrl.c

+40 −0
Original line number Diff line number Diff line
@@ -753,6 +753,42 @@ static ssize_t kgsl_pwrctrl_force_rail_on_store(struct device *dev, 
	return __force_on_store(dev, attr, buf, count, KGSL_PWRFLAGS_POWER_ON);

}



static ssize_t kgsl_pwrctrl_bus_split_show(struct device *dev,

					struct device_attribute *attr,

					char *buf)

{

	struct kgsl_device *device = kgsl_device_from_dev(dev);

	if (device == NULL)

		return 0;

	return snprintf(buf, PAGE_SIZE, "%d\n",

		device->pwrctrl.bus_control);

}



static ssize_t kgsl_pwrctrl_bus_split_store(struct device *dev,

					struct device_attribute *attr,

					const char *buf, size_t count)

{

	char temp[20];

	unsigned long val;

	struct kgsl_device *device = kgsl_device_from_dev(dev);

	int rc;



	if (device == NULL)

		return 0;



	snprintf(temp, sizeof(temp), "%.*s",

			(int)min(count, sizeof(temp) - 1), buf);

	rc = kstrtoul(temp, 0, &val);

	if (rc)

		return rc;



	mutex_lock(&device->mutex);

	device->pwrctrl.bus_control = val ? true : false;

	mutex_unlock(&device->mutex);



	return count;

}



DEVICE_ATTR(gpuclk, 0644, kgsl_pwrctrl_gpuclk_show, kgsl_pwrctrl_gpuclk_store);

DEVICE_ATTR(max_gpuclk, 0644, kgsl_pwrctrl_max_gpuclk_show,

	kgsl_pwrctrl_max_gpuclk_store);
@@ -792,6 +828,9 @@ DEVICE_ATTR(force_bus_on, 0644, 
DEVICE_ATTR(force_rail_on, 0644,

	kgsl_pwrctrl_force_rail_on_show,

	kgsl_pwrctrl_force_rail_on_store);

DEVICE_ATTR(bus_split, 0644,

	kgsl_pwrctrl_bus_split_show,

	kgsl_pwrctrl_bus_split_store);



static const struct device_attribute *pwrctrl_attr_list[] = {

	&dev_attr_gpuclk,
@@ -809,6 +848,7 @@ static const struct device_attribute *pwrctrl_attr_list[] = { 
	&dev_attr_force_clk_on,

	&dev_attr_force_bus_on,

	&dev_attr_force_rail_on,

	&dev_attr_bus_split,

	NULL

};

drivers/gpu/msm/kgsl_pwrscale.c

+1 −1
Original line number Diff line number Diff line
@@ -208,7 +208,7 @@ int kgsl_devfreq_target(struct device *dev, unsigned long *freq, u32 flags) 
				level = i;

				break;

			}

	} else if (flags) {

	} else if (flags && pwr->bus_control) {

		/*

		 * Signal for faster or slower bus.  If KGSL isn't already

		 * running at the desired speed for the given level, modify