mali_kbase: platform: dvfs: Add level lock for PowerHAL

Adds a new level lock class intended for use by PowerHAL
called `GPU_DVFS_LEVEL_LOCK_HINT`.

Bug: 188034128
Signed-off-by: Sidath Senanayake <sidaths@google.com>
Change-Id: I7eccdf1a838aad1e27e632043f8fe44b0411f897

1 files changed, 93 insertions, 0 deletions

diff --git a/mali_kbase/platform/pixel/pixel_gpu_sysfs.c b/mali_kbase/platform/pixel/pixel_gpu_sysfs.c
index c14d27a..9a32b7e 100644
--- a/mali_kbase/platform/pixel/pixel_gpu_sysfs.c
+++ b/mali_kbase/platform/pixel/pixel_gpu_sysfs.c
@@ -16,6 +16,7 @@
 static const char *gpu_dvfs_level_lock_names[GPU_DVFS_LEVEL_LOCK_COUNT] = {
 	"devicetree",
 	"compute",
+	"hint",
 	"sysfs",
 #ifdef CONFIG_MALI_PIXEL_GPU_THERMAL
 	"thermal",
@@ -393,6 +394,94 @@ static ssize_t scaling_min_compute_freq_show(struct device *dev,
 		pc->dvfs.table[pc->dvfs.level_scaling_compute_min].clk[GPU_DVFS_CLK_SHADERS]);
 }
 
+static ssize_t hint_max_freq_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct kbase_device *kbdev = dev->driver_data;
+	struct pixel_context *pc = kbdev->platform_context;
+	int sysfs_lock_level;
+
+	if (!pc)
+		return -ENODEV;
+
+	sysfs_lock_level = pc->dvfs.level_locks[GPU_DVFS_LEVEL_LOCK_HINT].level_max;
+	if (sysfs_lock_level < 0)
+		sysfs_lock_level = pc->dvfs.level_max;
+
+	return scnprintf(buf, PAGE_SIZE, "%d\n",
+		pc->dvfs.table[sysfs_lock_level].clk[GPU_DVFS_CLK_SHADERS]);
+}
+
+static ssize_t hint_max_freq_store(struct device *dev, struct device_attribute *attr,
+	const char *buf, size_t count)
+{
+	int level, ret;
+	unsigned int clock;
+	struct kbase_device *kbdev = dev->driver_data;
+	struct pixel_context *pc = kbdev->platform_context;
+
+	if (!pc)
+		return -ENODEV;
+
+	ret = kstrtoint(buf, 0, &clock);
+	if (ret)
+		return -EINVAL;
+
+	level = get_level_from_clock(kbdev, clock);
+	if (level < 0)
+		return -EINVAL;
+
+	mutex_lock(&pc->dvfs.lock);
+	gpu_dvfs_update_level_lock(kbdev, GPU_DVFS_LEVEL_LOCK_HINT, -1, level);
+	gpu_dvfs_select_level(kbdev);
+	mutex_unlock(&pc->dvfs.lock);
+
+	return count;
+}
+
+static ssize_t hint_min_freq_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct kbase_device *kbdev = dev->driver_data;
+	struct pixel_context *pc = kbdev->platform_context;
+	int sysfs_lock_level;
+
+	if (!pc)
+		return -ENODEV;
+
+	sysfs_lock_level = pc->dvfs.level_locks[GPU_DVFS_LEVEL_LOCK_HINT].level_min;
+	if (sysfs_lock_level < 0)
+		sysfs_lock_level = pc->dvfs.level_min;
+
+	return scnprintf(buf, PAGE_SIZE, "%d\n",
+		pc->dvfs.table[sysfs_lock_level].clk[GPU_DVFS_CLK_SHADERS]);
+}
+
+static ssize_t hint_min_freq_store(struct device *dev, struct device_attribute *attr,
+	const char *buf, size_t count)
+{
+	int ret, level;
+	unsigned int clock;
+	struct kbase_device *kbdev = dev->driver_data;
+	struct pixel_context *pc = kbdev->platform_context;
+
+	if (!pc)
+		return -ENODEV;
+
+	ret = kstrtoint(buf, 0, &clock);
+	if (ret)
+		return -EINVAL;
+
+	level = get_level_from_clock(kbdev, clock);
+	if (level < 0)
+		return -EINVAL;
+
+	mutex_lock(&pc->dvfs.lock);
+	gpu_dvfs_update_level_lock(kbdev, GPU_DVFS_LEVEL_LOCK_HINT, level, -1);
+	gpu_dvfs_select_level(kbdev);
+	mutex_unlock(&pc->dvfs.lock);
+
+	return count;
+}
+
 static ssize_t scaling_max_freq_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct kbase_device *kbdev = dev->driver_data;
@@ -591,6 +680,8 @@ DEVICE_ATTR_RO(cur_freq);
 DEVICE_ATTR_RO(max_freq);
 DEVICE_ATTR_RO(min_freq);
 DEVICE_ATTR_RO(scaling_min_compute_freq);
+DEVICE_ATTR_RW(hint_max_freq);
+DEVICE_ATTR_RW(hint_min_freq);
 DEVICE_ATTR_RW(scaling_max_freq);
 DEVICE_ATTR_RW(scaling_min_freq);
 DEVICE_ATTR_RO(time_in_state);
@@ -621,6 +712,8 @@ static struct {
 	{ "max_freq", &dev_attr_max_freq },
 	{ "min_freq", &dev_attr_min_freq },
 	{ "min_compute_freq", &dev_attr_scaling_min_compute_freq },
+	{ "hint_max_freq", &dev_attr_hint_max_freq },
+	{ "hint_min_freq", &dev_attr_hint_min_freq },
 	{ "scaling_max_freq", &dev_attr_scaling_max_freq },
 	{ "scaling_min_freq", &dev_attr_scaling_min_freq },
 	{ "time_in_state", &dev_attr_time_in_state },