[PATCH v4 4/4] drm/panthor: add sysfs knob for enabling job profiling

[Adrián Larumbe]

This commit introduces a DRM device sysfs attribute that lets UM control
the job accounting status in the device. The knob variable had been brought
in as part of a previous commit, but now we're able to fix it manually.

Signed-off-by: Adrián Larumbe <adrian.laru...@collabora.com>
---
 drivers/gpu/drm/panthor/panthor_drv.c | 36 +++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/drivers/gpu/drm/panthor/panthor_drv.c 
b/drivers/gpu/drm/panthor/panthor_drv.c
index 6a0c1a06a709..a2876310856f 100644
--- a/drivers/gpu/drm/panthor/panthor_drv.c
+++ b/drivers/gpu/drm/panthor/panthor_drv.c
@@ -1448,6 +1448,41 @@ static void panthor_remove(struct platform_device *pdev)
        panthor_device_unplug(ptdev);
 }
 
+static ssize_t profiling_show(struct device *dev,
+                             struct device_attribute *attr,
+                             char *buf)
+{
+       struct panthor_device *ptdev = dev_get_drvdata(dev);
+
+       return sysfs_emit(buf, "%d\n", ptdev->profile_mode);
+}
+
+static ssize_t profiling_store(struct device *dev,
+                              struct device_attribute *attr,
+                              const char *buf, size_t len)
+{
+       struct panthor_device *ptdev = dev_get_drvdata(dev);
+       bool value;
+       int err;
+
+       err = kstrtobool(buf, &value);
+       if (err)
+               return err;
+
+       ptdev->profile_mode = value;
+
+       return len;
+}
+
+static DEVICE_ATTR_RW(profiling);
+
+static struct attribute *panthor_attrs[] = {
+       &dev_attr_profiling.attr,
+       NULL,
+};
+
+ATTRIBUTE_GROUPS(panthor);
+
 static const struct of_device_id dt_match[] = {
        { .compatible = "rockchip,rk3588-mali" },
        { .compatible = "arm,mali-valhall-csf" },
@@ -1467,6 +1502,7 @@ static struct platform_driver panthor_driver = {
                .name = "panthor",
                .pm = pm_ptr(&panthor_pm_ops),
                .of_match_table = dt_match,
+               .dev_groups = panthor_groups,
        },
 };
 
-- 
2.45.1