drm/i915/params: support bool values for int and uint params

It's not uncommon for us to switch param types between bools and ints,
often having otherwise bool semantics but -1 value for platform
default. Allow bool values (such as YyNn) for ints.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/c945ac7b08e0eb0827cf647609885f4abdb84f1d.1575560168.git.jani.nikula@intel.com

drivers/gpu/drm/i915/i915_debugfs_params.c

@@ -32,6 +32,14 @@ static ssize_t i915_param_int_write(struct file *file,
 	int ret;
 
 	ret = kstrtoint_from_user(ubuf, len, 0, value);
+	if (ret) {
+		/* support boolean values too */
+		bool b;
+
+		ret = kstrtobool_from_user(ubuf, len, &b);
+		if (!ret)
+			*value = b;
+	}
 
 	return ret ?: len;
 }
@@ -77,6 +85,14 @@ static ssize_t i915_param_uint_write(struct file *file,
 	int ret;
 
 	ret = kstrtouint_from_user(ubuf, len, 0, value);
+	if (ret) {
+		/* support boolean values too */
+		bool b;
+
+		ret = kstrtobool_from_user(ubuf, len, &b);
+		if (!ret)
+			*value = b;
+	}
 
 	return ret ?: len;
 }