[PATCH v4 11/11] drm/xe/vrsr: Introduce a debugfs node named vrsr_capable

[Badal Nilawar <badal.nilawar@intel.com>]

Add a debugfs node named vrsr_capable to check if the device
supports VRSR.

Signed-off-by: Badal Nilawar <badal.nilawar@intel.com>
---
 drivers/gpu/drm/xe/xe_debugfs.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_debugfs.c b/drivers/gpu/drm/xe/xe_debugfs.c
index d83cd6ed3fa8..d969a8f6d430 100644
--- a/drivers/gpu/drm/xe/xe_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_debugfs.c
@@ -226,6 +226,23 @@ static const struct file_operations atomic_svm_timeslice_ms_fops = {
 	.write = atomic_svm_timeslice_ms_set,
 };
 
+static ssize_t vrsr_capable_show(struct file *f, char __user *ubuf,
+				 size_t size, loff_t *pos)
+{
+	struct xe_device *xe = file_inode(f)->i_private;
+	char buf[32];
+	int len = 0;
+
+	len = scnprintf(buf, sizeof(buf), "%s\n", xe->d3cold.vrsr_capable ? "true" : "false");
+
+	return simple_read_from_buffer(ubuf, size, pos, buf, len);
+}
+
+static const struct file_operations vrsr_capable_fops = {
+	.owner = THIS_MODULE,
+	.read = vrsr_capable_show,
+};
+
 void xe_debugfs_register(struct xe_device *xe)
 {
 	struct ttm_device *bdev = &xe->ttm;
@@ -249,6 +266,9 @@ void xe_debugfs_register(struct xe_device *xe)
 	debugfs_create_file("atomic_svm_timeslice_ms", 0600, root, xe,
 			    &atomic_svm_timeslice_ms_fops);
 
+	debugfs_create_file("vrsr_capable", 0400, root, xe,
+			    &vrsr_capable_fops);
+
 	for (mem_type = XE_PL_VRAM0; mem_type <= XE_PL_VRAM1; ++mem_type) {
 		man = ttm_manager_type(bdev, mem_type);
 
-- 
2.34.1