[PATCH v3 7/8] drm/cma-helper: Add drm_gem_cma_print_info()

[Noralf Trønnes]

Add drm_gem_cma_print_info() for debugfs printing
struct drm_gem_cma_object specific info.

Signed-off-by: Noralf Trønnes <noralf at tronnes.org>
---
 drivers/gpu/drm/drm_gem_cma_helper.c | 19 +++++++++++++++++++
 include/drm/drm_gem_cma_helper.h     |  5 ++++-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c
index 020e7668dfab..89dc7f04fae6 100644
--- a/drivers/gpu/drm/drm_gem_cma_helper.c
+++ b/drivers/gpu/drm/drm_gem_cma_helper.c
@@ -423,6 +423,25 @@ void drm_gem_cma_describe(struct drm_gem_cma_object *cma_obj,
 EXPORT_SYMBOL_GPL(drm_gem_cma_describe);
 #endif
 
+/**
+ * drm_gem_cma_print_info() - Print &drm_gem_cma_object info for debugfs
+ * @p: DRM printer
+ * @indent: Tab indentation level
+ * @gem: GEM object
+ *
+ * This function can be used as the &drm_driver->gem_print_info callback.
+ * It prints paddr and vaddr for use in e.g. debugfs output.
+ */
+void drm_gem_cma_print_info(struct drm_printer *p, unsigned int indent,
+			    const struct drm_gem_object *obj)
+{
+	struct drm_gem_cma_object *cma_obj = to_drm_gem_cma_obj(obj);
+
+	drm_printf_indent(p, indent, "paddr=%pad\n", &cma_obj->paddr);
+	drm_printf_indent(p, indent, "vaddr=%p\n", cma_obj->vaddr);
+}
+EXPORT_SYMBOL(drm_gem_cma_print_info);
+
 /**
  * drm_gem_cma_prime_get_sg_table - provide a scatter/gather table of pinned
  *     pages for a CMA GEM object
diff --git a/include/drm/drm_gem_cma_helper.h b/include/drm/drm_gem_cma_helper.h
index 58a739bf15f1..bc47e6eba271 100644
--- a/include/drm/drm_gem_cma_helper.h
+++ b/include/drm/drm_gem_cma_helper.h
@@ -21,7 +21,7 @@ struct drm_gem_cma_object {
 };
 
 static inline struct drm_gem_cma_object *
-to_drm_gem_cma_obj(struct drm_gem_object *gem_obj)
+to_drm_gem_cma_obj(const struct drm_gem_object *gem_obj)
 {
 	return container_of(gem_obj, struct drm_gem_cma_object, base);
 }
@@ -94,6 +94,9 @@ unsigned long drm_gem_cma_get_unmapped_area(struct file *filp,
 void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
 #endif
 
+void drm_gem_cma_print_info(struct drm_printer *p, unsigned int indent,
+			    const struct drm_gem_object *obj);
+
 struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
 struct drm_gem_object *
 drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
-- 
2.14.2