drm/framebuffer: Add framebuffer debugfs file

Add debugfs file that dumps info about the framebuffers and its planes.
Also dump info about any connected gem object(s).

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171107191348.17555-5-noralf@tronnes.org

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 4c84b23d37cc..01f8d9481211 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -40,6 +40,7 @@
 #include <drm/drmP.h>
 #include <drm/drm_vma_manager.h>
 #include <drm/drm_gem.h>
+#include <drm/drm_print.h>
 #include "drm_internal.h"
 
 /** @file drm_gem.c
@@ -1040,3 +1041,19 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
         return ret;
 }
 EXPORT_SYMBOL(drm_gem_mmap);
+
+void drm_gem_print_info(struct drm_printer *p, unsigned int indent,
+                        const struct drm_gem_object *obj)
+{
+        drm_printf_indent(p, indent, "name=%d\n", obj->name);
+        drm_printf_indent(p, indent, "refcount=%u\n",
+                          kref_read(&obj->refcount));
+        drm_printf_indent(p, indent, "start=%08lx\n",
+                          drm_vma_node_start(&obj->vma_node));
+        drm_printf_indent(p, indent, "size=%zu\n", obj->size);
+        drm_printf_indent(p, indent, "imported=%s\n",
+                          obj->import_attach ? "yes" : "no");
+
+        if (obj->dev->driver->gem_print_info)
+                obj->dev->driver->gem_print_info(p, indent, obj);
+}