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
diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
index 2305e78..0153000 100644
--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -25,7 +25,9 @@
#include <drm/drm_auth.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_atomic.h>
+#include <drm/drm_print.h>
+#include "drm_internal.h"
#include "drm_crtc_internal.h"
/**
@@ -967,3 +969,60 @@ int drm_framebuffer_plane_height(int height,
return fb_plane_height(height, fb->format, plane);
}
EXPORT_SYMBOL(drm_framebuffer_plane_height);
+
+void drm_framebuffer_print_info(struct drm_printer *p, unsigned int indent,
+ const struct drm_framebuffer *fb)
+{
+ struct drm_format_name_buf format_name;
+ unsigned int i;
+
+ drm_printf_indent(p, indent, "refcount=%u\n",
+ drm_framebuffer_read_refcount(fb));
+ drm_printf_indent(p, indent, "format=%s\n",
+ drm_get_format_name(fb->format->format, &format_name));
+ drm_printf_indent(p, indent, "modifier=0x%llx\n", fb->modifier);
+ drm_printf_indent(p, indent, "size=%ux%u\n", fb->width, fb->height);
+ drm_printf_indent(p, indent, "layers:\n");
+
+ for (i = 0; i < fb->format->num_planes; i++) {
+ drm_printf_indent(p, indent + 1, "size[%u]=%dx%d\n", i,
+ drm_framebuffer_plane_width(fb->width, fb, i),
+ drm_framebuffer_plane_height(fb->height, fb, i));
+ drm_printf_indent(p, indent + 1, "pitch[%u]=%u\n", i, fb->pitches[i]);
+ drm_printf_indent(p, indent + 1, "offset[%u]=%u\n", i, fb->offsets[i]);
+ drm_printf_indent(p, indent + 1, "obj[%u]:%s\n", i,
+ fb->obj[i] ? "" : "(null)");
+ if (fb->obj[i])
+ drm_gem_print_info(p, indent + 2, fb->obj[i]);
+ }
+}
+
+#ifdef CONFIG_DEBUG_FS
+static int drm_framebuffer_info(struct seq_file *m, void *data)
+{
+ struct drm_info_node *node = m->private;
+ struct drm_device *dev = node->minor->dev;
+ struct drm_printer p = drm_seq_file_printer(m);
+ struct drm_framebuffer *fb;
+
+ mutex_lock(&dev->mode_config.fb_lock);
+ drm_for_each_fb(fb, dev) {
+ drm_printf(&p, "framebuffer[%u]:\n", fb->base.id);
+ drm_framebuffer_print_info(&p, 1, fb);
+ }
+ mutex_unlock(&dev->mode_config.fb_lock);
+
+ return 0;
+}
+
+static const struct drm_info_list drm_framebuffer_debugfs_list[] = {
+ { "framebuffer", drm_framebuffer_info, 0 },
+};
+
+int drm_framebuffer_debugfs_init(struct drm_minor *minor)
+{
+ return drm_debugfs_create_files(drm_framebuffer_debugfs_list,
+ ARRAY_SIZE(drm_framebuffer_debugfs_list),
+ minor->debugfs_root, minor);
+}
+#endif