drm/nouveau: allow retrieval of vbios image from debugfs

It's very useful to be able to access this without additional tools for
debugging purposes.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
index 89e36ee057c..ac6af471649 100644
--- a/drivers/gpu/drm/nouveau/nouveau_debugfs.c
+++ b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
@@ -144,9 +144,22 @@ nouveau_debugfs_memory_info(struct seq_file *m, void *data)
         return 0;
 }
 
+static int
+nouveau_debugfs_vbios_image(struct seq_file *m, void *data)
+{
+        struct drm_info_node *node = (struct drm_info_node *) m->private;
+        struct drm_nouveau_private *dev_priv = node->minor->dev->dev_private;
+        int i;
+
+        for (i = 0; i < dev_priv->VBIOS.length; i++)
+                seq_printf(m, "%c", dev_priv->VBIOS.data[i]);
+        return 0;
+}
+
 static struct drm_info_list nouveau_debugfs_list[] = {
         { "chipset", nouveau_debugfs_chipset_info, 0, NULL },
         { "memory", nouveau_debugfs_memory_info, 0, NULL },
+        { "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL },
 };
 #define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list)