drm/tegra: fb: Add error codes to error messages

This helps in determining what errors happened at specifics points in
the initialization sequence.

Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c
index a64f23a..e9c715d 100644 (file)
--- a/drivers/gpu/drm/tegra/fb.c
+++ b/drivers/gpu/drm/tegra/fb.c
@@ -233,8 +233,9 @@ static int tegra_fbdev_probe(struct drm_fb_helper *helper,
 
        fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
        if (IS_ERR(fbdev->fb)) {
-               dev_err(drm->dev, "failed to allocate DRM framebuffer\n");
                err = PTR_ERR(fbdev->fb);
+               dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
+                       err);
                drm_gem_object_unreference_unlocked(&bo->gem);
                goto release;
        }
@@ -319,19 +320,21 @@ static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
 
        err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
        if (err < 0) {
-               dev_err(drm->dev, "failed to initialize DRM FB helper\n");
+               dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
+                       err);
                return err;
        }
 
        err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
        if (err < 0) {
-               dev_err(drm->dev, "failed to add connectors\n");
+               dev_err(drm->dev, "failed to add connectors: %d\n", err);
                goto fini;
        }
 
        err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
        if (err < 0) {
-               dev_err(drm->dev, "failed to set initial configuration\n");
+               dev_err(drm->dev, "failed to set initial configuration: %d\n",
+                       err);
                goto fini;
        }