This enables panic message output for fb cma helper framebuffers.
Signed-off-by: Noralf Trønnes <noralf at tronnes.org>
---
drivers/gpu/drm/drm_fb_cma_helper.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c
b/drivers/gpu/drm/drm_fb_cma_helper.c
index 1fd6eac..2f1b012 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -126,9 +126,19 @@ int drm_fb_cma_create_handle(struct drm_framebuffer *fb,
}
EXPORT_SYMBOL(drm_fb_cma_create_handle);
+static void *drm_fb_cma_panic_vmap(struct drm_framebuffer *fb)
+{
+ struct drm_fb_cma *fb_cma = to_fb_cma(fb);
+ struct drm_gem_cma_object *cma_obj = fb_cma->obj[0];
+
+ /* A PRIME imported buffer will not have it's vaddr set. */
+ return cma_obj ? cma_obj->vaddr : NULL;
+}
+
static struct drm_framebuffer_funcs drm_fb_cma_funcs = {
.destroy = drm_fb_cma_destroy,
.create_handle = drm_fb_cma_create_handle,
+ .panic_vmap = drm_fb_cma_panic_vmap,
};
static struct drm_fb_cma *drm_fb_cma_alloc(struct drm_device *dev,
--
2.8.2
