Add support for the drm_panic module, which displays a user-friendly
message to the screen when a kernel panic occurs.

Signed-off-by: Jocelyn Falempe <jfale...@redhat.com>
---
 drivers/gpu/drm/tiny/simpledrm.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c
index 34bbbd7b53dd..41eea078294b 100644
--- a/drivers/gpu/drm/tiny/simpledrm.c
+++ b/drivers/gpu/drm/tiny/simpledrm.c
@@ -25,6 +25,7 @@
 #include <drm/drm_gem_shmem_helper.h>
 #include <drm/drm_managed.h>
 #include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_panic.h>
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_probe_helper.h>
 
@@ -986,6 +987,19 @@ static struct simpledrm_device 
*simpledrm_device_create(struct drm_driver *drv,
        return sdev;
 }
 
+static int simpledrm_get_scanout_buffer(struct drm_device *dev,
+                                       struct drm_scanout_buffer *sb)
+{
+       struct simpledrm_device *sdev = simpledrm_device_of_dev(dev);
+
+       sb->width = sdev->mode.hdisplay;
+       sb->height = sdev->mode.vdisplay;
+       sb->pitch = sdev->pitch;
+       sb->format = sdev->format;
+       sb->map = sdev->screen_base;
+       return 0;
+}
+
 /*
  * DRM driver
  */
@@ -1001,6 +1015,7 @@ static struct drm_driver simpledrm_driver = {
        .minor                  = DRIVER_MINOR,
        .driver_features        = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
        .fops                   = &simpledrm_fops,
+       .get_scanout_buffer     = simpledrm_get_scanout_buffer,
 };
 
 /*
-- 
2.42.0

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