Add support for the drm_panic module, which displays a user-friendly
message to the screen when a kernel panic occurs.
v8:
* Replace get_scanout_buffer() with drm_panic_set_buffer()
(Thomas Zimmermann)
v9:
* Revert to using get_scanout_buffer() (Sima)
* move get_scanout_buffer() to plane helper functions (Thomas Zimmermann)
v12:
* Use array for map and pitch in struct drm_scanout_buffer
to support multi-planar format later. (Thomas Zimmermann)
Signed-off-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx>
Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/gpu/drm/tiny/simpledrm.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c
index 7ce1c4617675..1d8fa07572c5 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_probe_helper.h>
#define DRIVER_NAME "simpledrm"
@@ -671,11 +672,26 @@ static void simpledrm_primary_plane_helper_atomic_disable(struct drm_plane *plan
drm_dev_exit(idx);
}
+static int simpledrm_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane,
+ struct drm_scanout_buffer *sb)
+{
+ struct simpledrm_device *sdev = simpledrm_device_of_dev(plane->dev);
+
+ sb->width = sdev->mode.hdisplay;
+ sb->height = sdev->mode.vdisplay;
+ sb->format = sdev->format;
+ sb->pitch[0] = sdev->pitch;
+ sb->map[0] = sdev->screen_base;
+
+ return 0;
+}
+
static const struct drm_plane_helper_funcs simpledrm_primary_plane_helper_funcs = {
DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
.atomic_check = simpledrm_primary_plane_helper_atomic_check,
.atomic_update = simpledrm_primary_plane_helper_atomic_update,
.atomic_disable = simpledrm_primary_plane_helper_atomic_disable,
+ .get_scanout_buffer = simpledrm_primary_plane_helper_get_scanout_buffer,
};
static const struct drm_plane_funcs simpledrm_primary_plane_funcs = {
--
2.44.0
