Add support for the drm_panic module, which displays a message to
the screen when a kernel panic occurs.
Signed-off-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx>
---
drivers/gpu/drm/ast/ast_drv.c | 29 +++++++++++++++++++++++++++--
1 file changed, 27 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
index 90bcb1eb9cd9..bb49e89dbd3c 100644
--- a/drivers/gpu/drm/ast/ast_drv.c
+++ b/drivers/gpu/drm/ast/ast_drv.c
@@ -35,6 +35,7 @@
#include <drm/drm_fbdev_generic.h>
#include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_module.h>
+#include <drm/drm_panic.h>
#include <drm/drm_probe_helper.h>
#include "ast_drv.h"
@@ -48,6 +49,30 @@ module_param_named(modeset, ast_modeset, int, 0400);
* DRM driver
*/
+static int ast_get_scanout_buffer(struct drm_device *dev,
+ struct drm_scanout_buffer *sb)
+{
+ struct drm_plane *plane;
+ struct ast_plane *ast_plane;
+
+ drm_for_each_plane(plane, dev) {
+ if (!plane->state || !plane->state->visible || !plane->state->fb ||
+ plane->type != DRM_PLANE_TYPE_PRIMARY)
+ continue;
+ ast_plane = to_ast_plane(plane);
+ if (!ast_plane->vaddr)
+ continue;
+
+ sb->format = plane->state->fb->format;
+ sb->width = plane->state->fb->width;
+ sb->height = plane->state->fb->height;
+ sb->pitch = plane->state->fb->pitches[0];
+ iosys_map_set_vaddr_iomem(&sb->map, ast_plane->vaddr);
+ return 0;
+ }
+ return -ENODEV;
+}
+
DEFINE_DRM_GEM_FOPS(ast_fops);
static const struct drm_driver ast_driver = {
@@ -62,8 +87,8 @@ static const struct drm_driver ast_driver = {
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
.patchlevel = DRIVER_PATCHLEVEL,
-
- DRM_GEM_SHMEM_DRIVER_OPS
+ .get_scanout_buffer = ast_get_scanout_buffer,
+ DRM_GEM_SHMEM_DRIVER_OPS,
};
/*
--
2.42.0
