Add support for the drm_panic module, which displays a message to
the screen when a kernel panic occurs.
v7
* Use drm_for_each_primary_visible_plane()
v8:
* Replace get_scanout_buffer() logic with drm_panic_set_buffer()
(Thomas Zimmermann)
v9:
* Revert to using get_scanout_buffer() (Sima)
* move get_scanout_buffer() to plane helper functions
Signed-off-by: Jocelyn Falempe
---
drivers/gpu/drm/ast/ast_mode.c | 18 ++
1 file changed, 18 insertions(+)
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index a718646a66b8..49f2d8bd3377 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -43,6 +43,7 @@
#include
#include
#include
+#include
#include
#include
@@ -700,12 +701,29 @@ static void
ast_primary_plane_helper_atomic_disable(struct drm_plane *plane,
ast_set_index_reg_mask(ast, AST_IO_VGASRI, 0x1, 0xdf, 0x20);
}
+static int ast_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane,
+ struct
drm_scanout_buffer *sb)
+{
+ struct ast_plane *ast_plane = to_ast_plane(plane);
+
+ if (plane->state && plane->state->fb && ast_plane->vaddr) {
+ 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;
+}
+
static const struct drm_plane_helper_funcs ast_primary_plane_helper_funcs = {
DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
.atomic_check = ast_primary_plane_helper_atomic_check,
.atomic_update = ast_primary_plane_helper_atomic_update,
.atomic_enable = ast_primary_plane_helper_atomic_enable,
.atomic_disable = ast_primary_plane_helper_atomic_disable,
+ .get_scanout_buffer = ast_primary_plane_helper_get_scanout_buffer,
};
static const struct drm_plane_funcs ast_primary_plane_funcs = {
--
2.44.0
