[PATCH v8 8/8] drm/ast: Add drm_panic support
Jocelyn Falempe
jfalempe at redhat.com
Tue Feb 27 10:04:19 UTC 2024
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)
Signed-off-by: Jocelyn Falempe <jfalempe at redhat.com>
---
drivers/gpu/drm/ast/ast_mode.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index a718646a66b8..3d6d4c71bc34 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -43,6 +43,7 @@
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_managed.h>
+#include <drm/drm_panic.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
@@ -656,9 +657,13 @@ static void ast_primary_plane_helper_atomic_update(struct drm_plane *plane,
struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
struct ast_crtc_state *ast_crtc_state = to_ast_crtc_state(crtc_state);
struct ast_vbios_mode_info *vbios_mode_info = &ast_crtc_state->vbios_mode_info;
+ struct iosys_map map;
ast_set_color_reg(ast, fb->format);
ast_set_vbios_color_reg(ast, fb->format, vbios_mode_info);
+
+ iosys_map_set_vaddr_iomem(&map, ast_plane->vaddr);
+ drm_panic_set_buffer(plane->panic_scanout, fb, &map);
}
drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
@@ -736,6 +741,7 @@ static int ast_primary_plane_init(struct ast_device *ast)
}
drm_plane_helper_add(primary_plane, &ast_primary_plane_helper_funcs);
drm_plane_enable_fb_damage_clips(primary_plane);
+ drm_panic_register(primary_plane);
return 0;
}
--
2.43.0
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