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drm/bochs: Add support for drm_panic

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Add drm_panic module for bochs drm so that panic screen can be displayed
on panic.

Signed-off-by: Ryosuke Yasuoka <ryasuoka@redhat.com>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://lore.kernel.org/r/20250613132023.106946-1-ryasuoka@redhat.com
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
This commit is contained in:
Ryosuke Yasuoka 2025-06-13 22:20:14 +09:00 committed by Jocelyn Falempe
parent 3828a643e8
commit a629feabb5
1 changed files with 19 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

19
drivers/gpu/drm/tiny/bochs.c
View file

@ -19,6 +19,7 @@
#include <drm/drm_gem_shmem_helper.h> #include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_managed.h> #include <drm/drm_managed.h>
#include <drm/drm_module.h> #include <drm/drm_module.h>
#include <drm/drm_panic.h>
#include <drm/drm_plane_helper.h> #include <drm/drm_plane_helper.h>
#include <drm/drm_probe_helper.h> #include <drm/drm_probe_helper.h>
@ -469,10 +470,28 @@ static void bochs_primary_plane_helper_atomic_update(struct drm_plane *plane,
bochs_hw_setformat(bochs, fb->format); bochs_hw_setformat(bochs, fb->format);
} }
static int bochs_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane,
struct drm_scanout_buffer *sb)
{
struct bochs_device *bochs = to_bochs_device(plane->dev);
struct iosys_map map = IOSYS_MAP_INIT_VADDR_IOMEM(bochs->fb_map);
if (plane->state && plane->state->fb) {
sb->format = plane->state->fb->format;
sb->width = plane->state->fb->width;
sb->height = plane->state->fb->height;
sb->pitch[0] = plane->state->fb->pitches[0];
sb->map[0] = map;
return 0;
}
return -ENODEV;
}
static const struct drm_plane_helper_funcs bochs_primary_plane_helper_funcs = { static const struct drm_plane_helper_funcs bochs_primary_plane_helper_funcs = {
DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
.atomic_check = bochs_primary_plane_helper_atomic_check, .atomic_check = bochs_primary_plane_helper_atomic_check,
.atomic_update = bochs_primary_plane_helper_atomic_update, .atomic_update = bochs_primary_plane_helper_atomic_update,
.get_scanout_buffer = bochs_primary_plane_helper_get_scanout_buffer,
}; };
static const struct drm_plane_funcs bochs_primary_plane_funcs = { static const struct drm_plane_funcs bochs_primary_plane_funcs = {