[PATCH drm-next] drm/bochs: Add support for drm_panic

[Jocelyn Falempe]

On 13/06/2025 15:20, Ryosuke Yasuoka wrote:
> Add drm_panic moudle for bochs drm so that panic screen can be displayed
> on panic.

I just pushed it to drm-misc-next, with the typo in the commit message 
fixed.

Thanks,

-- 

Jocelyn

> 
> Signed-off-by: Ryosuke Yasuoka <ryasuoka at redhat.com>
> ---
>   drivers/gpu/drm/tiny/bochs.c | 19 +++++++++++++++++++
>   1 file changed, 19 insertions(+)
> 
> diff --git a/drivers/gpu/drm/tiny/bochs.c b/drivers/gpu/drm/tiny/bochs.c
> index 8706763af8fb..ed42ad5c4927 100644
> --- a/drivers/gpu/drm/tiny/bochs.c
> +++ b/drivers/gpu/drm/tiny/bochs.c
> @@ -19,6 +19,7 @@
>   #include <drm/drm_gem_shmem_helper.h>
>   #include <drm/drm_managed.h>
>   #include <drm/drm_module.h>
> +#include <drm/drm_panic.h>
>   #include <drm/drm_plane_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);
>   }
>   
> +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 = {
>   	DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
>   	.atomic_check = bochs_primary_plane_helper_atomic_check,
>   	.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 = {
> 
> base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494