Commit baaf150f authored by Jocelyn Falempe's avatar Jocelyn Falempe
Browse files

drm/ast: Add drm_panic support 



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

v12:
 * Use array for map and pitch in struct drm_scanout_buffer
   to support multi-planar format later. (Thomas Zimmermann)

Signed-off-by: default avatarJocelyn Falempe <jfalempe@redhat.com>
Acked-by: default avatarSui Jingfeng <sui.jingfeng@linux.dev>
Tested-by: default avatarSui Jingfeng <sui.jingfeng@linux.dev>
Reviewed-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-10-jfalempe@redhat.com


Acked-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 99b62519

drivers/gpu/drm/ast/ast_mode.c

+18 −0
Original line number Diff line number Diff line
@@ -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>
@@ -701,12 +702,29 @@ 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[0] = plane->state->fb->pitches[0];

		iosys_map_set_vaddr_iomem(&sb->map[0], 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 = {