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drm/ast: Add drm_panic support

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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: Jocelyn Falempe <jfalempe@redhat.com>
Acked-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Tested-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-10-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jocelyn Falempe 2024-04-09 18:30:48 +02:00
parent 99b6251945
commit baaf150fa9
1 changed files with 18 additions and 0 deletions
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18
drivers/gpu/drm/ast/ast_mode.c
View File

@ -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 = {