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drm/mgag200: 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.

v5:
 * Also check that the plane is visible and primary. (Thomas Zimmermann)

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 (Thomas Zimmermann)

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>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-8-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jocelyn Falempe 2024-04-09 18:30:46 +02:00
parent 41e54853ca
commit 7e64f7c83c
2 changed files with 24 additions and 1 deletions
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7
drivers/gpu/drm/mgag200/mgag200_drv.h
View File

@ -366,6 +366,7 @@ struct drm_crtc_state;
struct drm_display_mode;
struct drm_plane;
struct drm_atomic_state;
struct drm_scanout_buffer;
extern const uint32_t mgag200_primary_plane_formats[];
extern const size_t mgag200_primary_plane_formats_size;
@ -379,12 +380,16 @@ void mgag200_primary_plane_helper_atomic_enable(struct drm_plane *plane,
struct drm_atomic_state *state);
void mgag200_primary_plane_helper_atomic_disable(struct drm_plane *plane,
struct drm_atomic_state *old_state);
int mgag200_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane,
struct drm_scanout_buffer *sb);
#define MGAG200_PRIMARY_PLANE_HELPER_FUNCS \
DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, \
.atomic_check = mgag200_primary_plane_helper_atomic_check, \
.atomic_update = mgag200_primary_plane_helper_atomic_update, \
.atomic_enable = mgag200_primary_plane_helper_atomic_enable, \
.atomic_disable = mgag200_primary_plane_helper_atomic_disable
.atomic_disable = mgag200_primary_plane_helper_atomic_disable, \
.get_scanout_buffer = mgag200_primary_plane_helper_get_scanout_buffer
#define MGAG200_PRIMARY_PLANE_FUNCS \
.update_plane = drm_atomic_helper_update_plane, \

18
drivers/gpu/drm/mgag200/mgag200_mode.c
View File

@ -21,6 +21,7 @@
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_panic.h>
#include <drm/drm_print.h>
#include "mgag200_drv.h"
@ -546,6 +547,23 @@ void mgag200_primary_plane_helper_atomic_disable(struct drm_plane *plane,
msleep(20);
}
int mgag200_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane,
struct drm_scanout_buffer *sb)
{
struct mga_device *mdev = to_mga_device(plane->dev);
struct iosys_map map = IOSYS_MAP_INIT_VADDR_IOMEM(mdev->vram);
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;
}
/*
* CRTC
*/