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drm/hyperv: Add support for drm_panic 

Add drm_panic module for hyperv 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/20250526090117.80593-2-ryasuoka@redhat.com
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
pull/1279/head
Ryosuke Yasuoka 2025-05-26 18:01:05 +09:00 committed by Jocelyn Falempe
parent 0b3d994258
commit 3671f37777
1 changed files with 36 additions and 0 deletions
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36
drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
View File

@ -17,6 +17,7 @@
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_panic.h>
#include <drm/drm_plane.h>
#include "hyperv_drm.h"
@ -181,10 +182,45 @@ static void hyperv_plane_atomic_update(struct drm_plane *plane,
}
}
static int hyperv_plane_get_scanout_buffer(struct drm_plane *plane,
struct drm_scanout_buffer *sb)
{
struct hyperv_drm_device *hv = to_hv(plane->dev);
struct iosys_map map = IOSYS_MAP_INIT_VADDR_IOMEM(hv->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;
}
static void hyperv_plane_panic_flush(struct drm_plane *plane)
{
struct hyperv_drm_device *hv = to_hv(plane->dev);
struct drm_rect rect;
if (!plane->state || !plane->state->fb)
return;
rect.x1 = 0;
rect.y1 = 0;
rect.x2 = plane->state->fb->width;
rect.y2 = plane->state->fb->height;
hyperv_update_dirt(hv->hdev, &rect);
}
static const struct drm_plane_helper_funcs hyperv_plane_helper_funcs = {
DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
.atomic_check = hyperv_plane_atomic_check,
.atomic_update = hyperv_plane_atomic_update,
.get_scanout_buffer = hyperv_plane_get_scanout_buffer,
.panic_flush = hyperv_plane_panic_flush,
};
static const struct drm_plane_funcs hyperv_plane_funcs = {