Commit 3671f377 authored by Ryosuke Yasuoka's avatar Ryosuke Yasuoka Committed by Jocelyn Falempe
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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: default avatarRyosuke Yasuoka <ryasuoka@redhat.com>
Reviewed-by: default avatarJocelyn Falempe <jfalempe@redhat.com>
Link: https://lore.kernel.org/r/20250526090117.80593-2-ryasuoka@redhat.com


Signed-off-by: default avatarJocelyn Falempe <jfalempe@redhat.com>
parent 0b3d9942

drivers/gpu/drm/hyperv/hyperv_drm_modeset.c

+36 −0
Original line number Diff line number Diff line
@@ -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 = {