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)
Signed-off-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx>
---
drivers/gpu/drm/mgag200/mgag200_drv.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c
index abddf37f0ea1..7bfcc66485db 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.c
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.c
@@ -12,10 +12,12 @@
#include <drm/drm_aperture.h>
#include <drm/drm_drv.h>
#include <drm/drm_fbdev_generic.h>
+#include <drm/drm_framebuffer.h>
#include <drm/drm_file.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_managed.h>
#include <drm/drm_module.h>
+#include <drm/drm_panic.h>
#include <drm/drm_pciids.h>
#include "mgag200_drv.h"
@@ -83,6 +85,28 @@ resource_size_t mgag200_probe_vram(void __iomem *mem, resource_size_t size)
return offset - 65536;
}
+static int mgag200_get_scanout_buffer(struct drm_device *dev,
+ struct drm_scanout_buffer *sb)
+{
+ struct drm_plane *plane;
+ struct mga_device *mdev = to_mga_device(dev);
+ struct iosys_map map = IOSYS_MAP_INIT_VADDR_IOMEM(mdev->vram);
+
+ /* find the primary and visible plane */
+ drm_for_each_plane(plane, dev) {
+ if (!plane->state || !plane->state->visible || !plane->state->fb ||
+ plane->type != DRM_PLANE_TYPE_PRIMARY)
+ continue;
+ sb->format = plane->state->fb->format;
+ sb->width = plane->state->fb->width;
+ sb->height = plane->state->fb->height;
+ sb->pitch = plane->state->fb->pitches[0];
+ sb->map = map;
+ return 0;
+ }
+ return -ENODEV;
+}
+
/*
* DRM driver
*/
@@ -98,6 +122,7 @@ static const struct drm_driver mgag200_driver = {
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
.patchlevel = DRIVER_PATCHLEVEL,
+ .get_scanout_buffer = mgag200_get_scanout_buffer,
DRM_GEM_SHMEM_DRIVER_OPS,
};
--
2.41.0
