Hi Am 27.09.23 um 19:22 schrieb Jocelyn Falempe:
Add support for the drm_panic module, which displays a user-friendly message to the screen when a kernel panic occurs. Signed-off-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx> --- drivers/gpu/drm/tiny/simpledrm.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c index 25e11ef11c4c..f0454b58ead3 100644 --- a/drivers/gpu/drm/tiny/simpledrm.c +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -23,6 +23,7 @@ #include <drm/drm_gem_shmem_helper.h> #include <drm/drm_managed.h> #include <drm/drm_modeset_helper_vtables.h> +#include <drm/drm_panic.h> #include <drm/drm_plane_helper.h> #include <drm/drm_probe_helper.h>@@ -838,10 +839,24 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv,return ERR_PTR(ret);drm_mode_config_reset(dev);+ drm_panic_register(dev);
These calls should be part of drm_device_register(). Everything should work transparently to the driver until DRM panic actually calls the get_scanout_buffer callback.
Best regards Thomas
return sdev;}+static int simpledrm_get_scanout_buffer(struct drm_device *dev,+ struct drm_scanout_buffer *sb) +{ + struct simpledrm_device *sdev = simpledrm_device_of_dev(dev); + + sb->width = sdev->mode.hdisplay; + sb->height = sdev->mode.vdisplay; + sb->pitch = sdev->pitch; + sb->format = sdev->format; + sb->map = sdev->screen_base; + return 0; +} + /* * DRM driver */ @@ -857,6 +872,7 @@ static struct drm_driver simpledrm_driver = { .minor = DRIVER_MINOR, .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET, .fops = &simpledrm_fops, + .get_scanout_buffer = simpledrm_get_scanout_buffer, };/*@@ -894,6 +910,7 @@ static int simpledrm_remove(struct platform_device *pdev) struct drm_device *dev = &sdev->dev;drm_dev_unplug(dev);+ drm_panic_unregister(dev);return 0;}
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstrasse 146, 90461 Nuernberg, Germany GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman HRB 36809 (AG Nuernberg)
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