From 41e54853cae973ce812346d4c2b37a2aa6e02dcf Mon Sep 17 00:00:00 2001 From: Jocelyn Falempe Date: Tue, 9 Apr 2024 18:30:45 +0200 Subject: [PATCH] drm/simpledrm: Add drm_panic support Add support for the drm_panic module, which displays a user-friendly message to the screen when a kernel panic occurs. v8: * Replace get_scanout_buffer() 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 Reviewed-by: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-7-jfalempe@redhat.com Acked-by: Daniel Vetter --- drivers/gpu/drm/tiny/simpledrm.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c index 7ce1c4617675..1d8fa07572c5 100644 --- a/drivers/gpu/drm/tiny/simpledrm.c +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #define DRIVER_NAME "simpledrm" @@ -671,11 +672,26 @@ static void simpledrm_primary_plane_helper_atomic_disable(struct drm_plane *plan drm_dev_exit(idx); } +static int simpledrm_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane, + struct drm_scanout_buffer *sb) +{ + struct simpledrm_device *sdev = simpledrm_device_of_dev(plane->dev); + + sb->width = sdev->mode.hdisplay; + sb->height = sdev->mode.vdisplay; + sb->format = sdev->format; + sb->pitch[0] = sdev->pitch; + sb->map[0] = sdev->screen_base; + + return 0; +} + static const struct drm_plane_helper_funcs simpledrm_primary_plane_helper_funcs = { DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, .atomic_check = simpledrm_primary_plane_helper_atomic_check, .atomic_update = simpledrm_primary_plane_helper_atomic_update, .atomic_disable = simpledrm_primary_plane_helper_atomic_disable, + .get_scanout_buffer = simpledrm_primary_plane_helper_get_scanout_buffer, }; static const struct drm_plane_funcs simpledrm_primary_plane_funcs = { -- 2.25.1