Commit 7e64f7c8 authored by Jocelyn Falempe's avatar Jocelyn Falempe
Browse files

drm/mgag200: Add drm_panic support 



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)

v7:
 * use drm_for_each_primary_visible_plane()

v8:
 * Replace get_scanout_buffer() logic 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: default avatarJocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-8-jfalempe@redhat.com


Acked-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 41e54853

drivers/gpu/drm/mgag200/mgag200_drv.h

+6 −1
Original line number Diff line number Diff line
@@ -366,6 +366,7 @@ struct drm_crtc_state; 
struct drm_display_mode;

struct drm_plane;

struct drm_atomic_state;

struct drm_scanout_buffer;



extern const uint32_t mgag200_primary_plane_formats[];

extern const size_t   mgag200_primary_plane_formats_size;
@@ -379,12 +380,16 @@ void mgag200_primary_plane_helper_atomic_enable(struct drm_plane *plane, 
						struct drm_atomic_state *state);

void mgag200_primary_plane_helper_atomic_disable(struct drm_plane *plane,

						 struct drm_atomic_state *old_state);

int mgag200_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane,

						    struct drm_scanout_buffer *sb);



#define MGAG200_PRIMARY_PLANE_HELPER_FUNCS \

	DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, \

	.atomic_check = mgag200_primary_plane_helper_atomic_check, \

	.atomic_update = mgag200_primary_plane_helper_atomic_update, \

	.atomic_enable = mgag200_primary_plane_helper_atomic_enable, \

	.atomic_disable = mgag200_primary_plane_helper_atomic_disable

	.atomic_disable = mgag200_primary_plane_helper_atomic_disable, \

	.get_scanout_buffer = mgag200_primary_plane_helper_get_scanout_buffer



#define MGAG200_PRIMARY_PLANE_FUNCS \

	.update_plane = drm_atomic_helper_update_plane, \

drivers/gpu/drm/mgag200/mgag200_mode.c

+18 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <drm/drm_framebuffer.h>

#include <drm/drm_gem_atomic_helper.h>

#include <drm/drm_gem_framebuffer_helper.h>

#include <drm/drm_panic.h>

#include <drm/drm_print.h>



#include "mgag200_drv.h"
@@ -546,6 +547,23 @@ void mgag200_primary_plane_helper_atomic_disable(struct drm_plane *plane, 
	msleep(20);

}



int mgag200_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane,

						    struct drm_scanout_buffer *sb)

{

	struct mga_device *mdev = to_mga_device(plane->dev);

	struct iosys_map map = IOSYS_MAP_INIT_VADDR_IOMEM(mdev->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;

}



/*

 * CRTC

 */