[PATCH v7 6/9] drm/simpledrm: Add drm_panic support

From: Jocelyn Falempe <jfalempe@redhat.com>
To: dri-devel@lists.freedesktop.org, tzimmermann@suse.de,
	airlied@redhat.com, maarten.lankhorst@linux.intel.com,
	mripard@kernel.org, daniel@ffwll.ch, javierm@redhat.com,
	bluescreen_avenger@verizon.net, noralf@tronnes.org
Cc: gpiccoli@igalia.com, Jocelyn Falempe <jfalempe@redhat.com>
Subject: [PATCH v7 6/9] drm/simpledrm: Add drm_panic support
Date: Thu,  4 Jan 2024 17:00:50 +0100	[thread overview]
Message-ID: <20240104160301.185915-7-jfalempe@redhat.com> (raw)
In-Reply-To: <20240104160301.185915-1-jfalempe@redhat.com>

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@redhat.com>
---
 drivers/gpu/drm/tiny/simpledrm.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c
index 7ce1c4617675..6dd2afee84d4 100644
--- a/drivers/gpu/drm/tiny/simpledrm.c
+++ b/drivers/gpu/drm/tiny/simpledrm.c
@@ -25,6 +25,7 @@
 #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_probe_helper.h>
 
 #define DRIVER_NAME	"simpledrm"
@@ -985,6 +986,19 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv,
 	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
  */
@@ -1000,6 +1014,7 @@ 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,
 };
 
 /*
-- 
2.43.0

