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path: root/drivers/gpu/drm/drm_panic.c
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Diffstat (limited to 'drivers/gpu/drm/drm_panic.c')
-rw-r--r--drivers/gpu/drm/drm_panic.c88
1 files changed, 70 insertions, 18 deletions
diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
index 948aed00595e..eff4598e2fc7 100644
--- a/drivers/gpu/drm/drm_panic.c
+++ b/drivers/gpu/drm/drm_panic.c
@@ -27,6 +27,8 @@
#include <drm/drm_plane.h>
#include <drm/drm_print.h>
+#include "drm_crtc_internal.h"
+
MODULE_AUTHOR("Jocelyn Falempe");
MODULE_DESCRIPTION("DRM panic handler");
MODULE_LICENSE("GPL");
@@ -76,11 +78,15 @@ struct drm_panic_line {
#define PANIC_LINE(s) {.len = sizeof(s) - 1, .txt = s}
static struct drm_panic_line panic_msg[] = {
- PANIC_LINE("KERNEL PANIC !"),
+ PANIC_LINE("KERNEL PANIC!"),
PANIC_LINE(""),
PANIC_LINE("Please reboot your computer."),
+ PANIC_LINE(""),
+ PANIC_LINE(""), /* will be replaced by the panic description */
};
+#define PANIC_MSG_LINES ARRAY_SIZE(panic_msg)
+
static const struct drm_panic_line logo_ascii[] = {
PANIC_LINE(" .--. _"),
PANIC_LINE(" |o_o | | |"),
@@ -91,6 +97,8 @@ static const struct drm_panic_line logo_ascii[] = {
PANIC_LINE(" \\___)=(___/"),
};
+#define PANIC_LOGO_LINES ARRAY_SIZE(logo_ascii)
+
#if defined(CONFIG_LOGO) && !defined(MODULE)
static const struct linux_logo *logo_mono;
@@ -485,13 +493,12 @@ static void draw_txt_rectangle(struct drm_scanout_buffer *sb,
static void draw_panic_static_user(struct drm_scanout_buffer *sb)
{
- size_t msg_lines = ARRAY_SIZE(panic_msg);
- size_t logo_ascii_lines = ARRAY_SIZE(logo_ascii);
u32 fg_color = convert_from_xrgb8888(CONFIG_DRM_PANIC_FOREGROUND_COLOR, sb->format->format);
u32 bg_color = convert_from_xrgb8888(CONFIG_DRM_PANIC_BACKGROUND_COLOR, sb->format->format);
const struct font_desc *font = get_default_font(sb->width, sb->height, NULL, NULL);
struct drm_rect r_screen, r_logo, r_msg;
unsigned int logo_width, logo_height;
+ unsigned int msg_width, msg_height;
if (!font)
return;
@@ -502,14 +509,14 @@ static void draw_panic_static_user(struct drm_scanout_buffer *sb)
logo_width = logo_mono->width;
logo_height = logo_mono->height;
} else {
- logo_width = get_max_line_len(logo_ascii, logo_ascii_lines) * font->width;
- logo_height = logo_ascii_lines * font->height;
+ logo_width = get_max_line_len(logo_ascii, PANIC_LOGO_LINES) * font->width;
+ logo_height = PANIC_LOGO_LINES * font->height;
}
-
r_logo = DRM_RECT_INIT(0, 0, logo_width, logo_height);
- r_msg = DRM_RECT_INIT(0, 0,
- min(get_max_line_len(panic_msg, msg_lines) * font->width, sb->width),
- min(msg_lines * font->height, sb->height));
+
+ msg_width = min(get_max_line_len(panic_msg, PANIC_MSG_LINES) * font->width, sb->width);
+ msg_height = min(PANIC_MSG_LINES * font->height, sb->height);
+ r_msg = DRM_RECT_INIT(0, 0, msg_width, msg_height);
/* Center the panic message */
drm_rect_translate(&r_msg, (sb->width - r_msg.x2) / 2, (sb->height - r_msg.y2) / 2);
@@ -523,10 +530,10 @@ static void draw_panic_static_user(struct drm_scanout_buffer *sb)
drm_panic_blit(sb, &r_logo, logo_mono->data, DIV_ROUND_UP(logo_width, 8),
fg_color);
else
- draw_txt_rectangle(sb, font, logo_ascii, logo_ascii_lines, false, &r_logo,
+ draw_txt_rectangle(sb, font, logo_ascii, PANIC_LOGO_LINES, false, &r_logo,
fg_color);
}
- draw_txt_rectangle(sb, font, panic_msg, msg_lines, true, &r_msg, fg_color);
+ draw_txt_rectangle(sb, font, panic_msg, PANIC_MSG_LINES, true, &r_msg, fg_color);
}
/*
@@ -631,7 +638,31 @@ static void draw_panic_dispatch(struct drm_scanout_buffer *sb)
}
}
-static void draw_panic_plane(struct drm_plane *plane)
+static void drm_panic_set_description(const char *description)
+{
+ u32 len;
+
+ if (description) {
+ struct drm_panic_line *desc_line = &panic_msg[PANIC_MSG_LINES - 1];
+
+ desc_line->txt = description;
+ len = strlen(description);
+ /* ignore the last newline character */
+ if (len && description[len - 1] == '\n')
+ len -= 1;
+ desc_line->len = len;
+ }
+}
+
+static void drm_panic_clear_description(void)
+{
+ struct drm_panic_line *desc_line = &panic_msg[PANIC_MSG_LINES - 1];
+
+ desc_line->len = 0;
+ desc_line->txt = NULL;
+}
+
+static void draw_panic_plane(struct drm_plane *plane, const char *description)
{
struct drm_scanout_buffer sb = { };
int ret;
@@ -640,6 +671,8 @@ static void draw_panic_plane(struct drm_plane *plane)
if (!drm_panic_trylock(plane->dev, flags))
return;
+ drm_panic_set_description(description);
+
ret = plane->helper_private->get_scanout_buffer(plane, &sb);
if (!ret && drm_panic_is_format_supported(sb.format)) {
@@ -647,6 +680,7 @@ static void draw_panic_plane(struct drm_plane *plane)
if (plane->helper_private->panic_flush)
plane->helper_private->panic_flush(plane);
}
+ drm_panic_clear_description();
drm_panic_unlock(plane->dev, flags);
}
@@ -655,12 +689,12 @@ static struct drm_plane *to_drm_plane(struct kmsg_dumper *kd)
return container_of(kd, struct drm_plane, kmsg_panic);
}
-static void drm_panic(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason)
+static void drm_panic(struct kmsg_dumper *dumper, struct kmsg_dump_detail *detail)
{
struct drm_plane *plane = to_drm_plane(dumper);
- if (reason == KMSG_DUMP_PANIC)
- draw_panic_plane(plane);
+ if (detail->reason == KMSG_DUMP_PANIC)
+ draw_panic_plane(plane, detail->description);
}
@@ -680,7 +714,7 @@ static ssize_t debugfs_trigger_write(struct file *file, const char __user *user_
if (kstrtobool_from_user(user_buf, count, &run) == 0 && run) {
struct drm_plane *plane = file->private_data;
- draw_panic_plane(plane);
+ draw_panic_plane(plane, "Test from debugfs");
}
return count;
}
@@ -704,6 +738,26 @@ static void debugfs_register_plane(struct drm_plane *plane, int index) {}
#endif /* CONFIG_DRM_PANIC_DEBUG */
/**
+ * drm_panic_is_enabled
+ * @dev: the drm device that may supports drm_panic
+ *
+ * returns true if the drm device supports drm_panic
+ */
+bool drm_panic_is_enabled(struct drm_device *dev)
+{
+ struct drm_plane *plane;
+
+ if (!dev->mode_config.num_total_plane)
+ return false;
+
+ drm_for_each_plane(plane, dev)
+ if (plane->helper_private && plane->helper_private->get_scanout_buffer)
+ return true;
+ return false;
+}
+EXPORT_SYMBOL(drm_panic_is_enabled);
+
+/**
* drm_panic_register() - Initialize DRM panic for a device
* @dev: the drm device on which the panic screen will be displayed.
*/
@@ -730,7 +784,6 @@ void drm_panic_register(struct drm_device *dev)
if (registered_plane)
drm_info(dev, "Registered %d planes with drm panic\n", registered_plane);
}
-EXPORT_SYMBOL(drm_panic_register);
/**
* drm_panic_unregister()
@@ -749,4 +802,3 @@ void drm_panic_unregister(struct drm_device *dev)
kmsg_dump_unregister(&plane->kmsg_panic);
}
}
-EXPORT_SYMBOL(drm_panic_unregister);
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-04-03 03:38:46 +0000