firmware: coreboot: Add coreboot framebuffer driver

Register a simplefb framebuffer when the coreboot table contains a
framebuffer entry.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/firmware/google/coreboot_table.h b/drivers/firmware/google/coreboot_table.h
index 26a3f3f3ac9c..8ad95a94481b 100644
--- a/drivers/firmware/google/coreboot_table.h
+++ b/drivers/firmware/google/coreboot_table.h
@@ -3,6 +3,7 @@
  *
  * Internal header for coreboot table access.
  *
+ * Copyright 2014 Gerd Hoffmann <kraxel@redhat.com>
  * Copyright 2017 Google Inc.
  * Copyright 2017 Samuel Holland <samuel@sholland.org>
  *
@@ -46,12 +47,33 @@ struct lb_cbmem_ref {
 	u64 cbmem_addr;
 };
 
+/* Describes framebuffer setup by coreboot */
+struct lb_framebuffer {
+	u32 tag;
+	u32 size;
+
+	u64 physical_address;
+	u32 x_resolution;
+	u32 y_resolution;
+	u32 bytes_per_line;
+	u8  bits_per_pixel;
+	u8  red_mask_pos;
+	u8  red_mask_size;
+	u8  green_mask_pos;
+	u8  green_mask_size;
+	u8  blue_mask_pos;
+	u8  blue_mask_size;
+	u8  reserved_mask_pos;
+	u8  reserved_mask_size;
+};
+
 /* A device, additionally with information from coreboot. */
 struct coreboot_device {
 	struct device dev;
 	union {
 		struct coreboot_table_entry entry;
 		struct lb_cbmem_ref cbmem_ref;
+		struct lb_framebuffer framebuffer;
 	};
 };