mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-05-05 09:57:21 +02:00
Thomas Zimmermann
058fc04b85
Add fields and constants for coreboot framebuffer orientation. Set corebootdrm's DRM connector state from the values. Not all firmware provides orientation, so make it optional. Systems without, continue to use unknown orientation. v3: - comment on _HAS_ORIENTATION semantics (Tzung-Bi) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Acked-by: Julius Werner <jwerner@chromium.org> Acked-by: Tzung-Bi Shih <tzungbi@kernel.org> # coreboot Link: https://patch.msgid.link/20260217155836.96267-13-tzimmermann@suse.de
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* coreboot.h
|
|
*
|
|
* Coreboot device and driver interfaces.
|
|
*
|
|
* Copyright 2014 Gerd Hoffmann <kraxel@redhat.com>
|
|
* Copyright 2017 Google Inc.
|
|
* Copyright 2017 Samuel Holland <samuel@sholland.org>
|
|
*/
|
|
|
|
#ifndef _LINUX_COREBOOT_H
|
|
#define _LINUX_COREBOOT_H
|
|
|
|
#include <linux/compiler_attributes.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/types.h>
|
|
|
|
typedef __aligned(4) u64 cb_u64;
|
|
|
|
/* List of coreboot entry structures that is used */
|
|
|
|
#define CB_TAG_FRAMEBUFFER 0x12
|
|
#define LB_TAG_CBMEM_ENTRY 0x31
|
|
|
|
/* Generic */
|
|
struct coreboot_table_entry {
|
|
u32 tag;
|
|
u32 size;
|
|
};
|
|
|
|
/* Points to a CBMEM entry */
|
|
struct lb_cbmem_ref {
|
|
u32 tag;
|
|
u32 size;
|
|
|
|
cb_u64 cbmem_addr;
|
|
};
|
|
|
|
/* Corresponds to LB_TAG_CBMEM_ENTRY */
|
|
struct lb_cbmem_entry {
|
|
u32 tag;
|
|
u32 size;
|
|
|
|
cb_u64 address;
|
|
u32 entry_size;
|
|
u32 id;
|
|
};
|
|
|
|
#define LB_FRAMEBUFFER_ORIENTATION_NORMAL 0
|
|
#define LB_FRAMEBUFFER_ORIENTATION_BOTTOM_UP 1
|
|
#define LB_FRAMEBUFFER_ORIENTATION_LEFT_UP 2
|
|
#define LB_FRAMEBUFFER_ORIENTATION_RIGHT_UP 3
|
|
|
|
/* Describes framebuffer setup by coreboot */
|
|
struct lb_framebuffer {
|
|
u32 tag;
|
|
u32 size;
|
|
|
|
cb_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;
|
|
u8 orientation;
|
|
};
|
|
|
|
/*
|
|
* True if the coreboot-provided data is large enough to hold information
|
|
* on the linear framebuffer. False otherwise.
|
|
*/
|
|
#define LB_FRAMEBUFFER_HAS_LFB(__fb) \
|
|
((__fb)->size >= offsetofend(struct lb_framebuffer, reserved_mask_size))
|
|
|
|
/*
|
|
* True if the coreboot-provided data is large enough to hold information
|
|
* on the display orientation. False otherwise.
|
|
*/
|
|
#define LB_FRAMEBUFFER_HAS_ORIENTATION(__fb) \
|
|
((__fb)->size >= offsetofend(struct lb_framebuffer, orientation))
|
|
|
|
#endif /* _LINUX_COREBOOT_H */
|