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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155/* SPDX-License-Identifier: GPL-2.0 */#ifndef _SCREEN_INFO_H#define _SCREEN_INFO_H
#include <uapi/linux/screen_info.h>
#include <linux/bits.h>
/** * SCREEN_INFO_MAX_RESOURCES - maximum number of resources per screen_info */#define SCREEN_INFO_MAX_RESOURCES 3
struct pci_dev;struct pixel_format;struct resource;
static inline bool __screen_info_has_lfb(unsigned int type){ return (type == VIDEO_TYPE_VLFB) || (type == VIDEO_TYPE_EFI);}
static inline u64 __screen_info_lfb_base(const struct screen_info *si){ u64 lfb_base = si->lfb_base;
if (si->capabilities & VIDEO_CAPABILITY_64BIT_BASE) lfb_base |= (u64)si->ext_lfb_base << 32;
return lfb_base;}
static inline void __screen_info_set_lfb_base(struct screen_info *si, u64 lfb_base){ si->lfb_base = lfb_base & GENMASK_ULL(31, 0); si->ext_lfb_base = (lfb_base & GENMASK_ULL(63, 32)) >> 32;
if (si->ext_lfb_base) si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE; else si->capabilities &= ~VIDEO_CAPABILITY_64BIT_BASE;}
static inline u64 __screen_info_lfb_size(const struct screen_info *si, unsigned int type){ u64 lfb_size = si->lfb_size;
if (type == VIDEO_TYPE_VLFB) lfb_size <<= 16; return lfb_size;}
static inline bool __screen_info_vbe_mode_nonvga(const struct screen_info *si){ /* * VESA modes typically run on VGA hardware. Set bit 5 signals that this * is not the case. Drivers can then not make use of VGA resources. See * Sec 4.4 of the VBE 2.0 spec. */ return si->vesa_attributes & BIT(5);}
static inline unsigned int __screen_info_video_type(unsigned int type){ switch (type) { case VIDEO_TYPE_MDA: case VIDEO_TYPE_CGA: case VIDEO_TYPE_EGAM: case VIDEO_TYPE_EGAC: case VIDEO_TYPE_VGAC: case VIDEO_TYPE_VLFB: case VIDEO_TYPE_PICA_S3: case VIDEO_TYPE_MIPS_G364: case VIDEO_TYPE_SGI: case VIDEO_TYPE_TGAC: case VIDEO_TYPE_SUN: case VIDEO_TYPE_SUNPCI: case VIDEO_TYPE_PMAC: case VIDEO_TYPE_EFI: return type; default: return 0; }}
/** * screen_info_video_type() - Decodes the video type from struct screen_info * @si: an instance of struct screen_info * * Returns: * A VIDEO_TYPE_ constant representing si's type of video display, or 0 otherwise. */static inline unsigned int screen_info_video_type(const struct screen_info *si){ unsigned int type;
// check if display output is on if (!si->orig_video_isVGA) return 0;
// check for a known VIDEO_TYPE_ constant type = __screen_info_video_type(si->orig_video_isVGA); if (type) return si->orig_video_isVGA;
// check if text mode has been initialized if (!si->orig_video_lines || !si->orig_video_cols) return 0;
// 80x25 text, mono if (si->orig_video_mode == 0x07) { if ((si->orig_video_ega_bx & 0xff) != 0x10) return VIDEO_TYPE_EGAM; else return VIDEO_TYPE_MDA; }
// EGA/VGA, 16 colors if ((si->orig_video_ega_bx & 0xff) != 0x10) { if (si->orig_video_isVGA) return VIDEO_TYPE_VGAC; else return VIDEO_TYPE_EGAC; }
// the rest... return VIDEO_TYPE_CGA;}
static inline u32 __screen_info_vesapm_info_base(const struct screen_info *si){ if (si->vesapm_seg < 0xc000) return 0; return (si->vesapm_seg << 4) + si->vesapm_off;}
ssize_t screen_info_resources(const struct screen_info *si, struct resource *r, size_t num);
u32 __screen_info_lfb_bits_per_pixel(const struct screen_info *si);int screen_info_pixel_format(const struct screen_info *si, struct pixel_format *f);
#if defined(CONFIG_PCI)void screen_info_apply_fixups(void);struct pci_dev *screen_info_pci_dev(const struct screen_info *si);#elsestatic inline void screen_info_apply_fixups(void){ }static inline struct pci_dev *screen_info_pci_dev(const struct screen_info *si){ return NULL;}#endif
#endif /* _SCREEN_INFO_H */