ast_vbios.h

  1/* SPDX-License-Identifier: MIT */
  2/*
  3 * Copyright (c) 2005 ASPEED Technology Inc.
  4 *
  5 * Permission to use, copy, modify, distribute, and sell this software and its
  6 * documentation for any purpose is hereby granted without fee, provided that
  7 * the above copyright notice appear in all copies and that both that
  8 * copyright notice and this permission notice appear in supporting
  9 * documentation, and that the name of the authors not be used in
 10 * advertising or publicity pertaining to distribution of the software without
 11 * specific, written prior permission.  The authors makes no representations
 12 * about the suitability of this software for any purpose.  It is provided
 13 * "as is" without express or implied warranty.
 14 *
 15 * THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 17 * EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 21 * PERFORMANCE OF THIS SOFTWARE.
 22 */
 23/* Ported from xf86-video-ast driver */
 24
 25#ifndef AST_VBIOS_H
 26#define AST_VBIOS_H
 27
 28#include <linux/types.h>
 29
 30struct ast_device;
 31struct drm_display_mode;
 32
 33#define Charx8Dot               0x00000001
 34#define HalfDCLK                0x00000002
 35#define DoubleScanMode          0x00000004
 36#define LineCompareOff          0x00000008
 37#define HBorder                 0x00000020
 38#define VBorder                 0x00000010
 39#define WideScreenMode		0x00000100
 40#define NewModeInfo		0x00000200
 41#define NHSync			0x00000400
 42#define PHSync			0x00000800
 43#define NVSync			0x00001000
 44#define PVSync			0x00002000
 45#define SyncPP			(PVSync | PHSync)
 46#define SyncPN			(PVSync | NHSync)
 47#define SyncNP			(NVSync | PHSync)
 48#define SyncNN			(NVSync | NHSync)
 49#define AST2500PreCatchCRT		0x00004000
 50
 51/* DCLK Index */
 52#define VCLK25_175		0x00
 53#define VCLK28_322		0x01
 54#define VCLK31_5		0x02
 55#define VCLK36			0x03
 56#define VCLK40			0x04
 57#define VCLK49_5		0x05
 58#define VCLK50			0x06
 59#define VCLK56_25		0x07
 60#define VCLK65			0x08
 61#define VCLK75			0x09
 62#define VCLK78_75		0x0a
 63#define VCLK94_5		0x0b
 64#define VCLK108			0x0c
 65#define VCLK135			0x0d
 66#define VCLK157_5		0x0e
 67#define VCLK162			0x0f
 68/* #define VCLK193_25		0x10 */
 69#define VCLK154			0x10
 70#define VCLK83_5		0x11
 71#define VCLK106_5		0x12
 72#define VCLK146_25		0x13
 73#define VCLK148_5		0x14
 74#define VCLK71			0x15
 75#define VCLK88_75		0x16
 76#define VCLK119			0x17
 77#define VCLK85_5		0x18
 78#define VCLK97_75		0x19
 79#define VCLK118_25		0x1a
 80
 81struct ast_vbios_enhtable {
 82	u32 ht;
 83	u32 hde;
 84	u32 hfp;
 85	u32 hsync;
 86	u32 vt;
 87	u32 vde;
 88	u32 vfp;
 89	u32 vsync;
 90	u32 dclk_index;
 91	u32 flags;
 92	u32 refresh_rate;
 93	u32 refresh_rate_index;
 94	u32 mode_id;
 95};
 96
 97#define AST_VBIOS_INVALID_MODE \
 98	{0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u}
 99
100static inline bool ast_vbios_mode_is_valid(const struct ast_vbios_enhtable *vmode)
101{
102	return vmode->ht && vmode->vt && vmode->refresh_rate;
103}
104
105const struct ast_vbios_enhtable *ast_vbios_find_mode(const struct ast_device *ast,
106						     const struct drm_display_mode *mode);
107
108#endif