xref: /linux/drivers/gpu/drm/ast/ast_vbios.h (revision 1260ed77798502de9c98020040d2995008de10cc)

/* SPDX-License-Identifier: MIT */
/*
 * Copyright (c) 2005 ASPEED Technology Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of the authors not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  The authors makes no representations
 * about the suitability of this software for any purpose.  It is provided
 * "as is" without express or implied warranty.
 *
 * THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */
/* Ported from xf86-video-ast driver */

#ifndef AST_VBIOS_H
#define AST_VBIOS_H

#include <linux/types.h>

struct ast_device;
struct drm_display_mode;

#define Charx8Dot               0x00000001
#define HalfDCLK                0x00000002
#define DoubleScanMode          0x00000004
#define LineCompareOff          0x00000008
#define HBorder                 0x00000020
#define VBorder                 0x00000010
#define WideScreenMode		0x00000100
#define NewModeInfo		0x00000200
#define NHSync			0x00000400
#define PHSync			0x00000800
#define NVSync			0x00001000
#define PVSync			0x00002000
#define SyncPP			(PVSync | PHSync)
#define SyncPN			(PVSync | NHSync)
#define SyncNP			(NVSync | PHSync)
#define SyncNN			(NVSync | NHSync)
#define AST2500PreCatchCRT		0x00004000

/* DCLK Index */
#define VCLK25_175		0x00
#define VCLK28_322		0x01
#define VCLK31_5		0x02
#define VCLK36			0x03
#define VCLK40			0x04
#define VCLK49_5		0x05
#define VCLK50			0x06
#define VCLK56_25		0x07
#define VCLK65			0x08
#define VCLK75			0x09
#define VCLK78_75		0x0a
#define VCLK94_5		0x0b
#define VCLK108			0x0c
#define VCLK135			0x0d
#define VCLK157_5		0x0e
#define VCLK162			0x0f
/* #define VCLK193_25		0x10 */
#define VCLK154			0x10
#define VCLK83_5		0x11
#define VCLK106_5		0x12
#define VCLK146_25		0x13
#define VCLK148_5		0x14
#define VCLK71			0x15
#define VCLK88_75		0x16
#define VCLK119			0x17
#define VCLK85_5		0x18
#define VCLK97_75		0x19
#define VCLK118_25		0x1a

struct ast_vbios_enhtable {
	u32 ht;
	u32 hde;
	u32 hfp;
	u32 hsync;
	u32 vt;
	u32 vde;
	u32 vfp;
	u32 vsync;
	u32 dclk_index;
	u32 flags;
	u32 refresh_rate;
	u32 refresh_rate_index;
	u32 mode_id;
};

#define AST_VBIOS_INVALID_MODE \
	{0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u}

static inline bool ast_vbios_mode_is_valid(const struct ast_vbios_enhtable *vmode)
{
	return vmode->ht && vmode->vt && vmode->refresh_rate;
}

const struct ast_vbios_enhtable *ast_vbios_find_mode(const struct ast_device *ast,
						     const struct drm_display_mode *mode);

#endif