1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Ke Yu
* Zhiyuan Lv <zhiyuan.lv@intel.com>
*
* Contributors:
* Terrence Xu <terrence.xu@intel.com>
* Changbin Du <changbin.du@intel.com>
* Bing Niu <bing.niu@intel.com>
* Zhi Wang <zhi.a.wang@intel.com>
*
*/
#ifndef _GVT_EDID_H_
#define _GVT_EDID_H_
#include <linux/types.h>
struct intel_vgpu;
#define EDID_SIZE 128
#define EDID_ADDR 0x50 /* Linux hvm EDID addr */
#define GVT_AUX_NATIVE_WRITE 0x8
#define GVT_AUX_NATIVE_READ 0x9
#define GVT_AUX_I2C_WRITE 0x0
#define GVT_AUX_I2C_READ 0x1
#define GVT_AUX_I2C_STATUS 0x2
#define GVT_AUX_I2C_MOT 0x4
#define GVT_AUX_I2C_REPLY_ACK 0x0
struct intel_vgpu_edid_data {
bool data_valid;
unsigned char edid_block[EDID_SIZE];
};
enum gmbus_cycle_type {
GMBUS_NOCYCLE = 0x0,
NIDX_NS_W = 0x1,
IDX_NS_W = 0x3,
GMBUS_STOP = 0x4,
NIDX_STOP = 0x5,
IDX_STOP = 0x7
};
/*
* States of GMBUS
*
* GMBUS0-3 could be related to the EDID virtualization. Another two GMBUS
* registers, GMBUS4 (interrupt mask) and GMBUS5 (2 byte indes register), are
* not considered here. Below describes the usage of GMBUS registers that are
* cared by the EDID virtualization
*
* GMBUS0:
* R/W
* port selection. value of bit0 - bit2 corresponds to the GPIO registers.
*
* GMBUS1:
* R/W Protect
* Command and Status.
* bit0 is the direction bit: 1 is read; 0 is write.
* bit1 - bit7 is target 7-bit address.
* bit16 - bit24 total byte count (ignore?)
*
* GMBUS2:
* Most of bits are read only except bit 15 (IN_USE)
* Status register
* bit0 - bit8 current byte count
* bit 11: hardware ready;
*
* GMBUS3:
* Read/Write
* Data for transfer
*/
/* From hw specs, Other phases like START, ADDRESS, INDEX
* are invisible to GMBUS MMIO interface. So no definitions
* in below enum types
*/
enum gvt_gmbus_phase {
GMBUS_IDLE_PHASE = 0,
GMBUS_DATA_PHASE,
GMBUS_WAIT_PHASE,
//GMBUS_STOP_PHASE,
GMBUS_MAX_PHASE
};
struct intel_vgpu_i2c_gmbus {
unsigned int total_byte_count; /* from GMBUS1 */
enum gmbus_cycle_type cycle_type;
enum gvt_gmbus_phase phase;
};
struct intel_vgpu_i2c_aux_ch {
bool i2c_over_aux_ch;
bool aux_ch_mot;
};
enum i2c_state {
I2C_NOT_SPECIFIED = 0,
I2C_GMBUS = 1,
I2C_AUX_CH = 2
};
/* I2C sequences cannot interleave.
* GMBUS and AUX_CH sequences cannot interleave.
*/
struct intel_vgpu_i2c_edid {
enum i2c_state state;
unsigned int port;
bool target_selected;
bool edid_available;
unsigned int current_edid_read;
struct intel_vgpu_i2c_gmbus gmbus;
struct intel_vgpu_i2c_aux_ch aux_ch;
};
void intel_vgpu_init_i2c_edid(struct intel_vgpu *vgpu);
int intel_gvt_i2c_handle_gmbus_read(struct intel_vgpu *vgpu,
unsigned int offset, void *p_data, unsigned int bytes);
int intel_gvt_i2c_handle_gmbus_write(struct intel_vgpu *vgpu,
unsigned int offset, void *p_data, unsigned int bytes);
void intel_gvt_i2c_handle_aux_ch_write(struct intel_vgpu *vgpu,
int port_idx,
unsigned int offset,
void *p_data);
#endif /*_GVT_EDID_H_*/
|
