xref: /openbmc/linux/drivers/gpu/drm/i915/gvt/display.h (revision b01739fb)
1 /*
2  * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21  * SOFTWARE.
22  *
23  * Authors:
24  *    Ke Yu
25  *    Zhiyuan Lv <zhiyuan.lv@intel.com>
26  *
27  * Contributors:
28  *    Terrence Xu <terrence.xu@intel.com>
29  *    Changbin Du <changbin.du@intel.com>
30  *    Bing Niu <bing.niu@intel.com>
31  *    Zhi Wang <zhi.a.wang@intel.com>
32  *
33  */
34 
35 #ifndef _GVT_DISPLAY_H_
36 #define _GVT_DISPLAY_H_
37 
38 #include <linux/types.h>
39 #include <linux/hrtimer.h>
40 
41 struct intel_gvt;
42 struct intel_vgpu;
43 
44 #define SBI_REG_MAX	20
45 #define DPCD_SIZE	0x700
46 
47 #define intel_vgpu_port(vgpu, port) \
48 	(&(vgpu->display.ports[port]))
49 
50 #define intel_vgpu_has_monitor_on_port(vgpu, port) \
51 	(intel_vgpu_port(vgpu, port)->edid && \
52 		intel_vgpu_port(vgpu, port)->edid->data_valid)
53 
54 #define intel_vgpu_port_is_dp(vgpu, port) \
55 	((intel_vgpu_port(vgpu, port)->type == GVT_DP_A) || \
56 	(intel_vgpu_port(vgpu, port)->type == GVT_DP_B) || \
57 	(intel_vgpu_port(vgpu, port)->type == GVT_DP_C) || \
58 	(intel_vgpu_port(vgpu, port)->type == GVT_DP_D))
59 
60 #define INTEL_GVT_MAX_UEVENT_VARS	3
61 
62 /* DPCD start */
63 #define DPCD_SIZE	0x700
64 
65 /* DPCD */
66 #define DP_SET_POWER            0x600
67 #define DP_SET_POWER_D0         0x1
68 #define AUX_NATIVE_WRITE        0x8
69 #define AUX_NATIVE_READ         0x9
70 
71 #define AUX_NATIVE_REPLY_MASK   (0x3 << 4)
72 #define AUX_NATIVE_REPLY_ACK    (0x0 << 4)
73 #define AUX_NATIVE_REPLY_NAK    (0x1 << 4)
74 #define AUX_NATIVE_REPLY_DEFER  (0x2 << 4)
75 
76 #define AUX_BURST_SIZE          20
77 
78 /* DPCD addresses */
79 #define DPCD_REV			0x000
80 #define DPCD_MAX_LINK_RATE		0x001
81 #define DPCD_MAX_LANE_COUNT		0x002
82 
83 #define DPCD_TRAINING_PATTERN_SET	0x102
84 #define	DPCD_SINK_COUNT			0x200
85 #define DPCD_LANE0_1_STATUS		0x202
86 #define DPCD_LANE2_3_STATUS		0x203
87 #define DPCD_LANE_ALIGN_STATUS_UPDATED	0x204
88 #define DPCD_SINK_STATUS		0x205
89 
90 /* link training */
91 #define DPCD_TRAINING_PATTERN_SET_MASK	0x03
92 #define DPCD_LINK_TRAINING_DISABLED	0x00
93 #define DPCD_TRAINING_PATTERN_1		0x01
94 #define DPCD_TRAINING_PATTERN_2		0x02
95 
96 #define DPCD_CP_READY_MASK		(1 << 6)
97 
98 /* lane status */
99 #define DPCD_LANES_CR_DONE		0x11
100 #define DPCD_LANES_EQ_DONE		0x22
101 #define DPCD_SYMBOL_LOCKED		0x44
102 
103 #define DPCD_INTERLANE_ALIGN_DONE	0x01
104 
105 #define DPCD_SINK_IN_SYNC		0x03
106 /* DPCD end */
107 
108 #define SBI_RESPONSE_MASK               0x3
109 #define SBI_RESPONSE_SHIFT              0x1
110 #define SBI_STAT_MASK                   0x1
111 #define SBI_STAT_SHIFT                  0x0
112 #define SBI_OPCODE_SHIFT                8
113 #define SBI_OPCODE_MASK			(0xff << SBI_OPCODE_SHIFT)
114 #define SBI_CMD_IORD                    2
115 #define SBI_CMD_IOWR                    3
116 #define SBI_CMD_CRRD                    6
117 #define SBI_CMD_CRWR                    7
118 #define SBI_ADDR_OFFSET_SHIFT           16
119 #define SBI_ADDR_OFFSET_MASK            (0xffff << SBI_ADDR_OFFSET_SHIFT)
120 
121 struct intel_vgpu_sbi_register {
122 	unsigned int offset;
123 	u32 value;
124 };
125 
126 struct intel_vgpu_sbi {
127 	int number;
128 	struct intel_vgpu_sbi_register registers[SBI_REG_MAX];
129 };
130 
131 enum intel_gvt_plane_type {
132 	PRIMARY_PLANE = 0,
133 	CURSOR_PLANE,
134 	SPRITE_PLANE,
135 	MAX_PLANE
136 };
137 
138 struct intel_vgpu_dpcd_data {
139 	bool data_valid;
140 	u8 data[DPCD_SIZE];
141 };
142 
143 enum intel_vgpu_port_type {
144 	GVT_CRT = 0,
145 	GVT_DP_A,
146 	GVT_DP_B,
147 	GVT_DP_C,
148 	GVT_DP_D,
149 	GVT_HDMI_B,
150 	GVT_HDMI_C,
151 	GVT_HDMI_D,
152 	GVT_PORT_MAX
153 };
154 
155 enum intel_vgpu_edid {
156 	GVT_EDID_1024_768,
157 	GVT_EDID_1920_1200,
158 	GVT_EDID_NUM,
159 };
160 
161 #define GVT_DEFAULT_REFRESH_RATE 60
162 struct intel_vgpu_port {
163 	/* per display EDID information */
164 	struct intel_vgpu_edid_data *edid;
165 	/* per display DPCD information */
166 	struct intel_vgpu_dpcd_data *dpcd;
167 	int type;
168 	enum intel_vgpu_edid id;
169 	/* x1000 to get accurate 59.94, 24.976, 29.94, etc. in timing std. */
170 	u32 vrefresh_k;
171 };
172 
173 struct intel_vgpu_vblank_timer {
174 	struct hrtimer timer;
175 	u32 vrefresh_k;
176 	u64 period;
177 };
178 
vgpu_edid_str(enum intel_vgpu_edid id)179 static inline char *vgpu_edid_str(enum intel_vgpu_edid id)
180 {
181 	switch (id) {
182 	case GVT_EDID_1024_768:
183 		return "1024x768";
184 	case GVT_EDID_1920_1200:
185 		return "1920x1200";
186 	default:
187 		return "";
188 	}
189 }
190 
vgpu_edid_xres(enum intel_vgpu_edid id)191 static inline unsigned int vgpu_edid_xres(enum intel_vgpu_edid id)
192 {
193 	switch (id) {
194 	case GVT_EDID_1024_768:
195 		return 1024;
196 	case GVT_EDID_1920_1200:
197 		return 1920;
198 	default:
199 		return 0;
200 	}
201 }
202 
vgpu_edid_yres(enum intel_vgpu_edid id)203 static inline unsigned int vgpu_edid_yres(enum intel_vgpu_edid id)
204 {
205 	switch (id) {
206 	case GVT_EDID_1024_768:
207 		return 768;
208 	case GVT_EDID_1920_1200:
209 		return 1200;
210 	default:
211 		return 0;
212 	}
213 }
214 
215 void intel_vgpu_emulate_vblank(struct intel_vgpu *vgpu);
216 void vgpu_update_vblank_emulation(struct intel_vgpu *vgpu, bool turnon);
217 
218 int intel_vgpu_init_display(struct intel_vgpu *vgpu, u64 resolution);
219 void intel_vgpu_reset_display(struct intel_vgpu *vgpu);
220 void intel_vgpu_clean_display(struct intel_vgpu *vgpu);
221 
222 int pipe_is_enabled(struct intel_vgpu *vgpu, int pipe);
223 
224 #endif
225