1 /*
2  * Copyright (C) 2008 Maarten Maathuis.
3  * All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining
6  * a copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sublicense, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the
14  * next paragraph) shall be included in all copies or substantial
15  * portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  *
25  */
26 
27 #ifndef __NOUVEAU_ENCODER_H__
28 #define __NOUVEAU_ENCODER_H__
29 #include <nvif/outp.h>
30 #include <subdev/bios/dcb.h>
31 
32 #include <drm/display/drm_dp_helper.h>
33 #include <drm/display/drm_dp_mst_helper.h>
34 #include <drm/drm_encoder_slave.h>
35 
36 #include "dispnv04/disp.h"
37 
38 struct nv50_head_atom;
39 struct nouveau_connector;
40 
41 #define NV_DPMS_CLEARED 0x80
42 
43 struct nvkm_i2c_port;
44 
45 struct nouveau_encoder {
46 	struct drm_encoder_slave base;
47 
48 	struct dcb_output *dcb;
49 	struct nvif_outp outp;
50 	int or;
51 	int link;
52 
53 	struct i2c_adapter *i2c;
54 	struct nvkm_i2c_aux *aux;
55 
56 	/* different to drm_encoder.crtc, this reflects what's
57 	 * actually programmed on the hw, not the proposed crtc */
58 	struct drm_crtc *crtc;
59 	u32 ctrl;
60 
61 	/* Protected by nouveau_drm.audio.lock */
62 	struct {
63 		bool enabled;
64 		struct drm_connector *connector;
65 	} audio;
66 
67 	struct drm_display_mode mode;
68 	int last_dpms;
69 
70 	struct nv04_output_reg restore;
71 
72 	union {
73 		struct {
74 			struct nv50_mstm *mstm;
75 			int link_nr;
76 			int link_bw;
77 
78 			/* Protects DP state that needs to be accessed outside
79 			 * connector reprobing contexts
80 			 */
81 			struct mutex hpd_irq_lock;
82 
83 			u8 dpcd[DP_RECEIVER_CAP_SIZE];
84 			u8 downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
85 			struct drm_dp_desc desc;
86 
87 			u8 sink_count;
88 		} dp;
89 	};
90 
91 	struct {
92 		bool dp_interlace : 1;
93 	} caps;
94 
95 	void (*enc_save)(struct drm_encoder *encoder);
96 	void (*enc_restore)(struct drm_encoder *encoder);
97 	void (*update)(struct nouveau_encoder *, u8 head,
98 		       struct nv50_head_atom *, u8 proto, u8 depth);
99 };
100 
101 struct nv50_mstm {
102 	struct nouveau_encoder *outp;
103 
104 	struct drm_dp_mst_topology_mgr mgr;
105 
106 	/* Protected under nouveau_encoder->dp.hpd_irq_lock */
107 	bool can_mst;
108 	bool is_mst;
109 	bool suspended;
110 
111 	bool modified;
112 	bool disabled;
113 	int links;
114 };
115 
116 struct nouveau_encoder *
117 find_encoder(struct drm_connector *connector, int type);
118 
119 static inline struct nouveau_encoder *nouveau_encoder(struct drm_encoder *enc)
120 {
121 	struct drm_encoder_slave *slave = to_encoder_slave(enc);
122 
123 	return container_of(slave, struct nouveau_encoder, base);
124 }
125 
126 static inline struct drm_encoder *to_drm_encoder(struct nouveau_encoder *enc)
127 {
128 	return &enc->base.base;
129 }
130 
131 static inline const struct drm_encoder_slave_funcs *
132 get_slave_funcs(struct drm_encoder *enc)
133 {
134 	return to_encoder_slave(enc)->slave_funcs;
135 }
136 
137 /* nouveau_dp.c */
138 enum nouveau_dp_status {
139 	NOUVEAU_DP_NONE,
140 	NOUVEAU_DP_SST,
141 	NOUVEAU_DP_MST,
142 };
143 
144 int nouveau_dp_detect(struct nouveau_connector *, struct nouveau_encoder *);
145 void nouveau_dp_irq(struct nouveau_drm *drm,
146 		    struct nouveau_connector *nv_connector);
147 enum drm_mode_status nv50_dp_mode_valid(struct drm_connector *,
148 					struct nouveau_encoder *,
149 					const struct drm_display_mode *,
150 					unsigned *clock);
151 
152 struct nouveau_connector *
153 nv50_outp_get_new_connector(struct drm_atomic_state *state, struct nouveau_encoder *outp);
154 struct nouveau_connector *
155 nv50_outp_get_old_connector(struct drm_atomic_state *state, struct nouveau_encoder *outp);
156 
157 int nv50_mstm_detect(struct nouveau_encoder *encoder);
158 void nv50_mstm_remove(struct nv50_mstm *mstm);
159 bool nv50_mstm_service(struct nouveau_drm *drm,
160 		       struct nouveau_connector *nv_connector,
161 		       struct nv50_mstm *mstm);
162 #endif /* __NOUVEAU_ENCODER_H__ */
163