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 
30 #include <subdev/bios/dcb.h>
31 
32 #include <drm/drm_encoder_slave.h>
33 #include <drm/dp/drm_dp_helper.h>
34 #include <drm/dp/drm_dp_mst_helper.h>
35 #include "dispnv04/disp.h"
36 struct nv50_head_atom;
37 struct nouveau_connector;
38 
39 #define NV_DPMS_CLEARED 0x80
40 
41 struct nvkm_i2c_port;
42 
43 struct nouveau_encoder {
44 	struct drm_encoder_slave base;
45 
46 	struct dcb_output *dcb;
47 	int or;
48 	int link;
49 
50 	struct i2c_adapter *i2c;
51 	struct nvkm_i2c_aux *aux;
52 
53 	/* different to drm_encoder.crtc, this reflects what's
54 	 * actually programmed on the hw, not the proposed crtc */
55 	struct drm_crtc *crtc;
56 	u32 ctrl;
57 
58 	/* Protected by nouveau_drm.audio.lock */
59 	struct {
60 		bool enabled;
61 		struct drm_connector *connector;
62 	} audio;
63 
64 	struct drm_display_mode mode;
65 	int last_dpms;
66 
67 	struct nv04_output_reg restore;
68 
69 	union {
70 		struct {
71 			struct nv50_mstm *mstm;
72 			int link_nr;
73 			int link_bw;
74 
75 			/* Protects DP state that needs to be accessed outside
76 			 * connector reprobing contexts
77 			 */
78 			struct mutex hpd_irq_lock;
79 
80 			u8 dpcd[DP_RECEIVER_CAP_SIZE];
81 			u8 downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
82 			struct drm_dp_desc desc;
83 
84 			u8 sink_count;
85 		} dp;
86 	};
87 
88 	struct {
89 		bool dp_interlace : 1;
90 	} caps;
91 
92 	void (*enc_save)(struct drm_encoder *encoder);
93 	void (*enc_restore)(struct drm_encoder *encoder);
94 	void (*update)(struct nouveau_encoder *, u8 head,
95 		       struct nv50_head_atom *, u8 proto, u8 depth);
96 };
97 
98 struct nv50_mstm {
99 	struct nouveau_encoder *outp;
100 
101 	struct drm_dp_mst_topology_mgr mgr;
102 
103 	/* Protected under nouveau_encoder->dp.hpd_irq_lock */
104 	bool can_mst;
105 	bool is_mst;
106 	bool suspended;
107 
108 	bool modified;
109 	bool disabled;
110 	int links;
111 };
112 
113 struct nouveau_encoder *
114 find_encoder(struct drm_connector *connector, int type);
115 
116 static inline struct nouveau_encoder *nouveau_encoder(struct drm_encoder *enc)
117 {
118 	struct drm_encoder_slave *slave = to_encoder_slave(enc);
119 
120 	return container_of(slave, struct nouveau_encoder, base);
121 }
122 
123 static inline struct drm_encoder *to_drm_encoder(struct nouveau_encoder *enc)
124 {
125 	return &enc->base.base;
126 }
127 
128 static inline const struct drm_encoder_slave_funcs *
129 get_slave_funcs(struct drm_encoder *enc)
130 {
131 	return to_encoder_slave(enc)->slave_funcs;
132 }
133 
134 /* nouveau_dp.c */
135 enum nouveau_dp_status {
136 	NOUVEAU_DP_NONE,
137 	NOUVEAU_DP_SST,
138 	NOUVEAU_DP_MST,
139 };
140 
141 int nouveau_dp_detect(struct nouveau_connector *, struct nouveau_encoder *);
142 void nouveau_dp_irq(struct nouveau_drm *drm,
143 		    struct nouveau_connector *nv_connector);
144 enum drm_mode_status nv50_dp_mode_valid(struct drm_connector *,
145 					struct nouveau_encoder *,
146 					const struct drm_display_mode *,
147 					unsigned *clock);
148 
149 struct nouveau_connector *
150 nv50_outp_get_new_connector(struct drm_atomic_state *state, struct nouveau_encoder *outp);
151 struct nouveau_connector *
152 nv50_outp_get_old_connector(struct drm_atomic_state *state, struct nouveau_encoder *outp);
153 
154 int nv50_mstm_detect(struct nouveau_encoder *encoder);
155 void nv50_mstm_remove(struct nv50_mstm *mstm);
156 bool nv50_mstm_service(struct nouveau_drm *drm,
157 		       struct nouveau_connector *nv_connector,
158 		       struct nv50_mstm *mstm);
159 #endif /* __NOUVEAU_ENCODER_H__ */
160