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 
52 	struct i2c_adapter *i2c;
53 	struct nvkm_i2c_aux *aux;
54 
55 	/* different to drm_encoder.crtc, this reflects what's
56 	 * actually programmed on the hw, not the proposed crtc */
57 	struct drm_crtc *crtc;
58 	u32 ctrl;
59 
60 	/* Protected by nouveau_drm.audio.lock */
61 	struct {
62 		bool enabled;
63 		struct drm_connector *connector;
64 	} audio;
65 
66 	struct drm_display_mode mode;
67 	int last_dpms;
68 
69 	struct nv04_output_reg restore;
70 
71 	union {
72 		struct {
73 			struct nv50_mstm *mstm;
74 			int link_nr;
75 			int link_bw;
76 
77 			/* Protects DP state that needs to be accessed outside
78 			 * connector reprobing contexts
79 			 */
80 			struct mutex hpd_irq_lock;
81 
82 			u8 dpcd[DP_RECEIVER_CAP_SIZE];
83 			u8 downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
84 			struct drm_dp_desc desc;
85 
86 			u8 sink_count;
87 		} dp;
88 	};
89 
90 	struct {
91 		bool dp_interlace : 1;
92 	} caps;
93 
94 	void (*enc_save)(struct drm_encoder *encoder);
95 	void (*enc_restore)(struct drm_encoder *encoder);
96 	void (*update)(struct nouveau_encoder *, u8 head,
97 		       struct nv50_head_atom *, u8 proto, u8 depth);
98 };
99 
100 struct nv50_mstm {
101 	struct nouveau_encoder *outp;
102 
103 	struct drm_dp_mst_topology_mgr mgr;
104 
105 	/* Protected under nouveau_encoder->dp.hpd_irq_lock */
106 	bool can_mst;
107 	bool is_mst;
108 	bool suspended;
109 
110 	bool modified;
111 	bool disabled;
112 	int links;
113 };
114 
115 struct nouveau_encoder *
116 find_encoder(struct drm_connector *connector, int type);
117 
118 static inline struct nouveau_encoder *nouveau_encoder(struct drm_encoder *enc)
119 {
120 	struct drm_encoder_slave *slave = to_encoder_slave(enc);
121 
122 	return container_of(slave, struct nouveau_encoder, base);
123 }
124 
125 static inline struct drm_encoder *to_drm_encoder(struct nouveau_encoder *enc)
126 {
127 	return &enc->base.base;
128 }
129 
130 static inline const struct drm_encoder_slave_funcs *
131 get_slave_funcs(struct drm_encoder *enc)
132 {
133 	return to_encoder_slave(enc)->slave_funcs;
134 }
135 
136 /* nouveau_dp.c */
137 enum nouveau_dp_status {
138 	NOUVEAU_DP_NONE,
139 	NOUVEAU_DP_SST,
140 	NOUVEAU_DP_MST,
141 };
142 
143 int nouveau_dp_detect(struct nouveau_connector *, struct nouveau_encoder *);
144 bool nouveau_dp_link_check(struct nouveau_connector *);
145 void nouveau_dp_irq(struct work_struct *);
146 enum drm_mode_status nv50_dp_mode_valid(struct drm_connector *,
147 					struct nouveau_encoder *,
148 					const struct drm_display_mode *,
149 					unsigned *clock);
150 
151 struct nouveau_connector *
152 nv50_outp_get_new_connector(struct drm_atomic_state *state, struct nouveau_encoder *outp);
153 struct nouveau_connector *
154 nv50_outp_get_old_connector(struct drm_atomic_state *state, struct nouveau_encoder *outp);
155 
156 int nv50_mstm_detect(struct nouveau_encoder *encoder);
157 void nv50_mstm_remove(struct nv50_mstm *mstm);
158 bool nv50_mstm_service(struct nouveau_drm *drm,
159 		       struct nouveau_connector *nv_connector,
160 		       struct nv50_mstm *mstm);
161 #endif /* __NOUVEAU_ENCODER_H__ */
162