Commit | Line | Data |
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637e6194 LP |
1 | /* |
2 | * R-Car Display Unit HDMI Encoder | |
3 | * | |
4 | * Copyright (C) 2014 Renesas Electronics Corporation | |
5 | * | |
6 | * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/slab.h> | |
15 | ||
16 | #include <drm/drmP.h> | |
17 | #include <drm/drm_crtc.h> | |
18 | #include <drm/drm_crtc_helper.h> | |
19 | #include <drm/drm_encoder_slave.h> | |
20 | ||
21 | #include "rcar_du_drv.h" | |
22 | #include "rcar_du_encoder.h" | |
23 | #include "rcar_du_hdmienc.h" | |
24 | ||
25 | struct rcar_du_hdmienc { | |
26 | struct rcar_du_encoder *renc; | |
27 | struct device *dev; | |
28 | int dpms; | |
29 | }; | |
30 | ||
31 | #define to_rcar_hdmienc(e) (to_rcar_encoder(e)->hdmi) | |
32 | #define to_slave_funcs(e) (to_rcar_encoder(e)->slave.slave_funcs) | |
33 | ||
34 | static void rcar_du_hdmienc_dpms(struct drm_encoder *encoder, int mode) | |
35 | { | |
36 | struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder); | |
37 | struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder); | |
38 | ||
39 | if (hdmienc->dpms == mode) | |
40 | return; | |
41 | ||
42 | if (sfuncs->dpms) | |
43 | sfuncs->dpms(encoder, mode); | |
44 | ||
45 | hdmienc->dpms = mode; | |
46 | } | |
47 | ||
48 | static bool rcar_du_hdmienc_mode_fixup(struct drm_encoder *encoder, | |
49 | const struct drm_display_mode *mode, | |
50 | struct drm_display_mode *adjusted_mode) | |
51 | { | |
52 | struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder); | |
53 | ||
54 | if (sfuncs->mode_fixup == NULL) | |
55 | return true; | |
56 | ||
57 | return sfuncs->mode_fixup(encoder, mode, adjusted_mode); | |
58 | } | |
59 | ||
60 | static void rcar_du_hdmienc_mode_prepare(struct drm_encoder *encoder) | |
61 | { | |
62 | rcar_du_hdmienc_dpms(encoder, DRM_MODE_DPMS_OFF); | |
63 | } | |
64 | ||
65 | static void rcar_du_hdmienc_mode_commit(struct drm_encoder *encoder) | |
66 | { | |
67 | rcar_du_hdmienc_dpms(encoder, DRM_MODE_DPMS_ON); | |
68 | } | |
69 | ||
70 | static void rcar_du_hdmienc_mode_set(struct drm_encoder *encoder, | |
71 | struct drm_display_mode *mode, | |
72 | struct drm_display_mode *adjusted_mode) | |
73 | { | |
74 | struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder); | |
75 | struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder); | |
76 | ||
77 | if (sfuncs->mode_set) | |
78 | sfuncs->mode_set(encoder, mode, adjusted_mode); | |
79 | ||
80 | rcar_du_crtc_route_output(encoder->crtc, hdmienc->renc->output); | |
81 | } | |
82 | ||
83 | static const struct drm_encoder_helper_funcs encoder_helper_funcs = { | |
84 | .dpms = rcar_du_hdmienc_dpms, | |
85 | .mode_fixup = rcar_du_hdmienc_mode_fixup, | |
86 | .prepare = rcar_du_hdmienc_mode_prepare, | |
87 | .commit = rcar_du_hdmienc_mode_commit, | |
88 | .mode_set = rcar_du_hdmienc_mode_set, | |
89 | }; | |
90 | ||
91 | static void rcar_du_hdmienc_cleanup(struct drm_encoder *encoder) | |
92 | { | |
93 | struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder); | |
94 | ||
95 | rcar_du_hdmienc_dpms(encoder, DRM_MODE_DPMS_OFF); | |
96 | ||
97 | drm_encoder_cleanup(encoder); | |
98 | put_device(hdmienc->dev); | |
99 | } | |
100 | ||
101 | static const struct drm_encoder_funcs encoder_funcs = { | |
102 | .destroy = rcar_du_hdmienc_cleanup, | |
103 | }; | |
104 | ||
105 | int rcar_du_hdmienc_init(struct rcar_du_device *rcdu, | |
106 | struct rcar_du_encoder *renc, struct device_node *np) | |
107 | { | |
108 | struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc); | |
109 | struct drm_i2c_encoder_driver *driver; | |
110 | struct i2c_client *i2c_slave; | |
111 | struct rcar_du_hdmienc *hdmienc; | |
112 | int ret; | |
113 | ||
114 | hdmienc = devm_kzalloc(rcdu->dev, sizeof(*hdmienc), GFP_KERNEL); | |
115 | if (hdmienc == NULL) | |
116 | return -ENOMEM; | |
117 | ||
118 | /* Locate the slave I2C device and driver. */ | |
119 | i2c_slave = of_find_i2c_device_by_node(np); | |
120 | if (!i2c_slave || !i2c_get_clientdata(i2c_slave)) | |
121 | return -EPROBE_DEFER; | |
122 | ||
123 | hdmienc->dev = &i2c_slave->dev; | |
124 | ||
125 | if (hdmienc->dev->driver == NULL) { | |
126 | ret = -EPROBE_DEFER; | |
127 | goto error; | |
128 | } | |
129 | ||
130 | /* Initialize the slave encoder. */ | |
131 | driver = to_drm_i2c_encoder_driver(to_i2c_driver(hdmienc->dev->driver)); | |
132 | ret = driver->encoder_init(i2c_slave, rcdu->ddev, &renc->slave); | |
133 | if (ret < 0) | |
134 | goto error; | |
135 | ||
136 | ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs, | |
137 | DRM_MODE_ENCODER_TMDS); | |
138 | if (ret < 0) | |
139 | goto error; | |
140 | ||
141 | drm_encoder_helper_add(encoder, &encoder_helper_funcs); | |
142 | ||
143 | renc->hdmi = hdmienc; | |
144 | hdmienc->renc = renc; | |
145 | ||
146 | return 0; | |
147 | ||
148 | error: | |
149 | put_device(hdmienc->dev); | |
150 | return ret; | |
151 | } |