Commit | Line | Data |
---|---|---|
4bf8e196 | 1 | /* |
6978f123 | 2 | * rcar_du_encoder.c -- R-Car Display Unit Encoder |
4bf8e196 | 3 | * |
36d50464 | 4 | * Copyright (C) 2013-2014 Renesas Electronics Corporation |
4bf8e196 LP |
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 | ||
90374b5c LP |
14 | #include <linux/export.h> |
15 | ||
4bf8e196 LP |
16 | #include <drm/drmP.h> |
17 | #include <drm/drm_crtc.h> | |
18 | #include <drm/drm_crtc_helper.h> | |
19 | ||
20 | #include "rcar_du_drv.h" | |
6978f123 | 21 | #include "rcar_du_encoder.h" |
637e6194 LP |
22 | #include "rcar_du_hdmicon.h" |
23 | #include "rcar_du_hdmienc.h" | |
4bf8e196 | 24 | #include "rcar_du_kms.h" |
56c5dd00 | 25 | #include "rcar_du_lvdscon.h" |
90374b5c | 26 | #include "rcar_du_lvdsenc.h" |
6978f123 | 27 | #include "rcar_du_vgacon.h" |
4bf8e196 | 28 | |
6978f123 LP |
29 | /* ----------------------------------------------------------------------------- |
30 | * Common connector functions | |
31 | */ | |
32 | ||
33 | struct drm_encoder * | |
34 | rcar_du_connector_best_encoder(struct drm_connector *connector) | |
4bf8e196 | 35 | { |
6978f123 LP |
36 | struct rcar_du_connector *rcon = to_rcar_connector(connector); |
37 | ||
4b96b70c | 38 | return rcar_encoder_to_drm_encoder(rcon->encoder); |
4bf8e196 LP |
39 | } |
40 | ||
6978f123 LP |
41 | /* ----------------------------------------------------------------------------- |
42 | * Encoder | |
43 | */ | |
44 | ||
45 | static void rcar_du_encoder_dpms(struct drm_encoder *encoder, int mode) | |
46 | { | |
90374b5c LP |
47 | struct rcar_du_encoder *renc = to_rcar_encoder(encoder); |
48 | ||
49 | if (renc->lvds) | |
50 | rcar_du_lvdsenc_dpms(renc->lvds, encoder->crtc, mode); | |
6978f123 LP |
51 | } |
52 | ||
53 | static bool rcar_du_encoder_mode_fixup(struct drm_encoder *encoder, | |
54 | const struct drm_display_mode *mode, | |
55 | struct drm_display_mode *adjusted_mode) | |
4bf8e196 | 56 | { |
90374b5c | 57 | struct rcar_du_encoder *renc = to_rcar_encoder(encoder); |
4bf8e196 LP |
58 | const struct drm_display_mode *panel_mode; |
59 | struct drm_device *dev = encoder->dev; | |
60 | struct drm_connector *connector; | |
61 | bool found = false; | |
62 | ||
6978f123 LP |
63 | /* DAC encoders have currently no restriction on the mode. */ |
64 | if (encoder->encoder_type == DRM_MODE_ENCODER_DAC) | |
65 | return true; | |
66 | ||
4bf8e196 LP |
67 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
68 | if (connector->encoder == encoder) { | |
69 | found = true; | |
70 | break; | |
71 | } | |
72 | } | |
73 | ||
74 | if (!found) { | |
75 | dev_dbg(dev->dev, "mode_fixup: no connector found\n"); | |
76 | return false; | |
77 | } | |
78 | ||
79 | if (list_empty(&connector->modes)) { | |
80 | dev_dbg(dev->dev, "mode_fixup: empty modes list\n"); | |
81 | return false; | |
82 | } | |
83 | ||
84 | panel_mode = list_first_entry(&connector->modes, | |
85 | struct drm_display_mode, head); | |
86 | ||
87 | /* We're not allowed to modify the resolution. */ | |
88 | if (mode->hdisplay != panel_mode->hdisplay || | |
89 | mode->vdisplay != panel_mode->vdisplay) | |
90 | return false; | |
91 | ||
92 | /* The flat panel mode is fixed, just copy it to the adjusted mode. */ | |
93 | drm_mode_copy(adjusted_mode, panel_mode); | |
94 | ||
90374b5c LP |
95 | /* The internal LVDS encoder has a clock frequency operating range of |
96 | * 30MHz to 150MHz. Clamp the clock accordingly. | |
97 | */ | |
98 | if (renc->lvds) | |
99 | adjusted_mode->clock = clamp(adjusted_mode->clock, | |
100 | 30000, 150000); | |
101 | ||
4bf8e196 LP |
102 | return true; |
103 | } | |
104 | ||
6978f123 LP |
105 | static void rcar_du_encoder_mode_prepare(struct drm_encoder *encoder) |
106 | { | |
90374b5c LP |
107 | struct rcar_du_encoder *renc = to_rcar_encoder(encoder); |
108 | ||
109 | if (renc->lvds) | |
110 | rcar_du_lvdsenc_dpms(renc->lvds, encoder->crtc, | |
111 | DRM_MODE_DPMS_OFF); | |
6978f123 LP |
112 | } |
113 | ||
114 | static void rcar_du_encoder_mode_commit(struct drm_encoder *encoder) | |
115 | { | |
90374b5c LP |
116 | struct rcar_du_encoder *renc = to_rcar_encoder(encoder); |
117 | ||
118 | if (renc->lvds) | |
119 | rcar_du_lvdsenc_dpms(renc->lvds, encoder->crtc, | |
120 | DRM_MODE_DPMS_ON); | |
6978f123 LP |
121 | } |
122 | ||
123 | static void rcar_du_encoder_mode_set(struct drm_encoder *encoder, | |
124 | struct drm_display_mode *mode, | |
125 | struct drm_display_mode *adjusted_mode) | |
126 | { | |
127 | struct rcar_du_encoder *renc = to_rcar_encoder(encoder); | |
128 | ||
129 | rcar_du_crtc_route_output(encoder->crtc, renc->output); | |
130 | } | |
131 | ||
4bf8e196 | 132 | static const struct drm_encoder_helper_funcs encoder_helper_funcs = { |
6978f123 LP |
133 | .dpms = rcar_du_encoder_dpms, |
134 | .mode_fixup = rcar_du_encoder_mode_fixup, | |
4bf8e196 LP |
135 | .prepare = rcar_du_encoder_mode_prepare, |
136 | .commit = rcar_du_encoder_mode_commit, | |
137 | .mode_set = rcar_du_encoder_mode_set, | |
138 | }; | |
139 | ||
140 | static const struct drm_encoder_funcs encoder_funcs = { | |
141 | .destroy = drm_encoder_cleanup, | |
142 | }; | |
143 | ||
6978f123 | 144 | int rcar_du_encoder_init(struct rcar_du_device *rcdu, |
ef67a902 LP |
145 | enum rcar_du_encoder_type type, |
146 | enum rcar_du_output output, | |
3ea4d5ec LP |
147 | struct device_node *enc_node, |
148 | struct device_node *con_node) | |
4bf8e196 LP |
149 | { |
150 | struct rcar_du_encoder *renc; | |
4b96b70c | 151 | struct drm_encoder *encoder; |
ef67a902 | 152 | unsigned int encoder_type; |
4bf8e196 LP |
153 | int ret; |
154 | ||
155 | renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL); | |
156 | if (renc == NULL) | |
157 | return -ENOMEM; | |
158 | ||
159 | renc->output = output; | |
4b96b70c | 160 | encoder = rcar_encoder_to_drm_encoder(renc); |
4bf8e196 | 161 | |
90374b5c LP |
162 | switch (output) { |
163 | case RCAR_DU_OUTPUT_LVDS0: | |
164 | renc->lvds = rcdu->lvds[0]; | |
165 | break; | |
166 | ||
167 | case RCAR_DU_OUTPUT_LVDS1: | |
168 | renc->lvds = rcdu->lvds[1]; | |
169 | break; | |
170 | ||
171 | default: | |
172 | break; | |
173 | } | |
174 | ||
ef67a902 LP |
175 | switch (type) { |
176 | case RCAR_DU_ENCODER_VGA: | |
177 | encoder_type = DRM_MODE_ENCODER_DAC; | |
178 | break; | |
179 | case RCAR_DU_ENCODER_LVDS: | |
180 | encoder_type = DRM_MODE_ENCODER_LVDS; | |
181 | break; | |
637e6194 LP |
182 | case RCAR_DU_ENCODER_HDMI: |
183 | encoder_type = DRM_MODE_ENCODER_TMDS; | |
184 | break; | |
ef67a902 LP |
185 | case RCAR_DU_ENCODER_NONE: |
186 | default: | |
187 | /* No external encoder, use the internal encoder type. */ | |
188 | encoder_type = rcdu->info->routes[output].encoder_type; | |
189 | break; | |
190 | } | |
191 | ||
637e6194 LP |
192 | if (type == RCAR_DU_ENCODER_HDMI) { |
193 | if (renc->lvds) { | |
194 | dev_err(rcdu->dev, | |
195 | "Chaining LVDS and HDMI encoders not supported\n"); | |
196 | return -EINVAL; | |
197 | } | |
4bf8e196 | 198 | |
637e6194 LP |
199 | ret = rcar_du_hdmienc_init(rcdu, renc, enc_node); |
200 | if (ret < 0) | |
201 | return ret; | |
202 | } else { | |
203 | ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs, | |
204 | encoder_type); | |
205 | if (ret < 0) | |
206 | return ret; | |
207 | ||
208 | drm_encoder_helper_add(encoder, &encoder_helper_funcs); | |
209 | } | |
4bf8e196 | 210 | |
ef67a902 | 211 | switch (encoder_type) { |
2378ad12 | 212 | case DRM_MODE_ENCODER_LVDS: |
3ea4d5ec | 213 | return rcar_du_lvds_connector_init(rcdu, renc, con_node); |
6978f123 | 214 | |
ef67a902 | 215 | case DRM_MODE_ENCODER_DAC: |
6978f123 LP |
216 | return rcar_du_vga_connector_init(rcdu, renc); |
217 | ||
637e6194 LP |
218 | case DRM_MODE_ENCODER_TMDS: |
219 | return rcar_du_hdmi_connector_init(rcdu, renc); | |
220 | ||
6978f123 LP |
221 | default: |
222 | return -EINVAL; | |
223 | } | |
4bf8e196 | 224 | } |