Commit | Line | Data |
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14b6873a AH |
1 | /* |
2 | * Exynos DRM Parallel output support. | |
3 | * | |
4 | * Copyright (c) 2014 Samsung Electronics Co., Ltd | |
5 | * | |
6 | * Contacts: Andrzej Hajda <a.hajda@samsung.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 version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <drm/drmP.h> | |
14 | #include <drm/drm_crtc_helper.h> | |
15 | #include <drm/drm_panel.h> | |
4ea9526b | 16 | #include <drm/drm_atomic_helper.h> |
14b6873a | 17 | |
fb38b1f6 | 18 | #include <linux/of_graph.h> |
14b6873a AH |
19 | #include <linux/regulator/consumer.h> |
20 | ||
21 | #include <video/of_videomode.h> | |
22 | #include <video/videomode.h> | |
23 | ||
a2986e80 | 24 | #include "exynos_drm_crtc.h" |
14b6873a AH |
25 | |
26 | struct exynos_dpi { | |
2b8376c8 | 27 | struct drm_encoder encoder; |
14b6873a AH |
28 | struct device *dev; |
29 | struct device_node *panel_node; | |
30 | ||
31 | struct drm_panel *panel; | |
32 | struct drm_connector connector; | |
14b6873a AH |
33 | |
34 | struct videomode *vm; | |
14b6873a AH |
35 | }; |
36 | ||
37 | #define connector_to_dpi(c) container_of(c, struct exynos_dpi, connector) | |
38 | ||
2b8376c8 | 39 | static inline struct exynos_dpi *encoder_to_dpi(struct drm_encoder *e) |
4cfde1f2 | 40 | { |
cf67cc9a | 41 | return container_of(e, struct exynos_dpi, encoder); |
4cfde1f2 AH |
42 | } |
43 | ||
14b6873a AH |
44 | static enum drm_connector_status |
45 | exynos_dpi_detect(struct drm_connector *connector, bool force) | |
46 | { | |
47 | struct exynos_dpi *ctx = connector_to_dpi(connector); | |
48 | ||
aaa51b13 | 49 | if (ctx->panel && !ctx->panel->connector) |
000cc920 | 50 | drm_panel_attach(ctx->panel, &ctx->connector); |
14b6873a | 51 | |
000cc920 | 52 | return connector_status_connected; |
14b6873a AH |
53 | } |
54 | ||
55 | static void exynos_dpi_connector_destroy(struct drm_connector *connector) | |
56 | { | |
34ea3d38 | 57 | drm_connector_unregister(connector); |
14b6873a AH |
58 | drm_connector_cleanup(connector); |
59 | } | |
60 | ||
800ba2b5 | 61 | static const struct drm_connector_funcs exynos_dpi_connector_funcs = { |
63498e30 | 62 | .dpms = drm_atomic_helper_connector_dpms, |
14b6873a AH |
63 | .detect = exynos_dpi_detect, |
64 | .fill_modes = drm_helper_probe_single_connector_modes, | |
65 | .destroy = exynos_dpi_connector_destroy, | |
4ea9526b GP |
66 | .reset = drm_atomic_helper_connector_reset, |
67 | .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, | |
68 | .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, | |
14b6873a AH |
69 | }; |
70 | ||
71 | static int exynos_dpi_get_modes(struct drm_connector *connector) | |
72 | { | |
73 | struct exynos_dpi *ctx = connector_to_dpi(connector); | |
74 | ||
75 | /* fimd timings gets precedence over panel modes */ | |
76 | if (ctx->vm) { | |
77 | struct drm_display_mode *mode; | |
78 | ||
79 | mode = drm_mode_create(connector->dev); | |
80 | if (!mode) { | |
81 | DRM_ERROR("failed to create a new display mode\n"); | |
82 | return 0; | |
83 | } | |
84 | drm_display_mode_from_videomode(ctx->vm, mode); | |
85 | mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; | |
86 | drm_mode_probed_add(connector, mode); | |
87 | return 1; | |
88 | } | |
89 | ||
90 | if (ctx->panel) | |
91 | return ctx->panel->funcs->get_modes(ctx->panel); | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
14b6873a AH |
96 | static struct drm_encoder * |
97 | exynos_dpi_best_encoder(struct drm_connector *connector) | |
98 | { | |
99 | struct exynos_dpi *ctx = connector_to_dpi(connector); | |
100 | ||
2b8376c8 | 101 | return &ctx->encoder; |
14b6873a AH |
102 | } |
103 | ||
800ba2b5 | 104 | static const struct drm_connector_helper_funcs exynos_dpi_connector_helper_funcs = { |
14b6873a | 105 | .get_modes = exynos_dpi_get_modes, |
14b6873a AH |
106 | .best_encoder = exynos_dpi_best_encoder, |
107 | }; | |
108 | ||
2b8376c8 | 109 | static int exynos_dpi_create_connector(struct drm_encoder *encoder) |
14b6873a | 110 | { |
2b8376c8 | 111 | struct exynos_dpi *ctx = encoder_to_dpi(encoder); |
14b6873a AH |
112 | struct drm_connector *connector = &ctx->connector; |
113 | int ret; | |
114 | ||
ae08fe6c | 115 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
14b6873a AH |
116 | |
117 | ret = drm_connector_init(encoder->dev, connector, | |
118 | &exynos_dpi_connector_funcs, | |
119 | DRM_MODE_CONNECTOR_VGA); | |
120 | if (ret) { | |
121 | DRM_ERROR("failed to initialize connector with drm\n"); | |
122 | return ret; | |
123 | } | |
124 | ||
125 | drm_connector_helper_add(connector, &exynos_dpi_connector_helper_funcs); | |
34ea3d38 | 126 | drm_connector_register(connector); |
14b6873a AH |
127 | drm_mode_connector_attach_encoder(connector, encoder); |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
2b8376c8 GP |
132 | static void exynos_dpi_mode_set(struct drm_encoder *encoder, |
133 | struct drm_display_mode *mode, | |
134 | struct drm_display_mode *adjusted_mode) | |
135 | { | |
136 | } | |
137 | ||
138 | static void exynos_dpi_enable(struct drm_encoder *encoder) | |
14b6873a | 139 | { |
cf67cc9a | 140 | struct exynos_dpi *ctx = encoder_to_dpi(encoder); |
b6595dc7 | 141 | |
39bbde9c AK |
142 | if (ctx->panel) { |
143 | drm_panel_prepare(ctx->panel); | |
14b6873a | 144 | drm_panel_enable(ctx->panel); |
39bbde9c | 145 | } |
14b6873a AH |
146 | } |
147 | ||
2b8376c8 | 148 | static void exynos_dpi_disable(struct drm_encoder *encoder) |
14b6873a | 149 | { |
cf67cc9a | 150 | struct exynos_dpi *ctx = encoder_to_dpi(encoder); |
b6595dc7 | 151 | |
39bbde9c | 152 | if (ctx->panel) { |
14b6873a | 153 | drm_panel_disable(ctx->panel); |
39bbde9c AK |
154 | drm_panel_unprepare(ctx->panel); |
155 | } | |
14b6873a AH |
156 | } |
157 | ||
800ba2b5 | 158 | static const struct drm_encoder_helper_funcs exynos_dpi_encoder_helper_funcs = { |
2b8376c8 | 159 | .mode_set = exynos_dpi_mode_set, |
b6595dc7 GP |
160 | .enable = exynos_dpi_enable, |
161 | .disable = exynos_dpi_disable, | |
14b6873a AH |
162 | }; |
163 | ||
800ba2b5 | 164 | static const struct drm_encoder_funcs exynos_dpi_encoder_funcs = { |
2b8376c8 GP |
165 | .destroy = drm_encoder_cleanup, |
166 | }; | |
167 | ||
14b6873a AH |
168 | enum { |
169 | FIMD_PORT_IN0, | |
170 | FIMD_PORT_IN1, | |
171 | FIMD_PORT_IN2, | |
172 | FIMD_PORT_RGB, | |
173 | FIMD_PORT_WRB, | |
174 | }; | |
175 | ||
f46ed1ab | 176 | static struct device_node *exynos_dpi_of_find_panel_node(struct device *dev) |
14b6873a AH |
177 | { |
178 | struct device_node *np, *ep; | |
179 | ||
fb38b1f6 | 180 | ep = of_graph_get_endpoint_by_regs(dev->of_node, FIMD_PORT_RGB, 0); |
14b6873a AH |
181 | if (!ep) |
182 | return NULL; | |
183 | ||
184 | np = of_graph_get_remote_port_parent(ep); | |
185 | of_node_put(ep); | |
186 | ||
187 | return np; | |
188 | } | |
189 | ||
190 | static int exynos_dpi_parse_dt(struct exynos_dpi *ctx) | |
191 | { | |
192 | struct device *dev = ctx->dev; | |
193 | struct device_node *dn = dev->of_node; | |
194 | struct device_node *np; | |
195 | ||
196 | ctx->panel_node = exynos_dpi_of_find_panel_node(dev); | |
197 | ||
198 | np = of_get_child_by_name(dn, "display-timings"); | |
199 | if (np) { | |
200 | struct videomode *vm; | |
201 | int ret; | |
202 | ||
203 | of_node_put(np); | |
204 | ||
205 | vm = devm_kzalloc(dev, sizeof(*ctx->vm), GFP_KERNEL); | |
206 | if (!vm) | |
207 | return -ENOMEM; | |
208 | ||
209 | ret = of_get_videomode(dn, vm, 0); | |
000cc920 AH |
210 | if (ret < 0) { |
211 | devm_kfree(dev, vm); | |
14b6873a | 212 | return ret; |
000cc920 | 213 | } |
14b6873a AH |
214 | |
215 | ctx->vm = vm; | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
220 | if (!ctx->panel_node) | |
221 | return -EINVAL; | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
2b8376c8 | 226 | int exynos_dpi_bind(struct drm_device *dev, struct drm_encoder *encoder) |
a2986e80 GP |
227 | { |
228 | int ret; | |
229 | ||
2b8376c8 GP |
230 | ret = exynos_drm_crtc_get_pipe_from_type(dev, EXYNOS_DISPLAY_TYPE_LCD); |
231 | if (ret < 0) | |
a2986e80 | 232 | return ret; |
a2986e80 | 233 | |
2b8376c8 GP |
234 | encoder->possible_crtcs = 1 << ret; |
235 | ||
236 | DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); | |
237 | ||
238 | drm_encoder_init(dev, encoder, &exynos_dpi_encoder_funcs, | |
13a3d91f | 239 | DRM_MODE_ENCODER_TMDS, NULL); |
2b8376c8 GP |
240 | |
241 | drm_encoder_helper_add(encoder, &exynos_dpi_encoder_helper_funcs); | |
242 | ||
243 | ret = exynos_dpi_create_connector(encoder); | |
a2986e80 GP |
244 | if (ret) { |
245 | DRM_ERROR("failed to create connector ret = %d\n", ret); | |
2b8376c8 | 246 | drm_encoder_cleanup(encoder); |
a2986e80 GP |
247 | return ret; |
248 | } | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
2b8376c8 | 253 | struct drm_encoder *exynos_dpi_probe(struct device *dev) |
14b6873a AH |
254 | { |
255 | struct exynos_dpi *ctx; | |
256 | int ret; | |
257 | ||
258 | ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); | |
259 | if (!ctx) | |
4cfde1f2 | 260 | return ERR_PTR(-ENOMEM); |
14b6873a AH |
261 | |
262 | ctx->dev = dev; | |
14b6873a AH |
263 | |
264 | ret = exynos_dpi_parse_dt(ctx); | |
000cc920 AH |
265 | if (ret < 0) { |
266 | devm_kfree(dev, ctx); | |
86650408 | 267 | return NULL; |
000cc920 AH |
268 | } |
269 | ||
270 | if (ctx->panel_node) { | |
271 | ctx->panel = of_drm_find_panel(ctx->panel_node); | |
86650408 | 272 | if (!ctx->panel) |
000cc920 AH |
273 | return ERR_PTR(-EPROBE_DEFER); |
274 | } | |
14b6873a | 275 | |
cf67cc9a | 276 | return &ctx->encoder; |
14b6873a AH |
277 | } |
278 | ||
2b8376c8 | 279 | int exynos_dpi_remove(struct drm_encoder *encoder) |
14b6873a | 280 | { |
cf67cc9a | 281 | struct exynos_dpi *ctx = encoder_to_dpi(encoder); |
f37cd5e8 | 282 | |
cf67cc9a | 283 | exynos_dpi_disable(&ctx->encoder); |
90eac897 | 284 | |
90eac897 AH |
285 | if (ctx->panel) |
286 | drm_panel_detach(ctx->panel); | |
14b6873a AH |
287 | |
288 | return 0; | |
289 | } |