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Thomas Gleixnerd2912cb2019-06-04 10:11:33 +02001// SPDX-License-Identifier: GPL-2.0-only
Andrzej Hajda14b68732014-03-17 13:03:56 +01002/*
3 * Exynos DRM Parallel output support.
4 *
5 * Copyright (c) 2014 Samsung Electronics Co., Ltd
6 *
7 * Contacts: Andrzej Hajda <a.hajda@samsung.com>
Andrzej Hajda14b68732014-03-17 13:03:56 +01008*/
9
10#include <drm/drmP.h>
Gustavo Padovan4ea95262015-06-01 12:04:44 -030011#include <drm/drm_atomic_helper.h>
Daniel Vetterfcd70cd2019-01-17 22:03:34 +010012#include <drm/drm_panel.h>
13#include <drm/drm_probe_helper.h>
Andrzej Hajda14b68732014-03-17 13:03:56 +010014
Philipp Zabelfb38b1f2016-05-03 15:47:24 +020015#include <linux/of_graph.h>
Andrzej Hajda14b68732014-03-17 13:03:56 +010016#include <linux/regulator/consumer.h>
17
18#include <video/of_videomode.h>
19#include <video/videomode.h>
20
Gustavo Padovana2986e82015-08-05 20:24:20 -030021#include "exynos_drm_crtc.h"
Andrzej Hajda14b68732014-03-17 13:03:56 +010022
23struct exynos_dpi {
Gustavo Padovan2b8376c2015-08-15 12:14:08 -030024 struct drm_encoder encoder;
Andrzej Hajda14b68732014-03-17 13:03:56 +010025 struct device *dev;
26 struct device_node *panel_node;
27
28 struct drm_panel *panel;
29 struct drm_connector connector;
Andrzej Hajda14b68732014-03-17 13:03:56 +010030
31 struct videomode *vm;
Andrzej Hajda14b68732014-03-17 13:03:56 +010032};
33
34#define connector_to_dpi(c) container_of(c, struct exynos_dpi, connector)
35
Gustavo Padovan2b8376c2015-08-15 12:14:08 -030036static inline struct exynos_dpi *encoder_to_dpi(struct drm_encoder *e)
Andrzej Hajda4cfde1f2014-11-17 09:54:26 +010037{
Gustavo Padovancf67cc92015-08-11 17:38:06 +090038 return container_of(e, struct exynos_dpi, encoder);
Andrzej Hajda4cfde1f2014-11-17 09:54:26 +010039}
40
Andrzej Hajda14b68732014-03-17 13:03:56 +010041static enum drm_connector_status
42exynos_dpi_detect(struct drm_connector *connector, bool force)
43{
44 struct exynos_dpi *ctx = connector_to_dpi(connector);
45
Tomasz Figaaaa51b12014-06-10 22:57:57 +020046 if (ctx->panel && !ctx->panel->connector)
Andrzej Hajda000cc922014-04-03 16:26:00 +020047 drm_panel_attach(ctx->panel, &ctx->connector);
Andrzej Hajda14b68732014-03-17 13:03:56 +010048
Andrzej Hajda000cc922014-04-03 16:26:00 +020049 return connector_status_connected;
Andrzej Hajda14b68732014-03-17 13:03:56 +010050}
51
52static void exynos_dpi_connector_destroy(struct drm_connector *connector)
53{
Thomas Wood34ea3d32014-05-29 16:57:41 +010054 drm_connector_unregister(connector);
Andrzej Hajda14b68732014-03-17 13:03:56 +010055 drm_connector_cleanup(connector);
56}
57
Ville Syrjälä800ba2b2015-12-15 12:21:06 +010058static const struct drm_connector_funcs exynos_dpi_connector_funcs = {
Andrzej Hajda14b68732014-03-17 13:03:56 +010059 .detect = exynos_dpi_detect,
60 .fill_modes = drm_helper_probe_single_connector_modes,
61 .destroy = exynos_dpi_connector_destroy,
Gustavo Padovan4ea95262015-06-01 12:04:44 -030062 .reset = drm_atomic_helper_connector_reset,
63 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
64 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
Andrzej Hajda14b68732014-03-17 13:03:56 +010065};
66
67static int exynos_dpi_get_modes(struct drm_connector *connector)
68{
69 struct exynos_dpi *ctx = connector_to_dpi(connector);
70
71 /* fimd timings gets precedence over panel modes */
72 if (ctx->vm) {
73 struct drm_display_mode *mode;
74
75 mode = drm_mode_create(connector->dev);
76 if (!mode) {
Inki Dae6f83d202019-04-15 14:24:36 +090077 DRM_DEV_ERROR(ctx->dev,
78 "failed to create a new display mode\n");
Andrzej Hajda14b68732014-03-17 13:03:56 +010079 return 0;
80 }
81 drm_display_mode_from_videomode(ctx->vm, mode);
82 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
83 drm_mode_probed_add(connector, mode);
84 return 1;
85 }
86
87 if (ctx->panel)
88 return ctx->panel->funcs->get_modes(ctx->panel);
89
90 return 0;
91}
92
Ville Syrjälä800ba2b2015-12-15 12:21:06 +010093static const struct drm_connector_helper_funcs exynos_dpi_connector_helper_funcs = {
Andrzej Hajda14b68732014-03-17 13:03:56 +010094 .get_modes = exynos_dpi_get_modes,
Andrzej Hajda14b68732014-03-17 13:03:56 +010095};
96
Gustavo Padovan2b8376c2015-08-15 12:14:08 -030097static int exynos_dpi_create_connector(struct drm_encoder *encoder)
Andrzej Hajda14b68732014-03-17 13:03:56 +010098{
Gustavo Padovan2b8376c2015-08-15 12:14:08 -030099 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
Andrzej Hajda14b68732014-03-17 13:03:56 +0100100 struct drm_connector *connector = &ctx->connector;
101 int ret;
102
Inki Daeae08fe62014-04-01 19:45:28 +0900103 connector->polled = DRM_CONNECTOR_POLL_HPD;
Andrzej Hajda14b68732014-03-17 13:03:56 +0100104
105 ret = drm_connector_init(encoder->dev, connector,
106 &exynos_dpi_connector_funcs,
107 DRM_MODE_CONNECTOR_VGA);
108 if (ret) {
Inki Dae6f83d202019-04-15 14:24:36 +0900109 DRM_DEV_ERROR(ctx->dev,
110 "failed to initialize connector with drm\n");
Andrzej Hajda14b68732014-03-17 13:03:56 +0100111 return ret;
112 }
113
114 drm_connector_helper_add(connector, &exynos_dpi_connector_helper_funcs);
Daniel Vettercde4c442018-07-09 10:40:07 +0200115 drm_connector_attach_encoder(connector, encoder);
Andrzej Hajda14b68732014-03-17 13:03:56 +0100116
117 return 0;
118}
119
Gustavo Padovan2b8376c2015-08-15 12:14:08 -0300120static void exynos_dpi_mode_set(struct drm_encoder *encoder,
121 struct drm_display_mode *mode,
122 struct drm_display_mode *adjusted_mode)
123{
124}
125
126static void exynos_dpi_enable(struct drm_encoder *encoder)
Andrzej Hajda14b68732014-03-17 13:03:56 +0100127{
Gustavo Padovancf67cc92015-08-11 17:38:06 +0900128 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
Gustavo Padovanb6595dc2015-08-10 21:37:04 -0300129
Ajay Kumar39bbde92014-07-31 23:12:05 +0530130 if (ctx->panel) {
131 drm_panel_prepare(ctx->panel);
Andrzej Hajda14b68732014-03-17 13:03:56 +0100132 drm_panel_enable(ctx->panel);
Ajay Kumar39bbde92014-07-31 23:12:05 +0530133 }
Andrzej Hajda14b68732014-03-17 13:03:56 +0100134}
135
Gustavo Padovan2b8376c2015-08-15 12:14:08 -0300136static void exynos_dpi_disable(struct drm_encoder *encoder)
Andrzej Hajda14b68732014-03-17 13:03:56 +0100137{
Gustavo Padovancf67cc92015-08-11 17:38:06 +0900138 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
Gustavo Padovanb6595dc2015-08-10 21:37:04 -0300139
Ajay Kumar39bbde92014-07-31 23:12:05 +0530140 if (ctx->panel) {
Andrzej Hajda14b68732014-03-17 13:03:56 +0100141 drm_panel_disable(ctx->panel);
Ajay Kumar39bbde92014-07-31 23:12:05 +0530142 drm_panel_unprepare(ctx->panel);
143 }
Andrzej Hajda14b68732014-03-17 13:03:56 +0100144}
145
Ville Syrjälä800ba2b2015-12-15 12:21:06 +0100146static const struct drm_encoder_helper_funcs exynos_dpi_encoder_helper_funcs = {
Gustavo Padovan2b8376c2015-08-15 12:14:08 -0300147 .mode_set = exynos_dpi_mode_set,
Gustavo Padovanb6595dc2015-08-10 21:37:04 -0300148 .enable = exynos_dpi_enable,
149 .disable = exynos_dpi_disable,
Andrzej Hajda14b68732014-03-17 13:03:56 +0100150};
151
Ville Syrjälä800ba2b2015-12-15 12:21:06 +0100152static const struct drm_encoder_funcs exynos_dpi_encoder_funcs = {
Gustavo Padovan2b8376c2015-08-15 12:14:08 -0300153 .destroy = drm_encoder_cleanup,
154};
155
Andrzej Hajda14b68732014-03-17 13:03:56 +0100156enum {
157 FIMD_PORT_IN0,
158 FIMD_PORT_IN1,
159 FIMD_PORT_IN2,
160 FIMD_PORT_RGB,
161 FIMD_PORT_WRB,
162};
163
Andrzej Hajda14b68732014-03-17 13:03:56 +0100164static int exynos_dpi_parse_dt(struct exynos_dpi *ctx)
165{
166 struct device *dev = ctx->dev;
167 struct device_node *dn = dev->of_node;
168 struct device_node *np;
169
Rob Herring86418f92017-03-22 08:26:06 -0500170 ctx->panel_node = of_graph_get_remote_node(dn, FIMD_PORT_RGB, 0);
Andrzej Hajda14b68732014-03-17 13:03:56 +0100171
172 np = of_get_child_by_name(dn, "display-timings");
173 if (np) {
174 struct videomode *vm;
175 int ret;
176
177 of_node_put(np);
178
179 vm = devm_kzalloc(dev, sizeof(*ctx->vm), GFP_KERNEL);
180 if (!vm)
181 return -ENOMEM;
182
183 ret = of_get_videomode(dn, vm, 0);
Andrzej Hajda000cc922014-04-03 16:26:00 +0200184 if (ret < 0) {
185 devm_kfree(dev, vm);
Andrzej Hajda14b68732014-03-17 13:03:56 +0100186 return ret;
Andrzej Hajda000cc922014-04-03 16:26:00 +0200187 }
Andrzej Hajda14b68732014-03-17 13:03:56 +0100188
189 ctx->vm = vm;
190
191 return 0;
192 }
193
194 if (!ctx->panel_node)
195 return -EINVAL;
196
197 return 0;
198}
199
Gustavo Padovan2b8376c2015-08-15 12:14:08 -0300200int exynos_dpi_bind(struct drm_device *dev, struct drm_encoder *encoder)
Gustavo Padovana2986e82015-08-05 20:24:20 -0300201{
202 int ret;
203
Gustavo Padovan2b8376c2015-08-15 12:14:08 -0300204 drm_encoder_init(dev, encoder, &exynos_dpi_encoder_funcs,
Ville Syrjälä13a3d912015-12-09 16:20:18 +0200205 DRM_MODE_ENCODER_TMDS, NULL);
Gustavo Padovan2b8376c2015-08-15 12:14:08 -0300206
207 drm_encoder_helper_add(encoder, &exynos_dpi_encoder_helper_funcs);
208
Andrzej Hajda1ca582f2017-08-24 15:33:51 +0200209 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
210 if (ret < 0)
211 return ret;
212
Gustavo Padovan2b8376c2015-08-15 12:14:08 -0300213 ret = exynos_dpi_create_connector(encoder);
Gustavo Padovana2986e82015-08-05 20:24:20 -0300214 if (ret) {
Inki Dae6f83d202019-04-15 14:24:36 +0900215 DRM_DEV_ERROR(encoder_to_dpi(encoder)->dev,
216 "failed to create connector ret = %d\n", ret);
Gustavo Padovan2b8376c2015-08-15 12:14:08 -0300217 drm_encoder_cleanup(encoder);
Gustavo Padovana2986e82015-08-05 20:24:20 -0300218 return ret;
219 }
220
221 return 0;
222}
223
Gustavo Padovan2b8376c2015-08-15 12:14:08 -0300224struct drm_encoder *exynos_dpi_probe(struct device *dev)
Andrzej Hajda14b68732014-03-17 13:03:56 +0100225{
226 struct exynos_dpi *ctx;
227 int ret;
228
229 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
230 if (!ctx)
Andrzej Hajda4cfde1f2014-11-17 09:54:26 +0100231 return ERR_PTR(-ENOMEM);
Andrzej Hajda14b68732014-03-17 13:03:56 +0100232
233 ctx->dev = dev;
Andrzej Hajda14b68732014-03-17 13:03:56 +0100234
235 ret = exynos_dpi_parse_dt(ctx);
Andrzej Hajda000cc922014-04-03 16:26:00 +0200236 if (ret < 0) {
237 devm_kfree(dev, ctx);
Andrzej Hajda86650402015-06-11 23:23:37 +0900238 return NULL;
Andrzej Hajda000cc922014-04-03 16:26:00 +0200239 }
Andrzej Hajda14b68732014-03-17 13:03:56 +0100240
Andrzej Hajda000cc922014-04-03 16:26:00 +0200241 if (ctx->panel_node) {
242 ctx->panel = of_drm_find_panel(ctx->panel_node);
Boris Brezillon5fa8e4a2018-05-09 15:00:39 +0200243 if (IS_ERR(ctx->panel))
244 return ERR_CAST(ctx->panel);
Andrzej Hajda000cc922014-04-03 16:26:00 +0200245 }
246
Gustavo Padovancf67cc92015-08-11 17:38:06 +0900247 return &ctx->encoder;
Andrzej Hajda14b68732014-03-17 13:03:56 +0100248}
249
Gustavo Padovan2b8376c2015-08-15 12:14:08 -0300250int exynos_dpi_remove(struct drm_encoder *encoder)
Andrzej Hajda14b68732014-03-17 13:03:56 +0100251{
Gustavo Padovancf67cc92015-08-11 17:38:06 +0900252 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
Inki Daef37cd5e2014-05-09 14:25:20 +0900253
Gustavo Padovancf67cc92015-08-11 17:38:06 +0900254 exynos_dpi_disable(&ctx->encoder);
Andrzej Hajda90eac892014-09-09 15:16:11 +0200255
Andrzej Hajda90eac892014-09-09 15:16:11 +0200256 if (ctx->panel)
257 drm_panel_detach(ctx->panel);
Andrzej Hajda14b68732014-03-17 13:03:56 +0100258
Andrzej Hajda14b68732014-03-17 13:03:56 +0100259 return 0;
260}