1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Samsung MIPI DSIM glue for Exynos SoCs. |
4 | * |
5 | * Copyright (c) 2014 Samsung Electronics Co., Ltd |
6 | * |
7 | * Contacts: Tomasz Figa <t.figa@samsung.com> |
8 | */ |
9 | |
10 | #include <linux/component.h> |
11 | #include <linux/of.h> |
12 | #include <linux/platform_device.h> |
13 | |
14 | #include <drm/bridge/samsung-dsim.h> |
15 | #include <drm/drm_probe_helper.h> |
16 | #include <drm/drm_simple_kms_helper.h> |
17 | |
18 | #include "exynos_drm_crtc.h" |
19 | #include "exynos_drm_drv.h" |
20 | |
21 | struct exynos_dsi { |
22 | struct drm_encoder encoder; |
23 | }; |
24 | |
25 | static irqreturn_t exynos_dsi_te_irq_handler(struct samsung_dsim *dsim) |
26 | { |
27 | struct exynos_dsi *dsi = dsim->priv; |
28 | struct drm_encoder *encoder = &dsi->encoder; |
29 | |
30 | if (dsim->state & DSIM_STATE_VIDOUT_AVAILABLE) |
31 | exynos_drm_crtc_te_handler(crtc: encoder->crtc); |
32 | |
33 | return IRQ_HANDLED; |
34 | } |
35 | |
36 | static int exynos_dsi_host_attach(struct samsung_dsim *dsim, |
37 | struct mipi_dsi_device *device) |
38 | { |
39 | struct exynos_dsi *dsi = dsim->priv; |
40 | struct drm_encoder *encoder = &dsi->encoder; |
41 | struct drm_device *drm = encoder->dev; |
42 | |
43 | drm_bridge_attach(encoder, bridge: &dsim->bridge, |
44 | list_first_entry_or_null(&encoder->bridge_chain, |
45 | struct drm_bridge, |
46 | chain_node), flags: 0); |
47 | |
48 | mutex_lock(&drm->mode_config.mutex); |
49 | |
50 | dsim->lanes = device->lanes; |
51 | dsim->format = device->format; |
52 | dsim->mode_flags = device->mode_flags; |
53 | exynos_drm_crtc_get_by_type(drm_dev: drm, out_type: EXYNOS_DISPLAY_TYPE_LCD)->i80_mode = |
54 | !(dsim->mode_flags & MIPI_DSI_MODE_VIDEO); |
55 | |
56 | mutex_unlock(lock: &drm->mode_config.mutex); |
57 | |
58 | if (drm->mode_config.poll_enabled) |
59 | drm_kms_helper_hotplug_event(dev: drm); |
60 | |
61 | return 0; |
62 | } |
63 | |
64 | static void exynos_dsi_host_detach(struct samsung_dsim *dsim, |
65 | struct mipi_dsi_device *device) |
66 | { |
67 | struct exynos_dsi *dsi = dsim->priv; |
68 | struct drm_device *drm = dsi->encoder.dev; |
69 | |
70 | if (drm->mode_config.poll_enabled) |
71 | drm_kms_helper_hotplug_event(dev: drm); |
72 | } |
73 | |
74 | static int exynos_dsi_bind(struct device *dev, struct device *master, void *data) |
75 | { |
76 | struct samsung_dsim *dsim = dev_get_drvdata(dev); |
77 | struct exynos_dsi *dsi = dsim->priv; |
78 | struct drm_encoder *encoder = &dsi->encoder; |
79 | struct drm_device *drm_dev = data; |
80 | int ret; |
81 | |
82 | drm_simple_encoder_init(dev: drm_dev, encoder, DRM_MODE_ENCODER_TMDS); |
83 | |
84 | ret = exynos_drm_set_possible_crtcs(encoder, out_type: EXYNOS_DISPLAY_TYPE_LCD); |
85 | if (ret < 0) |
86 | return ret; |
87 | |
88 | return mipi_dsi_host_register(host: &dsim->dsi_host); |
89 | } |
90 | |
91 | static void exynos_dsi_unbind(struct device *dev, struct device *master, void *data) |
92 | { |
93 | struct samsung_dsim *dsim = dev_get_drvdata(dev); |
94 | |
95 | dsim->bridge.funcs->atomic_disable(&dsim->bridge, NULL); |
96 | |
97 | mipi_dsi_host_unregister(host: &dsim->dsi_host); |
98 | } |
99 | |
100 | static const struct component_ops exynos_dsi_component_ops = { |
101 | .bind = exynos_dsi_bind, |
102 | .unbind = exynos_dsi_unbind, |
103 | }; |
104 | |
105 | static int exynos_dsi_register_host(struct samsung_dsim *dsim) |
106 | { |
107 | struct exynos_dsi *dsi; |
108 | |
109 | dsi = devm_kzalloc(dev: dsim->dev, size: sizeof(*dsi), GFP_KERNEL); |
110 | if (!dsi) |
111 | return -ENOMEM; |
112 | |
113 | dsim->priv = dsi; |
114 | dsim->bridge.pre_enable_prev_first = true; |
115 | |
116 | return component_add(dsim->dev, &exynos_dsi_component_ops); |
117 | } |
118 | |
119 | static void exynos_dsi_unregister_host(struct samsung_dsim *dsim) |
120 | { |
121 | component_del(dsim->dev, &exynos_dsi_component_ops); |
122 | } |
123 | |
124 | static const struct samsung_dsim_host_ops exynos_dsi_exynos_host_ops = { |
125 | .register_host = exynos_dsi_register_host, |
126 | .unregister_host = exynos_dsi_unregister_host, |
127 | .attach = exynos_dsi_host_attach, |
128 | .detach = exynos_dsi_host_detach, |
129 | .te_irq_handler = exynos_dsi_te_irq_handler, |
130 | }; |
131 | |
132 | static const struct samsung_dsim_plat_data exynos3250_dsi_pdata = { |
133 | .hw_type = DSIM_TYPE_EXYNOS3250, |
134 | .host_ops = &exynos_dsi_exynos_host_ops, |
135 | }; |
136 | |
137 | static const struct samsung_dsim_plat_data exynos4210_dsi_pdata = { |
138 | .hw_type = DSIM_TYPE_EXYNOS4210, |
139 | .host_ops = &exynos_dsi_exynos_host_ops, |
140 | }; |
141 | |
142 | static const struct samsung_dsim_plat_data exynos5410_dsi_pdata = { |
143 | .hw_type = DSIM_TYPE_EXYNOS5410, |
144 | .host_ops = &exynos_dsi_exynos_host_ops, |
145 | }; |
146 | |
147 | static const struct samsung_dsim_plat_data exynos5422_dsi_pdata = { |
148 | .hw_type = DSIM_TYPE_EXYNOS5422, |
149 | .host_ops = &exynos_dsi_exynos_host_ops, |
150 | }; |
151 | |
152 | static const struct samsung_dsim_plat_data exynos5433_dsi_pdata = { |
153 | .hw_type = DSIM_TYPE_EXYNOS5433, |
154 | .host_ops = &exynos_dsi_exynos_host_ops, |
155 | }; |
156 | |
157 | static const struct of_device_id exynos_dsi_of_match[] = { |
158 | { |
159 | .compatible = "samsung,exynos3250-mipi-dsi" , |
160 | .data = &exynos3250_dsi_pdata, |
161 | }, |
162 | { |
163 | .compatible = "samsung,exynos4210-mipi-dsi" , |
164 | .data = &exynos4210_dsi_pdata, |
165 | }, |
166 | { |
167 | .compatible = "samsung,exynos5410-mipi-dsi" , |
168 | .data = &exynos5410_dsi_pdata, |
169 | }, |
170 | { |
171 | .compatible = "samsung,exynos5422-mipi-dsi" , |
172 | .data = &exynos5422_dsi_pdata, |
173 | }, |
174 | { |
175 | .compatible = "samsung,exynos5433-mipi-dsi" , |
176 | .data = &exynos5433_dsi_pdata, |
177 | }, |
178 | { /* sentinel. */ } |
179 | }; |
180 | MODULE_DEVICE_TABLE(of, exynos_dsi_of_match); |
181 | |
182 | struct platform_driver dsi_driver = { |
183 | .probe = samsung_dsim_probe, |
184 | .remove_new = samsung_dsim_remove, |
185 | .driver = { |
186 | .name = "exynos-dsi" , |
187 | .owner = THIS_MODULE, |
188 | .pm = &samsung_dsim_pm_ops, |
189 | .of_match_table = exynos_dsi_of_match, |
190 | }, |
191 | }; |
192 | |
193 | MODULE_AUTHOR("Tomasz Figa <t.figa@samsung.com>" ); |
194 | MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>" ); |
195 | MODULE_DESCRIPTION("Samsung SoC MIPI DSI Master" ); |
196 | MODULE_LICENSE("GPL v2" ); |
197 | |