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[linux.git] / drivers / gpu / drm / sprd / sprd_drm.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2020 Unisoc Inc.
4  */
5
6 #include <linux/component.h>
7 #include <linux/dma-mapping.h>
8 #include <linux/module.h>
9 #include <linux/mutex.h>
10 #include <linux/of_graph.h>
11 #include <linux/of_platform.h>
12
13 #include <drm/drm_atomic_helper.h>
14 #include <drm/drm_crtc_helper.h>
15 #include <drm/drm_drv.h>
16 #include <drm/drm_gem_cma_helper.h>
17 #include <drm/drm_gem_framebuffer_helper.h>
18 #include <drm/drm_of.h>
19 #include <drm/drm_probe_helper.h>
20 #include <drm/drm_vblank.h>
21
22 #include "sprd_drm.h"
23
24 #define DRIVER_NAME     "sprd"
25 #define DRIVER_DESC     "Spreadtrum SoCs' DRM Driver"
26 #define DRIVER_DATE     "20200201"
27 #define DRIVER_MAJOR    1
28 #define DRIVER_MINOR    0
29
30 static const struct drm_mode_config_helper_funcs sprd_drm_mode_config_helper = {
31         .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
32 };
33
34 static const struct drm_mode_config_funcs sprd_drm_mode_config_funcs = {
35         .fb_create = drm_gem_fb_create,
36         .atomic_check = drm_atomic_helper_check,
37         .atomic_commit = drm_atomic_helper_commit,
38 };
39
40 static void sprd_drm_mode_config_init(struct drm_device *drm)
41 {
42         drm->mode_config.min_width = 0;
43         drm->mode_config.min_height = 0;
44         drm->mode_config.max_width = 8192;
45         drm->mode_config.max_height = 8192;
46         drm->mode_config.allow_fb_modifiers = true;
47
48         drm->mode_config.funcs = &sprd_drm_mode_config_funcs;
49         drm->mode_config.helper_private = &sprd_drm_mode_config_helper;
50 }
51
52 DEFINE_DRM_GEM_CMA_FOPS(sprd_drm_fops);
53
54 static struct drm_driver sprd_drm_drv = {
55         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
56         .fops                   = &sprd_drm_fops,
57
58         /* GEM Operations */
59         DRM_GEM_CMA_DRIVER_OPS,
60
61         .name                   = DRIVER_NAME,
62         .desc                   = DRIVER_DESC,
63         .date                   = DRIVER_DATE,
64         .major                  = DRIVER_MAJOR,
65         .minor                  = DRIVER_MINOR,
66 };
67
68 static int sprd_drm_bind(struct device *dev)
69 {
70         struct platform_device *pdev = to_platform_device(dev);
71         struct drm_device *drm;
72         struct sprd_drm *sprd;
73         int ret;
74
75         sprd = devm_drm_dev_alloc(dev, &sprd_drm_drv, struct sprd_drm, drm);
76         if (IS_ERR(sprd))
77                 return PTR_ERR(sprd);
78
79         drm = &sprd->drm;
80         platform_set_drvdata(pdev, drm);
81
82         ret = drmm_mode_config_init(drm);
83         if (ret)
84                 return ret;
85
86         sprd_drm_mode_config_init(drm);
87
88         /* bind and init sub drivers */
89         ret = component_bind_all(drm->dev, drm);
90         if (ret) {
91                 drm_err(drm, "failed to bind all component.\n");
92                 return ret;
93         }
94
95         /* vblank init */
96         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
97         if (ret) {
98                 drm_err(drm, "failed to initialize vblank.\n");
99                 goto err_unbind_all;
100         }
101
102         /* reset all the states of crtc/plane/encoder/connector */
103         drm_mode_config_reset(drm);
104
105         /* init kms poll for handling hpd */
106         drm_kms_helper_poll_init(drm);
107
108         ret = drm_dev_register(drm, 0);
109         if (ret < 0)
110                 goto err_kms_helper_poll_fini;
111
112         return 0;
113
114 err_kms_helper_poll_fini:
115         drm_kms_helper_poll_fini(drm);
116 err_unbind_all:
117         component_unbind_all(drm->dev, drm);
118         return ret;
119 }
120
121 static void sprd_drm_unbind(struct device *dev)
122 {
123         struct drm_device *drm = dev_get_drvdata(dev);
124
125         drm_dev_unregister(drm);
126
127         drm_kms_helper_poll_fini(drm);
128
129         component_unbind_all(drm->dev, drm);
130 }
131
132 static const struct component_master_ops drm_component_ops = {
133         .bind = sprd_drm_bind,
134         .unbind = sprd_drm_unbind,
135 };
136
137 static int compare_of(struct device *dev, void *data)
138 {
139         return dev->of_node == data;
140 }
141
142 static int sprd_drm_probe(struct platform_device *pdev)
143 {
144         return drm_of_component_probe(&pdev->dev, compare_of, &drm_component_ops);
145 }
146
147 static int sprd_drm_remove(struct platform_device *pdev)
148 {
149         component_master_del(&pdev->dev, &drm_component_ops);
150         return 0;
151 }
152
153 static void sprd_drm_shutdown(struct platform_device *pdev)
154 {
155         struct drm_device *drm = platform_get_drvdata(pdev);
156
157         if (!drm) {
158                 drm_warn(drm, "drm device is not available, no shutdown\n");
159                 return;
160         }
161
162         drm_atomic_helper_shutdown(drm);
163 }
164
165 static const struct of_device_id drm_match_table[] = {
166         { .compatible = "sprd,display-subsystem", },
167         { /* sentinel */ },
168 };
169 MODULE_DEVICE_TABLE(of, drm_match_table);
170
171 static struct platform_driver sprd_drm_driver = {
172         .probe = sprd_drm_probe,
173         .remove = sprd_drm_remove,
174         .shutdown = sprd_drm_shutdown,
175         .driver = {
176                 .name = "sprd-drm-drv",
177                 .of_match_table = drm_match_table,
178         },
179 };
180
181 static struct platform_driver *sprd_drm_drivers[]  = {
182         &sprd_drm_driver,
183         &sprd_dpu_driver,
184         &sprd_dsi_driver,
185 };
186
187 static int __init sprd_drm_init(void)
188 {
189         return platform_register_drivers(sprd_drm_drivers,
190                                         ARRAY_SIZE(sprd_drm_drivers));
191 }
192
193 static void __exit sprd_drm_exit(void)
194 {
195         platform_unregister_drivers(sprd_drm_drivers,
196                                     ARRAY_SIZE(sprd_drm_drivers));
197 }
198
199 module_init(sprd_drm_init);
200 module_exit(sprd_drm_exit);
201
202 MODULE_AUTHOR("Leon He <[email protected]>");
203 MODULE_AUTHOR("Kevin Tang <[email protected]>");
204 MODULE_DESCRIPTION("Unisoc DRM KMS Master Driver");
205 MODULE_LICENSE("GPL v2");
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