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198 lines · 4.5 KiB

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