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drm: Make drm_atomic_replace_property_blob_from_id() more generic
[karo-tx-linux.git] / drivers / gpu / drm / zte / zx_drm_drv.c
1 /*
2  * Copyright 2016 Linaro Ltd.
3  * Copyright 2016 ZTE Corporation.
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  *
9  */
10
11 #include <linux/clk.h>
12 #include <linux/component.h>
13 #include <linux/list.h>
14 #include <linux/module.h>
15 #include <linux/of_graph.h>
16 #include <linux/of_platform.h>
17 #include <linux/spinlock.h>
18
19 #include <drm/drm_atomic_helper.h>
20 #include <drm/drm_crtc.h>
21 #include <drm/drm_crtc_helper.h>
22 #include <drm/drm_fb_cma_helper.h>
23 #include <drm/drm_fb_helper.h>
24 #include <drm/drm_gem_cma_helper.h>
25 #include <drm/drm_of.h>
26 #include <drm/drmP.h>
27
28 #include "zx_drm_drv.h"
29 #include "zx_vou.h"
30
31 struct zx_drm_private {
32         struct drm_fbdev_cma *fbdev;
33 };
34
35 static void zx_drm_fb_output_poll_changed(struct drm_device *drm)
36 {
37         struct zx_drm_private *priv = drm->dev_private;
38
39         drm_fbdev_cma_hotplug_event(priv->fbdev);
40 }
41
42 static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
43         .fb_create = drm_fb_cma_create,
44         .output_poll_changed = zx_drm_fb_output_poll_changed,
45         .atomic_check = drm_atomic_helper_check,
46         .atomic_commit = drm_atomic_helper_commit,
47 };
48
49 static void zx_drm_lastclose(struct drm_device *drm)
50 {
51         struct zx_drm_private *priv = drm->dev_private;
52
53         drm_fbdev_cma_restore_mode(priv->fbdev);
54 }
55
56 DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
57
58 static struct drm_driver zx_drm_driver = {
59         .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
60                            DRIVER_ATOMIC,
61         .lastclose = zx_drm_lastclose,
62         .gem_free_object = drm_gem_cma_free_object,
63         .gem_vm_ops = &drm_gem_cma_vm_ops,
64         .dumb_create = drm_gem_cma_dumb_create,
65         .dumb_map_offset = drm_gem_cma_dumb_map_offset,
66         .dumb_destroy = drm_gem_dumb_destroy,
67         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
68         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
69         .gem_prime_export = drm_gem_prime_export,
70         .gem_prime_import = drm_gem_prime_import,
71         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
72         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
73         .gem_prime_vmap = drm_gem_cma_prime_vmap,
74         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
75         .gem_prime_mmap = drm_gem_cma_prime_mmap,
76         .fops = &zx_drm_fops,
77         .name = "zx-vou",
78         .desc = "ZTE VOU Controller DRM",
79         .date = "20160811",
80         .major = 1,
81         .minor = 0,
82 };
83
84 static int zx_drm_bind(struct device *dev)
85 {
86         struct drm_device *drm;
87         struct zx_drm_private *priv;
88         int ret;
89
90         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
91         if (!priv)
92                 return -ENOMEM;
93
94         drm = drm_dev_alloc(&zx_drm_driver, dev);
95         if (IS_ERR(drm))
96                 return PTR_ERR(drm);
97
98         drm->dev_private = priv;
99         dev_set_drvdata(dev, drm);
100
101         drm_mode_config_init(drm);
102         drm->mode_config.min_width = 16;
103         drm->mode_config.min_height = 16;
104         drm->mode_config.max_width = 4096;
105         drm->mode_config.max_height = 4096;
106         drm->mode_config.funcs = &zx_drm_mode_config_funcs;
107
108         ret = component_bind_all(dev, drm);
109         if (ret) {
110                 DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
111                 goto out_unregister;
112         }
113
114         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
115         if (ret < 0) {
116                 DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
117                 goto out_unbind;
118         }
119
120         /*
121          * We will manage irq handler on our own.  In this case, irq_enabled
122          * need to be true for using vblank core support.
123          */
124         drm->irq_enabled = true;
125
126         drm_mode_config_reset(drm);
127         drm_kms_helper_poll_init(drm);
128
129         priv->fbdev = drm_fbdev_cma_init(drm, 32,
130                                          drm->mode_config.num_connector);
131         if (IS_ERR(priv->fbdev)) {
132                 ret = PTR_ERR(priv->fbdev);
133                 DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret);
134                 priv->fbdev = NULL;
135                 goto out_poll_fini;
136         }
137
138         ret = drm_dev_register(drm, 0);
139         if (ret)
140                 goto out_fbdev_fini;
141
142         return 0;
143
144 out_fbdev_fini:
145         if (priv->fbdev) {
146                 drm_fbdev_cma_fini(priv->fbdev);
147                 priv->fbdev = NULL;
148         }
149 out_poll_fini:
150         drm_kms_helper_poll_fini(drm);
151         drm_mode_config_cleanup(drm);
152         drm_vblank_cleanup(drm);
153 out_unbind:
154         component_unbind_all(dev, drm);
155 out_unregister:
156         dev_set_drvdata(dev, NULL);
157         drm->dev_private = NULL;
158         drm_dev_unref(drm);
159         return ret;
160 }
161
162 static void zx_drm_unbind(struct device *dev)
163 {
164         struct drm_device *drm = dev_get_drvdata(dev);
165         struct zx_drm_private *priv = drm->dev_private;
166
167         drm_dev_unregister(drm);
168         if (priv->fbdev) {
169                 drm_fbdev_cma_fini(priv->fbdev);
170                 priv->fbdev = NULL;
171         }
172         drm_kms_helper_poll_fini(drm);
173         drm_mode_config_cleanup(drm);
174         drm_vblank_cleanup(drm);
175         component_unbind_all(dev, drm);
176         dev_set_drvdata(dev, NULL);
177         drm->dev_private = NULL;
178         drm_dev_unref(drm);
179 }
180
181 static const struct component_master_ops zx_drm_master_ops = {
182         .bind = zx_drm_bind,
183         .unbind = zx_drm_unbind,
184 };
185
186 static int compare_of(struct device *dev, void *data)
187 {
188         return dev->of_node == data;
189 }
190
191 static int zx_drm_probe(struct platform_device *pdev)
192 {
193         struct device *dev = &pdev->dev;
194         struct device_node *parent = dev->of_node;
195         struct device_node *child;
196         struct component_match *match = NULL;
197         int ret;
198
199         ret = of_platform_populate(parent, NULL, NULL, dev);
200         if (ret)
201                 return ret;
202
203         for_each_available_child_of_node(parent, child) {
204                 component_match_add(dev, &match, compare_of, child);
205                 of_node_put(child);
206         }
207
208         return component_master_add_with_match(dev, &zx_drm_master_ops, match);
209 }
210
211 static int zx_drm_remove(struct platform_device *pdev)
212 {
213         component_master_del(&pdev->dev, &zx_drm_master_ops);
214         return 0;
215 }
216
217 static const struct of_device_id zx_drm_of_match[] = {
218         { .compatible = "zte,zx296718-vou", },
219         { /* end */ },
220 };
221 MODULE_DEVICE_TABLE(of, zx_drm_of_match);
222
223 static struct platform_driver zx_drm_platform_driver = {
224         .probe = zx_drm_probe,
225         .remove = zx_drm_remove,
226         .driver = {
227                 .name = "zx-drm",
228                 .of_match_table = zx_drm_of_match,
229         },
230 };
231
232 static struct platform_driver *drivers[] = {
233         &zx_crtc_driver,
234         &zx_hdmi_driver,
235         &zx_tvenc_driver,
236         &zx_drm_platform_driver,
237 };
238
239 static int zx_drm_init(void)
240 {
241         return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
242 }
243 module_init(zx_drm_init);
244
245 static void zx_drm_exit(void)
246 {
247         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
248 }
249 module_exit(zx_drm_exit);
250
251 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
252 MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
253 MODULE_LICENSE("GPL v2");