2 * Copyright 2016 Linaro Ltd.
3 * Copyright 2016 ZTE Corporation.
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.
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>
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_gem_framebuffer_helper.h>
26 #include <drm/drm_of.h>
29 #include "zx_drm_drv.h"
32 static const struct drm_mode_config_funcs zx_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,
38 DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
40 static struct drm_driver zx_drm_driver = {
41 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
43 .gem_free_object_unlocked = drm_gem_cma_free_object,
44 .gem_vm_ops = &drm_gem_cma_vm_ops,
45 .dumb_create = drm_gem_cma_dumb_create,
46 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
47 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
48 .gem_prime_export = drm_gem_prime_export,
49 .gem_prime_import = drm_gem_prime_import,
50 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
51 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
52 .gem_prime_vmap = drm_gem_cma_prime_vmap,
53 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
54 .gem_prime_mmap = drm_gem_cma_prime_mmap,
57 .desc = "ZTE VOU Controller DRM",
63 static int zx_drm_bind(struct device *dev)
65 struct drm_device *drm;
68 drm = drm_dev_alloc(&zx_drm_driver, dev);
72 dev_set_drvdata(dev, drm);
74 drm_mode_config_init(drm);
75 drm->mode_config.min_width = 16;
76 drm->mode_config.min_height = 16;
77 drm->mode_config.max_width = 4096;
78 drm->mode_config.max_height = 4096;
79 drm->mode_config.funcs = &zx_drm_mode_config_funcs;
81 ret = component_bind_all(dev, drm);
83 DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
87 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
89 DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
94 * We will manage irq handler on our own. In this case, irq_enabled
95 * need to be true for using vblank core support.
97 drm->irq_enabled = true;
99 drm_mode_config_reset(drm);
100 drm_kms_helper_poll_init(drm);
102 ret = drm_dev_register(drm, 0);
106 drm_fbdev_generic_setup(drm, 32);
111 drm_kms_helper_poll_fini(drm);
112 drm_mode_config_cleanup(drm);
114 component_unbind_all(dev, drm);
116 dev_set_drvdata(dev, NULL);
121 static void zx_drm_unbind(struct device *dev)
123 struct drm_device *drm = dev_get_drvdata(dev);
125 drm_dev_unregister(drm);
126 drm_kms_helper_poll_fini(drm);
127 drm_atomic_helper_shutdown(drm);
128 drm_mode_config_cleanup(drm);
129 component_unbind_all(dev, drm);
130 dev_set_drvdata(dev, NULL);
134 static const struct component_master_ops zx_drm_master_ops = {
136 .unbind = zx_drm_unbind,
139 static int compare_of(struct device *dev, void *data)
141 return dev->of_node == data;
144 static int zx_drm_probe(struct platform_device *pdev)
146 struct device *dev = &pdev->dev;
147 struct device_node *parent = dev->of_node;
148 struct device_node *child;
149 struct component_match *match = NULL;
152 ret = devm_of_platform_populate(dev);
156 for_each_available_child_of_node(parent, child)
157 component_match_add(dev, &match, compare_of, child);
159 return component_master_add_with_match(dev, &zx_drm_master_ops, match);
162 static int zx_drm_remove(struct platform_device *pdev)
164 component_master_del(&pdev->dev, &zx_drm_master_ops);
168 static const struct of_device_id zx_drm_of_match[] = {
169 { .compatible = "zte,zx296718-vou", },
172 MODULE_DEVICE_TABLE(of, zx_drm_of_match);
174 static struct platform_driver zx_drm_platform_driver = {
175 .probe = zx_drm_probe,
176 .remove = zx_drm_remove,
179 .of_match_table = zx_drm_of_match,
183 static struct platform_driver *drivers[] = {
188 &zx_drm_platform_driver,
191 static int zx_drm_init(void)
193 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
195 module_init(zx_drm_init);
197 static void zx_drm_exit(void)
199 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
201 module_exit(zx_drm_exit);
204 MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
205 MODULE_LICENSE("GPL v2");