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_of.h>
28 #include "zx_drm_drv.h"
31 struct zx_drm_private {
32 struct drm_fbdev_cma *fbdev;
35 static void zx_drm_fb_output_poll_changed(struct drm_device *drm)
37 struct zx_drm_private *priv = drm->dev_private;
39 drm_fbdev_cma_hotplug_event(priv->fbdev);
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,
49 static void zx_drm_lastclose(struct drm_device *drm)
51 struct zx_drm_private *priv = drm->dev_private;
53 drm_fbdev_cma_restore_mode(priv->fbdev);
56 static const struct file_operations zx_drm_fops = {
59 .release = drm_release,
60 .unlocked_ioctl = drm_ioctl,
62 .compat_ioctl = drm_compat_ioctl,
66 .llseek = noop_llseek,
67 .mmap = drm_gem_cma_mmap,
70 static struct drm_driver zx_drm_driver = {
71 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
73 .lastclose = zx_drm_lastclose,
74 .get_vblank_counter = drm_vblank_no_hw_counter,
75 .enable_vblank = zx_vou_enable_vblank,
76 .disable_vblank = zx_vou_disable_vblank,
77 .gem_free_object = drm_gem_cma_free_object,
78 .gem_vm_ops = &drm_gem_cma_vm_ops,
79 .dumb_create = drm_gem_cma_dumb_create,
80 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
81 .dumb_destroy = drm_gem_dumb_destroy,
82 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
83 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
84 .gem_prime_export = drm_gem_prime_export,
85 .gem_prime_import = drm_gem_prime_import,
86 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
87 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
88 .gem_prime_vmap = drm_gem_cma_prime_vmap,
89 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
90 .gem_prime_mmap = drm_gem_cma_prime_mmap,
93 .desc = "ZTE VOU Controller DRM",
99 static int zx_drm_bind(struct device *dev)
101 struct drm_device *drm;
102 struct zx_drm_private *priv;
105 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
109 drm = drm_dev_alloc(&zx_drm_driver, dev);
113 drm->dev_private = priv;
114 dev_set_drvdata(dev, drm);
116 drm_mode_config_init(drm);
117 drm->mode_config.min_width = 16;
118 drm->mode_config.min_height = 16;
119 drm->mode_config.max_width = 4096;
120 drm->mode_config.max_height = 4096;
121 drm->mode_config.funcs = &zx_drm_mode_config_funcs;
123 ret = component_bind_all(dev, drm);
125 DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
129 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
131 DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
136 * We will manage irq handler on our own. In this case, irq_enabled
137 * need to be true for using vblank core support.
139 drm->irq_enabled = true;
141 drm_mode_config_reset(drm);
142 drm_kms_helper_poll_init(drm);
144 priv->fbdev = drm_fbdev_cma_init(drm, 32, drm->mode_config.num_crtc,
145 drm->mode_config.num_connector);
146 if (IS_ERR(priv->fbdev)) {
147 ret = PTR_ERR(priv->fbdev);
148 DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret);
153 ret = drm_dev_register(drm, 0);
161 drm_fbdev_cma_fini(priv->fbdev);
165 drm_kms_helper_poll_fini(drm);
166 drm_mode_config_cleanup(drm);
167 drm_vblank_cleanup(drm);
169 component_unbind_all(dev, drm);
171 dev_set_drvdata(dev, NULL);
172 drm->dev_private = NULL;
177 static void zx_drm_unbind(struct device *dev)
179 struct drm_device *drm = dev_get_drvdata(dev);
180 struct zx_drm_private *priv = drm->dev_private;
182 drm_dev_unregister(drm);
184 drm_fbdev_cma_fini(priv->fbdev);
187 drm_kms_helper_poll_fini(drm);
188 drm_mode_config_cleanup(drm);
189 drm_vblank_cleanup(drm);
190 component_unbind_all(dev, drm);
191 dev_set_drvdata(dev, NULL);
192 drm->dev_private = NULL;
196 static const struct component_master_ops zx_drm_master_ops = {
198 .unbind = zx_drm_unbind,
201 static int compare_of(struct device *dev, void *data)
203 return dev->of_node == data;
206 static int zx_drm_probe(struct platform_device *pdev)
208 struct device *dev = &pdev->dev;
209 struct device_node *parent = dev->of_node;
210 struct device_node *child;
211 struct component_match *match = NULL;
214 ret = of_platform_populate(parent, NULL, NULL, dev);
218 for_each_available_child_of_node(parent, child) {
219 component_match_add(dev, &match, compare_of, child);
223 return component_master_add_with_match(dev, &zx_drm_master_ops, match);
226 static int zx_drm_remove(struct platform_device *pdev)
228 component_master_del(&pdev->dev, &zx_drm_master_ops);
232 static const struct of_device_id zx_drm_of_match[] = {
233 { .compatible = "zte,zx296718-vou", },
236 MODULE_DEVICE_TABLE(of, zx_drm_of_match);
238 static struct platform_driver zx_drm_platform_driver = {
239 .probe = zx_drm_probe,
240 .remove = zx_drm_remove,
243 .of_match_table = zx_drm_of_match,
247 static struct platform_driver *drivers[] = {
251 &zx_drm_platform_driver,
254 static int zx_drm_init(void)
256 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
258 module_init(zx_drm_init);
260 static void zx_drm_exit(void)
262 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
264 module_exit(zx_drm_exit);
266 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
267 MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
268 MODULE_LICENSE("GPL v2");