1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright 2016 Linaro Ltd.
  4 * Copyright 2016 ZTE Corporation.
  5 */
  6
  7#include <linux/clk.h>
  8#include <linux/component.h>
  9#include <linux/list.h>
 10#include <linux/module.h>
 11#include <linux/of_graph.h>
 12#include <linux/of_platform.h>
 13#include <linux/spinlock.h>
 14
 15#include <drm/drm_atomic_helper.h>
 16#include <drm/drm_crtc.h>
 17#include <drm/drm_drv.h>
 18#include <drm/drm_fb_cma_helper.h>
 19#include <drm/drm_fb_helper.h>
 20#include <drm/drm_gem_cma_helper.h>
 21#include <drm/drm_gem_framebuffer_helper.h>
 22#include <drm/drm_of.h>
 23#include <drm/drm_probe_helper.h>
 24#include <drm/drm_vblank.h>
 25
 26#include "zx_drm_drv.h"
 27#include "zx_vou.h"
 28
 29static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
 30	.fb_create = drm_gem_fb_create,
 31	.atomic_check = drm_atomic_helper_check,
 32	.atomic_commit = drm_atomic_helper_commit,
 33};
 34
 35DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
 36
 37static const struct drm_driver zx_drm_driver = {
 38	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 39	DRM_GEM_CMA_DRIVER_OPS,
 40	.fops = &zx_drm_fops,
 41	.name = "zx-vou",
 42	.desc = "ZTE VOU Controller DRM",
 43	.date = "20160811",
 44	.major = 1,
 45	.minor = 0,
 46};
 47
 48static int zx_drm_bind(struct device *dev)
 49{
 50	struct drm_device *drm;
 51	int ret;
 52
 53	drm = drm_dev_alloc(&zx_drm_driver, dev);
 54	if (IS_ERR(drm))
 55		return PTR_ERR(drm);
 56
 57	dev_set_drvdata(dev, drm);
 58
 59	drm_mode_config_init(drm);
 60	drm->mode_config.min_width = 16;
 61	drm->mode_config.min_height = 16;
 62	drm->mode_config.max_width = 4096;
 63	drm->mode_config.max_height = 4096;
 64	drm->mode_config.funcs = &zx_drm_mode_config_funcs;
 65
 66	ret = component_bind_all(dev, drm);
 67	if (ret) {
 68		DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
 69		goto out_unregister;
 70	}
 71
 72	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 73	if (ret < 0) {
 74		DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
 75		goto out_unbind;
 76	}
 77
 78	/*
 79	 * We will manage irq handler on our own.  In this case, irq_enabled
 80	 * need to be true for using vblank core support.
 81	 */
 82	drm->irq_enabled = true;
 83
 84	drm_mode_config_reset(drm);
 85	drm_kms_helper_poll_init(drm);
 86
 87	ret = drm_dev_register(drm, 0);
 88	if (ret)
 89		goto out_poll_fini;
 90
 91	drm_fbdev_generic_setup(drm, 32);
 92
 93	return 0;
 94
 95out_poll_fini:
 96	drm_kms_helper_poll_fini(drm);
 97	drm_mode_config_cleanup(drm);
 98out_unbind:
 99	component_unbind_all(dev, drm);
100out_unregister:
101	dev_set_drvdata(dev, NULL);
102	drm_dev_put(drm);
103	return ret;
104}
105
106static void zx_drm_unbind(struct device *dev)
107{
108	struct drm_device *drm = dev_get_drvdata(dev);
109
110	drm_dev_unregister(drm);
111	drm_kms_helper_poll_fini(drm);
112	drm_atomic_helper_shutdown(drm);
113	drm_mode_config_cleanup(drm);
114	component_unbind_all(dev, drm);
115	dev_set_drvdata(dev, NULL);
116	drm_dev_put(drm);
117}
118
119static const struct component_master_ops zx_drm_master_ops = {
120	.bind = zx_drm_bind,
121	.unbind = zx_drm_unbind,
122};
123
124static int compare_of(struct device *dev, void *data)
125{
126	return dev->of_node == data;
127}
128
129static int zx_drm_probe(struct platform_device *pdev)
130{
131	struct device *dev = &pdev->dev;
132	struct device_node *parent = dev->of_node;
133	struct device_node *child;
134	struct component_match *match = NULL;
135	int ret;
136
137	ret = devm_of_platform_populate(dev);
138	if (ret)
139		return ret;
140
141	for_each_available_child_of_node(parent, child)
142		component_match_add(dev, &match, compare_of, child);
143
144	return component_master_add_with_match(dev, &zx_drm_master_ops, match);
145}
146
147static int zx_drm_remove(struct platform_device *pdev)
148{
149	component_master_del(&pdev->dev, &zx_drm_master_ops);
150	return 0;
151}
152
153static const struct of_device_id zx_drm_of_match[] = {
154	{ .compatible = "zte,zx296718-vou", },
155	{ /* end */ },
156};
157MODULE_DEVICE_TABLE(of, zx_drm_of_match);
158
159static struct platform_driver zx_drm_platform_driver = {
160	.probe = zx_drm_probe,
161	.remove = zx_drm_remove,
162	.driver	= {
163		.name = "zx-drm",
164		.of_match_table	= zx_drm_of_match,
165	},
166};
167
168static struct platform_driver *drivers[] = {
169	&zx_crtc_driver,
170	&zx_hdmi_driver,
171	&zx_tvenc_driver,
172	&zx_vga_driver,
173	&zx_drm_platform_driver,
174};
175
176static int zx_drm_init(void)
177{
178	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
179}
180module_init(zx_drm_init);
181
182static void zx_drm_exit(void)
183{
184	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
185}
186module_exit(zx_drm_exit);
187
188MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
189MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
190MODULE_LICENSE("GPL v2");