2 * Copyright (C) 2012 Avionic Design GmbH
3 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
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.
10 #include <linux/clk.h>
11 #include <linux/err.h>
12 #include <linux/module.h>
14 #include <linux/platform_device.h>
18 struct host1x_drm_client
{
19 struct host1x_client
*client
;
20 struct device_node
*np
;
21 struct list_head list
;
24 static int host1x_add_drm_client(struct host1x
*host1x
, struct device_node
*np
)
26 struct host1x_drm_client
*client
;
28 client
= kzalloc(sizeof(*client
), GFP_KERNEL
);
32 INIT_LIST_HEAD(&client
->list
);
33 client
->np
= of_node_get(np
);
35 list_add_tail(&client
->list
, &host1x
->drm_clients
);
40 static int host1x_activate_drm_client(struct host1x
*host1x
,
41 struct host1x_drm_client
*drm
,
42 struct host1x_client
*client
)
44 mutex_lock(&host1x
->drm_clients_lock
);
45 list_del_init(&drm
->list
);
46 list_add_tail(&drm
->list
, &host1x
->drm_active
);
48 mutex_unlock(&host1x
->drm_clients_lock
);
53 static int host1x_remove_drm_client(struct host1x
*host1x
,
54 struct host1x_drm_client
*client
)
56 mutex_lock(&host1x
->drm_clients_lock
);
57 list_del_init(&client
->list
);
58 mutex_unlock(&host1x
->drm_clients_lock
);
60 of_node_put(client
->np
);
66 static int host1x_parse_dt(struct host1x
*host1x
)
68 static const char * const compat
[] = {
70 "nvidia,tegra20-hdmi",
72 "nvidia,tegra30-hdmi",
77 for (i
= 0; i
< ARRAY_SIZE(compat
); i
++) {
78 struct device_node
*np
;
80 for_each_child_of_node(host1x
->dev
->of_node
, np
) {
81 if (of_device_is_compatible(np
, compat
[i
]) &&
82 of_device_is_available(np
)) {
83 err
= host1x_add_drm_client(host1x
, np
);
93 static int tegra_host1x_probe(struct platform_device
*pdev
)
95 struct host1x
*host1x
;
96 struct resource
*regs
;
99 host1x
= devm_kzalloc(&pdev
->dev
, sizeof(*host1x
), GFP_KERNEL
);
103 mutex_init(&host1x
->drm_clients_lock
);
104 INIT_LIST_HEAD(&host1x
->drm_clients
);
105 INIT_LIST_HEAD(&host1x
->drm_active
);
106 mutex_init(&host1x
->clients_lock
);
107 INIT_LIST_HEAD(&host1x
->clients
);
108 host1x
->dev
= &pdev
->dev
;
110 err
= host1x_parse_dt(host1x
);
112 dev_err(&pdev
->dev
, "failed to parse DT: %d\n", err
);
116 host1x
->clk
= devm_clk_get(&pdev
->dev
, NULL
);
117 if (IS_ERR(host1x
->clk
))
118 return PTR_ERR(host1x
->clk
);
120 err
= clk_prepare_enable(host1x
->clk
);
124 regs
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
130 err
= platform_get_irq(pdev
, 0);
134 host1x
->syncpt
= err
;
136 err
= platform_get_irq(pdev
, 1);
142 host1x
->regs
= devm_request_and_ioremap(&pdev
->dev
, regs
);
144 err
= -EADDRNOTAVAIL
;
148 platform_set_drvdata(pdev
, host1x
);
153 clk_disable_unprepare(host1x
->clk
);
157 static int tegra_host1x_remove(struct platform_device
*pdev
)
159 struct host1x
*host1x
= platform_get_drvdata(pdev
);
161 clk_disable_unprepare(host1x
->clk
);
166 int host1x_drm_init(struct host1x
*host1x
, struct drm_device
*drm
)
168 struct host1x_client
*client
;
170 mutex_lock(&host1x
->clients_lock
);
172 list_for_each_entry(client
, &host1x
->clients
, list
) {
173 if (client
->ops
&& client
->ops
->drm_init
) {
174 int err
= client
->ops
->drm_init(client
, drm
);
177 "DRM setup failed for %s: %d\n",
178 dev_name(client
->dev
), err
);
184 mutex_unlock(&host1x
->clients_lock
);
189 int host1x_drm_exit(struct host1x
*host1x
)
191 struct platform_device
*pdev
= to_platform_device(host1x
->dev
);
192 struct host1x_client
*client
;
197 mutex_lock(&host1x
->clients_lock
);
199 list_for_each_entry_reverse(client
, &host1x
->clients
, list
) {
200 if (client
->ops
&& client
->ops
->drm_exit
) {
201 int err
= client
->ops
->drm_exit(client
);
204 "DRM cleanup failed for %s: %d\n",
205 dev_name(client
->dev
), err
);
211 mutex_unlock(&host1x
->clients_lock
);
213 drm_platform_exit(&tegra_drm_driver
, pdev
);
219 int host1x_register_client(struct host1x
*host1x
, struct host1x_client
*client
)
221 struct host1x_drm_client
*drm
, *tmp
;
224 mutex_lock(&host1x
->clients_lock
);
225 list_add_tail(&client
->list
, &host1x
->clients
);
226 mutex_unlock(&host1x
->clients_lock
);
228 list_for_each_entry_safe(drm
, tmp
, &host1x
->drm_clients
, list
)
229 if (drm
->np
== client
->dev
->of_node
)
230 host1x_activate_drm_client(host1x
, drm
, client
);
232 if (list_empty(&host1x
->drm_clients
)) {
233 struct platform_device
*pdev
= to_platform_device(host1x
->dev
);
235 err
= drm_platform_init(&tegra_drm_driver
, pdev
);
237 dev_err(host1x
->dev
, "drm_platform_init(): %d\n", err
);
242 client
->host1x
= host1x
;
247 int host1x_unregister_client(struct host1x
*host1x
,
248 struct host1x_client
*client
)
250 struct host1x_drm_client
*drm
, *tmp
;
253 list_for_each_entry_safe(drm
, tmp
, &host1x
->drm_active
, list
) {
254 if (drm
->client
== client
) {
255 err
= host1x_drm_exit(host1x
);
257 dev_err(host1x
->dev
, "host1x_drm_exit(): %d\n",
262 host1x_remove_drm_client(host1x
, drm
);
267 mutex_lock(&host1x
->clients_lock
);
268 list_del_init(&client
->list
);
269 mutex_unlock(&host1x
->clients_lock
);
274 static struct of_device_id tegra_host1x_of_match
[] = {
275 { .compatible
= "nvidia,tegra30-host1x", },
276 { .compatible
= "nvidia,tegra20-host1x", },
279 MODULE_DEVICE_TABLE(of
, tegra_host1x_of_match
);
281 struct platform_driver tegra_host1x_driver
= {
283 .name
= "tegra-host1x",
284 .owner
= THIS_MODULE
,
285 .of_match_table
= tegra_host1x_of_match
,
287 .probe
= tegra_host1x_probe
,
288 .remove
= tegra_host1x_remove
,
291 static int __init
tegra_host1x_init(void)
295 err
= platform_driver_register(&tegra_host1x_driver
);
299 err
= platform_driver_register(&tegra_dc_driver
);
301 goto unregister_host1x
;
303 err
= platform_driver_register(&tegra_hdmi_driver
);
310 platform_driver_unregister(&tegra_dc_driver
);
312 platform_driver_unregister(&tegra_host1x_driver
);
315 module_init(tegra_host1x_init
);
317 static void __exit
tegra_host1x_exit(void)
319 platform_driver_unregister(&tegra_hdmi_driver
);
320 platform_driver_unregister(&tegra_dc_driver
);
321 platform_driver_unregister(&tegra_host1x_driver
);
323 module_exit(tegra_host1x_exit
);
325 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
326 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
327 MODULE_LICENSE("GPL");