2 * Copyright (C) 2012 Russell King
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #include <linux/component.h>
10 #include <linux/module.h>
11 #include <linux/of_graph.h>
13 #include <drm/drm_crtc_helper.h>
14 #include "armada_crtc.h"
15 #include "armada_drm.h"
16 #include "armada_gem.h"
17 #include "armada_hw.h"
18 #include <drm/armada_drm.h>
19 #include "armada_ioctlP.h"
21 static void armada_drm_unref_work(struct work_struct
*work
)
23 struct armada_private
*priv
=
24 container_of(work
, struct armada_private
, fb_unref_work
);
25 struct drm_framebuffer
*fb
;
27 while (kfifo_get(&priv
->fb_unref
, &fb
))
28 drm_framebuffer_unreference(fb
);
31 /* Must be called with dev->event_lock held */
32 void __armada_drm_queue_unref_work(struct drm_device
*dev
,
33 struct drm_framebuffer
*fb
)
35 struct armada_private
*priv
= dev
->dev_private
;
37 WARN_ON(!kfifo_put(&priv
->fb_unref
, fb
));
38 schedule_work(&priv
->fb_unref_work
);
41 void armada_drm_queue_unref_work(struct drm_device
*dev
,
42 struct drm_framebuffer
*fb
)
46 spin_lock_irqsave(&dev
->event_lock
, flags
);
47 __armada_drm_queue_unref_work(dev
, fb
);
48 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
51 static int armada_drm_load(struct drm_device
*dev
, unsigned long flags
)
53 struct armada_private
*priv
;
54 struct resource
*mem
= NULL
;
58 struct resource
*r
= platform_get_resource(dev
->platformdev
,
63 /* Resources above 64K are graphics memory */
64 if (resource_size(r
) > SZ_64K
)
73 if (!devm_request_mem_region(dev
->dev
, mem
->start
,
74 resource_size(mem
), "armada-drm"))
77 priv
= devm_kzalloc(dev
->dev
, sizeof(*priv
), GFP_KERNEL
);
79 DRM_ERROR("failed to allocate private\n");
83 platform_set_drvdata(dev
->platformdev
, dev
);
84 dev
->dev_private
= priv
;
86 INIT_WORK(&priv
->fb_unref_work
, armada_drm_unref_work
);
87 INIT_KFIFO(priv
->fb_unref
);
89 /* Mode setting support */
90 drm_mode_config_init(dev
);
91 dev
->mode_config
.min_width
= 320;
92 dev
->mode_config
.min_height
= 200;
95 * With vscale enabled, the maximum width is 1920 due to the
98 dev
->mode_config
.max_width
= 1920;
99 dev
->mode_config
.max_height
= 2048;
101 dev
->mode_config
.preferred_depth
= 24;
102 dev
->mode_config
.funcs
= &armada_drm_mode_config_funcs
;
103 drm_mm_init(&priv
->linear
, mem
->start
, resource_size(mem
));
105 ret
= component_bind_all(dev
->dev
, dev
);
109 ret
= drm_vblank_init(dev
, dev
->mode_config
.num_crtc
);
113 dev
->irq_enabled
= true;
114 dev
->vblank_disable_allowed
= 1;
116 ret
= armada_fbdev_init(dev
);
120 drm_kms_helper_poll_init(dev
);
125 component_unbind_all(dev
->dev
, dev
);
127 drm_mode_config_cleanup(dev
);
128 drm_mm_takedown(&priv
->linear
);
129 flush_work(&priv
->fb_unref_work
);
134 static int armada_drm_unload(struct drm_device
*dev
)
136 struct armada_private
*priv
= dev
->dev_private
;
138 drm_kms_helper_poll_fini(dev
);
139 armada_fbdev_fini(dev
);
141 component_unbind_all(dev
->dev
, dev
);
143 drm_mode_config_cleanup(dev
);
144 drm_mm_takedown(&priv
->linear
);
145 flush_work(&priv
->fb_unref_work
);
146 dev
->dev_private
= NULL
;
151 /* These are called under the vbl_lock. */
152 static int armada_drm_enable_vblank(struct drm_device
*dev
, int crtc
)
154 struct armada_private
*priv
= dev
->dev_private
;
155 armada_drm_crtc_enable_irq(priv
->dcrtc
[crtc
], VSYNC_IRQ_ENA
);
159 static void armada_drm_disable_vblank(struct drm_device
*dev
, int crtc
)
161 struct armada_private
*priv
= dev
->dev_private
;
162 armada_drm_crtc_disable_irq(priv
->dcrtc
[crtc
], VSYNC_IRQ_ENA
);
165 static struct drm_ioctl_desc armada_ioctls
[] = {
166 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE
, armada_gem_create_ioctl
,
168 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP
, armada_gem_mmap_ioctl
,
170 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE
, armada_gem_pwrite_ioctl
,
174 static void armada_drm_lastclose(struct drm_device
*dev
)
176 armada_fbdev_lastclose(dev
);
179 static const struct file_operations armada_drm_fops
= {
180 .owner
= THIS_MODULE
,
184 .unlocked_ioctl
= drm_ioctl
,
185 .mmap
= drm_gem_mmap
,
187 .release
= drm_release
,
190 static struct drm_driver armada_drm_driver
= {
191 .load
= armada_drm_load
,
195 .lastclose
= armada_drm_lastclose
,
196 .unload
= armada_drm_unload
,
197 .set_busid
= drm_platform_set_busid
,
198 .get_vblank_counter
= drm_vblank_count
,
199 .enable_vblank
= armada_drm_enable_vblank
,
200 .disable_vblank
= armada_drm_disable_vblank
,
201 #ifdef CONFIG_DEBUG_FS
202 .debugfs_init
= armada_drm_debugfs_init
,
203 .debugfs_cleanup
= armada_drm_debugfs_cleanup
,
205 .gem_free_object
= armada_gem_free_object
,
206 .prime_handle_to_fd
= drm_gem_prime_handle_to_fd
,
207 .prime_fd_to_handle
= drm_gem_prime_fd_to_handle
,
208 .gem_prime_export
= armada_gem_prime_export
,
209 .gem_prime_import
= armada_gem_prime_import
,
210 .dumb_create
= armada_gem_dumb_create
,
211 .dumb_map_offset
= armada_gem_dumb_map_offset
,
212 .dumb_destroy
= armada_gem_dumb_destroy
,
213 .gem_vm_ops
= &armada_gem_vm_ops
,
216 .name
= "armada-drm",
217 .desc
= "Armada SoC DRM",
219 .driver_features
= DRIVER_GEM
| DRIVER_MODESET
|
220 DRIVER_HAVE_IRQ
| DRIVER_PRIME
,
221 .ioctls
= armada_ioctls
,
222 .fops
= &armada_drm_fops
,
225 static int armada_drm_bind(struct device
*dev
)
227 return drm_platform_init(&armada_drm_driver
, to_platform_device(dev
));
230 static void armada_drm_unbind(struct device
*dev
)
232 drm_put_dev(dev_get_drvdata(dev
));
235 static int compare_of(struct device
*dev
, void *data
)
237 return dev
->of_node
== data
;
240 static int compare_dev_name(struct device
*dev
, void *data
)
242 const char *name
= data
;
243 return !strcmp(dev_name(dev
), name
);
246 static void armada_add_endpoints(struct device
*dev
,
247 struct component_match
**match
, struct device_node
*port
)
249 struct device_node
*ep
, *remote
;
251 for_each_child_of_node(port
, ep
) {
252 remote
= of_graph_get_remote_port_parent(ep
);
253 if (!remote
|| !of_device_is_available(remote
)) {
256 } else if (!of_device_is_available(remote
->parent
)) {
257 dev_warn(dev
, "parent device of %s is not available\n",
263 component_match_add(dev
, match
, compare_of
, remote
);
268 static int armada_drm_find_components(struct device
*dev
,
269 struct component_match
**match
)
271 struct device_node
*port
;
275 struct device_node
*np
= dev
->of_node
;
278 port
= of_parse_phandle(np
, "ports", i
);
282 component_match_add(dev
, match
, compare_of
, port
);
287 dev_err(dev
, "missing 'ports' property\n");
292 port
= of_parse_phandle(np
, "ports", i
);
296 armada_add_endpoints(dev
, match
, port
);
299 } else if (dev
->platform_data
) {
300 char **devices
= dev
->platform_data
;
303 for (i
= 0; devices
[i
]; i
++)
304 component_match_add(dev
, match
, compare_dev_name
,
308 dev_err(dev
, "missing 'ports' property\n");
312 for (i
= 0; devices
[i
]; i
++) {
313 d
= bus_find_device_by_name(&platform_bus_type
, NULL
,
315 if (d
&& d
->of_node
) {
316 for_each_child_of_node(d
->of_node
, port
)
317 armada_add_endpoints(dev
, match
, port
);
326 static const struct component_master_ops armada_master_ops
= {
327 .bind
= armada_drm_bind
,
328 .unbind
= armada_drm_unbind
,
331 static int armada_drm_probe(struct platform_device
*pdev
)
333 struct component_match
*match
= NULL
;
336 ret
= armada_drm_find_components(&pdev
->dev
, &match
);
340 return component_master_add_with_match(&pdev
->dev
, &armada_master_ops
,
344 static int armada_drm_remove(struct platform_device
*pdev
)
346 component_master_del(&pdev
->dev
, &armada_master_ops
);
350 static const struct platform_device_id armada_drm_platform_ids
[] = {
352 .name
= "armada-drm",
354 .name
= "armada-510-drm",
358 MODULE_DEVICE_TABLE(platform
, armada_drm_platform_ids
);
360 static struct platform_driver armada_drm_platform_driver
= {
361 .probe
= armada_drm_probe
,
362 .remove
= armada_drm_remove
,
364 .name
= "armada-drm",
366 .id_table
= armada_drm_platform_ids
,
369 static int __init
armada_drm_init(void)
373 armada_drm_driver
.num_ioctls
= ARRAY_SIZE(armada_ioctls
);
375 ret
= platform_driver_register(&armada_lcd_platform_driver
);
378 ret
= platform_driver_register(&armada_drm_platform_driver
);
380 platform_driver_unregister(&armada_lcd_platform_driver
);
383 module_init(armada_drm_init
);
385 static void __exit
armada_drm_exit(void)
387 platform_driver_unregister(&armada_drm_platform_driver
);
388 platform_driver_unregister(&armada_lcd_platform_driver
);
390 module_exit(armada_drm_exit
);
392 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
393 MODULE_DESCRIPTION("Armada DRM Driver");
394 MODULE_LICENSE("GPL");
395 MODULE_ALIAS("platform:armada-drm");