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 <drm/drm_of.h>
15 #include "armada_crtc.h"
16 #include "armada_drm.h"
17 #include "armada_gem.h"
18 #include "armada_hw.h"
19 #include <drm/armada_drm.h>
20 #include "armada_ioctlP.h"
22 static void armada_drm_unref_work(struct work_struct
*work
)
24 struct armada_private
*priv
=
25 container_of(work
, struct armada_private
, fb_unref_work
);
26 struct drm_framebuffer
*fb
;
28 while (kfifo_get(&priv
->fb_unref
, &fb
))
29 drm_framebuffer_unreference(fb
);
32 /* Must be called with dev->event_lock held */
33 void __armada_drm_queue_unref_work(struct drm_device
*dev
,
34 struct drm_framebuffer
*fb
)
36 struct armada_private
*priv
= dev
->dev_private
;
38 WARN_ON(!kfifo_put(&priv
->fb_unref
, fb
));
39 schedule_work(&priv
->fb_unref_work
);
42 void armada_drm_queue_unref_work(struct drm_device
*dev
,
43 struct drm_framebuffer
*fb
)
47 spin_lock_irqsave(&dev
->event_lock
, flags
);
48 __armada_drm_queue_unref_work(dev
, fb
);
49 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
52 /* These are called under the vbl_lock. */
53 static int armada_drm_enable_vblank(struct drm_device
*dev
, unsigned int pipe
)
55 struct armada_private
*priv
= dev
->dev_private
;
56 armada_drm_crtc_enable_irq(priv
->dcrtc
[pipe
], VSYNC_IRQ_ENA
);
60 static void armada_drm_disable_vblank(struct drm_device
*dev
, unsigned int pipe
)
62 struct armada_private
*priv
= dev
->dev_private
;
63 armada_drm_crtc_disable_irq(priv
->dcrtc
[pipe
], VSYNC_IRQ_ENA
);
66 static struct drm_ioctl_desc armada_ioctls
[] = {
67 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE
, armada_gem_create_ioctl
,0),
68 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP
, armada_gem_mmap_ioctl
, 0),
69 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE
, armada_gem_pwrite_ioctl
, 0),
72 static void armada_drm_lastclose(struct drm_device
*dev
)
74 armada_fbdev_lastclose(dev
);
77 static const struct file_operations armada_drm_fops
= {
82 .unlocked_ioctl
= drm_ioctl
,
85 .release
= drm_release
,
88 static struct drm_driver armada_drm_driver
= {
89 .lastclose
= armada_drm_lastclose
,
90 .get_vblank_counter
= drm_vblank_no_hw_counter
,
91 .enable_vblank
= armada_drm_enable_vblank
,
92 .disable_vblank
= armada_drm_disable_vblank
,
93 .gem_free_object_unlocked
= armada_gem_free_object
,
94 .prime_handle_to_fd
= drm_gem_prime_handle_to_fd
,
95 .prime_fd_to_handle
= drm_gem_prime_fd_to_handle
,
96 .gem_prime_export
= armada_gem_prime_export
,
97 .gem_prime_import
= armada_gem_prime_import
,
98 .dumb_create
= armada_gem_dumb_create
,
99 .dumb_map_offset
= armada_gem_dumb_map_offset
,
100 .dumb_destroy
= armada_gem_dumb_destroy
,
101 .gem_vm_ops
= &armada_gem_vm_ops
,
104 .name
= "armada-drm",
105 .desc
= "Armada SoC DRM",
107 .driver_features
= DRIVER_GEM
| DRIVER_MODESET
|
109 .ioctls
= armada_ioctls
,
110 .fops
= &armada_drm_fops
,
113 static int armada_drm_bind(struct device
*dev
)
115 struct armada_private
*priv
;
116 struct resource
*mem
= NULL
;
120 struct resource
*r
= platform_get_resource(to_platform_device(dev
),
125 /* Resources above 64K are graphics memory */
126 if (resource_size(r
) > SZ_64K
)
135 if (!devm_request_mem_region(dev
, mem
->start
, resource_size(mem
),
139 priv
= kzalloc(sizeof(*priv
), GFP_KERNEL
);
144 * The drm_device structure must be at the start of
145 * armada_private for drm_dev_unref() to work correctly.
147 BUILD_BUG_ON(offsetof(struct armada_private
, drm
) != 0);
149 ret
= drm_dev_init(&priv
->drm
, &armada_drm_driver
, dev
);
151 dev_err(dev
, "[" DRM_NAME
":%s] drm_dev_init failed: %d\n",
157 priv
->drm
.platformdev
= to_platform_device(dev
);
158 priv
->drm
.dev_private
= priv
;
160 platform_set_drvdata(priv
->drm
.platformdev
, &priv
->drm
);
162 INIT_WORK(&priv
->fb_unref_work
, armada_drm_unref_work
);
163 INIT_KFIFO(priv
->fb_unref
);
165 /* Mode setting support */
166 drm_mode_config_init(&priv
->drm
);
167 priv
->drm
.mode_config
.min_width
= 320;
168 priv
->drm
.mode_config
.min_height
= 200;
171 * With vscale enabled, the maximum width is 1920 due to the
172 * 1920 by 3 lines RAM
174 priv
->drm
.mode_config
.max_width
= 1920;
175 priv
->drm
.mode_config
.max_height
= 2048;
177 priv
->drm
.mode_config
.preferred_depth
= 24;
178 priv
->drm
.mode_config
.funcs
= &armada_drm_mode_config_funcs
;
179 drm_mm_init(&priv
->linear
, mem
->start
, resource_size(mem
));
180 mutex_init(&priv
->linear_lock
);
182 ret
= component_bind_all(dev
, &priv
->drm
);
186 ret
= drm_vblank_init(&priv
->drm
, priv
->drm
.mode_config
.num_crtc
);
190 priv
->drm
.irq_enabled
= true;
192 ret
= armada_fbdev_init(&priv
->drm
);
196 drm_kms_helper_poll_init(&priv
->drm
);
198 ret
= drm_dev_register(&priv
->drm
, 0);
202 #ifdef CONFIG_DEBUG_FS
203 armada_drm_debugfs_init(priv
->drm
.primary
);
206 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
207 armada_drm_driver
.name
, armada_drm_driver
.major
,
208 armada_drm_driver
.minor
, armada_drm_driver
.patchlevel
,
209 armada_drm_driver
.date
, dev_name(dev
),
210 priv
->drm
.primary
->index
);
215 drm_kms_helper_poll_fini(&priv
->drm
);
216 armada_fbdev_fini(&priv
->drm
);
218 component_unbind_all(dev
, &priv
->drm
);
220 drm_mode_config_cleanup(&priv
->drm
);
221 drm_mm_takedown(&priv
->linear
);
222 flush_work(&priv
->fb_unref_work
);
223 drm_dev_unref(&priv
->drm
);
227 static void armada_drm_unbind(struct device
*dev
)
229 struct drm_device
*drm
= dev_get_drvdata(dev
);
230 struct armada_private
*priv
= drm
->dev_private
;
232 drm_kms_helper_poll_fini(&priv
->drm
);
233 armada_fbdev_fini(&priv
->drm
);
235 #ifdef CONFIG_DEBUG_FS
236 armada_drm_debugfs_cleanup(priv
->drm
.primary
);
238 drm_dev_unregister(&priv
->drm
);
240 component_unbind_all(dev
, &priv
->drm
);
242 drm_mode_config_cleanup(&priv
->drm
);
243 drm_mm_takedown(&priv
->linear
);
244 flush_work(&priv
->fb_unref_work
);
246 drm_dev_unref(&priv
->drm
);
249 static int compare_of(struct device
*dev
, void *data
)
251 return dev
->of_node
== data
;
254 static int compare_dev_name(struct device
*dev
, void *data
)
256 const char *name
= data
;
257 return !strcmp(dev_name(dev
), name
);
260 static void armada_add_endpoints(struct device
*dev
,
261 struct component_match
**match
, struct device_node
*port
)
263 struct device_node
*ep
, *remote
;
265 for_each_child_of_node(port
, ep
) {
266 remote
= of_graph_get_remote_port_parent(ep
);
267 if (!remote
|| !of_device_is_available(remote
)) {
270 } else if (!of_device_is_available(remote
->parent
)) {
271 dev_warn(dev
, "parent device of %s is not available\n",
277 drm_of_component_match_add(dev
, match
, compare_of
, remote
);
282 static const struct component_master_ops armada_master_ops
= {
283 .bind
= armada_drm_bind
,
284 .unbind
= armada_drm_unbind
,
287 static int armada_drm_probe(struct platform_device
*pdev
)
289 struct component_match
*match
= NULL
;
290 struct device
*dev
= &pdev
->dev
;
293 ret
= drm_of_component_probe(dev
, compare_dev_name
, &armada_master_ops
);
297 if (dev
->platform_data
) {
298 char **devices
= dev
->platform_data
;
299 struct device_node
*port
;
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
);
323 return component_master_add_with_match(&pdev
->dev
, &armada_master_ops
,
327 static int armada_drm_remove(struct platform_device
*pdev
)
329 component_master_del(&pdev
->dev
, &armada_master_ops
);
333 static const struct platform_device_id armada_drm_platform_ids
[] = {
335 .name
= "armada-drm",
337 .name
= "armada-510-drm",
341 MODULE_DEVICE_TABLE(platform
, armada_drm_platform_ids
);
343 static struct platform_driver armada_drm_platform_driver
= {
344 .probe
= armada_drm_probe
,
345 .remove
= armada_drm_remove
,
347 .name
= "armada-drm",
349 .id_table
= armada_drm_platform_ids
,
352 static int __init
armada_drm_init(void)
356 armada_drm_driver
.num_ioctls
= ARRAY_SIZE(armada_ioctls
);
358 ret
= platform_driver_register(&armada_lcd_platform_driver
);
361 ret
= platform_driver_register(&armada_drm_platform_driver
);
363 platform_driver_unregister(&armada_lcd_platform_driver
);
366 module_init(armada_drm_init
);
368 static void __exit
armada_drm_exit(void)
370 platform_driver_unregister(&armada_drm_platform_driver
);
371 platform_driver_unregister(&armada_lcd_platform_driver
);
373 module_exit(armada_drm_exit
);
375 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
376 MODULE_DESCRIPTION("Armada DRM Driver");
377 MODULE_LICENSE("GPL");
378 MODULE_ALIAS("platform:armada-drm");