2 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
3 * Author:Mark Yao <mark.yao@rock-chips.com>
5 * based on exynos_drm_drv.c
7 * This software is licensed under the terms of the GNU General Public
8 * License version 2, as published by the Free Software Foundation, and
9 * may be copied, distributed, and modified under those terms.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
17 #include <asm/dma-iommu.h>
20 #include <drm/drm_crtc_helper.h>
21 #include <drm/drm_fb_helper.h>
22 #include <drm/drm_gem_cma_helper.h>
23 #include <linux/dma-mapping.h>
24 #include <linux/pm_runtime.h>
25 #include <linux/module.h>
26 #include <linux/of_graph.h>
27 #include <linux/component.h>
28 #include <linux/console.h>
30 #include "rockchip_drm_drv.h"
31 #include "rockchip_drm_fb.h"
32 #include "rockchip_drm_fbdev.h"
33 #include "rockchip_drm_gem.h"
35 #define DRIVER_NAME "rockchip"
36 #define DRIVER_DESC "RockChip Soc DRM"
37 #define DRIVER_DATE "20140818"
38 #define DRIVER_MAJOR 1
39 #define DRIVER_MINOR 0
41 static bool is_support_iommu
= true;
42 static struct drm_driver rockchip_drm_driver
;
45 * Attach a (component) device to the shared drm dma mapping from master drm
46 * device. This is used by the VOPs to map GEM buffers to a common DMA
49 int rockchip_drm_dma_attach_device(struct drm_device
*drm_dev
,
52 struct dma_iommu_mapping
*mapping
= drm_dev
->dev
->archdata
.mapping
;
55 if (!is_support_iommu
)
58 ret
= dma_set_coherent_mask(dev
, DMA_BIT_MASK(32));
62 dma_set_max_seg_size(dev
, DMA_BIT_MASK(32));
64 return arm_iommu_attach_device(dev
, mapping
);
67 void rockchip_drm_dma_detach_device(struct drm_device
*drm_dev
,
70 if (!is_support_iommu
)
73 arm_iommu_detach_device(dev
);
76 int rockchip_register_crtc_funcs(struct drm_crtc
*crtc
,
77 const struct rockchip_crtc_funcs
*crtc_funcs
)
79 int pipe
= drm_crtc_index(crtc
);
80 struct rockchip_drm_private
*priv
= crtc
->dev
->dev_private
;
82 if (pipe
>= ROCKCHIP_MAX_CRTC
)
85 priv
->crtc_funcs
[pipe
] = crtc_funcs
;
90 void rockchip_unregister_crtc_funcs(struct drm_crtc
*crtc
)
92 int pipe
= drm_crtc_index(crtc
);
93 struct rockchip_drm_private
*priv
= crtc
->dev
->dev_private
;
95 if (pipe
>= ROCKCHIP_MAX_CRTC
)
98 priv
->crtc_funcs
[pipe
] = NULL
;
101 static struct drm_crtc
*rockchip_crtc_from_pipe(struct drm_device
*drm
,
104 struct drm_crtc
*crtc
;
107 list_for_each_entry(crtc
, &drm
->mode_config
.crtc_list
, head
)
114 static int rockchip_drm_crtc_enable_vblank(struct drm_device
*dev
,
117 struct rockchip_drm_private
*priv
= dev
->dev_private
;
118 struct drm_crtc
*crtc
= rockchip_crtc_from_pipe(dev
, pipe
);
120 if (crtc
&& priv
->crtc_funcs
[pipe
] &&
121 priv
->crtc_funcs
[pipe
]->enable_vblank
)
122 return priv
->crtc_funcs
[pipe
]->enable_vblank(crtc
);
127 static void rockchip_drm_crtc_disable_vblank(struct drm_device
*dev
,
130 struct rockchip_drm_private
*priv
= dev
->dev_private
;
131 struct drm_crtc
*crtc
= rockchip_crtc_from_pipe(dev
, pipe
);
133 if (crtc
&& priv
->crtc_funcs
[pipe
] &&
134 priv
->crtc_funcs
[pipe
]->enable_vblank
)
135 priv
->crtc_funcs
[pipe
]->disable_vblank(crtc
);
138 static int rockchip_drm_bind(struct device
*dev
)
140 struct drm_device
*drm_dev
;
141 struct rockchip_drm_private
*private;
142 struct dma_iommu_mapping
*mapping
= NULL
;
145 drm_dev
= drm_dev_alloc(&rockchip_drm_driver
, dev
);
149 dev_set_drvdata(dev
, drm_dev
);
151 private = devm_kzalloc(drm_dev
->dev
, sizeof(*private), GFP_KERNEL
);
157 drm_dev
->dev_private
= private;
159 INIT_LIST_HEAD(&private->psr_list
);
160 spin_lock_init(&private->psr_list_lock
);
162 drm_mode_config_init(drm_dev
);
164 rockchip_drm_mode_config_init(drm_dev
);
166 dev
->dma_parms
= devm_kzalloc(dev
, sizeof(*dev
->dma_parms
),
168 if (!dev
->dma_parms
) {
170 goto err_config_cleanup
;
173 if (is_support_iommu
) {
174 /* TODO(djkurtz): fetch the mapping start/size from somewhere */
175 mapping
= arm_iommu_create_mapping(&platform_bus_type
,
178 if (IS_ERR(mapping
)) {
179 ret
= PTR_ERR(mapping
);
180 goto err_config_cleanup
;
183 ret
= dma_set_mask_and_coherent(dev
, DMA_BIT_MASK(32));
185 goto err_release_mapping
;
187 dma_set_max_seg_size(dev
, DMA_BIT_MASK(32));
189 ret
= arm_iommu_attach_device(dev
, mapping
);
191 goto err_release_mapping
;
194 /* Try to bind all sub drivers. */
195 ret
= component_bind_all(dev
, drm_dev
);
197 goto err_detach_device
;
199 /* init kms poll for handling hpd */
200 drm_kms_helper_poll_init(drm_dev
);
203 * enable drm irq mode.
204 * - with irq_enabled = true, we can use the vblank feature.
206 drm_dev
->irq_enabled
= true;
208 ret
= drm_vblank_init(drm_dev
, ROCKCHIP_MAX_CRTC
);
210 goto err_kms_helper_poll_fini
;
212 drm_mode_config_reset(drm_dev
);
214 ret
= rockchip_drm_fbdev_init(drm_dev
);
216 goto err_vblank_cleanup
;
218 ret
= drm_dev_register(drm_dev
, 0);
222 if (is_support_iommu
)
223 arm_iommu_release_mapping(mapping
);
226 rockchip_drm_fbdev_fini(drm_dev
);
228 drm_vblank_cleanup(drm_dev
);
229 err_kms_helper_poll_fini
:
230 drm_kms_helper_poll_fini(drm_dev
);
231 component_unbind_all(dev
, drm_dev
);
233 if (is_support_iommu
)
234 arm_iommu_detach_device(dev
);
236 if (is_support_iommu
)
237 arm_iommu_release_mapping(mapping
);
239 drm_mode_config_cleanup(drm_dev
);
240 drm_dev
->dev_private
= NULL
;
242 drm_dev_unref(drm_dev
);
246 static void rockchip_drm_unbind(struct device
*dev
)
248 struct drm_device
*drm_dev
= dev_get_drvdata(dev
);
250 rockchip_drm_fbdev_fini(drm_dev
);
251 drm_vblank_cleanup(drm_dev
);
252 drm_kms_helper_poll_fini(drm_dev
);
253 component_unbind_all(dev
, drm_dev
);
254 if (is_support_iommu
)
255 arm_iommu_detach_device(dev
);
256 drm_mode_config_cleanup(drm_dev
);
257 drm_dev
->dev_private
= NULL
;
258 drm_dev_unregister(drm_dev
);
259 drm_dev_unref(drm_dev
);
260 dev_set_drvdata(dev
, NULL
);
263 static void rockchip_drm_lastclose(struct drm_device
*dev
)
265 struct rockchip_drm_private
*priv
= dev
->dev_private
;
267 drm_fb_helper_restore_fbdev_mode_unlocked(&priv
->fbdev_helper
);
270 static const struct file_operations rockchip_drm_driver_fops
= {
271 .owner
= THIS_MODULE
,
273 .mmap
= rockchip_gem_mmap
,
276 .unlocked_ioctl
= drm_ioctl
,
278 .compat_ioctl
= drm_compat_ioctl
,
280 .release
= drm_release
,
283 static struct drm_driver rockchip_drm_driver
= {
284 .driver_features
= DRIVER_MODESET
| DRIVER_GEM
|
285 DRIVER_PRIME
| DRIVER_ATOMIC
,
286 .lastclose
= rockchip_drm_lastclose
,
287 .get_vblank_counter
= drm_vblank_no_hw_counter
,
288 .enable_vblank
= rockchip_drm_crtc_enable_vblank
,
289 .disable_vblank
= rockchip_drm_crtc_disable_vblank
,
290 .gem_vm_ops
= &drm_gem_cma_vm_ops
,
291 .gem_free_object_unlocked
= rockchip_gem_free_object
,
292 .dumb_create
= rockchip_gem_dumb_create
,
293 .dumb_map_offset
= rockchip_gem_dumb_map_offset
,
294 .dumb_destroy
= drm_gem_dumb_destroy
,
295 .prime_handle_to_fd
= drm_gem_prime_handle_to_fd
,
296 .prime_fd_to_handle
= drm_gem_prime_fd_to_handle
,
297 .gem_prime_import
= drm_gem_prime_import
,
298 .gem_prime_export
= drm_gem_prime_export
,
299 .gem_prime_get_sg_table
= rockchip_gem_prime_get_sg_table
,
300 .gem_prime_vmap
= rockchip_gem_prime_vmap
,
301 .gem_prime_vunmap
= rockchip_gem_prime_vunmap
,
302 .gem_prime_mmap
= rockchip_gem_mmap_buf
,
303 .fops
= &rockchip_drm_driver_fops
,
307 .major
= DRIVER_MAJOR
,
308 .minor
= DRIVER_MINOR
,
311 #ifdef CONFIG_PM_SLEEP
312 void rockchip_drm_fb_suspend(struct drm_device
*drm
)
314 struct rockchip_drm_private
*priv
= drm
->dev_private
;
317 drm_fb_helper_set_suspend(&priv
->fbdev_helper
, 1);
321 void rockchip_drm_fb_resume(struct drm_device
*drm
)
323 struct rockchip_drm_private
*priv
= drm
->dev_private
;
326 drm_fb_helper_set_suspend(&priv
->fbdev_helper
, 0);
330 static int rockchip_drm_sys_suspend(struct device
*dev
)
332 struct drm_device
*drm
= dev_get_drvdata(dev
);
333 struct rockchip_drm_private
*priv
= drm
->dev_private
;
335 drm_kms_helper_poll_disable(drm
);
336 rockchip_drm_fb_suspend(drm
);
338 priv
->state
= drm_atomic_helper_suspend(drm
);
339 if (IS_ERR(priv
->state
)) {
340 rockchip_drm_fb_resume(drm
);
341 drm_kms_helper_poll_enable(drm
);
342 return PTR_ERR(priv
->state
);
348 static int rockchip_drm_sys_resume(struct device
*dev
)
350 struct drm_device
*drm
= dev_get_drvdata(dev
);
351 struct rockchip_drm_private
*priv
= drm
->dev_private
;
353 drm_atomic_helper_resume(drm
, priv
->state
);
354 rockchip_drm_fb_resume(drm
);
355 drm_kms_helper_poll_enable(drm
);
361 static const struct dev_pm_ops rockchip_drm_pm_ops
= {
362 SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend
,
363 rockchip_drm_sys_resume
)
366 static int compare_of(struct device
*dev
, void *data
)
368 struct device_node
*np
= data
;
370 return dev
->of_node
== np
;
373 static void rockchip_add_endpoints(struct device
*dev
,
374 struct component_match
**match
,
375 struct device_node
*port
)
377 struct device_node
*ep
, *remote
;
379 for_each_child_of_node(port
, ep
) {
380 remote
= of_graph_get_remote_port_parent(ep
);
381 if (!remote
|| !of_device_is_available(remote
)) {
384 } else if (!of_device_is_available(remote
->parent
)) {
385 dev_warn(dev
, "parent device of %s is not available\n",
391 component_match_add(dev
, match
, compare_of
, remote
);
396 static const struct component_master_ops rockchip_drm_ops
= {
397 .bind
= rockchip_drm_bind
,
398 .unbind
= rockchip_drm_unbind
,
401 static int rockchip_drm_platform_probe(struct platform_device
*pdev
)
403 struct device
*dev
= &pdev
->dev
;
404 struct component_match
*match
= NULL
;
405 struct device_node
*np
= dev
->of_node
;
406 struct device_node
*port
;
412 * Bind the crtc ports first, so that
413 * drm_of_find_possible_crtcs called from encoder .bind callbacks
417 struct device_node
*iommu
;
419 port
= of_parse_phandle(np
, "ports", i
);
423 if (!of_device_is_available(port
->parent
)) {
428 iommu
= of_parse_phandle(port
->parent
, "iommus", 0);
429 if (!iommu
|| !of_device_is_available(iommu
->parent
)) {
430 dev_dbg(dev
, "no iommu attached for %s, using non-iommu buffers\n",
431 port
->parent
->full_name
);
433 * if there is a crtc not support iommu, force set all
434 * crtc use non-iommu buffer.
436 is_support_iommu
= false;
440 component_match_add(dev
, &match
, compare_of
, port
->parent
);
445 dev_err(dev
, "missing 'ports' property\n");
450 dev_err(dev
, "No available vop found for display-subsystem.\n");
454 * For each bound crtc, bind the encoders attached to its
458 port
= of_parse_phandle(np
, "ports", i
);
462 if (!of_device_is_available(port
->parent
)) {
467 rockchip_add_endpoints(dev
, &match
, port
);
471 return component_master_add_with_match(dev
, &rockchip_drm_ops
, match
);
474 static int rockchip_drm_platform_remove(struct platform_device
*pdev
)
476 component_master_del(&pdev
->dev
, &rockchip_drm_ops
);
481 static const struct of_device_id rockchip_drm_dt_ids
[] = {
482 { .compatible
= "rockchip,display-subsystem", },
485 MODULE_DEVICE_TABLE(of
, rockchip_drm_dt_ids
);
487 static struct platform_driver rockchip_drm_platform_driver
= {
488 .probe
= rockchip_drm_platform_probe
,
489 .remove
= rockchip_drm_platform_remove
,
491 .name
= "rockchip-drm",
492 .of_match_table
= rockchip_drm_dt_ids
,
493 .pm
= &rockchip_drm_pm_ops
,
497 module_platform_driver(rockchip_drm_platform_driver
);
499 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
500 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
501 MODULE_LICENSE("GPL v2");