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 drm_mode_config_init(drm_dev
);
161 rockchip_drm_mode_config_init(drm_dev
);
163 dev
->dma_parms
= devm_kzalloc(dev
, sizeof(*dev
->dma_parms
),
165 if (!dev
->dma_parms
) {
167 goto err_config_cleanup
;
170 if (is_support_iommu
) {
171 /* TODO(djkurtz): fetch the mapping start/size from somewhere */
172 mapping
= arm_iommu_create_mapping(&platform_bus_type
,
175 if (IS_ERR(mapping
)) {
176 ret
= PTR_ERR(mapping
);
177 goto err_config_cleanup
;
180 ret
= dma_set_mask_and_coherent(dev
, DMA_BIT_MASK(32));
182 goto err_release_mapping
;
184 dma_set_max_seg_size(dev
, DMA_BIT_MASK(32));
186 ret
= arm_iommu_attach_device(dev
, mapping
);
188 goto err_release_mapping
;
191 /* Try to bind all sub drivers. */
192 ret
= component_bind_all(dev
, drm_dev
);
194 goto err_detach_device
;
196 /* init kms poll for handling hpd */
197 drm_kms_helper_poll_init(drm_dev
);
200 * enable drm irq mode.
201 * - with irq_enabled = true, we can use the vblank feature.
203 drm_dev
->irq_enabled
= true;
205 ret
= drm_vblank_init(drm_dev
, ROCKCHIP_MAX_CRTC
);
207 goto err_kms_helper_poll_fini
;
209 drm_mode_config_reset(drm_dev
);
211 ret
= rockchip_drm_fbdev_init(drm_dev
);
213 goto err_vblank_cleanup
;
215 ret
= drm_dev_register(drm_dev
, 0);
219 if (is_support_iommu
)
220 arm_iommu_release_mapping(mapping
);
223 rockchip_drm_fbdev_fini(drm_dev
);
225 drm_vblank_cleanup(drm_dev
);
226 err_kms_helper_poll_fini
:
227 drm_kms_helper_poll_fini(drm_dev
);
228 component_unbind_all(dev
, drm_dev
);
230 if (is_support_iommu
)
231 arm_iommu_detach_device(dev
);
233 if (is_support_iommu
)
234 arm_iommu_release_mapping(mapping
);
236 drm_mode_config_cleanup(drm_dev
);
237 drm_dev
->dev_private
= NULL
;
239 drm_dev_unref(drm_dev
);
243 static void rockchip_drm_unbind(struct device
*dev
)
245 struct drm_device
*drm_dev
= dev_get_drvdata(dev
);
247 rockchip_drm_fbdev_fini(drm_dev
);
248 drm_vblank_cleanup(drm_dev
);
249 drm_kms_helper_poll_fini(drm_dev
);
250 component_unbind_all(dev
, drm_dev
);
251 if (is_support_iommu
)
252 arm_iommu_detach_device(dev
);
253 drm_mode_config_cleanup(drm_dev
);
254 drm_dev
->dev_private
= NULL
;
255 drm_dev_unregister(drm_dev
);
256 drm_dev_unref(drm_dev
);
257 dev_set_drvdata(dev
, NULL
);
260 static void rockchip_drm_lastclose(struct drm_device
*dev
)
262 struct rockchip_drm_private
*priv
= dev
->dev_private
;
264 drm_fb_helper_restore_fbdev_mode_unlocked(&priv
->fbdev_helper
);
267 static const struct file_operations rockchip_drm_driver_fops
= {
268 .owner
= THIS_MODULE
,
270 .mmap
= rockchip_gem_mmap
,
273 .unlocked_ioctl
= drm_ioctl
,
275 .compat_ioctl
= drm_compat_ioctl
,
277 .release
= drm_release
,
280 static struct drm_driver rockchip_drm_driver
= {
281 .driver_features
= DRIVER_MODESET
| DRIVER_GEM
|
282 DRIVER_PRIME
| DRIVER_ATOMIC
,
283 .lastclose
= rockchip_drm_lastclose
,
284 .get_vblank_counter
= drm_vblank_no_hw_counter
,
285 .enable_vblank
= rockchip_drm_crtc_enable_vblank
,
286 .disable_vblank
= rockchip_drm_crtc_disable_vblank
,
287 .gem_vm_ops
= &drm_gem_cma_vm_ops
,
288 .gem_free_object_unlocked
= rockchip_gem_free_object
,
289 .dumb_create
= rockchip_gem_dumb_create
,
290 .dumb_map_offset
= rockchip_gem_dumb_map_offset
,
291 .dumb_destroy
= drm_gem_dumb_destroy
,
292 .prime_handle_to_fd
= drm_gem_prime_handle_to_fd
,
293 .prime_fd_to_handle
= drm_gem_prime_fd_to_handle
,
294 .gem_prime_import
= drm_gem_prime_import
,
295 .gem_prime_export
= drm_gem_prime_export
,
296 .gem_prime_get_sg_table
= rockchip_gem_prime_get_sg_table
,
297 .gem_prime_vmap
= rockchip_gem_prime_vmap
,
298 .gem_prime_vunmap
= rockchip_gem_prime_vunmap
,
299 .gem_prime_mmap
= rockchip_gem_mmap_buf
,
300 .fops
= &rockchip_drm_driver_fops
,
304 .major
= DRIVER_MAJOR
,
305 .minor
= DRIVER_MINOR
,
308 #ifdef CONFIG_PM_SLEEP
309 void rockchip_drm_fb_suspend(struct drm_device
*drm
)
311 struct rockchip_drm_private
*priv
= drm
->dev_private
;
314 drm_fb_helper_set_suspend(&priv
->fbdev_helper
, 1);
318 void rockchip_drm_fb_resume(struct drm_device
*drm
)
320 struct rockchip_drm_private
*priv
= drm
->dev_private
;
323 drm_fb_helper_set_suspend(&priv
->fbdev_helper
, 0);
327 static int rockchip_drm_sys_suspend(struct device
*dev
)
329 struct drm_device
*drm
= dev_get_drvdata(dev
);
330 struct rockchip_drm_private
*priv
= drm
->dev_private
;
332 drm_kms_helper_poll_disable(drm
);
333 rockchip_drm_fb_suspend(drm
);
335 priv
->state
= drm_atomic_helper_suspend(drm
);
336 if (IS_ERR(priv
->state
)) {
337 rockchip_drm_fb_resume(drm
);
338 drm_kms_helper_poll_enable(drm
);
339 return PTR_ERR(priv
->state
);
345 static int rockchip_drm_sys_resume(struct device
*dev
)
347 struct drm_device
*drm
= dev_get_drvdata(dev
);
348 struct rockchip_drm_private
*priv
= drm
->dev_private
;
350 drm_atomic_helper_resume(drm
, priv
->state
);
351 rockchip_drm_fb_resume(drm
);
352 drm_kms_helper_poll_enable(drm
);
358 static const struct dev_pm_ops rockchip_drm_pm_ops
= {
359 SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend
,
360 rockchip_drm_sys_resume
)
363 static int compare_of(struct device
*dev
, void *data
)
365 struct device_node
*np
= data
;
367 return dev
->of_node
== np
;
370 static void rockchip_add_endpoints(struct device
*dev
,
371 struct component_match
**match
,
372 struct device_node
*port
)
374 struct device_node
*ep
, *remote
;
376 for_each_child_of_node(port
, ep
) {
377 remote
= of_graph_get_remote_port_parent(ep
);
378 if (!remote
|| !of_device_is_available(remote
)) {
381 } else if (!of_device_is_available(remote
->parent
)) {
382 dev_warn(dev
, "parent device of %s is not available\n",
388 component_match_add(dev
, match
, compare_of
, remote
);
393 static const struct component_master_ops rockchip_drm_ops
= {
394 .bind
= rockchip_drm_bind
,
395 .unbind
= rockchip_drm_unbind
,
398 static int rockchip_drm_platform_probe(struct platform_device
*pdev
)
400 struct device
*dev
= &pdev
->dev
;
401 struct component_match
*match
= NULL
;
402 struct device_node
*np
= dev
->of_node
;
403 struct device_node
*port
;
409 * Bind the crtc ports first, so that
410 * drm_of_find_possible_crtcs called from encoder .bind callbacks
414 struct device_node
*iommu
;
416 port
= of_parse_phandle(np
, "ports", i
);
420 if (!of_device_is_available(port
->parent
)) {
425 iommu
= of_parse_phandle(port
->parent
, "iommus", 0);
426 if (!iommu
|| !of_device_is_available(iommu
->parent
)) {
427 dev_dbg(dev
, "no iommu attached for %s, using non-iommu buffers\n",
428 port
->parent
->full_name
);
430 * if there is a crtc not support iommu, force set all
431 * crtc use non-iommu buffer.
433 is_support_iommu
= false;
437 component_match_add(dev
, &match
, compare_of
, port
->parent
);
442 dev_err(dev
, "missing 'ports' property\n");
447 dev_err(dev
, "No available vop found for display-subsystem.\n");
451 * For each bound crtc, bind the encoders attached to its
455 port
= of_parse_phandle(np
, "ports", i
);
459 if (!of_device_is_available(port
->parent
)) {
464 rockchip_add_endpoints(dev
, &match
, port
);
468 return component_master_add_with_match(dev
, &rockchip_drm_ops
, match
);
471 static int rockchip_drm_platform_remove(struct platform_device
*pdev
)
473 component_master_del(&pdev
->dev
, &rockchip_drm_ops
);
478 static const struct of_device_id rockchip_drm_dt_ids
[] = {
479 { .compatible
= "rockchip,display-subsystem", },
482 MODULE_DEVICE_TABLE(of
, rockchip_drm_dt_ids
);
484 static struct platform_driver rockchip_drm_platform_driver
= {
485 .probe
= rockchip_drm_platform_probe
,
486 .remove
= rockchip_drm_platform_remove
,
488 .name
= "rockchip-drm",
489 .of_match_table
= rockchip_drm_dt_ids
,
490 .pm
= &rockchip_drm_pm_ops
,
494 module_platform_driver(rockchip_drm_platform_driver
);
496 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
497 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
498 MODULE_LICENSE("GPL v2");