2 * Freescale i.MX drm driver
4 * Copyright (C) 2011 Sascha Hauer, Pengutronix
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
16 #include <linux/component.h>
17 #include <linux/device.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
22 #include <drm/drm_fb_helper.h>
23 #include <drm/drm_crtc_helper.h>
24 #include <drm/drm_gem_cma_helper.h>
25 #include <drm/drm_fb_cma_helper.h>
26 #include <drm/drm_plane_helper.h>
27 #include <drm/drm_of.h>
28 #include <video/imx-ipu-v3.h>
34 struct imx_drm_component
{
35 struct device_node
*of_node
;
36 struct list_head list
;
39 struct imx_drm_device
{
40 struct drm_device
*drm
;
41 struct imx_drm_crtc
*crtc
[MAX_CRTC
];
43 struct drm_fbdev_cma
*fbhelper
;
47 struct drm_crtc
*crtc
;
48 struct imx_drm_crtc_helper_funcs imx_drm_helper_funcs
;
51 #if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
52 static int legacyfb_depth
= 16;
53 module_param(legacyfb_depth
, int, 0444);
56 unsigned int imx_drm_crtc_id(struct imx_drm_crtc
*crtc
)
58 return drm_crtc_index(crtc
->crtc
);
60 EXPORT_SYMBOL_GPL(imx_drm_crtc_id
);
62 static void imx_drm_driver_lastclose(struct drm_device
*drm
)
64 struct imx_drm_device
*imxdrm
= drm
->dev_private
;
66 drm_fbdev_cma_restore_mode(imxdrm
->fbhelper
);
69 static int imx_drm_driver_unload(struct drm_device
*drm
)
71 struct imx_drm_device
*imxdrm
= drm
->dev_private
;
73 drm_kms_helper_poll_fini(drm
);
76 drm_fbdev_cma_fini(imxdrm
->fbhelper
);
78 component_unbind_all(drm
->dev
, drm
);
80 drm_vblank_cleanup(drm
);
81 drm_mode_config_cleanup(drm
);
83 platform_set_drvdata(drm
->platformdev
, NULL
);
88 static struct imx_drm_crtc
*imx_drm_find_crtc(struct drm_crtc
*crtc
)
90 struct imx_drm_device
*imxdrm
= crtc
->dev
->dev_private
;
93 for (i
= 0; i
< MAX_CRTC
; i
++)
94 if (imxdrm
->crtc
[i
] && imxdrm
->crtc
[i
]->crtc
== crtc
)
95 return imxdrm
->crtc
[i
];
100 int imx_drm_set_bus_format_pins(struct drm_encoder
*encoder
, u32 bus_format
,
101 int hsync_pin
, int vsync_pin
)
103 struct imx_drm_crtc_helper_funcs
*helper
;
104 struct imx_drm_crtc
*imx_crtc
;
106 imx_crtc
= imx_drm_find_crtc(encoder
->crtc
);
110 helper
= &imx_crtc
->imx_drm_helper_funcs
;
111 if (helper
->set_interface_pix_fmt
)
112 return helper
->set_interface_pix_fmt(encoder
->crtc
,
113 bus_format
, hsync_pin
, vsync_pin
);
116 EXPORT_SYMBOL_GPL(imx_drm_set_bus_format_pins
);
118 int imx_drm_set_bus_format(struct drm_encoder
*encoder
, u32 bus_format
)
120 return imx_drm_set_bus_format_pins(encoder
, bus_format
, 2, 3);
122 EXPORT_SYMBOL_GPL(imx_drm_set_bus_format
);
124 int imx_drm_crtc_vblank_get(struct imx_drm_crtc
*imx_drm_crtc
)
126 return drm_crtc_vblank_get(imx_drm_crtc
->crtc
);
128 EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get
);
130 void imx_drm_crtc_vblank_put(struct imx_drm_crtc
*imx_drm_crtc
)
132 drm_crtc_vblank_put(imx_drm_crtc
->crtc
);
134 EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put
);
136 void imx_drm_handle_vblank(struct imx_drm_crtc
*imx_drm_crtc
)
138 drm_crtc_handle_vblank(imx_drm_crtc
->crtc
);
140 EXPORT_SYMBOL_GPL(imx_drm_handle_vblank
);
142 static int imx_drm_enable_vblank(struct drm_device
*drm
, unsigned int pipe
)
144 struct imx_drm_device
*imxdrm
= drm
->dev_private
;
145 struct imx_drm_crtc
*imx_drm_crtc
= imxdrm
->crtc
[pipe
];
151 if (!imx_drm_crtc
->imx_drm_helper_funcs
.enable_vblank
)
154 ret
= imx_drm_crtc
->imx_drm_helper_funcs
.enable_vblank(
160 static void imx_drm_disable_vblank(struct drm_device
*drm
, unsigned int pipe
)
162 struct imx_drm_device
*imxdrm
= drm
->dev_private
;
163 struct imx_drm_crtc
*imx_drm_crtc
= imxdrm
->crtc
[pipe
];
168 if (!imx_drm_crtc
->imx_drm_helper_funcs
.disable_vblank
)
171 imx_drm_crtc
->imx_drm_helper_funcs
.disable_vblank(imx_drm_crtc
->crtc
);
174 static const struct file_operations imx_drm_driver_fops
= {
175 .owner
= THIS_MODULE
,
177 .release
= drm_release
,
178 .unlocked_ioctl
= drm_ioctl
,
179 .mmap
= drm_gem_cma_mmap
,
182 .llseek
= noop_llseek
,
185 void imx_drm_connector_destroy(struct drm_connector
*connector
)
187 drm_connector_unregister(connector
);
188 drm_connector_cleanup(connector
);
190 EXPORT_SYMBOL_GPL(imx_drm_connector_destroy
);
192 void imx_drm_encoder_destroy(struct drm_encoder
*encoder
)
194 drm_encoder_cleanup(encoder
);
196 EXPORT_SYMBOL_GPL(imx_drm_encoder_destroy
);
198 static void imx_drm_output_poll_changed(struct drm_device
*drm
)
200 struct imx_drm_device
*imxdrm
= drm
->dev_private
;
202 drm_fbdev_cma_hotplug_event(imxdrm
->fbhelper
);
205 static const struct drm_mode_config_funcs imx_drm_mode_config_funcs
= {
206 .fb_create
= drm_fb_cma_create
,
207 .output_poll_changed
= imx_drm_output_poll_changed
,
211 * Main DRM initialisation. This binds, initialises and registers
212 * with DRM the subcomponents of the driver.
214 static int imx_drm_driver_load(struct drm_device
*drm
, unsigned long flags
)
216 struct imx_drm_device
*imxdrm
;
217 struct drm_connector
*connector
;
220 imxdrm
= devm_kzalloc(drm
->dev
, sizeof(*imxdrm
), GFP_KERNEL
);
226 drm
->dev_private
= imxdrm
;
229 * enable drm irq mode.
230 * - with irq_enabled = true, we can use the vblank feature.
232 * P.S. note that we wouldn't use drm irq handler but
233 * just specific driver own one instead because
234 * drm framework supports only one irq handler and
235 * drivers can well take care of their interrupts
237 drm
->irq_enabled
= true;
240 * set max width and height as default value(4096x4096).
241 * this value would be used to check framebuffer size limitation
242 * at drm_mode_addfb().
244 drm
->mode_config
.min_width
= 64;
245 drm
->mode_config
.min_height
= 64;
246 drm
->mode_config
.max_width
= 4096;
247 drm
->mode_config
.max_height
= 4096;
248 drm
->mode_config
.funcs
= &imx_drm_mode_config_funcs
;
250 drm_mode_config_init(drm
);
252 ret
= drm_vblank_init(drm
, MAX_CRTC
);
256 platform_set_drvdata(drm
->platformdev
, drm
);
258 /* Now try and bind all our sub-components */
259 ret
= component_bind_all(drm
->dev
, drm
);
264 * All components are now added, we can publish the connector sysfs
265 * entries to userspace. This will generate hotplug events and so
266 * userspace will expect to be able to access DRM at this point.
268 list_for_each_entry(connector
, &drm
->mode_config
.connector_list
, head
) {
269 ret
= drm_connector_register(connector
);
272 "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
274 connector
->name
, ret
);
280 * All components are now initialised, so setup the fb helper.
281 * The fb helper takes copies of key hardware information, so the
282 * crtcs/connectors/encoders must not change after this point.
284 #if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
285 if (legacyfb_depth
!= 16 && legacyfb_depth
!= 32) {
286 dev_warn(drm
->dev
, "Invalid legacyfb_depth. Defaulting to 16bpp\n");
289 drm_helper_disable_unused_functions(drm
);
290 imxdrm
->fbhelper
= drm_fbdev_cma_init(drm
, legacyfb_depth
,
291 drm
->mode_config
.num_crtc
, MAX_CRTC
);
292 if (IS_ERR(imxdrm
->fbhelper
)) {
293 ret
= PTR_ERR(imxdrm
->fbhelper
);
294 imxdrm
->fbhelper
= NULL
;
299 drm_kms_helper_poll_init(drm
);
304 component_unbind_all(drm
->dev
, drm
);
306 drm_vblank_cleanup(drm
);
308 drm_mode_config_cleanup(drm
);
314 * imx_drm_add_crtc - add a new crtc
316 int imx_drm_add_crtc(struct drm_device
*drm
, struct drm_crtc
*crtc
,
317 struct imx_drm_crtc
**new_crtc
, struct drm_plane
*primary_plane
,
318 const struct imx_drm_crtc_helper_funcs
*imx_drm_helper_funcs
,
319 struct device_node
*port
)
321 struct imx_drm_device
*imxdrm
= drm
->dev_private
;
322 struct imx_drm_crtc
*imx_drm_crtc
;
325 * The vblank arrays are dimensioned by MAX_CRTC - we can't
326 * pass IDs greater than this to those functions.
328 if (imxdrm
->pipes
>= MAX_CRTC
)
331 if (imxdrm
->drm
->open_count
)
334 imx_drm_crtc
= kzalloc(sizeof(*imx_drm_crtc
), GFP_KERNEL
);
338 imx_drm_crtc
->imx_drm_helper_funcs
= *imx_drm_helper_funcs
;
339 imx_drm_crtc
->crtc
= crtc
;
343 imxdrm
->crtc
[imxdrm
->pipes
++] = imx_drm_crtc
;
345 *new_crtc
= imx_drm_crtc
;
347 drm_crtc_helper_add(crtc
,
348 imx_drm_crtc
->imx_drm_helper_funcs
.crtc_helper_funcs
);
350 drm_crtc_init_with_planes(drm
, crtc
, primary_plane
, NULL
,
351 imx_drm_crtc
->imx_drm_helper_funcs
.crtc_funcs
, NULL
);
355 EXPORT_SYMBOL_GPL(imx_drm_add_crtc
);
358 * imx_drm_remove_crtc - remove a crtc
360 int imx_drm_remove_crtc(struct imx_drm_crtc
*imx_drm_crtc
)
362 struct imx_drm_device
*imxdrm
= imx_drm_crtc
->crtc
->dev
->dev_private
;
363 unsigned int pipe
= drm_crtc_index(imx_drm_crtc
->crtc
);
365 drm_crtc_cleanup(imx_drm_crtc
->crtc
);
367 imxdrm
->crtc
[pipe
] = NULL
;
373 EXPORT_SYMBOL_GPL(imx_drm_remove_crtc
);
375 int imx_drm_encoder_parse_of(struct drm_device
*drm
,
376 struct drm_encoder
*encoder
, struct device_node
*np
)
378 uint32_t crtc_mask
= drm_of_find_possible_crtcs(drm
, np
);
381 * If we failed to find the CRTC(s) which this encoder is
382 * supposed to be connected to, it's because the CRTC has
383 * not been registered yet. Defer probing, and hope that
384 * the required CRTC is added later.
387 return -EPROBE_DEFER
;
389 encoder
->possible_crtcs
= crtc_mask
;
391 /* FIXME: this is the mask of outputs which can clone this output. */
392 encoder
->possible_clones
= ~0;
396 EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of
);
398 static const struct drm_ioctl_desc imx_drm_ioctls
[] = {
402 static struct drm_driver imx_drm_driver
= {
403 .driver_features
= DRIVER_MODESET
| DRIVER_GEM
| DRIVER_PRIME
,
404 .load
= imx_drm_driver_load
,
405 .unload
= imx_drm_driver_unload
,
406 .lastclose
= imx_drm_driver_lastclose
,
407 .set_busid
= drm_platform_set_busid
,
408 .gem_free_object_unlocked
= drm_gem_cma_free_object
,
409 .gem_vm_ops
= &drm_gem_cma_vm_ops
,
410 .dumb_create
= drm_gem_cma_dumb_create
,
411 .dumb_map_offset
= drm_gem_cma_dumb_map_offset
,
412 .dumb_destroy
= drm_gem_dumb_destroy
,
414 .prime_handle_to_fd
= drm_gem_prime_handle_to_fd
,
415 .prime_fd_to_handle
= drm_gem_prime_fd_to_handle
,
416 .gem_prime_import
= drm_gem_prime_import
,
417 .gem_prime_export
= drm_gem_prime_export
,
418 .gem_prime_get_sg_table
= drm_gem_cma_prime_get_sg_table
,
419 .gem_prime_import_sg_table
= drm_gem_cma_prime_import_sg_table
,
420 .gem_prime_vmap
= drm_gem_cma_prime_vmap
,
421 .gem_prime_vunmap
= drm_gem_cma_prime_vunmap
,
422 .gem_prime_mmap
= drm_gem_cma_prime_mmap
,
423 .get_vblank_counter
= drm_vblank_no_hw_counter
,
424 .enable_vblank
= imx_drm_enable_vblank
,
425 .disable_vblank
= imx_drm_disable_vblank
,
426 .ioctls
= imx_drm_ioctls
,
427 .num_ioctls
= ARRAY_SIZE(imx_drm_ioctls
),
428 .fops
= &imx_drm_driver_fops
,
430 .desc
= "i.MX DRM graphics",
437 static int compare_of(struct device
*dev
, void *data
)
439 struct device_node
*np
= data
;
441 /* Special case for DI, dev->of_node may not be set yet */
442 if (strcmp(dev
->driver
->name
, "imx-ipuv3-crtc") == 0) {
443 struct ipu_client_platformdata
*pdata
= dev
->platform_data
;
445 return pdata
->of_node
== np
;
448 /* Special case for LDB, one device for two channels */
449 if (of_node_cmp(np
->name
, "lvds-channel") == 0) {
450 np
= of_get_parent(np
);
454 return dev
->of_node
== np
;
457 static int imx_drm_bind(struct device
*dev
)
459 return drm_platform_init(&imx_drm_driver
, to_platform_device(dev
));
462 static void imx_drm_unbind(struct device
*dev
)
464 drm_put_dev(dev_get_drvdata(dev
));
467 static const struct component_master_ops imx_drm_ops
= {
468 .bind
= imx_drm_bind
,
469 .unbind
= imx_drm_unbind
,
472 static int imx_drm_platform_probe(struct platform_device
*pdev
)
474 int ret
= drm_of_component_probe(&pdev
->dev
, compare_of
, &imx_drm_ops
);
477 ret
= dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(32));
482 static int imx_drm_platform_remove(struct platform_device
*pdev
)
484 component_master_del(&pdev
->dev
, &imx_drm_ops
);
488 #ifdef CONFIG_PM_SLEEP
489 static int imx_drm_suspend(struct device
*dev
)
491 struct drm_device
*drm_dev
= dev_get_drvdata(dev
);
493 /* The drm_dev is NULL before .load hook is called */
497 drm_kms_helper_poll_disable(drm_dev
);
502 static int imx_drm_resume(struct device
*dev
)
504 struct drm_device
*drm_dev
= dev_get_drvdata(dev
);
509 drm_helper_resume_force_mode(drm_dev
);
510 drm_kms_helper_poll_enable(drm_dev
);
516 static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops
, imx_drm_suspend
, imx_drm_resume
);
518 static const struct of_device_id imx_drm_dt_ids
[] = {
519 { .compatible
= "fsl,imx-display-subsystem", },
522 MODULE_DEVICE_TABLE(of
, imx_drm_dt_ids
);
524 static struct platform_driver imx_drm_pdrv
= {
525 .probe
= imx_drm_platform_probe
,
526 .remove
= imx_drm_platform_remove
,
529 .pm
= &imx_drm_pm_ops
,
530 .of_match_table
= imx_drm_dt_ids
,
533 module_platform_driver(imx_drm_pdrv
);
535 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
536 MODULE_DESCRIPTION("i.MX drm driver core");
537 MODULE_LICENSE("GPL");