xref: /openbmc/linux/drivers/gpu/drm/vc4/vc4_drv.c (revision 722d4f06)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2014-2015 Broadcom
4  * Copyright (C) 2013 Red Hat
5  */
6 
7 /**
8  * DOC: Broadcom VC4 Graphics Driver
9  *
10  * The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a
11  * OpenGL ES 2.0-compatible 3D engine called V3D, and a highly
12  * configurable display output pipeline that supports HDMI, DSI, DPI,
13  * and Composite TV output.
14  *
15  * The 3D engine also has an interface for submitting arbitrary
16  * compute shader-style jobs using the same shader processor as is
17  * used for vertex and fragment shaders in GLES 2.0.  However, given
18  * that the hardware isn't able to expose any standard interfaces like
19  * OpenGL compute shaders or OpenCL, it isn't supported by this
20  * driver.
21  */
22 
23 #include <linux/clk.h>
24 #include <linux/component.h>
25 #include <linux/device.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/io.h>
28 #include <linux/module.h>
29 #include <linux/of_device.h>
30 #include <linux/platform_device.h>
31 #include <linux/pm_runtime.h>
32 
33 #include <drm/drm_aperture.h>
34 #include <drm/drm_atomic_helper.h>
35 #include <drm/drm_drv.h>
36 #include <drm/drm_fbdev_dma.h>
37 #include <drm/drm_vblank.h>
38 
39 #include <soc/bcm2835/raspberrypi-firmware.h>
40 
41 #include "uapi/drm/vc4_drm.h"
42 
43 #include "vc4_drv.h"
44 #include "vc4_regs.h"
45 
46 #define DRIVER_NAME "vc4"
47 #define DRIVER_DESC "Broadcom VC4 graphics"
48 #define DRIVER_DATE "20140616"
49 #define DRIVER_MAJOR 0
50 #define DRIVER_MINOR 0
51 #define DRIVER_PATCHLEVEL 0
52 
53 /* Helper function for mapping the regs on a platform device. */
vc4_ioremap_regs(struct platform_device * pdev,int index)54 void __iomem *vc4_ioremap_regs(struct platform_device *pdev, int index)
55 {
56 	void __iomem *map;
57 
58 	map = devm_platform_ioremap_resource(pdev, index);
59 	if (IS_ERR(map))
60 		return map;
61 
62 	return map;
63 }
64 
vc4_dumb_fixup_args(struct drm_mode_create_dumb * args)65 int vc4_dumb_fixup_args(struct drm_mode_create_dumb *args)
66 {
67 	int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
68 
69 	if (args->pitch < min_pitch)
70 		args->pitch = min_pitch;
71 
72 	if (args->size < args->pitch * args->height)
73 		args->size = args->pitch * args->height;
74 
75 	return 0;
76 }
77 
vc5_dumb_create(struct drm_file * file_priv,struct drm_device * dev,struct drm_mode_create_dumb * args)78 static int vc5_dumb_create(struct drm_file *file_priv,
79 			   struct drm_device *dev,
80 			   struct drm_mode_create_dumb *args)
81 {
82 	int ret;
83 
84 	ret = vc4_dumb_fixup_args(args);
85 	if (ret)
86 		return ret;
87 
88 	return drm_gem_dma_dumb_create_internal(file_priv, dev, args);
89 }
90 
vc4_get_param_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)91 static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
92 			       struct drm_file *file_priv)
93 {
94 	struct vc4_dev *vc4 = to_vc4_dev(dev);
95 	struct drm_vc4_get_param *args = data;
96 	int ret;
97 
98 	if (args->pad != 0)
99 		return -EINVAL;
100 
101 	if (WARN_ON_ONCE(vc4->is_vc5))
102 		return -ENODEV;
103 
104 	if (!vc4->v3d)
105 		return -ENODEV;
106 
107 	switch (args->param) {
108 	case DRM_VC4_PARAM_V3D_IDENT0:
109 		ret = vc4_v3d_pm_get(vc4);
110 		if (ret)
111 			return ret;
112 		args->value = V3D_READ(V3D_IDENT0);
113 		vc4_v3d_pm_put(vc4);
114 		break;
115 	case DRM_VC4_PARAM_V3D_IDENT1:
116 		ret = vc4_v3d_pm_get(vc4);
117 		if (ret)
118 			return ret;
119 		args->value = V3D_READ(V3D_IDENT1);
120 		vc4_v3d_pm_put(vc4);
121 		break;
122 	case DRM_VC4_PARAM_V3D_IDENT2:
123 		ret = vc4_v3d_pm_get(vc4);
124 		if (ret)
125 			return ret;
126 		args->value = V3D_READ(V3D_IDENT2);
127 		vc4_v3d_pm_put(vc4);
128 		break;
129 	case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
130 	case DRM_VC4_PARAM_SUPPORTS_ETC1:
131 	case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
132 	case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
133 	case DRM_VC4_PARAM_SUPPORTS_MADVISE:
134 	case DRM_VC4_PARAM_SUPPORTS_PERFMON:
135 		args->value = true;
136 		break;
137 	default:
138 		DRM_DEBUG("Unknown parameter %d\n", args->param);
139 		return -EINVAL;
140 	}
141 
142 	return 0;
143 }
144 
vc4_open(struct drm_device * dev,struct drm_file * file)145 static int vc4_open(struct drm_device *dev, struct drm_file *file)
146 {
147 	struct vc4_dev *vc4 = to_vc4_dev(dev);
148 	struct vc4_file *vc4file;
149 
150 	if (WARN_ON_ONCE(vc4->is_vc5))
151 		return -ENODEV;
152 
153 	vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
154 	if (!vc4file)
155 		return -ENOMEM;
156 	vc4file->dev = vc4;
157 
158 	vc4_perfmon_open_file(vc4file);
159 	file->driver_priv = vc4file;
160 	return 0;
161 }
162 
vc4_close(struct drm_device * dev,struct drm_file * file)163 static void vc4_close(struct drm_device *dev, struct drm_file *file)
164 {
165 	struct vc4_dev *vc4 = to_vc4_dev(dev);
166 	struct vc4_file *vc4file = file->driver_priv;
167 
168 	if (WARN_ON_ONCE(vc4->is_vc5))
169 		return;
170 
171 	if (vc4file->bin_bo_used)
172 		vc4_v3d_bin_bo_put(vc4);
173 
174 	vc4_perfmon_close_file(vc4file);
175 	kfree(vc4file);
176 }
177 
178 DEFINE_DRM_GEM_FOPS(vc4_drm_fops);
179 
180 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
181 	DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
182 	DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
183 	DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
184 	DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
185 	DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
186 	DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
187 	DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
188 			  DRM_ROOT_ONLY),
189 	DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
190 	DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
191 	DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
192 	DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
193 	DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
194 	DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
195 	DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
196 	DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
197 };
198 
199 const struct drm_driver vc4_drm_driver = {
200 	.driver_features = (DRIVER_MODESET |
201 			    DRIVER_ATOMIC |
202 			    DRIVER_GEM |
203 			    DRIVER_RENDER |
204 			    DRIVER_SYNCOBJ),
205 	.open = vc4_open,
206 	.postclose = vc4_close,
207 
208 #if defined(CONFIG_DEBUG_FS)
209 	.debugfs_init = vc4_debugfs_init,
210 #endif
211 
212 	.gem_create_object = vc4_create_object,
213 
214 	DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(vc4_bo_dumb_create),
215 
216 	.ioctls = vc4_drm_ioctls,
217 	.num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
218 	.fops = &vc4_drm_fops,
219 
220 	.name = DRIVER_NAME,
221 	.desc = DRIVER_DESC,
222 	.date = DRIVER_DATE,
223 	.major = DRIVER_MAJOR,
224 	.minor = DRIVER_MINOR,
225 	.patchlevel = DRIVER_PATCHLEVEL,
226 };
227 
228 const struct drm_driver vc5_drm_driver = {
229 	.driver_features = (DRIVER_MODESET |
230 			    DRIVER_ATOMIC |
231 			    DRIVER_GEM),
232 
233 #if defined(CONFIG_DEBUG_FS)
234 	.debugfs_init = vc4_debugfs_init,
235 #endif
236 
237 	DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(vc5_dumb_create),
238 
239 	.fops = &vc4_drm_fops,
240 
241 	.name = DRIVER_NAME,
242 	.desc = DRIVER_DESC,
243 	.date = DRIVER_DATE,
244 	.major = DRIVER_MAJOR,
245 	.minor = DRIVER_MINOR,
246 	.patchlevel = DRIVER_PATCHLEVEL,
247 };
248 
vc4_match_add_drivers(struct device * dev,struct component_match ** match,struct platform_driver * const * drivers,int count)249 static void vc4_match_add_drivers(struct device *dev,
250 				  struct component_match **match,
251 				  struct platform_driver *const *drivers,
252 				  int count)
253 {
254 	int i;
255 
256 	for (i = 0; i < count; i++) {
257 		struct device_driver *drv = &drivers[i]->driver;
258 		struct device *p = NULL, *d;
259 
260 		while ((d = platform_find_device_by_driver(p, drv))) {
261 			put_device(p);
262 			component_match_add(dev, match, component_compare_dev, d);
263 			p = d;
264 		}
265 		put_device(p);
266 	}
267 }
268 
vc4_component_unbind_all(void * ptr)269 static void vc4_component_unbind_all(void *ptr)
270 {
271 	struct vc4_dev *vc4 = ptr;
272 
273 	component_unbind_all(vc4->dev, &vc4->base);
274 }
275 
276 static const struct of_device_id vc4_dma_range_matches[] = {
277 	{ .compatible = "brcm,bcm2711-hvs" },
278 	{ .compatible = "brcm,bcm2835-hvs" },
279 	{ .compatible = "brcm,bcm2835-v3d" },
280 	{ .compatible = "brcm,cygnus-v3d" },
281 	{ .compatible = "brcm,vc4-v3d" },
282 	{}
283 };
284 
vc4_drm_bind(struct device * dev)285 static int vc4_drm_bind(struct device *dev)
286 {
287 	struct platform_device *pdev = to_platform_device(dev);
288 	const struct drm_driver *driver;
289 	struct rpi_firmware *firmware = NULL;
290 	struct drm_device *drm;
291 	struct vc4_dev *vc4;
292 	struct device_node *node;
293 	struct drm_crtc *crtc;
294 	bool is_vc5;
295 	int ret = 0;
296 
297 	dev->coherent_dma_mask = DMA_BIT_MASK(32);
298 
299 	is_vc5 = of_device_is_compatible(dev->of_node, "brcm,bcm2711-vc5");
300 	if (is_vc5)
301 		driver = &vc5_drm_driver;
302 	else
303 		driver = &vc4_drm_driver;
304 
305 	node = of_find_matching_node_and_match(NULL, vc4_dma_range_matches,
306 					       NULL);
307 	if (node) {
308 		ret = of_dma_configure(dev, node, true);
309 		of_node_put(node);
310 
311 		if (ret)
312 			return ret;
313 	}
314 
315 	vc4 = devm_drm_dev_alloc(dev, driver, struct vc4_dev, base);
316 	if (IS_ERR(vc4))
317 		return PTR_ERR(vc4);
318 	vc4->is_vc5 = is_vc5;
319 	vc4->dev = dev;
320 
321 	drm = &vc4->base;
322 	platform_set_drvdata(pdev, drm);
323 
324 	if (!is_vc5) {
325 		ret = drmm_mutex_init(drm, &vc4->bin_bo_lock);
326 		if (ret)
327 			return ret;
328 
329 		ret = vc4_bo_cache_init(drm);
330 		if (ret)
331 			return ret;
332 	}
333 
334 	ret = drmm_mode_config_init(drm);
335 	if (ret)
336 		return ret;
337 
338 	if (!is_vc5) {
339 		ret = vc4_gem_init(drm);
340 		if (ret)
341 			return ret;
342 	}
343 
344 	node = of_find_compatible_node(NULL, NULL, "raspberrypi,bcm2835-firmware");
345 	if (node) {
346 		firmware = rpi_firmware_get(node);
347 		of_node_put(node);
348 
349 		if (!firmware)
350 			return -EPROBE_DEFER;
351 	}
352 
353 	ret = drm_aperture_remove_framebuffers(driver);
354 	if (ret)
355 		return ret;
356 
357 	if (firmware) {
358 		ret = rpi_firmware_property(firmware,
359 					    RPI_FIRMWARE_NOTIFY_DISPLAY_DONE,
360 					    NULL, 0);
361 		if (ret)
362 			drm_warn(drm, "Couldn't stop firmware display driver: %d\n", ret);
363 
364 		rpi_firmware_put(firmware);
365 	}
366 
367 	ret = component_bind_all(dev, drm);
368 	if (ret)
369 		return ret;
370 
371 	ret = devm_add_action_or_reset(dev, vc4_component_unbind_all, vc4);
372 	if (ret)
373 		return ret;
374 
375 	ret = vc4_plane_create_additional_planes(drm);
376 	if (ret)
377 		goto unbind_all;
378 
379 	ret = vc4_kms_load(drm);
380 	if (ret < 0)
381 		goto unbind_all;
382 
383 	drm_for_each_crtc(crtc, drm)
384 		vc4_crtc_disable_at_boot(crtc);
385 
386 	ret = drm_dev_register(drm, 0);
387 	if (ret < 0)
388 		goto unbind_all;
389 
390 	drm_fbdev_dma_setup(drm, 16);
391 
392 	return 0;
393 
394 unbind_all:
395 	return ret;
396 }
397 
vc4_drm_unbind(struct device * dev)398 static void vc4_drm_unbind(struct device *dev)
399 {
400 	struct drm_device *drm = dev_get_drvdata(dev);
401 
402 	drm_dev_unplug(drm);
403 	drm_atomic_helper_shutdown(drm);
404 }
405 
406 static const struct component_master_ops vc4_drm_ops = {
407 	.bind = vc4_drm_bind,
408 	.unbind = vc4_drm_unbind,
409 };
410 
411 /*
412  * This list determines the binding order of our components, and we have
413  * a few constraints:
414  *   - The TXP driver needs to be bound before the PixelValves (CRTC)
415  *     but after the HVS to set the possible_crtc field properly
416  *   - The HDMI driver needs to be bound after the HVS so that we can
417  *     lookup the HVS maximum core clock rate and figure out if we
418  *     support 4kp60 or not.
419  */
420 static struct platform_driver *const component_drivers[] = {
421 	&vc4_hvs_driver,
422 	&vc4_hdmi_driver,
423 	&vc4_vec_driver,
424 	&vc4_dpi_driver,
425 	&vc4_dsi_driver,
426 	&vc4_txp_driver,
427 	&vc4_crtc_driver,
428 	&vc4_v3d_driver,
429 };
430 
vc4_platform_drm_probe(struct platform_device * pdev)431 static int vc4_platform_drm_probe(struct platform_device *pdev)
432 {
433 	struct component_match *match = NULL;
434 	struct device *dev = &pdev->dev;
435 
436 	vc4_match_add_drivers(dev, &match,
437 			      component_drivers, ARRAY_SIZE(component_drivers));
438 
439 	return component_master_add_with_match(dev, &vc4_drm_ops, match);
440 }
441 
vc4_platform_drm_remove(struct platform_device * pdev)442 static void vc4_platform_drm_remove(struct platform_device *pdev)
443 {
444 	component_master_del(&pdev->dev, &vc4_drm_ops);
445 }
446 
447 static const struct of_device_id vc4_of_match[] = {
448 	{ .compatible = "brcm,bcm2711-vc5", },
449 	{ .compatible = "brcm,bcm2835-vc4", },
450 	{ .compatible = "brcm,cygnus-vc4", },
451 	{},
452 };
453 MODULE_DEVICE_TABLE(of, vc4_of_match);
454 
455 static struct platform_driver vc4_platform_driver = {
456 	.probe		= vc4_platform_drm_probe,
457 	.remove_new	= vc4_platform_drm_remove,
458 	.driver		= {
459 		.name	= "vc4-drm",
460 		.of_match_table = vc4_of_match,
461 	},
462 };
463 
vc4_drm_register(void)464 static int __init vc4_drm_register(void)
465 {
466 	int ret;
467 
468 	if (drm_firmware_drivers_only())
469 		return -ENODEV;
470 
471 	ret = platform_register_drivers(component_drivers,
472 					ARRAY_SIZE(component_drivers));
473 	if (ret)
474 		return ret;
475 
476 	ret = platform_driver_register(&vc4_platform_driver);
477 	if (ret)
478 		platform_unregister_drivers(component_drivers,
479 					    ARRAY_SIZE(component_drivers));
480 
481 	return ret;
482 }
483 
vc4_drm_unregister(void)484 static void __exit vc4_drm_unregister(void)
485 {
486 	platform_unregister_drivers(component_drivers,
487 				    ARRAY_SIZE(component_drivers));
488 	platform_driver_unregister(&vc4_platform_driver);
489 }
490 
491 module_init(vc4_drm_register);
492 module_exit(vc4_drm_unregister);
493 
494 MODULE_ALIAS("platform:vc4-drm");
495 MODULE_SOFTDEP("pre: snd-soc-hdmi-codec");
496 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
497 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
498 MODULE_LICENSE("GPL v2");
499