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  1/*
  2 * rcar_du_drv.c  --  R-Car Display Unit DRM driver
  3 *
  4 * Copyright (C) 2013-2015 Renesas Electronics Corporation
  5 *
  6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
  7 *
  8 * This program is free software; you can redistribute it and/or modify
  9 * it under the terms of the GNU General Public License as published by
 10 * the Free Software Foundation; either version 2 of the License, or
 11 * (at your option) any later version.
 12 */
 13
 14#include <linux/clk.h>
 15#include <linux/io.h>
 16#include <linux/mm.h>
 17#include <linux/module.h>
 18#include <linux/of_device.h>
 19#include <linux/platform_device.h>
 20#include <linux/pm.h>
 21#include <linux/slab.h>
 22#include <linux/wait.h>
 23
 24#include <drm/drmP.h>
 25#include <drm/drm_atomic_helper.h>
 26#include <drm/drm_crtc_helper.h>
 27#include <drm/drm_fb_cma_helper.h>
 28#include <drm/drm_gem_cma_helper.h>
 29
 30#include "rcar_du_drv.h"
 31#include "rcar_du_kms.h"
 32#include "rcar_du_of.h"
 33#include "rcar_du_regs.h"
 34
 35/* -----------------------------------------------------------------------------
 36 * Device Information
 37 */
 38
 39static const struct rcar_du_device_info rzg1_du_r8a7743_info = {
 40	.gen = 2,
 41	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 42		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
 43	.num_crtcs = 2,
 44	.routes = {
 45		/*
 46		 * R8A7743 has one RGB output and one LVDS output
 47		 */
 48		[RCAR_DU_OUTPUT_DPAD0] = {
 49			.possible_crtcs = BIT(1) | BIT(0),
 50			.port = 0,
 51		},
 52		[RCAR_DU_OUTPUT_LVDS0] = {
 53			.possible_crtcs = BIT(0),
 54			.port = 1,
 55		},
 56	},
 57	.num_lvds = 1,
 58};
 59
 60static const struct rcar_du_device_info rzg1_du_r8a7745_info = {
 61	.gen = 2,
 62	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 63		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
 64	.num_crtcs = 2,
 65	.routes = {
 66		/*
 67		 * R8A7745 has two RGB outputs
 68		 */
 69		[RCAR_DU_OUTPUT_DPAD0] = {
 70			.possible_crtcs = BIT(0),
 71			.port = 0,
 72		},
 73		[RCAR_DU_OUTPUT_DPAD1] = {
 74			.possible_crtcs = BIT(1),
 75			.port = 1,
 76		},
 77	},
 78};
 79
 80static const struct rcar_du_device_info rcar_du_r8a7779_info = {
 81	.gen = 2,
 82	.features = 0,
 83	.num_crtcs = 2,
 84	.routes = {
 85		/*
 86		 * R8A7779 has two RGB outputs and one (currently unsupported)
 87		 * TCON output.
 88		 */
 89		[RCAR_DU_OUTPUT_DPAD0] = {
 90			.possible_crtcs = BIT(0),
 91			.port = 0,
 92		},
 93		[RCAR_DU_OUTPUT_DPAD1] = {
 94			.possible_crtcs = BIT(1) | BIT(0),
 95			.port = 1,
 96		},
 97	},
 98};
 99
100static const struct rcar_du_device_info rcar_du_r8a7790_info = {
101	.gen = 2,
102	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
103		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
104	.quirks = RCAR_DU_QUIRK_ALIGN_128B,
105	.num_crtcs = 3,
106	.routes = {
107		/*
108		 * R8A7790 has one RGB output, two LVDS outputs and one
109		 * (currently unsupported) TCON output.
110		 */
111		[RCAR_DU_OUTPUT_DPAD0] = {
112			.possible_crtcs = BIT(2) | BIT(1) | BIT(0),
113			.port = 0,
114		},
115		[RCAR_DU_OUTPUT_LVDS0] = {
116			.possible_crtcs = BIT(0),
117			.port = 1,
118		},
119		[RCAR_DU_OUTPUT_LVDS1] = {
120			.possible_crtcs = BIT(2) | BIT(1),
121			.port = 2,
122		},
123	},
124	.num_lvds = 2,
125};
126
127/* M2-W (r8a7791) and M2-N (r8a7793) are identical */
128static const struct rcar_du_device_info rcar_du_r8a7791_info = {
129	.gen = 2,
130	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
131		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
132	.num_crtcs = 2,
133	.routes = {
134		/*
135		 * R8A779[13] has one RGB output, one LVDS output and one
136		 * (currently unsupported) TCON output.
137		 */
138		[RCAR_DU_OUTPUT_DPAD0] = {
139			.possible_crtcs = BIT(1) | BIT(0),
140			.port = 0,
141		},
142		[RCAR_DU_OUTPUT_LVDS0] = {
143			.possible_crtcs = BIT(0),
144			.port = 1,
145		},
146	},
147	.num_lvds = 1,
148};
149
150static const struct rcar_du_device_info rcar_du_r8a7792_info = {
151	.gen = 2,
152	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
153		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
154	.num_crtcs = 2,
155	.routes = {
156		/* R8A7792 has two RGB outputs. */
157		[RCAR_DU_OUTPUT_DPAD0] = {
158			.possible_crtcs = BIT(0),
159			.port = 0,
160		},
161		[RCAR_DU_OUTPUT_DPAD1] = {
162			.possible_crtcs = BIT(1),
163			.port = 1,
164		},
165	},
166};
167
168static const struct rcar_du_device_info rcar_du_r8a7794_info = {
169	.gen = 2,
170	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
171		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
172	.num_crtcs = 2,
173	.routes = {
174		/*
175		 * R8A7794 has two RGB outputs and one (currently unsupported)
176		 * TCON output.
177		 */
178		[RCAR_DU_OUTPUT_DPAD0] = {
179			.possible_crtcs = BIT(0),
180			.port = 0,
181		},
182		[RCAR_DU_OUTPUT_DPAD1] = {
183			.possible_crtcs = BIT(1),
184			.port = 1,
185		},
186	},
187};
188
189static const struct rcar_du_device_info rcar_du_r8a7795_info = {
190	.gen = 3,
191	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
192		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
193		  | RCAR_DU_FEATURE_VSP1_SOURCE,
194	.num_crtcs = 4,
195	.routes = {
196		/*
197		 * R8A7795 has one RGB output, two HDMI outputs and one
198		 * LVDS output.
199		 */
200		[RCAR_DU_OUTPUT_DPAD0] = {
201			.possible_crtcs = BIT(3),
202			.port = 0,
203		},
204		[RCAR_DU_OUTPUT_HDMI0] = {
205			.possible_crtcs = BIT(1),
206			.port = 1,
207		},
208		[RCAR_DU_OUTPUT_HDMI1] = {
209			.possible_crtcs = BIT(2),
210			.port = 2,
211		},
212		[RCAR_DU_OUTPUT_LVDS0] = {
213			.possible_crtcs = BIT(0),
214			.port = 3,
215		},
216	},
217	.num_lvds = 1,
218	.dpll_ch =  BIT(1) | BIT(2),
219};
220
221static const struct rcar_du_device_info rcar_du_r8a7796_info = {
222	.gen = 3,
223	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
224		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
225		  | RCAR_DU_FEATURE_VSP1_SOURCE,
226	.num_crtcs = 3,
227	.routes = {
228		/*
229		 * R8A7796 has one RGB output, one LVDS output and one HDMI
230		 * output.
231		 */
232		[RCAR_DU_OUTPUT_DPAD0] = {
233			.possible_crtcs = BIT(2),
234			.port = 0,
235		},
236		[RCAR_DU_OUTPUT_HDMI0] = {
237			.possible_crtcs = BIT(1),
238			.port = 1,
239		},
240		[RCAR_DU_OUTPUT_LVDS0] = {
241			.possible_crtcs = BIT(0),
242			.port = 2,
243		},
244	},
245	.num_lvds = 1,
246	.dpll_ch =  BIT(1),
247};
248
249static const struct rcar_du_device_info rcar_du_r8a77970_info = {
250	.gen = 3,
251	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
252		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
253		  | RCAR_DU_FEATURE_VSP1_SOURCE,
254	.num_crtcs = 1,
255	.routes = {
256		/* R8A77970 has one RGB output and one LVDS output. */
257		[RCAR_DU_OUTPUT_DPAD0] = {
258			.possible_crtcs = BIT(0),
259			.port = 0,
260		},
261		[RCAR_DU_OUTPUT_LVDS0] = {
262			.possible_crtcs = BIT(0),
263			.port = 1,
264		},
265	},
266	.num_lvds = 1,
267};
268
269static const struct of_device_id rcar_du_of_table[] = {
270	{ .compatible = "renesas,du-r8a7743", .data = &rzg1_du_r8a7743_info },
271	{ .compatible = "renesas,du-r8a7745", .data = &rzg1_du_r8a7745_info },
272	{ .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
273	{ .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
274	{ .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
275	{ .compatible = "renesas,du-r8a7792", .data = &rcar_du_r8a7792_info },
276	{ .compatible = "renesas,du-r8a7793", .data = &rcar_du_r8a7791_info },
277	{ .compatible = "renesas,du-r8a7794", .data = &rcar_du_r8a7794_info },
278	{ .compatible = "renesas,du-r8a7795", .data = &rcar_du_r8a7795_info },
279	{ .compatible = "renesas,du-r8a7796", .data = &rcar_du_r8a7796_info },
280	{ .compatible = "renesas,du-r8a77970", .data = &rcar_du_r8a77970_info },
281	{ }
282};
283
284MODULE_DEVICE_TABLE(of, rcar_du_of_table);
285
286/* -----------------------------------------------------------------------------
287 * DRM operations
288 */
289
290static void rcar_du_lastclose(struct drm_device *dev)
291{
292	struct rcar_du_device *rcdu = dev->dev_private;
293
294	drm_fbdev_cma_restore_mode(rcdu->fbdev);
295}
296
297DEFINE_DRM_GEM_CMA_FOPS(rcar_du_fops);
298
299static struct drm_driver rcar_du_driver = {
300	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
301				| DRIVER_ATOMIC,
302	.lastclose		= rcar_du_lastclose,
303	.gem_free_object_unlocked = drm_gem_cma_free_object,
304	.gem_vm_ops		= &drm_gem_cma_vm_ops,
305	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
306	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
307	.gem_prime_import	= drm_gem_prime_import,
308	.gem_prime_export	= drm_gem_prime_export,
309	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
310	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
311	.gem_prime_vmap		= drm_gem_cma_prime_vmap,
312	.gem_prime_vunmap	= drm_gem_cma_prime_vunmap,
313	.gem_prime_mmap		= drm_gem_cma_prime_mmap,
314	.dumb_create		= rcar_du_dumb_create,
315	.fops			= &rcar_du_fops,
316	.name			= "rcar-du",
317	.desc			= "Renesas R-Car Display Unit",
318	.date			= "20130110",
319	.major			= 1,
320	.minor			= 0,
321};
322
323/* -----------------------------------------------------------------------------
324 * Power management
325 */
326
327#ifdef CONFIG_PM_SLEEP
328static int rcar_du_pm_suspend(struct device *dev)
329{
330	struct rcar_du_device *rcdu = dev_get_drvdata(dev);
331	struct drm_atomic_state *state;
332
333	drm_kms_helper_poll_disable(rcdu->ddev);
334	drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, true);
335
336	state = drm_atomic_helper_suspend(rcdu->ddev);
337	if (IS_ERR(state)) {
338		drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
339		drm_kms_helper_poll_enable(rcdu->ddev);
340		return PTR_ERR(state);
341	}
342
343	rcdu->suspend_state = state;
344
345	return 0;
346}
347
348static int rcar_du_pm_resume(struct device *dev)
349{
350	struct rcar_du_device *rcdu = dev_get_drvdata(dev);
351
352	drm_atomic_helper_resume(rcdu->ddev, rcdu->suspend_state);
353	drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
354	drm_kms_helper_poll_enable(rcdu->ddev);
355
356	return 0;
357}
358#endif
359
360static const struct dev_pm_ops rcar_du_pm_ops = {
361	SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
362};
363
364/* -----------------------------------------------------------------------------
365 * Platform driver
366 */
367
368static int rcar_du_remove(struct platform_device *pdev)
369{
370	struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
371	struct drm_device *ddev = rcdu->ddev;
372
373	drm_dev_unregister(ddev);
374
375	if (rcdu->fbdev)
376		drm_fbdev_cma_fini(rcdu->fbdev);
377
378	drm_kms_helper_poll_fini(ddev);
379	drm_mode_config_cleanup(ddev);
380
381	drm_dev_unref(ddev);
382
383	return 0;
384}
385
386static int rcar_du_probe(struct platform_device *pdev)
387{
388	struct rcar_du_device *rcdu;
389	struct drm_device *ddev;
390	struct resource *mem;
391	int ret;
392
393	/* Allocate and initialize the R-Car device structure. */
394	rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
395	if (rcdu == NULL)
396		return -ENOMEM;
397
398	rcdu->dev = &pdev->dev;
399	rcdu->info = of_device_get_match_data(rcdu->dev);
400
401	platform_set_drvdata(pdev, rcdu);
402
403	/* I/O resources */
404	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
405	rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
406	if (IS_ERR(rcdu->mmio))
407		return PTR_ERR(rcdu->mmio);
408
409	/* DRM/KMS objects */
410	ddev = drm_dev_alloc(&rcar_du_driver, &pdev->dev);
411	if (IS_ERR(ddev))
412		return PTR_ERR(ddev);
413
414	rcdu->ddev = ddev;
415	ddev->dev_private = rcdu;
416
417	ret = rcar_du_modeset_init(rcdu);
418	if (ret < 0) {
419		if (ret != -EPROBE_DEFER)
420			dev_err(&pdev->dev,
421				"failed to initialize DRM/KMS (%d)\n", ret);
422		goto error;
423	}
424
425	ddev->irq_enabled = 1;
426
427	/*
428	 * Register the DRM device with the core and the connectors with
429	 * sysfs.
430	 */
431	ret = drm_dev_register(ddev, 0);
432	if (ret)
433		goto error;
434
435	DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));
436
437	return 0;
438
439error:
440	rcar_du_remove(pdev);
441
442	return ret;
443}
444
445static struct platform_driver rcar_du_platform_driver = {
446	.probe		= rcar_du_probe,
447	.remove		= rcar_du_remove,
448	.driver		= {
449		.name	= "rcar-du",
450		.pm	= &rcar_du_pm_ops,
451		.of_match_table = rcar_du_of_table,
452	},
453};
454
455static int __init rcar_du_init(void)
456{
457	rcar_du_of_init(rcar_du_of_table);
458
459	return platform_driver_register(&rcar_du_platform_driver);
460}
461module_init(rcar_du_init);
462
463static void __exit rcar_du_exit(void)
464{
465	platform_driver_unregister(&rcar_du_platform_driver);
466}
467module_exit(rcar_du_exit);
468
469MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
470MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
471MODULE_LICENSE("GPL");