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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_crtc_helper.h>
26#include <drm/drm_fb_cma_helper.h>
27#include <drm/drm_gem_cma_helper.h>
28
29#include "rcar_du_crtc.h"
30#include "rcar_du_drv.h"
31#include "rcar_du_kms.h"
32#include "rcar_du_regs.h"
33
34/* -----------------------------------------------------------------------------
35 * Device Information
36 */
37
38static const struct rcar_du_device_info rcar_du_r8a7779_info = {
39 .gen = 2,
40 .features = 0,
41 .num_crtcs = 2,
42 .routes = {
43 /* R8A7779 has two RGB outputs and one (currently unsupported)
44 * TCON output.
45 */
46 [RCAR_DU_OUTPUT_DPAD0] = {
47 .possible_crtcs = BIT(0),
48 .encoder_type = DRM_MODE_ENCODER_NONE,
49 .port = 0,
50 },
51 [RCAR_DU_OUTPUT_DPAD1] = {
52 .possible_crtcs = BIT(1) | BIT(0),
53 .encoder_type = DRM_MODE_ENCODER_NONE,
54 .port = 1,
55 },
56 },
57 .num_lvds = 0,
58};
59
60static const struct rcar_du_device_info rcar_du_r8a7790_info = {
61 .gen = 2,
62 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
63 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
64 .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
65 .num_crtcs = 3,
66 .routes = {
67 /* R8A7790 has one RGB output, two LVDS outputs and one
68 * (currently unsupported) TCON output.
69 */
70 [RCAR_DU_OUTPUT_DPAD0] = {
71 .possible_crtcs = BIT(2) | BIT(1) | BIT(0),
72 .encoder_type = DRM_MODE_ENCODER_NONE,
73 .port = 0,
74 },
75 [RCAR_DU_OUTPUT_LVDS0] = {
76 .possible_crtcs = BIT(0),
77 .encoder_type = DRM_MODE_ENCODER_LVDS,
78 .port = 1,
79 },
80 [RCAR_DU_OUTPUT_LVDS1] = {
81 .possible_crtcs = BIT(2) | BIT(1),
82 .encoder_type = DRM_MODE_ENCODER_LVDS,
83 .port = 2,
84 },
85 },
86 .num_lvds = 2,
87};
88
89/* M2-W (r8a7791) and M2-N (r8a7793) are identical */
90static const struct rcar_du_device_info rcar_du_r8a7791_info = {
91 .gen = 2,
92 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
93 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
94 .num_crtcs = 2,
95 .routes = {
96 /* R8A779[13] has one RGB output, one LVDS output and one
97 * (currently unsupported) TCON output.
98 */
99 [RCAR_DU_OUTPUT_DPAD0] = {
100 .possible_crtcs = BIT(1) | BIT(0),
101 .encoder_type = DRM_MODE_ENCODER_NONE,
102 .port = 0,
103 },
104 [RCAR_DU_OUTPUT_LVDS0] = {
105 .possible_crtcs = BIT(0),
106 .encoder_type = DRM_MODE_ENCODER_LVDS,
107 .port = 1,
108 },
109 },
110 .num_lvds = 1,
111};
112
113static const struct rcar_du_device_info rcar_du_r8a7792_info = {
114 .gen = 2,
115 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
116 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
117 .num_crtcs = 2,
118 .routes = {
119 /* R8A7792 has two RGB outputs. */
120 [RCAR_DU_OUTPUT_DPAD0] = {
121 .possible_crtcs = BIT(0),
122 .encoder_type = DRM_MODE_ENCODER_NONE,
123 .port = 0,
124 },
125 [RCAR_DU_OUTPUT_DPAD1] = {
126 .possible_crtcs = BIT(1),
127 .encoder_type = DRM_MODE_ENCODER_NONE,
128 .port = 1,
129 },
130 },
131 .num_lvds = 0,
132};
133
134static const struct rcar_du_device_info rcar_du_r8a7794_info = {
135 .gen = 2,
136 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
137 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
138 .num_crtcs = 2,
139 .routes = {
140 /* R8A7794 has two RGB outputs and one (currently unsupported)
141 * TCON output.
142 */
143 [RCAR_DU_OUTPUT_DPAD0] = {
144 .possible_crtcs = BIT(0),
145 .encoder_type = DRM_MODE_ENCODER_NONE,
146 .port = 0,
147 },
148 [RCAR_DU_OUTPUT_DPAD1] = {
149 .possible_crtcs = BIT(1),
150 .encoder_type = DRM_MODE_ENCODER_NONE,
151 .port = 1,
152 },
153 },
154 .num_lvds = 0,
155};
156
157static const struct rcar_du_device_info rcar_du_r8a7795_info = {
158 .gen = 3,
159 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
160 | RCAR_DU_FEATURE_EXT_CTRL_REGS
161 | RCAR_DU_FEATURE_VSP1_SOURCE,
162 .num_crtcs = 4,
163 .routes = {
164 /* R8A7795 has one RGB output, one LVDS output and two
165 * (currently unsupported) HDMI outputs.
166 */
167 [RCAR_DU_OUTPUT_DPAD0] = {
168 .possible_crtcs = BIT(3),
169 .encoder_type = DRM_MODE_ENCODER_NONE,
170 .port = 0,
171 },
172 [RCAR_DU_OUTPUT_LVDS0] = {
173 .possible_crtcs = BIT(0),
174 .encoder_type = DRM_MODE_ENCODER_LVDS,
175 .port = 3,
176 },
177 },
178 .num_lvds = 1,
179};
180
181static const struct rcar_du_device_info rcar_du_r8a7796_info = {
182 .gen = 3,
183 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
184 | RCAR_DU_FEATURE_EXT_CTRL_REGS
185 | RCAR_DU_FEATURE_VSP1_SOURCE,
186 .num_crtcs = 3,
187 .routes = {
188 /* R8A7796 has one RGB output, one LVDS output and one
189 * (currently unsupported) HDMI output.
190 */
191 [RCAR_DU_OUTPUT_DPAD0] = {
192 .possible_crtcs = BIT(2),
193 .encoder_type = DRM_MODE_ENCODER_NONE,
194 .port = 0,
195 },
196 [RCAR_DU_OUTPUT_LVDS0] = {
197 .possible_crtcs = BIT(0),
198 .encoder_type = DRM_MODE_ENCODER_LVDS,
199 .port = 2,
200 },
201 },
202 .num_lvds = 1,
203};
204
205static const struct of_device_id rcar_du_of_table[] = {
206 { .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
207 { .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
208 { .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
209 { .compatible = "renesas,du-r8a7792", .data = &rcar_du_r8a7792_info },
210 { .compatible = "renesas,du-r8a7793", .data = &rcar_du_r8a7791_info },
211 { .compatible = "renesas,du-r8a7794", .data = &rcar_du_r8a7794_info },
212 { .compatible = "renesas,du-r8a7795", .data = &rcar_du_r8a7795_info },
213 { .compatible = "renesas,du-r8a7796", .data = &rcar_du_r8a7796_info },
214 { }
215};
216
217MODULE_DEVICE_TABLE(of, rcar_du_of_table);
218
219/* -----------------------------------------------------------------------------
220 * DRM operations
221 */
222
223static void rcar_du_lastclose(struct drm_device *dev)
224{
225 struct rcar_du_device *rcdu = dev->dev_private;
226
227 drm_fbdev_cma_restore_mode(rcdu->fbdev);
228}
229
230static int rcar_du_enable_vblank(struct drm_device *dev, unsigned int pipe)
231{
232 struct rcar_du_device *rcdu = dev->dev_private;
233
234 rcar_du_crtc_enable_vblank(&rcdu->crtcs[pipe], true);
235
236 return 0;
237}
238
239static void rcar_du_disable_vblank(struct drm_device *dev, unsigned int pipe)
240{
241 struct rcar_du_device *rcdu = dev->dev_private;
242
243 rcar_du_crtc_enable_vblank(&rcdu->crtcs[pipe], false);
244}
245
246static const struct file_operations rcar_du_fops = {
247 .owner = THIS_MODULE,
248 .open = drm_open,
249 .release = drm_release,
250 .unlocked_ioctl = drm_ioctl,
251 .compat_ioctl = drm_compat_ioctl,
252 .poll = drm_poll,
253 .read = drm_read,
254 .llseek = no_llseek,
255 .mmap = drm_gem_cma_mmap,
256};
257
258static struct drm_driver rcar_du_driver = {
259 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
260 | DRIVER_ATOMIC,
261 .lastclose = rcar_du_lastclose,
262 .get_vblank_counter = drm_vblank_no_hw_counter,
263 .enable_vblank = rcar_du_enable_vblank,
264 .disable_vblank = rcar_du_disable_vblank,
265 .gem_free_object_unlocked = drm_gem_cma_free_object,
266 .gem_vm_ops = &drm_gem_cma_vm_ops,
267 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
268 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
269 .gem_prime_import = drm_gem_prime_import,
270 .gem_prime_export = drm_gem_prime_export,
271 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
272 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
273 .gem_prime_vmap = drm_gem_cma_prime_vmap,
274 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
275 .gem_prime_mmap = drm_gem_cma_prime_mmap,
276 .dumb_create = rcar_du_dumb_create,
277 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
278 .dumb_destroy = drm_gem_dumb_destroy,
279 .fops = &rcar_du_fops,
280 .name = "rcar-du",
281 .desc = "Renesas R-Car Display Unit",
282 .date = "20130110",
283 .major = 1,
284 .minor = 0,
285};
286
287/* -----------------------------------------------------------------------------
288 * Power management
289 */
290
291#ifdef CONFIG_PM_SLEEP
292static int rcar_du_pm_suspend(struct device *dev)
293{
294 struct rcar_du_device *rcdu = dev_get_drvdata(dev);
295
296 drm_kms_helper_poll_disable(rcdu->ddev);
297 /* TODO Suspend the CRTC */
298
299 return 0;
300}
301
302static int rcar_du_pm_resume(struct device *dev)
303{
304 struct rcar_du_device *rcdu = dev_get_drvdata(dev);
305
306 /* TODO Resume the CRTC */
307
308 drm_kms_helper_poll_enable(rcdu->ddev);
309 return 0;
310}
311#endif
312
313static const struct dev_pm_ops rcar_du_pm_ops = {
314 SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
315};
316
317/* -----------------------------------------------------------------------------
318 * Platform driver
319 */
320
321static int rcar_du_remove(struct platform_device *pdev)
322{
323 struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
324 struct drm_device *ddev = rcdu->ddev;
325
326 drm_dev_unregister(ddev);
327
328 if (rcdu->fbdev)
329 drm_fbdev_cma_fini(rcdu->fbdev);
330
331 drm_kms_helper_poll_fini(ddev);
332 drm_mode_config_cleanup(ddev);
333
334 drm_dev_unref(ddev);
335
336 return 0;
337}
338
339static int rcar_du_probe(struct platform_device *pdev)
340{
341 struct rcar_du_device *rcdu;
342 struct drm_device *ddev;
343 struct resource *mem;
344 int ret;
345
346 /* Allocate and initialize the R-Car device structure. */
347 rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
348 if (rcdu == NULL)
349 return -ENOMEM;
350
351 init_waitqueue_head(&rcdu->commit.wait);
352
353 rcdu->dev = &pdev->dev;
354 rcdu->info = of_match_device(rcar_du_of_table, rcdu->dev)->data;
355
356 platform_set_drvdata(pdev, rcdu);
357
358 /* I/O resources */
359 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
360 rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
361 if (IS_ERR(rcdu->mmio))
362 return PTR_ERR(rcdu->mmio);
363
364 /* DRM/KMS objects */
365 ddev = drm_dev_alloc(&rcar_du_driver, &pdev->dev);
366 if (IS_ERR(ddev))
367 return PTR_ERR(ddev);
368
369 rcdu->ddev = ddev;
370 ddev->dev_private = rcdu;
371
372 ret = rcar_du_modeset_init(rcdu);
373 if (ret < 0) {
374 if (ret != -EPROBE_DEFER)
375 dev_err(&pdev->dev,
376 "failed to initialize DRM/KMS (%d)\n", ret);
377 goto error;
378 }
379
380 ddev->irq_enabled = 1;
381
382 /* Register the DRM device with the core and the connectors with
383 * sysfs.
384 */
385 ret = drm_dev_register(ddev, 0);
386 if (ret)
387 goto error;
388
389 DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));
390
391 return 0;
392
393error:
394 rcar_du_remove(pdev);
395
396 return ret;
397}
398
399static struct platform_driver rcar_du_platform_driver = {
400 .probe = rcar_du_probe,
401 .remove = rcar_du_remove,
402 .driver = {
403 .name = "rcar-du",
404 .pm = &rcar_du_pm_ops,
405 .of_match_table = rcar_du_of_table,
406 },
407};
408
409module_platform_driver(rcar_du_platform_driver);
410
411MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
412MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
413MODULE_LICENSE("GPL");