1 /*
2 * rcar_du_drv.c -- R-Car Display Unit DRM driver
3 *
4 * Copyright (C) 2013-2014 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
38 static const struct rcar_du_device_info rcar_du_r8a7779_info = {
39 .features = 0,
40 .num_crtcs = 2,
41 .routes = {
42 /* R8A7779 has two RGB outputs and one (currently unsupported)
43 * TCON output.
44 */
45 [RCAR_DU_OUTPUT_DPAD0] = {
46 .possible_crtcs = BIT(0),
47 .encoder_type = DRM_MODE_ENCODER_NONE,
48 .port = 0,
49 },
50 [RCAR_DU_OUTPUT_DPAD1] = {
51 .possible_crtcs = BIT(1) | BIT(0),
52 .encoder_type = DRM_MODE_ENCODER_NONE,
53 .port = 1,
54 },
55 },
56 .num_lvds = 0,
57 };
58
59 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
60 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
61 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
62 .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
63 .num_crtcs = 3,
64 .routes = {
65 /* R8A7790 has one RGB output, two LVDS outputs and one
66 * (currently unsupported) TCON output.
67 */
68 [RCAR_DU_OUTPUT_DPAD0] = {
69 .possible_crtcs = BIT(2) | BIT(1) | BIT(0),
70 .encoder_type = DRM_MODE_ENCODER_NONE,
71 .port = 0,
72 },
73 [RCAR_DU_OUTPUT_LVDS0] = {
74 .possible_crtcs = BIT(0),
75 .encoder_type = DRM_MODE_ENCODER_LVDS,
76 .port = 1,
77 },
78 [RCAR_DU_OUTPUT_LVDS1] = {
79 .possible_crtcs = BIT(2) | BIT(1),
80 .encoder_type = DRM_MODE_ENCODER_LVDS,
81 .port = 2,
82 },
83 },
84 .num_lvds = 2,
85 };
86
87 /* M2-W (r8a7791) and M2-N (r8a7793) are identical */
88 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
89 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
90 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
91 .num_crtcs = 2,
92 .routes = {
93 /* R8A779[13] has one RGB output, one LVDS output and one
94 * (currently unsupported) TCON output.
95 */
96 [RCAR_DU_OUTPUT_DPAD0] = {
97 .possible_crtcs = BIT(1) | BIT(0),
98 .encoder_type = DRM_MODE_ENCODER_NONE,
99 .port = 0,
100 },
101 [RCAR_DU_OUTPUT_LVDS0] = {
102 .possible_crtcs = BIT(0),
103 .encoder_type = DRM_MODE_ENCODER_LVDS,
104 .port = 1,
105 },
106 },
107 .num_lvds = 1,
108 };
109
110 static const struct rcar_du_device_info rcar_du_r8a7794_info = {
111 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
112 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
113 .num_crtcs = 2,
114 .routes = {
115 /* R8A7794 has two RGB outputs and one (currently unsupported)
116 * TCON output.
117 */
118 [RCAR_DU_OUTPUT_DPAD0] = {
119 .possible_crtcs = BIT(0),
120 .encoder_type = DRM_MODE_ENCODER_NONE,
121 .port = 0,
122 },
123 [RCAR_DU_OUTPUT_DPAD1] = {
124 .possible_crtcs = BIT(1),
125 .encoder_type = DRM_MODE_ENCODER_NONE,
126 .port = 1,
127 },
128 },
129 .num_lvds = 0,
130 };
131
132 static const struct of_device_id rcar_du_of_table[] = {
133 { .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
134 { .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
135 { .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
136 { .compatible = "renesas,du-r8a7793", .data = &rcar_du_r8a7791_info },
137 { .compatible = "renesas,du-r8a7794", .data = &rcar_du_r8a7794_info },
138 { }
139 };
140
141 MODULE_DEVICE_TABLE(of, rcar_du_of_table);
142
143 /* -----------------------------------------------------------------------------
144 * DRM operations
145 */
146
rcar_du_unload(struct drm_device * dev)147 static int rcar_du_unload(struct drm_device *dev)
148 {
149 struct rcar_du_device *rcdu = dev->dev_private;
150
151 if (rcdu->fbdev)
152 drm_fbdev_cma_fini(rcdu->fbdev);
153
154 drm_kms_helper_poll_fini(dev);
155 drm_mode_config_cleanup(dev);
156 drm_vblank_cleanup(dev);
157
158 dev->irq_enabled = 0;
159 dev->dev_private = NULL;
160
161 return 0;
162 }
163
rcar_du_load(struct drm_device * dev,unsigned long flags)164 static int rcar_du_load(struct drm_device *dev, unsigned long flags)
165 {
166 struct platform_device *pdev = dev->platformdev;
167 struct device_node *np = pdev->dev.of_node;
168 struct rcar_du_device *rcdu;
169 struct resource *mem;
170 int ret;
171
172 if (np == NULL) {
173 dev_err(dev->dev, "no platform data\n");
174 return -ENODEV;
175 }
176
177 rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
178 if (rcdu == NULL) {
179 dev_err(dev->dev, "failed to allocate private data\n");
180 return -ENOMEM;
181 }
182
183 init_waitqueue_head(&rcdu->commit.wait);
184
185 rcdu->dev = &pdev->dev;
186 rcdu->info = of_match_device(rcar_du_of_table, rcdu->dev)->data;
187 rcdu->ddev = dev;
188 dev->dev_private = rcdu;
189
190 /* I/O resources */
191 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
192 rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
193 if (IS_ERR(rcdu->mmio))
194 return PTR_ERR(rcdu->mmio);
195
196 /* Initialize vertical blanking interrupts handling. Start with vblank
197 * disabled for all CRTCs.
198 */
199 ret = drm_vblank_init(dev, (1 << rcdu->info->num_crtcs) - 1);
200 if (ret < 0) {
201 dev_err(&pdev->dev, "failed to initialize vblank\n");
202 goto done;
203 }
204
205 /* DRM/KMS objects */
206 ret = rcar_du_modeset_init(rcdu);
207 if (ret < 0) {
208 dev_err(&pdev->dev, "failed to initialize DRM/KMS (%d)\n", ret);
209 goto done;
210 }
211
212 dev->irq_enabled = 1;
213
214 platform_set_drvdata(pdev, rcdu);
215
216 done:
217 if (ret)
218 rcar_du_unload(dev);
219
220 return ret;
221 }
222
rcar_du_preclose(struct drm_device * dev,struct drm_file * file)223 static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
224 {
225 struct rcar_du_device *rcdu = dev->dev_private;
226 unsigned int i;
227
228 for (i = 0; i < rcdu->num_crtcs; ++i)
229 rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
230 }
231
rcar_du_lastclose(struct drm_device * dev)232 static void rcar_du_lastclose(struct drm_device *dev)
233 {
234 struct rcar_du_device *rcdu = dev->dev_private;
235
236 drm_fbdev_cma_restore_mode(rcdu->fbdev);
237 }
238
rcar_du_enable_vblank(struct drm_device * dev,unsigned int pipe)239 static int rcar_du_enable_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], true);
244
245 return 0;
246 }
247
rcar_du_disable_vblank(struct drm_device * dev,unsigned int pipe)248 static void rcar_du_disable_vblank(struct drm_device *dev, unsigned int pipe)
249 {
250 struct rcar_du_device *rcdu = dev->dev_private;
251
252 rcar_du_crtc_enable_vblank(&rcdu->crtcs[pipe], false);
253 }
254
255 static const struct file_operations rcar_du_fops = {
256 .owner = THIS_MODULE,
257 .open = drm_open,
258 .release = drm_release,
259 .unlocked_ioctl = drm_ioctl,
260 #ifdef CONFIG_COMPAT
261 .compat_ioctl = drm_compat_ioctl,
262 #endif
263 .poll = drm_poll,
264 .read = drm_read,
265 .llseek = no_llseek,
266 .mmap = drm_gem_cma_mmap,
267 };
268
269 static struct drm_driver rcar_du_driver = {
270 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
271 | DRIVER_ATOMIC,
272 .load = rcar_du_load,
273 .unload = rcar_du_unload,
274 .preclose = rcar_du_preclose,
275 .lastclose = rcar_du_lastclose,
276 .set_busid = drm_platform_set_busid,
277 .get_vblank_counter = drm_vblank_no_hw_counter,
278 .enable_vblank = rcar_du_enable_vblank,
279 .disable_vblank = rcar_du_disable_vblank,
280 .gem_free_object = drm_gem_cma_free_object,
281 .gem_vm_ops = &drm_gem_cma_vm_ops,
282 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
283 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
284 .gem_prime_import = drm_gem_prime_import,
285 .gem_prime_export = drm_gem_prime_export,
286 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
287 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
288 .gem_prime_vmap = drm_gem_cma_prime_vmap,
289 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
290 .gem_prime_mmap = drm_gem_cma_prime_mmap,
291 .dumb_create = rcar_du_dumb_create,
292 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
293 .dumb_destroy = drm_gem_dumb_destroy,
294 .fops = &rcar_du_fops,
295 .name = "rcar-du",
296 .desc = "Renesas R-Car Display Unit",
297 .date = "20130110",
298 .major = 1,
299 .minor = 0,
300 };
301
302 /* -----------------------------------------------------------------------------
303 * Power management
304 */
305
306 #ifdef CONFIG_PM_SLEEP
rcar_du_pm_suspend(struct device * dev)307 static int rcar_du_pm_suspend(struct device *dev)
308 {
309 struct rcar_du_device *rcdu = dev_get_drvdata(dev);
310
311 drm_kms_helper_poll_disable(rcdu->ddev);
312 /* TODO Suspend the CRTC */
313
314 return 0;
315 }
316
rcar_du_pm_resume(struct device * dev)317 static int rcar_du_pm_resume(struct device *dev)
318 {
319 struct rcar_du_device *rcdu = dev_get_drvdata(dev);
320
321 /* TODO Resume the CRTC */
322
323 drm_kms_helper_poll_enable(rcdu->ddev);
324 return 0;
325 }
326 #endif
327
328 static const struct dev_pm_ops rcar_du_pm_ops = {
329 SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
330 };
331
332 /* -----------------------------------------------------------------------------
333 * Platform driver
334 */
335
rcar_du_probe(struct platform_device * pdev)336 static int rcar_du_probe(struct platform_device *pdev)
337 {
338 return drm_platform_init(&rcar_du_driver, pdev);
339 }
340
rcar_du_remove(struct platform_device * pdev)341 static int rcar_du_remove(struct platform_device *pdev)
342 {
343 struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
344
345 drm_put_dev(rcdu->ddev);
346
347 return 0;
348 }
349
350 static struct platform_driver rcar_du_platform_driver = {
351 .probe = rcar_du_probe,
352 .remove = rcar_du_remove,
353 .driver = {
354 .name = "rcar-du",
355 .pm = &rcar_du_pm_ops,
356 .of_match_table = rcar_du_of_table,
357 },
358 };
359
360 module_platform_driver(rcar_du_platform_driver);
361
362 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
363 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
364 MODULE_LICENSE("GPL");
365