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
23 #include <drm/drmP.h>
24 #include <drm/drm_crtc_helper.h>
25 #include <drm/drm_fb_cma_helper.h>
26 #include <drm/drm_gem_cma_helper.h>
27
28 #include "rcar_du_crtc.h"
29 #include "rcar_du_drv.h"
30 #include "rcar_du_kms.h"
31 #include "rcar_du_regs.h"
32
33 /* -----------------------------------------------------------------------------
34 * Device Information
35 */
36
37 static const struct rcar_du_device_info rcar_du_r8a7779_info = {
38 .features = 0,
39 .num_crtcs = 2,
40 .routes = {
41 /* R8A7779 has two RGB outputs and one (currently unsupported)
42 * TCON output.
43 */
44 [RCAR_DU_OUTPUT_DPAD0] = {
45 .possible_crtcs = BIT(0),
46 .encoder_type = DRM_MODE_ENCODER_NONE,
47 .port = 0,
48 },
49 [RCAR_DU_OUTPUT_DPAD1] = {
50 .possible_crtcs = BIT(1) | BIT(0),
51 .encoder_type = DRM_MODE_ENCODER_NONE,
52 .port = 1,
53 },
54 },
55 .num_lvds = 0,
56 };
57
58 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
59 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
60 .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
61 .num_crtcs = 3,
62 .routes = {
63 /* R8A7790 has one RGB output, two LVDS outputs and one
64 * (currently unsupported) TCON output.
65 */
66 [RCAR_DU_OUTPUT_DPAD0] = {
67 .possible_crtcs = BIT(2) | BIT(1) | BIT(0),
68 .encoder_type = DRM_MODE_ENCODER_NONE,
69 .port = 0,
70 },
71 [RCAR_DU_OUTPUT_LVDS0] = {
72 .possible_crtcs = BIT(0),
73 .encoder_type = DRM_MODE_ENCODER_LVDS,
74 .port = 1,
75 },
76 [RCAR_DU_OUTPUT_LVDS1] = {
77 .possible_crtcs = BIT(2) | BIT(1),
78 .encoder_type = DRM_MODE_ENCODER_LVDS,
79 .port = 2,
80 },
81 },
82 .num_lvds = 2,
83 };
84
85 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
86 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
87 .num_crtcs = 2,
88 .routes = {
89 /* R8A7791 has one RGB output, one LVDS output and one
90 * (currently unsupported) TCON output.
91 */
92 [RCAR_DU_OUTPUT_DPAD0] = {
93 .possible_crtcs = BIT(1),
94 .encoder_type = DRM_MODE_ENCODER_NONE,
95 .port = 0,
96 },
97 [RCAR_DU_OUTPUT_LVDS0] = {
98 .possible_crtcs = BIT(0),
99 .encoder_type = DRM_MODE_ENCODER_LVDS,
100 .port = 1,
101 },
102 },
103 .num_lvds = 1,
104 };
105
106 static const struct platform_device_id rcar_du_id_table[] = {
107 { "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
108 { "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
109 { "rcar-du-r8a7791", (kernel_ulong_t)&rcar_du_r8a7791_info },
110 { }
111 };
112
113 MODULE_DEVICE_TABLE(platform, rcar_du_id_table);
114
115 static const struct of_device_id rcar_du_of_table[] = {
116 { .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
117 { .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
118 { .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
119 { }
120 };
121
122 MODULE_DEVICE_TABLE(of, rcar_du_of_table);
123
124 /* -----------------------------------------------------------------------------
125 * DRM operations
126 */
127
rcar_du_unload(struct drm_device * dev)128 static int rcar_du_unload(struct drm_device *dev)
129 {
130 struct rcar_du_device *rcdu = dev->dev_private;
131
132 if (rcdu->fbdev)
133 drm_fbdev_cma_fini(rcdu->fbdev);
134
135 drm_kms_helper_poll_fini(dev);
136 drm_mode_config_cleanup(dev);
137 drm_vblank_cleanup(dev);
138
139 dev->irq_enabled = 0;
140 dev->dev_private = NULL;
141
142 return 0;
143 }
144
rcar_du_load(struct drm_device * dev,unsigned long flags)145 static int rcar_du_load(struct drm_device *dev, unsigned long flags)
146 {
147 struct platform_device *pdev = dev->platformdev;
148 struct device_node *np = pdev->dev.of_node;
149 struct rcar_du_platform_data *pdata = pdev->dev.platform_data;
150 struct rcar_du_device *rcdu;
151 struct resource *mem;
152 int ret;
153
154 if (pdata == NULL && np == NULL) {
155 dev_err(dev->dev, "no platform data\n");
156 return -ENODEV;
157 }
158
159 rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
160 if (rcdu == NULL) {
161 dev_err(dev->dev, "failed to allocate private data\n");
162 return -ENOMEM;
163 }
164
165 rcdu->dev = &pdev->dev;
166 rcdu->pdata = pdata;
167 rcdu->info = np ? of_match_device(rcar_du_of_table, rcdu->dev)->data
168 : (void *)platform_get_device_id(pdev)->driver_data;
169 rcdu->ddev = dev;
170 dev->dev_private = rcdu;
171
172 /* I/O resources */
173 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
174 rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
175 if (IS_ERR(rcdu->mmio))
176 return PTR_ERR(rcdu->mmio);
177
178 /* DRM/KMS objects */
179 ret = rcar_du_modeset_init(rcdu);
180 if (ret < 0) {
181 dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
182 goto done;
183 }
184
185 /* vblank handling */
186 ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
187 if (ret < 0) {
188 dev_err(&pdev->dev, "failed to initialize vblank\n");
189 goto done;
190 }
191
192 dev->irq_enabled = 1;
193
194 platform_set_drvdata(pdev, rcdu);
195
196 done:
197 if (ret)
198 rcar_du_unload(dev);
199
200 return ret;
201 }
202
rcar_du_preclose(struct drm_device * dev,struct drm_file * file)203 static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
204 {
205 struct rcar_du_device *rcdu = dev->dev_private;
206 unsigned int i;
207
208 for (i = 0; i < rcdu->num_crtcs; ++i)
209 rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
210 }
211
rcar_du_lastclose(struct drm_device * dev)212 static void rcar_du_lastclose(struct drm_device *dev)
213 {
214 struct rcar_du_device *rcdu = dev->dev_private;
215
216 drm_fbdev_cma_restore_mode(rcdu->fbdev);
217 }
218
rcar_du_enable_vblank(struct drm_device * dev,int crtc)219 static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
220 {
221 struct rcar_du_device *rcdu = dev->dev_private;
222
223 rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);
224
225 return 0;
226 }
227
rcar_du_disable_vblank(struct drm_device * dev,int crtc)228 static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
229 {
230 struct rcar_du_device *rcdu = dev->dev_private;
231
232 rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
233 }
234
235 static const struct file_operations rcar_du_fops = {
236 .owner = THIS_MODULE,
237 .open = drm_open,
238 .release = drm_release,
239 .unlocked_ioctl = drm_ioctl,
240 #ifdef CONFIG_COMPAT
241 .compat_ioctl = drm_compat_ioctl,
242 #endif
243 .poll = drm_poll,
244 .read = drm_read,
245 .llseek = no_llseek,
246 .mmap = drm_gem_cma_mmap,
247 };
248
249 static struct drm_driver rcar_du_driver = {
250 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME,
251 .load = rcar_du_load,
252 .unload = rcar_du_unload,
253 .preclose = rcar_du_preclose,
254 .lastclose = rcar_du_lastclose,
255 .set_busid = drm_platform_set_busid,
256 .get_vblank_counter = drm_vblank_count,
257 .enable_vblank = rcar_du_enable_vblank,
258 .disable_vblank = rcar_du_disable_vblank,
259 .gem_free_object = drm_gem_cma_free_object,
260 .gem_vm_ops = &drm_gem_cma_vm_ops,
261 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
262 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
263 .gem_prime_import = drm_gem_prime_import,
264 .gem_prime_export = drm_gem_prime_export,
265 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
266 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
267 .gem_prime_vmap = drm_gem_cma_prime_vmap,
268 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
269 .gem_prime_mmap = drm_gem_cma_prime_mmap,
270 .dumb_create = rcar_du_dumb_create,
271 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
272 .dumb_destroy = drm_gem_dumb_destroy,
273 .fops = &rcar_du_fops,
274 .name = "rcar-du",
275 .desc = "Renesas R-Car Display Unit",
276 .date = "20130110",
277 .major = 1,
278 .minor = 0,
279 };
280
281 /* -----------------------------------------------------------------------------
282 * Power management
283 */
284
285 #ifdef CONFIG_PM_SLEEP
rcar_du_pm_suspend(struct device * dev)286 static int rcar_du_pm_suspend(struct device *dev)
287 {
288 struct rcar_du_device *rcdu = dev_get_drvdata(dev);
289
290 drm_kms_helper_poll_disable(rcdu->ddev);
291 /* TODO Suspend the CRTC */
292
293 return 0;
294 }
295
rcar_du_pm_resume(struct device * dev)296 static int rcar_du_pm_resume(struct device *dev)
297 {
298 struct rcar_du_device *rcdu = dev_get_drvdata(dev);
299
300 /* TODO Resume the CRTC */
301
302 drm_kms_helper_poll_enable(rcdu->ddev);
303 return 0;
304 }
305 #endif
306
307 static const struct dev_pm_ops rcar_du_pm_ops = {
308 SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
309 };
310
311 /* -----------------------------------------------------------------------------
312 * Platform driver
313 */
314
rcar_du_probe(struct platform_device * pdev)315 static int rcar_du_probe(struct platform_device *pdev)
316 {
317 return drm_platform_init(&rcar_du_driver, pdev);
318 }
319
rcar_du_remove(struct platform_device * pdev)320 static int rcar_du_remove(struct platform_device *pdev)
321 {
322 struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
323
324 drm_put_dev(rcdu->ddev);
325
326 return 0;
327 }
328
329 static struct platform_driver rcar_du_platform_driver = {
330 .probe = rcar_du_probe,
331 .remove = rcar_du_remove,
332 .driver = {
333 .owner = THIS_MODULE,
334 .name = "rcar-du",
335 .pm = &rcar_du_pm_ops,
336 .of_match_table = rcar_du_of_table,
337 },
338 .id_table = rcar_du_id_table,
339 };
340
341 module_platform_driver(rcar_du_platform_driver);
342
343 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
344 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
345 MODULE_LICENSE("GPL");
346