1
2
3
4
5
6#include <linux/clk.h>
7#include <linux/delay.h>
8#include <linux/iommu.h>
9#include <linux/module.h>
10#include <linux/of_device.h>
11#include <linux/pm_runtime.h>
12#include <linux/reset.h>
13
14#include <soc/tegra/common.h>
15
16#include "drm.h"
17#include "gem.h"
18#include "gr2d.h"
19
20enum {
21 RST_MC,
22 RST_GR2D,
23 RST_GR2D_MAX,
24};
25
26struct gr2d_soc {
27 unsigned int version;
28};
29
30struct gr2d {
31 struct tegra_drm_client client;
32 struct host1x_channel *channel;
33 struct clk *clk;
34
35 struct reset_control_bulk_data resets[RST_GR2D_MAX];
36 unsigned int nresets;
37
38 const struct gr2d_soc *soc;
39
40 DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS);
41};
42
43static inline struct gr2d *to_gr2d(struct tegra_drm_client *client)
44{
45 return container_of(client, struct gr2d, client);
46}
47
48static int gr2d_init(struct host1x_client *client)
49{
50 struct tegra_drm_client *drm = host1x_to_drm_client(client);
51 struct drm_device *dev = dev_get_drvdata(client->host);
52 unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
53 struct gr2d *gr2d = to_gr2d(drm);
54 int err;
55
56 gr2d->channel = host1x_channel_request(client);
57 if (!gr2d->channel)
58 return -ENOMEM;
59
60 client->syncpts[0] = host1x_syncpt_request(client, flags);
61 if (!client->syncpts[0]) {
62 err = -ENOMEM;
63 dev_err(client->dev, "failed to request syncpoint: %d\n", err);
64 goto put;
65 }
66
67 err = host1x_client_iommu_attach(client);
68 if (err < 0) {
69 dev_err(client->dev, "failed to attach to domain: %d\n", err);
70 goto free;
71 }
72
73 pm_runtime_enable(client->dev);
74 pm_runtime_use_autosuspend(client->dev);
75 pm_runtime_set_autosuspend_delay(client->dev, 200);
76
77 err = tegra_drm_register_client(dev->dev_private, drm);
78 if (err < 0) {
79 dev_err(client->dev, "failed to register client: %d\n", err);
80 goto disable_rpm;
81 }
82
83 return 0;
84
85disable_rpm:
86 pm_runtime_dont_use_autosuspend(client->dev);
87 pm_runtime_force_suspend(client->dev);
88
89 host1x_client_iommu_detach(client);
90free:
91 host1x_syncpt_put(client->syncpts[0]);
92put:
93 host1x_channel_put(gr2d->channel);
94 return err;
95}
96
97static int gr2d_exit(struct host1x_client *client)
98{
99 struct tegra_drm_client *drm = host1x_to_drm_client(client);
100 struct drm_device *dev = dev_get_drvdata(client->host);
101 struct tegra_drm *tegra = dev->dev_private;
102 struct gr2d *gr2d = to_gr2d(drm);
103 int err;
104
105 err = tegra_drm_unregister_client(tegra, drm);
106 if (err < 0)
107 return err;
108
109 pm_runtime_dont_use_autosuspend(client->dev);
110 pm_runtime_force_suspend(client->dev);
111
112 host1x_client_iommu_detach(client);
113 host1x_syncpt_put(client->syncpts[0]);
114 host1x_channel_put(gr2d->channel);
115
116 gr2d->channel = NULL;
117
118 return 0;
119}
120
121static const struct host1x_client_ops gr2d_client_ops = {
122 .init = gr2d_init,
123 .exit = gr2d_exit,
124};
125
126static int gr2d_open_channel(struct tegra_drm_client *client,
127 struct tegra_drm_context *context)
128{
129 struct gr2d *gr2d = to_gr2d(client);
130
131 context->channel = host1x_channel_get(gr2d->channel);
132 if (!context->channel)
133 return -ENOMEM;
134
135 return 0;
136}
137
138static void gr2d_close_channel(struct tegra_drm_context *context)
139{
140 host1x_channel_put(context->channel);
141}
142
143static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset)
144{
145 struct gr2d *gr2d = dev_get_drvdata(dev);
146
147 switch (class) {
148 case HOST1X_CLASS_HOST1X:
149 if (offset == 0x2b)
150 return 1;
151
152 break;
153
154 case HOST1X_CLASS_GR2D:
155 case HOST1X_CLASS_GR2D_SB:
156 if (offset >= GR2D_NUM_REGS)
157 break;
158
159 if (test_bit(offset, gr2d->addr_regs))
160 return 1;
161
162 break;
163 }
164
165 return 0;
166}
167
168static int gr2d_is_valid_class(u32 class)
169{
170 return (class == HOST1X_CLASS_GR2D ||
171 class == HOST1X_CLASS_GR2D_SB);
172}
173
174static const struct tegra_drm_client_ops gr2d_ops = {
175 .open_channel = gr2d_open_channel,
176 .close_channel = gr2d_close_channel,
177 .is_addr_reg = gr2d_is_addr_reg,
178 .is_valid_class = gr2d_is_valid_class,
179 .submit = tegra_drm_submit,
180};
181
182static const struct gr2d_soc tegra20_gr2d_soc = {
183 .version = 0x20,
184};
185
186static const struct gr2d_soc tegra30_gr2d_soc = {
187 .version = 0x30,
188};
189
190static const struct gr2d_soc tegra114_gr2d_soc = {
191 .version = 0x35,
192};
193
194static const struct of_device_id gr2d_match[] = {
195 { .compatible = "nvidia,tegra114-gr2d", .data = &tegra114_gr2d_soc },
196 { .compatible = "nvidia,tegra30-gr2d", .data = &tegra30_gr2d_soc },
197 { .compatible = "nvidia,tegra20-gr2d", .data = &tegra20_gr2d_soc },
198 { },
199};
200MODULE_DEVICE_TABLE(of, gr2d_match);
201
202static const u32 gr2d_addr_regs[] = {
203 GR2D_UA_BASE_ADDR,
204 GR2D_VA_BASE_ADDR,
205 GR2D_PAT_BASE_ADDR,
206 GR2D_DSTA_BASE_ADDR,
207 GR2D_DSTB_BASE_ADDR,
208 GR2D_DSTC_BASE_ADDR,
209 GR2D_SRCA_BASE_ADDR,
210 GR2D_SRCB_BASE_ADDR,
211 GR2D_PATBASE_ADDR,
212 GR2D_SRC_BASE_ADDR_SB,
213 GR2D_DSTA_BASE_ADDR_SB,
214 GR2D_DSTB_BASE_ADDR_SB,
215 GR2D_UA_BASE_ADDR_SB,
216 GR2D_VA_BASE_ADDR_SB,
217};
218
219static int gr2d_get_resets(struct device *dev, struct gr2d *gr2d)
220{
221 int err;
222
223 gr2d->resets[RST_MC].id = "mc";
224 gr2d->resets[RST_GR2D].id = "2d";
225 gr2d->nresets = RST_GR2D_MAX;
226
227 err = devm_reset_control_bulk_get_optional_exclusive_released(
228 dev, gr2d->nresets, gr2d->resets);
229 if (err) {
230 dev_err(dev, "failed to get reset: %d\n", err);
231 return err;
232 }
233
234 if (WARN_ON(!gr2d->resets[RST_GR2D].rstc))
235 return -ENOENT;
236
237 return 0;
238}
239
240static int gr2d_probe(struct platform_device *pdev)
241{
242 struct device *dev = &pdev->dev;
243 struct host1x_syncpt **syncpts;
244 struct gr2d *gr2d;
245 unsigned int i;
246 int err;
247
248 gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
249 if (!gr2d)
250 return -ENOMEM;
251
252 platform_set_drvdata(pdev, gr2d);
253
254 gr2d->soc = of_device_get_match_data(dev);
255
256 syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
257 if (!syncpts)
258 return -ENOMEM;
259
260 gr2d->clk = devm_clk_get(dev, NULL);
261 if (IS_ERR(gr2d->clk)) {
262 dev_err(dev, "cannot get clock\n");
263 return PTR_ERR(gr2d->clk);
264 }
265
266 err = gr2d_get_resets(dev, gr2d);
267 if (err)
268 return err;
269
270 INIT_LIST_HEAD(&gr2d->client.base.list);
271 gr2d->client.base.ops = &gr2d_client_ops;
272 gr2d->client.base.dev = dev;
273 gr2d->client.base.class = HOST1X_CLASS_GR2D;
274 gr2d->client.base.syncpts = syncpts;
275 gr2d->client.base.num_syncpts = 1;
276
277 INIT_LIST_HEAD(&gr2d->client.list);
278 gr2d->client.version = gr2d->soc->version;
279 gr2d->client.ops = &gr2d_ops;
280
281 err = devm_tegra_core_dev_init_opp_table_common(dev);
282 if (err)
283 return err;
284
285 err = host1x_client_register(&gr2d->client.base);
286 if (err < 0) {
287 dev_err(dev, "failed to register host1x client: %d\n", err);
288 return err;
289 }
290
291
292 for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++)
293 set_bit(gr2d_addr_regs[i], gr2d->addr_regs);
294
295 return 0;
296}
297
298static int gr2d_remove(struct platform_device *pdev)
299{
300 struct gr2d *gr2d = platform_get_drvdata(pdev);
301 int err;
302
303 err = host1x_client_unregister(&gr2d->client.base);
304 if (err < 0) {
305 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
306 err);
307 return err;
308 }
309
310 return 0;
311}
312
313static int __maybe_unused gr2d_runtime_suspend(struct device *dev)
314{
315 struct gr2d *gr2d = dev_get_drvdata(dev);
316 int err;
317
318 host1x_channel_stop(gr2d->channel);
319 reset_control_bulk_release(gr2d->nresets, gr2d->resets);
320
321
322
323
324
325
326
327
328
329
330
331
332
333 err = reset_control_acquire(gr2d->resets[RST_MC].rstc);
334 if (err) {
335 dev_err(dev, "failed to acquire MC reset: %d\n", err);
336 goto acquire_reset;
337 }
338
339 err = reset_control_assert(gr2d->resets[RST_MC].rstc);
340 reset_control_release(gr2d->resets[RST_MC].rstc);
341 if (err) {
342 dev_err(dev, "failed to assert MC reset: %d\n", err);
343 goto acquire_reset;
344 }
345
346 clk_disable_unprepare(gr2d->clk);
347
348 return 0;
349
350acquire_reset:
351 reset_control_bulk_acquire(gr2d->nresets, gr2d->resets);
352 reset_control_bulk_deassert(gr2d->nresets, gr2d->resets);
353
354 return err;
355}
356
357static int __maybe_unused gr2d_runtime_resume(struct device *dev)
358{
359 struct gr2d *gr2d = dev_get_drvdata(dev);
360 int err;
361
362 err = reset_control_bulk_acquire(gr2d->nresets, gr2d->resets);
363 if (err) {
364 dev_err(dev, "failed to acquire reset: %d\n", err);
365 return err;
366 }
367
368 err = clk_prepare_enable(gr2d->clk);
369 if (err) {
370 dev_err(dev, "failed to enable clock: %d\n", err);
371 goto release_reset;
372 }
373
374 usleep_range(2000, 4000);
375
376
377 err = reset_control_bulk_deassert(gr2d->nresets, gr2d->resets);
378 if (err) {
379 dev_err(dev, "failed to deassert reset: %d\n", err);
380 goto disable_clk;
381 }
382
383 return 0;
384
385disable_clk:
386 clk_disable_unprepare(gr2d->clk);
387release_reset:
388 reset_control_bulk_release(gr2d->nresets, gr2d->resets);
389
390 return err;
391}
392
393static const struct dev_pm_ops tegra_gr2d_pm = {
394 SET_RUNTIME_PM_OPS(gr2d_runtime_suspend, gr2d_runtime_resume, NULL)
395 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
396 pm_runtime_force_resume)
397};
398
399struct platform_driver tegra_gr2d_driver = {
400 .driver = {
401 .name = "tegra-gr2d",
402 .of_match_table = gr2d_match,
403 .pm = &tegra_gr2d_pm,
404 },
405 .probe = gr2d_probe,
406 .remove = gr2d_remove,
407};
408
