1 /*
2 * Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
3 * Copyright (C) 2017 Linaro Ltd.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 and
7 * only version 2 as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 */
15 #include <linux/clk.h>
16 #include <linux/init.h>
17 #include <linux/ioctl.h>
18 #include <linux/list.h>
19 #include <linux/module.h>
20 #include <linux/of_device.h>
21 #include <linux/platform_device.h>
22 #include <linux/slab.h>
23 #include <linux/types.h>
24 #include <linux/pm_runtime.h>
25 #include <media/videobuf2-v4l2.h>
26 #include <media/v4l2-mem2mem.h>
27 #include <media/v4l2-ioctl.h>
28
29 #include "core.h"
30 #include "vdec.h"
31 #include "venc.h"
32 #include "firmware.h"
33
venus_event_notify(struct venus_core * core,u32 event)34 static void venus_event_notify(struct venus_core *core, u32 event)
35 {
36 struct venus_inst *inst;
37
38 switch (event) {
39 case EVT_SYS_WATCHDOG_TIMEOUT:
40 case EVT_SYS_ERROR:
41 break;
42 default:
43 return;
44 }
45
46 mutex_lock(&core->lock);
47 core->sys_error = true;
48 list_for_each_entry(inst, &core->instances, list)
49 inst->ops->event_notify(inst, EVT_SESSION_ERROR, NULL);
50 mutex_unlock(&core->lock);
51
52 disable_irq_nosync(core->irq);
53
54 /*
55 * Delay recovery to ensure venus has completed any pending cache
56 * operations. Without this sleep, we see device reset when firmware is
57 * unloaded after a system error.
58 */
59 schedule_delayed_work(&core->work, msecs_to_jiffies(100));
60 }
61
62 static const struct hfi_core_ops venus_core_ops = {
63 .event_notify = venus_event_notify,
64 };
65
venus_sys_error_handler(struct work_struct * work)66 static void venus_sys_error_handler(struct work_struct *work)
67 {
68 struct venus_core *core =
69 container_of(work, struct venus_core, work.work);
70 int ret = 0;
71
72 dev_warn(core->dev, "system error has occurred, starting recovery!\n");
73
74 pm_runtime_get_sync(core->dev);
75
76 hfi_core_deinit(core, true);
77 hfi_destroy(core);
78 mutex_lock(&core->lock);
79 venus_shutdown(core->dev);
80
81 pm_runtime_put_sync(core->dev);
82
83 ret |= hfi_create(core, &venus_core_ops);
84
85 pm_runtime_get_sync(core->dev);
86
87 ret |= venus_boot(core->dev, core->res->fwname);
88
89 ret |= hfi_core_resume(core, true);
90
91 enable_irq(core->irq);
92
93 mutex_unlock(&core->lock);
94
95 ret |= hfi_core_init(core);
96
97 pm_runtime_put_sync(core->dev);
98
99 if (ret) {
100 disable_irq_nosync(core->irq);
101 dev_warn(core->dev, "recovery failed (%d)\n", ret);
102 schedule_delayed_work(&core->work, msecs_to_jiffies(10));
103 return;
104 }
105
106 mutex_lock(&core->lock);
107 core->sys_error = false;
108 mutex_unlock(&core->lock);
109 }
110
venus_clks_get(struct venus_core * core)111 static int venus_clks_get(struct venus_core *core)
112 {
113 const struct venus_resources *res = core->res;
114 struct device *dev = core->dev;
115 unsigned int i;
116
117 for (i = 0; i < res->clks_num; i++) {
118 core->clks[i] = devm_clk_get(dev, res->clks[i]);
119 if (IS_ERR(core->clks[i]))
120 return PTR_ERR(core->clks[i]);
121 }
122
123 return 0;
124 }
125
venus_clks_enable(struct venus_core * core)126 static int venus_clks_enable(struct venus_core *core)
127 {
128 const struct venus_resources *res = core->res;
129 unsigned int i;
130 int ret;
131
132 for (i = 0; i < res->clks_num; i++) {
133 ret = clk_prepare_enable(core->clks[i]);
134 if (ret)
135 goto err;
136 }
137
138 return 0;
139 err:
140 while (i--)
141 clk_disable_unprepare(core->clks[i]);
142
143 return ret;
144 }
145
venus_clks_disable(struct venus_core * core)146 static void venus_clks_disable(struct venus_core *core)
147 {
148 const struct venus_resources *res = core->res;
149 unsigned int i = res->clks_num;
150
151 while (i--)
152 clk_disable_unprepare(core->clks[i]);
153 }
154
venus_probe(struct platform_device * pdev)155 static int venus_probe(struct platform_device *pdev)
156 {
157 struct device *dev = &pdev->dev;
158 struct venus_core *core;
159 struct resource *r;
160 int ret;
161
162 core = devm_kzalloc(dev, sizeof(*core), GFP_KERNEL);
163 if (!core)
164 return -ENOMEM;
165
166 core->dev = dev;
167 platform_set_drvdata(pdev, core);
168
169 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
170 core->base = devm_ioremap_resource(dev, r);
171 if (IS_ERR(core->base))
172 return PTR_ERR(core->base);
173
174 core->irq = platform_get_irq(pdev, 0);
175 if (core->irq < 0)
176 return core->irq;
177
178 core->res = of_device_get_match_data(dev);
179 if (!core->res)
180 return -ENODEV;
181
182 ret = venus_clks_get(core);
183 if (ret)
184 return ret;
185
186 ret = dma_set_mask_and_coherent(dev, core->res->dma_mask);
187 if (ret)
188 return ret;
189
190 if (!dev->dma_parms) {
191 dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
192 GFP_KERNEL);
193 if (!dev->dma_parms)
194 return -ENOMEM;
195 }
196 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
197
198 INIT_LIST_HEAD(&core->instances);
199 mutex_init(&core->lock);
200 INIT_DELAYED_WORK(&core->work, venus_sys_error_handler);
201
202 ret = devm_request_threaded_irq(dev, core->irq, hfi_isr, hfi_isr_thread,
203 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
204 "venus", core);
205 if (ret)
206 return ret;
207
208 ret = hfi_create(core, &venus_core_ops);
209 if (ret)
210 return ret;
211
212 pm_runtime_enable(dev);
213
214 ret = pm_runtime_get_sync(dev);
215 if (ret < 0)
216 goto err_runtime_disable;
217
218 ret = venus_boot(dev, core->res->fwname);
219 if (ret)
220 goto err_runtime_disable;
221
222 ret = hfi_core_resume(core, true);
223 if (ret)
224 goto err_venus_shutdown;
225
226 ret = hfi_core_init(core);
227 if (ret)
228 goto err_venus_shutdown;
229
230 ret = v4l2_device_register(dev, &core->v4l2_dev);
231 if (ret)
232 goto err_core_deinit;
233
234 ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
235 if (ret)
236 goto err_dev_unregister;
237
238 ret = pm_runtime_put_sync(dev);
239 if (ret)
240 goto err_dev_unregister;
241
242 return 0;
243
244 err_dev_unregister:
245 v4l2_device_unregister(&core->v4l2_dev);
246 err_core_deinit:
247 hfi_core_deinit(core, false);
248 err_venus_shutdown:
249 venus_shutdown(dev);
250 err_runtime_disable:
251 pm_runtime_set_suspended(dev);
252 pm_runtime_disable(dev);
253 hfi_destroy(core);
254 return ret;
255 }
256
venus_remove(struct platform_device * pdev)257 static int venus_remove(struct platform_device *pdev)
258 {
259 struct venus_core *core = platform_get_drvdata(pdev);
260 struct device *dev = core->dev;
261 int ret;
262
263 ret = pm_runtime_get_sync(dev);
264 WARN_ON(ret < 0);
265
266 ret = hfi_core_deinit(core, true);
267 WARN_ON(ret);
268
269 hfi_destroy(core);
270 venus_shutdown(dev);
271 of_platform_depopulate(dev);
272
273 pm_runtime_put_sync(dev);
274 pm_runtime_disable(dev);
275
276 v4l2_device_unregister(&core->v4l2_dev);
277
278 return ret;
279 }
280
venus_runtime_suspend(struct device * dev)281 static __maybe_unused int venus_runtime_suspend(struct device *dev)
282 {
283 struct venus_core *core = dev_get_drvdata(dev);
284 int ret;
285
286 ret = hfi_core_suspend(core);
287
288 venus_clks_disable(core);
289
290 return ret;
291 }
292
venus_runtime_resume(struct device * dev)293 static __maybe_unused int venus_runtime_resume(struct device *dev)
294 {
295 struct venus_core *core = dev_get_drvdata(dev);
296 int ret;
297
298 ret = venus_clks_enable(core);
299 if (ret)
300 return ret;
301
302 ret = hfi_core_resume(core, false);
303 if (ret)
304 goto err_clks_disable;
305
306 return 0;
307
308 err_clks_disable:
309 venus_clks_disable(core);
310 return ret;
311 }
312
313 static const struct dev_pm_ops venus_pm_ops = {
314 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
315 pm_runtime_force_resume)
316 SET_RUNTIME_PM_OPS(venus_runtime_suspend, venus_runtime_resume, NULL)
317 };
318
319 static const struct freq_tbl msm8916_freq_table[] = {
320 { 352800, 228570000 }, /* 1920x1088 @ 30 + 1280x720 @ 30 */
321 { 244800, 160000000 }, /* 1920x1088 @ 30 */
322 { 108000, 100000000 }, /* 1280x720 @ 30 */
323 };
324
325 static const struct reg_val msm8916_reg_preset[] = {
326 { 0xe0020, 0x05555556 },
327 { 0xe0024, 0x05555556 },
328 { 0x80124, 0x00000003 },
329 };
330
331 static const struct venus_resources msm8916_res = {
332 .freq_tbl = msm8916_freq_table,
333 .freq_tbl_size = ARRAY_SIZE(msm8916_freq_table),
334 .reg_tbl = msm8916_reg_preset,
335 .reg_tbl_size = ARRAY_SIZE(msm8916_reg_preset),
336 .clks = { "core", "iface", "bus", },
337 .clks_num = 3,
338 .max_load = 352800, /* 720p@30 + 1080p@30 */
339 .hfi_version = HFI_VERSION_1XX,
340 .vmem_id = VIDC_RESOURCE_NONE,
341 .vmem_size = 0,
342 .vmem_addr = 0,
343 .dma_mask = 0xddc00000 - 1,
344 .fwname = "qcom/venus-1.8/venus.mdt",
345 };
346
347 static const struct freq_tbl msm8996_freq_table[] = {
348 { 1944000, 520000000 }, /* 4k UHD @ 60 (decode only) */
349 { 972000, 520000000 }, /* 4k UHD @ 30 */
350 { 489600, 346666667 }, /* 1080p @ 60 */
351 { 244800, 150000000 }, /* 1080p @ 30 */
352 { 108000, 75000000 }, /* 720p @ 30 */
353 };
354
355 static const struct reg_val msm8996_reg_preset[] = {
356 { 0x80010, 0xffffffff },
357 { 0x80018, 0x00001556 },
358 { 0x8001C, 0x00001556 },
359 };
360
361 static const struct venus_resources msm8996_res = {
362 .freq_tbl = msm8996_freq_table,
363 .freq_tbl_size = ARRAY_SIZE(msm8996_freq_table),
364 .reg_tbl = msm8996_reg_preset,
365 .reg_tbl_size = ARRAY_SIZE(msm8996_reg_preset),
366 .clks = {"core", "iface", "bus", "mbus" },
367 .clks_num = 4,
368 .max_load = 2563200,
369 .hfi_version = HFI_VERSION_3XX,
370 .vmem_id = VIDC_RESOURCE_NONE,
371 .vmem_size = 0,
372 .vmem_addr = 0,
373 .dma_mask = 0xddc00000 - 1,
374 .fwname = "qcom/venus-4.2/venus.mdt",
375 };
376
377 static const struct of_device_id venus_dt_match[] = {
378 { .compatible = "qcom,msm8916-venus", .data = &msm8916_res, },
379 { .compatible = "qcom,msm8996-venus", .data = &msm8996_res, },
380 { }
381 };
382 MODULE_DEVICE_TABLE(of, venus_dt_match);
383
384 static struct platform_driver qcom_venus_driver = {
385 .probe = venus_probe,
386 .remove = venus_remove,
387 .driver = {
388 .name = "qcom-venus",
389 .of_match_table = venus_dt_match,
390 .pm = &venus_pm_ops,
391 },
392 };
393 module_platform_driver(qcom_venus_driver);
394
395 MODULE_ALIAS("platform:qcom-venus");
396 MODULE_DESCRIPTION("Qualcomm Venus video encoder and decoder driver");
397 MODULE_LICENSE("GPL v2");
398