drivers/media/platform/qcom/venus/core.c

   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
  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
  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
 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
 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
 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
 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         INIT_LIST_HEAD(&core->instances);
 191         mutex_init(&core->lock);
 192         INIT_DELAYED_WORK(&core->work, venus_sys_error_handler);
 193
 194         ret = devm_request_threaded_irq(dev, core->irq, hfi_isr, hfi_isr_thread,
 195                                         IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
 196                                         "venus", core);
 197         if (ret)
 198                 return ret;
 199
 200         ret = hfi_create(core, &venus_core_ops);
 201         if (ret)
 202                 return ret;
 203
 204         pm_runtime_enable(dev);
 205
 206         ret = pm_runtime_get_sync(dev);
 207         if (ret < 0)
 208                 goto err_runtime_disable;
 209
 210         ret = venus_boot(dev, core->res->fwname);
 211         if (ret)
 212                 goto err_runtime_disable;
 213
 214         ret = hfi_core_resume(core, true);
 215         if (ret)
 216                 goto err_venus_shutdown;
 217
 218         ret = hfi_core_init(core);
 219         if (ret)
 220                 goto err_venus_shutdown;
 221
 222         ret = v4l2_device_register(dev, &core->v4l2_dev);
 223         if (ret)
 224                 goto err_core_deinit;
 225
 226         ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
 227         if (ret)
 228                 goto err_dev_unregister;
 229
 230         ret = pm_runtime_put_sync(dev);
 231         if (ret)
 232                 goto err_dev_unregister;
 233
 234         return 0;
 235
 236 err_dev_unregister:
 237         v4l2_device_unregister(&core->v4l2_dev);
 238 err_core_deinit:
 239         hfi_core_deinit(core, false);
 240 err_venus_shutdown:
 241         venus_shutdown(dev);
 242 err_runtime_disable:
 243         pm_runtime_set_suspended(dev);
 244         pm_runtime_disable(dev);
 245         hfi_destroy(core);
 246         return ret;
 247 }
 248
 249 static int venus_remove(struct platform_device *pdev)
 250 {
 251         struct venus_core *core = platform_get_drvdata(pdev);
 252         struct device *dev = core->dev;
 253         int ret;
 254
 255         ret = pm_runtime_get_sync(dev);
 256         WARN_ON(ret < 0);
 257
 258         ret = hfi_core_deinit(core, true);
 259         WARN_ON(ret);
 260
 261         hfi_destroy(core);
 262         venus_shutdown(dev);
 263         of_platform_depopulate(dev);
 264
 265         pm_runtime_put_sync(dev);
 266         pm_runtime_disable(dev);
 267
 268         v4l2_device_unregister(&core->v4l2_dev);
 269
 270         return ret;
 271 }
 272
 273 static __maybe_unused int venus_runtime_suspend(struct device *dev)
 274 {
 275         struct venus_core *core = dev_get_drvdata(dev);
 276         int ret;
 277
 278         ret = hfi_core_suspend(core);
 279
 280         venus_clks_disable(core);
 281
 282         return ret;
 283 }
 284
 285 static __maybe_unused int venus_runtime_resume(struct device *dev)
 286 {
 287         struct venus_core *core = dev_get_drvdata(dev);
 288         int ret;
 289
 290         ret = venus_clks_enable(core);
 291         if (ret)
 292                 return ret;
 293
 294         ret = hfi_core_resume(core, false);
 295         if (ret)
 296                 goto err_clks_disable;
 297
 298         return 0;
 299
 300 err_clks_disable:
 301         venus_clks_disable(core);
 302         return ret;
 303 }
 304
 305 static const struct dev_pm_ops venus_pm_ops = {
 306         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 307                                 pm_runtime_force_resume)
 308         SET_RUNTIME_PM_OPS(venus_runtime_suspend, venus_runtime_resume, NULL)
 309 };
 310
 311 static const struct freq_tbl msm8916_freq_table[] = {
 312         { 352800, 228570000 },  /* 1920x1088 @ 30 + 1280x720 @ 30 */
 313         { 244800, 160000000 },  /* 1920x1088 @ 30 */
 314         { 108000, 100000000 },  /* 1280x720 @ 30 */
 315 };
 316
 317 static const struct reg_val msm8916_reg_preset[] = {
 318         { 0xe0020, 0x05555556 },
 319         { 0xe0024, 0x05555556 },
 320         { 0x80124, 0x00000003 },
 321 };
 322
 323 static const struct venus_resources msm8916_res = {
 324         .freq_tbl = msm8916_freq_table,
 325         .freq_tbl_size = ARRAY_SIZE(msm8916_freq_table),
 326         .reg_tbl = msm8916_reg_preset,
 327         .reg_tbl_size = ARRAY_SIZE(msm8916_reg_preset),
 328         .clks = { "core", "iface", "bus", },
 329         .clks_num = 3,
 330         .max_load = 352800, /* 720p@30 + 1080p@30 */
 331         .hfi_version = HFI_VERSION_1XX,
 332         .vmem_id = VIDC_RESOURCE_NONE,
 333         .vmem_size = 0,
 334         .vmem_addr = 0,
 335         .dma_mask = 0xddc00000 - 1,
 336         .fwname = "qcom/venus-1.8/venus.mdt",
 337 };
 338
 339 static const struct freq_tbl msm8996_freq_table[] = {
 340         { 1944000, 490000000 }, /* 4k UHD @ 60 */
 341         {  972000, 320000000 }, /* 4k UHD @ 30 */
 342         {  489600, 150000000 }, /* 1080p @ 60 */
 343         {  244800,  75000000 }, /* 1080p @ 30 */
 344 };
 345
 346 static const struct reg_val msm8996_reg_preset[] = {
 347         { 0x80010, 0xffffffff },
 348         { 0x80018, 0x00001556 },
 349         { 0x8001C, 0x00001556 },
 350 };
 351
 352 static const struct venus_resources msm8996_res = {
 353         .freq_tbl = msm8996_freq_table,
 354         .freq_tbl_size = ARRAY_SIZE(msm8996_freq_table),
 355         .reg_tbl = msm8996_reg_preset,
 356         .reg_tbl_size = ARRAY_SIZE(msm8996_reg_preset),
 357         .clks = {"core", "iface", "bus", "mbus" },
 358         .clks_num = 4,
 359         .max_load = 2563200,
 360         .hfi_version = HFI_VERSION_3XX,
 361         .vmem_id = VIDC_RESOURCE_NONE,
 362         .vmem_size = 0,
 363         .vmem_addr = 0,
 364         .dma_mask = 0xddc00000 - 1,
 365         .fwname = "qcom/venus-4.2/venus.mdt",
 366 };
 367
 368 static const struct of_device_id venus_dt_match[] = {
 369         { .compatible = "qcom,msm8916-venus", .data = &msm8916_res, },
 370         { .compatible = "qcom,msm8996-venus", .data = &msm8996_res, },
 371         { }
 372 };
 373 MODULE_DEVICE_TABLE(of, venus_dt_match);
 374
 375 static struct platform_driver qcom_venus_driver = {
 376         .probe = venus_probe,
 377         .remove = venus_remove,
 378         .driver = {
 379                 .name = "qcom-venus",
 380                 .of_match_table = venus_dt_match,
 381                 .pm = &venus_pm_ops,
 382         },
 383 };
 384 module_platform_driver(qcom_venus_driver);
 385
 386 MODULE_ALIAS("platform:qcom-venus");
 387 MODULE_DESCRIPTION("Qualcomm Venus video encoder and decoder driver");
 388 MODULE_LICENSE("GPL v2");