drivers/gpu/drm/tidss/tidss_drv.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
   4  * Author: Tomi Valkeinen <[email protected]>
   5  */
   6
   7 #include <linux/console.h>
   8 #include <linux/of.h>
   9 #include <linux/module.h>
  10 #include <linux/pm_runtime.h>
  11
  12 #include <drm/drm_atomic.h>
  13 #include <drm/drm_atomic_helper.h>
  14 #include <drm/drm_crtc.h>
  15 #include <drm/drm_drv.h>
  16 #include <drm/drm_fbdev_dma.h>
  17 #include <drm/drm_gem_dma_helper.h>
  18 #include <drm/drm_managed.h>
  19 #include <drm/drm_module.h>
  20 #include <drm/drm_probe_helper.h>
  21
  22 #include "tidss_dispc.h"
  23 #include "tidss_drv.h"
  24 #include "tidss_kms.h"
  25 #include "tidss_irq.h"
  26
  27 /* Power management */
  28
  29 int tidss_runtime_get(struct tidss_device *tidss)
  30 {
  31         int r;
  32
  33         dev_dbg(tidss->dev, "%s\n", __func__);
  34
  35         r = pm_runtime_resume_and_get(tidss->dev);
  36         WARN_ON(r < 0);
  37         return r;
  38 }
  39
  40 void tidss_runtime_put(struct tidss_device *tidss)
  41 {
  42         int r;
  43
  44         dev_dbg(tidss->dev, "%s\n", __func__);
  45
  46         pm_runtime_mark_last_busy(tidss->dev);
  47
  48         r = pm_runtime_put_autosuspend(tidss->dev);
  49         WARN_ON(r < 0);
  50 }
  51
  52 static int __maybe_unused tidss_pm_runtime_suspend(struct device *dev)
  53 {
  54         struct tidss_device *tidss = dev_get_drvdata(dev);
  55
  56         dev_dbg(dev, "%s\n", __func__);
  57
  58         return dispc_runtime_suspend(tidss->dispc);
  59 }
  60
  61 static int __maybe_unused tidss_pm_runtime_resume(struct device *dev)
  62 {
  63         struct tidss_device *tidss = dev_get_drvdata(dev);
  64         int r;
  65
  66         dev_dbg(dev, "%s\n", __func__);
  67
  68         r = dispc_runtime_resume(tidss->dispc);
  69         if (r)
  70                 return r;
  71
  72         return 0;
  73 }
  74
  75 static int __maybe_unused tidss_suspend(struct device *dev)
  76 {
  77         struct tidss_device *tidss = dev_get_drvdata(dev);
  78
  79         dev_dbg(dev, "%s\n", __func__);
  80
  81         return drm_mode_config_helper_suspend(&tidss->ddev);
  82 }
  83
  84 static int __maybe_unused tidss_resume(struct device *dev)
  85 {
  86         struct tidss_device *tidss = dev_get_drvdata(dev);
  87
  88         dev_dbg(dev, "%s\n", __func__);
  89
  90         return drm_mode_config_helper_resume(&tidss->ddev);
  91 }
  92
  93 static __maybe_unused const struct dev_pm_ops tidss_pm_ops = {
  94         SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume)
  95         SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL)
  96 };
  97
  98 /* DRM device Information */
  99
 100 static void tidss_release(struct drm_device *ddev)
 101 {
 102         drm_kms_helper_poll_fini(ddev);
 103 }
 104
 105 DEFINE_DRM_GEM_DMA_FOPS(tidss_fops);
 106
 107 static const struct drm_driver tidss_driver = {
 108         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 109         .fops                   = &tidss_fops,
 110         .release                = tidss_release,
 111         DRM_GEM_DMA_DRIVER_OPS_VMAP,
 112         .name                   = "tidss",
 113         .desc                   = "TI Keystone DSS",
 114         .date                   = "20180215",
 115         .major                  = 1,
 116         .minor                  = 0,
 117 };
 118
 119 static int tidss_probe(struct platform_device *pdev)
 120 {
 121         struct device *dev = &pdev->dev;
 122         struct tidss_device *tidss;
 123         struct drm_device *ddev;
 124         int ret;
 125         int irq;
 126
 127         dev_dbg(dev, "%s\n", __func__);
 128
 129         tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver,
 130                                    struct tidss_device, ddev);
 131         if (IS_ERR(tidss))
 132                 return PTR_ERR(tidss);
 133
 134         ddev = &tidss->ddev;
 135
 136         tidss->dev = dev;
 137         tidss->feat = of_device_get_match_data(dev);
 138
 139         platform_set_drvdata(pdev, tidss);
 140
 141         spin_lock_init(&tidss->wait_lock);
 142
 143         ret = dispc_init(tidss);
 144         if (ret) {
 145                 dev_err(dev, "failed to initialize dispc: %d\n", ret);
 146                 return ret;
 147         }
 148
 149         pm_runtime_enable(dev);
 150
 151         pm_runtime_set_autosuspend_delay(dev, 1000);
 152         pm_runtime_use_autosuspend(dev);
 153
 154 #ifndef CONFIG_PM
 155         /* If we don't have PM, we need to call resume manually */
 156         dispc_runtime_resume(tidss->dispc);
 157 #endif
 158
 159         ret = tidss_modeset_init(tidss);
 160         if (ret < 0) {
 161                 if (ret != -EPROBE_DEFER)
 162                         dev_err(dev, "failed to init DRM/KMS (%d)\n", ret);
 163                 goto err_runtime_suspend;
 164         }
 165
 166         irq = platform_get_irq(pdev, 0);
 167         if (irq < 0) {
 168                 ret = irq;
 169                 goto err_runtime_suspend;
 170         }
 171         tidss->irq = irq;
 172
 173         ret = tidss_irq_install(ddev, irq);
 174         if (ret) {
 175                 dev_err(dev, "tidss_irq_install failed: %d\n", ret);
 176                 goto err_runtime_suspend;
 177         }
 178
 179         drm_kms_helper_poll_init(ddev);
 180
 181         drm_mode_config_reset(ddev);
 182
 183         ret = drm_dev_register(ddev, 0);
 184         if (ret) {
 185                 dev_err(dev, "failed to register DRM device\n");
 186                 goto err_irq_uninstall;
 187         }
 188
 189         drm_fbdev_dma_setup(ddev, 32);
 190
 191         dev_dbg(dev, "%s done\n", __func__);
 192
 193         return 0;
 194
 195 err_irq_uninstall:
 196         tidss_irq_uninstall(ddev);
 197
 198 err_runtime_suspend:
 199 #ifndef CONFIG_PM
 200         dispc_runtime_suspend(tidss->dispc);
 201 #endif
 202         pm_runtime_dont_use_autosuspend(dev);
 203         pm_runtime_disable(dev);
 204
 205         return ret;
 206 }
 207
 208 static void tidss_remove(struct platform_device *pdev)
 209 {
 210         struct device *dev = &pdev->dev;
 211         struct tidss_device *tidss = platform_get_drvdata(pdev);
 212         struct drm_device *ddev = &tidss->ddev;
 213
 214         dev_dbg(dev, "%s\n", __func__);
 215
 216         drm_dev_unregister(ddev);
 217
 218         drm_atomic_helper_shutdown(ddev);
 219
 220         tidss_irq_uninstall(ddev);
 221
 222 #ifndef CONFIG_PM
 223         /* If we don't have PM, we need to call suspend manually */
 224         dispc_runtime_suspend(tidss->dispc);
 225 #endif
 226         pm_runtime_dont_use_autosuspend(dev);
 227         pm_runtime_disable(dev);
 228
 229         /* devm allocated dispc goes away with the dev so mark it NULL */
 230         dispc_remove(tidss);
 231
 232         dev_dbg(dev, "%s done\n", __func__);
 233 }
 234
 235 static void tidss_shutdown(struct platform_device *pdev)
 236 {
 237         drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
 238 }
 239
 240 static const struct of_device_id tidss_of_table[] = {
 241         { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, },
 242         { .compatible = "ti,am625-dss", .data = &dispc_am625_feats, },
 243         { .compatible = "ti,am62a7-dss", .data = &dispc_am62a7_feats, },
 244         { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, },
 245         { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, },
 246         { }
 247 };
 248
 249 MODULE_DEVICE_TABLE(of, tidss_of_table);
 250
 251 static struct platform_driver tidss_platform_driver = {
 252         .probe          = tidss_probe,
 253         .remove_new     = tidss_remove,
 254         .shutdown       = tidss_shutdown,
 255         .driver         = {
 256                 .name   = "tidss",
 257                 .pm     = pm_ptr(&tidss_pm_ops),
 258                 .of_match_table = tidss_of_table,
 259                 .suppress_bind_attrs = true,
 260         },
 261 };
 262
 263 drm_module_platform_driver(tidss_platform_driver);
 264
 265 MODULE_AUTHOR("Tomi Valkeinen <[email protected]>");
 266 MODULE_DESCRIPTION("TI Keystone DSS Driver");
 267 MODULE_LICENSE("GPL v2");