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_get_sync(tidss->dev);
  36         WARN_ON(r < 0);
  37         return r < 0 ? r : 0;
  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         r = pm_runtime_put_sync(tidss->dev);
  47         WARN_ON(r < 0);
  48 }
  49
  50 static int __maybe_unused tidss_pm_runtime_suspend(struct device *dev)
  51 {
  52         struct tidss_device *tidss = dev_get_drvdata(dev);
  53
  54         dev_dbg(dev, "%s\n", __func__);
  55
  56         return dispc_runtime_suspend(tidss->dispc);
  57 }
  58
  59 static int __maybe_unused tidss_pm_runtime_resume(struct device *dev)
  60 {
  61         struct tidss_device *tidss = dev_get_drvdata(dev);
  62         int r;
  63
  64         dev_dbg(dev, "%s\n", __func__);
  65
  66         r = dispc_runtime_resume(tidss->dispc);
  67         if (r)
  68                 return r;
  69
  70         return 0;
  71 }
  72
  73 static int __maybe_unused tidss_suspend(struct device *dev)
  74 {
  75         struct tidss_device *tidss = dev_get_drvdata(dev);
  76
  77         dev_dbg(dev, "%s\n", __func__);
  78
  79         return drm_mode_config_helper_suspend(&tidss->ddev);
  80 }
  81
  82 static int __maybe_unused tidss_resume(struct device *dev)
  83 {
  84         struct tidss_device *tidss = dev_get_drvdata(dev);
  85
  86         dev_dbg(dev, "%s\n", __func__);
  87
  88         return drm_mode_config_helper_resume(&tidss->ddev);
  89 }
  90
  91 static __maybe_unused const struct dev_pm_ops tidss_pm_ops = {
  92         SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume)
  93         SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL)
  94 };
  95
  96 /* DRM device Information */
  97
  98 static void tidss_release(struct drm_device *ddev)
  99 {
 100         drm_kms_helper_poll_fini(ddev);
 101 }
 102
 103 DEFINE_DRM_GEM_DMA_FOPS(tidss_fops);
 104
 105 static const struct drm_driver tidss_driver = {
 106         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 107         .fops                   = &tidss_fops,
 108         .release                = tidss_release,
 109         DRM_GEM_DMA_DRIVER_OPS_VMAP,
 110         .name                   = "tidss",
 111         .desc                   = "TI Keystone DSS",
 112         .date                   = "20180215",
 113         .major                  = 1,
 114         .minor                  = 0,
 115 };
 116
 117 static int tidss_probe(struct platform_device *pdev)
 118 {
 119         struct device *dev = &pdev->dev;
 120         struct tidss_device *tidss;
 121         struct drm_device *ddev;
 122         int ret;
 123         int irq;
 124
 125         dev_dbg(dev, "%s\n", __func__);
 126
 127         tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver,
 128                                    struct tidss_device, ddev);
 129         if (IS_ERR(tidss))
 130                 return PTR_ERR(tidss);
 131
 132         ddev = &tidss->ddev;
 133
 134         tidss->dev = dev;
 135         tidss->feat = of_device_get_match_data(dev);
 136
 137         platform_set_drvdata(pdev, tidss);
 138
 139         ret = dispc_init(tidss);
 140         if (ret) {
 141                 dev_err(dev, "failed to initialize dispc: %d\n", ret);
 142                 return ret;
 143         }
 144
 145         pm_runtime_enable(dev);
 146
 147 #ifndef CONFIG_PM
 148         /* If we don't have PM, we need to call resume manually */
 149         dispc_runtime_resume(tidss->dispc);
 150 #endif
 151
 152         ret = tidss_modeset_init(tidss);
 153         if (ret < 0) {
 154                 if (ret != -EPROBE_DEFER)
 155                         dev_err(dev, "failed to init DRM/KMS (%d)\n", ret);
 156                 goto err_runtime_suspend;
 157         }
 158
 159         irq = platform_get_irq(pdev, 0);
 160         if (irq < 0) {
 161                 ret = irq;
 162                 goto err_runtime_suspend;
 163         }
 164         tidss->irq = irq;
 165
 166         ret = tidss_irq_install(ddev, irq);
 167         if (ret) {
 168                 dev_err(dev, "tidss_irq_install failed: %d\n", ret);
 169                 goto err_runtime_suspend;
 170         }
 171
 172         drm_kms_helper_poll_init(ddev);
 173
 174         drm_mode_config_reset(ddev);
 175
 176         ret = drm_dev_register(ddev, 0);
 177         if (ret) {
 178                 dev_err(dev, "failed to register DRM device\n");
 179                 goto err_irq_uninstall;
 180         }
 181
 182         drm_fbdev_dma_setup(ddev, 32);
 183
 184         dev_dbg(dev, "%s done\n", __func__);
 185
 186         return 0;
 187
 188 err_irq_uninstall:
 189         tidss_irq_uninstall(ddev);
 190
 191 err_runtime_suspend:
 192 #ifndef CONFIG_PM
 193         dispc_runtime_suspend(tidss->dispc);
 194 #endif
 195         pm_runtime_disable(dev);
 196
 197         return ret;
 198 }
 199
 200 static void tidss_remove(struct platform_device *pdev)
 201 {
 202         struct device *dev = &pdev->dev;
 203         struct tidss_device *tidss = platform_get_drvdata(pdev);
 204         struct drm_device *ddev = &tidss->ddev;
 205
 206         dev_dbg(dev, "%s\n", __func__);
 207
 208         drm_dev_unregister(ddev);
 209
 210         drm_atomic_helper_shutdown(ddev);
 211
 212         tidss_irq_uninstall(ddev);
 213
 214 #ifndef CONFIG_PM
 215         /* If we don't have PM, we need to call suspend manually */
 216         dispc_runtime_suspend(tidss->dispc);
 217 #endif
 218         pm_runtime_disable(dev);
 219
 220         /* devm allocated dispc goes away with the dev so mark it NULL */
 221         dispc_remove(tidss);
 222
 223         dev_dbg(dev, "%s done\n", __func__);
 224 }
 225
 226 static void tidss_shutdown(struct platform_device *pdev)
 227 {
 228         drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
 229 }
 230
 231 static const struct of_device_id tidss_of_table[] = {
 232         { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, },
 233         { .compatible = "ti,am625-dss", .data = &dispc_am625_feats, },
 234         { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, },
 235         { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, },
 236         { }
 237 };
 238
 239 MODULE_DEVICE_TABLE(of, tidss_of_table);
 240
 241 static struct platform_driver tidss_platform_driver = {
 242         .probe          = tidss_probe,
 243         .remove_new     = tidss_remove,
 244         .shutdown       = tidss_shutdown,
 245         .driver         = {
 246                 .name   = "tidss",
 247                 .pm     = pm_ptr(&tidss_pm_ops),
 248                 .of_match_table = tidss_of_table,
 249                 .suppress_bind_attrs = true,
 250         },
 251 };
 252
 253 drm_module_platform_driver(tidss_platform_driver);
 254
 255 MODULE_AUTHOR("Tomi Valkeinen <[email protected]>");
 256 MODULE_DESCRIPTION("TI Keystone DSS Driver");
 257 MODULE_LICENSE("GPL v2");