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