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_device.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_crtc_helper.h>
  16 #include <drm/drm_drv.h>
  17 #include <drm/drm_fb_helper.h>
  18 #include <drm/drm_gem_cma_helper.h>
  19 #include <drm/drm_irq.h>
  20 #include <drm/drm_managed.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_get_sync(tidss->dev);
  37         WARN_ON(r < 0);
  38         return r < 0 ? r : 0;
  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         r = pm_runtime_put_sync(tidss->dev);
  48         WARN_ON(r < 0);
  49 }
  50
  51 static int __maybe_unused tidss_pm_runtime_suspend(struct device *dev)
  52 {
  53         struct tidss_device *tidss = dev_get_drvdata(dev);
  54
  55         dev_dbg(dev, "%s\n", __func__);
  56
  57         return dispc_runtime_suspend(tidss->dispc);
  58 }
  59
  60 static int __maybe_unused tidss_pm_runtime_resume(struct device *dev)
  61 {
  62         struct tidss_device *tidss = dev_get_drvdata(dev);
  63         int r;
  64
  65         dev_dbg(dev, "%s\n", __func__);
  66
  67         r = dispc_runtime_resume(tidss->dispc);
  68         if (r)
  69                 return r;
  70
  71         return 0;
  72 }
  73
  74 static int __maybe_unused tidss_suspend(struct device *dev)
  75 {
  76         struct tidss_device *tidss = dev_get_drvdata(dev);
  77
  78         dev_dbg(dev, "%s\n", __func__);
  79
  80         return drm_mode_config_helper_suspend(&tidss->ddev);
  81 }
  82
  83 static int __maybe_unused tidss_resume(struct device *dev)
  84 {
  85         struct tidss_device *tidss = dev_get_drvdata(dev);
  86
  87         dev_dbg(dev, "%s\n", __func__);
  88
  89         return drm_mode_config_helper_resume(&tidss->ddev);
  90 }
  91
  92 #ifdef CONFIG_PM
  93
  94 static const struct dev_pm_ops tidss_pm_ops = {
  95         .runtime_suspend = tidss_pm_runtime_suspend,
  96         .runtime_resume = tidss_pm_runtime_resume,
  97         SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume)
  98 };
  99
 100 #endif /* CONFIG_PM */
 101
 102 /* DRM device Information */
 103
 104 static void tidss_release(struct drm_device *ddev)
 105 {
 106         drm_kms_helper_poll_fini(ddev);
 107 }
 108
 109 DEFINE_DRM_GEM_CMA_FOPS(tidss_fops);
 110
 111 static const struct drm_driver tidss_driver = {
 112         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 113         .fops                   = &tidss_fops,
 114         .release                = tidss_release,
 115         DRM_GEM_CMA_DRIVER_OPS_VMAP,
 116         .name                   = "tidss",
 117         .desc                   = "TI Keystone DSS",
 118         .date                   = "20180215",
 119         .major                  = 1,
 120         .minor                  = 0,
 121
 122         .irq_preinstall         = tidss_irq_preinstall,
 123         .irq_postinstall        = tidss_irq_postinstall,
 124         .irq_handler            = tidss_irq_handler,
 125         .irq_uninstall          = tidss_irq_uninstall,
 126 };
 127
 128 static int tidss_probe(struct platform_device *pdev)
 129 {
 130         struct device *dev = &pdev->dev;
 131         struct tidss_device *tidss;
 132         struct drm_device *ddev;
 133         int ret;
 134         int irq;
 135
 136         dev_dbg(dev, "%s\n", __func__);
 137
 138         tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver,
 139                                    struct tidss_device, ddev);
 140         if (IS_ERR(tidss))
 141                 return PTR_ERR(tidss);
 142
 143         ddev = &tidss->ddev;
 144
 145         tidss->dev = dev;
 146         tidss->feat = of_device_get_match_data(dev);
 147
 148         platform_set_drvdata(pdev, tidss);
 149
 150         ret = dispc_init(tidss);
 151         if (ret) {
 152                 dev_err(dev, "failed to initialize dispc: %d\n", ret);
 153                 return ret;
 154         }
 155
 156         pm_runtime_enable(dev);
 157
 158 #ifndef CONFIG_PM
 159         /* If we don't have PM, we need to call resume manually */
 160         dispc_runtime_resume(tidss->dispc);
 161 #endif
 162
 163         ret = tidss_modeset_init(tidss);
 164         if (ret < 0) {
 165                 if (ret != -EPROBE_DEFER)
 166                         dev_err(dev, "failed to init DRM/KMS (%d)\n", ret);
 167                 goto err_runtime_suspend;
 168         }
 169
 170         irq = platform_get_irq(pdev, 0);
 171         if (irq < 0) {
 172                 ret = irq;
 173                 goto err_runtime_suspend;
 174         }
 175
 176         ret = drm_irq_install(ddev, irq);
 177         if (ret) {
 178                 dev_err(dev, "drm_irq_install failed: %d\n", ret);
 179                 goto err_runtime_suspend;
 180         }
 181
 182         drm_kms_helper_poll_init(ddev);
 183
 184         drm_mode_config_reset(ddev);
 185
 186         ret = drm_dev_register(ddev, 0);
 187         if (ret) {
 188                 dev_err(dev, "failed to register DRM device\n");
 189                 goto err_irq_uninstall;
 190         }
 191
 192         drm_fbdev_generic_setup(ddev, 32);
 193
 194         dev_dbg(dev, "%s done\n", __func__);
 195
 196         return 0;
 197
 198 err_irq_uninstall:
 199         drm_irq_uninstall(ddev);
 200
 201 err_runtime_suspend:
 202 #ifndef CONFIG_PM
 203         dispc_runtime_suspend(tidss->dispc);
 204 #endif
 205         pm_runtime_disable(dev);
 206
 207         return ret;
 208 }
 209
 210 static int 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         drm_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_disable(dev);
 229
 230         /* devm allocated dispc goes away with the dev so mark it NULL */
 231         dispc_remove(tidss);
 232
 233         dev_dbg(dev, "%s done\n", __func__);
 234
 235         return 0;
 236 }
 237
 238 static void tidss_shutdown(struct platform_device *pdev)
 239 {
 240         drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
 241 }
 242
 243 static const struct of_device_id tidss_of_table[] = {
 244         { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, },
 245         { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, },
 246         { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, },
 247         { }
 248 };
 249
 250 MODULE_DEVICE_TABLE(of, tidss_of_table);
 251
 252 static struct platform_driver tidss_platform_driver = {
 253         .probe          = tidss_probe,
 254         .remove         = tidss_remove,
 255         .shutdown       = tidss_shutdown,
 256         .driver         = {
 257                 .name   = "tidss",
 258 #ifdef CONFIG_PM
 259                 .pm     = &tidss_pm_ops,
 260 #endif
 261                 .of_match_table = tidss_of_table,
 262                 .suppress_bind_attrs = true,
 263         },
 264 };
 265
 266 module_platform_driver(tidss_platform_driver);
 267
 268 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
 269 MODULE_DESCRIPTION("TI Keystone DSS Driver");
 270 MODULE_LICENSE("GPL v2");