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