1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2018 Texas Instruments Incorporated - http://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_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 #ifdef CONFIG_PM 92 93 static const struct dev_pm_ops tidss_pm_ops = { 94 .runtime_suspend = tidss_pm_runtime_suspend, 95 .runtime_resume = tidss_pm_runtime_resume, 96 SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume) 97 }; 98 99 #endif /* CONFIG_PM */ 100 101 /* DRM device Information */ 102 103 static void tidss_release(struct drm_device *ddev) 104 { 105 struct tidss_device *tidss = ddev->dev_private; 106 107 drm_kms_helper_poll_fini(ddev); 108 109 tidss_modeset_cleanup(tidss); 110 111 drm_dev_fini(ddev); 112 113 kfree(tidss); 114 } 115 116 DEFINE_DRM_GEM_CMA_FOPS(tidss_fops); 117 118 static struct drm_driver tidss_driver = { 119 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 120 .fops = &tidss_fops, 121 .release = tidss_release, 122 DRM_GEM_CMA_VMAP_DRIVER_OPS, 123 .name = "tidss", 124 .desc = "TI Keystone DSS", 125 .date = "20180215", 126 .major = 1, 127 .minor = 0, 128 129 .irq_preinstall = tidss_irq_preinstall, 130 .irq_postinstall = tidss_irq_postinstall, 131 .irq_handler = tidss_irq_handler, 132 .irq_uninstall = tidss_irq_uninstall, 133 }; 134 135 static int tidss_probe(struct platform_device *pdev) 136 { 137 struct device *dev = &pdev->dev; 138 struct tidss_device *tidss; 139 struct drm_device *ddev; 140 int ret; 141 int irq; 142 143 dev_dbg(dev, "%s\n", __func__); 144 145 /* Can't use devm_* since drm_device's lifetime may exceed dev's */ 146 tidss = kzalloc(sizeof(*tidss), GFP_KERNEL); 147 if (!tidss) 148 return -ENOMEM; 149 150 ddev = &tidss->ddev; 151 152 ret = devm_drm_dev_init(&pdev->dev, ddev, &tidss_driver); 153 if (ret) { 154 kfree(ddev); 155 return ret; 156 } 157 158 tidss->dev = dev; 159 tidss->feat = of_device_get_match_data(dev); 160 161 platform_set_drvdata(pdev, tidss); 162 163 ddev->dev_private = tidss; 164 165 ret = dispc_init(tidss); 166 if (ret) { 167 dev_err(dev, "failed to initialize dispc: %d\n", ret); 168 return ret; 169 } 170 171 pm_runtime_enable(dev); 172 173 #ifndef CONFIG_PM 174 /* If we don't have PM, we need to call resume manually */ 175 dispc_runtime_resume(tidss->dispc); 176 #endif 177 178 ret = tidss_modeset_init(tidss); 179 if (ret < 0) { 180 if (ret != -EPROBE_DEFER) 181 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret); 182 goto err_runtime_suspend; 183 } 184 185 irq = platform_get_irq(pdev, 0); 186 if (irq < 0) { 187 ret = irq; 188 goto err_runtime_suspend; 189 } 190 191 ret = drm_irq_install(ddev, irq); 192 if (ret) { 193 dev_err(dev, "drm_irq_install failed: %d\n", ret); 194 goto err_runtime_suspend; 195 } 196 197 drm_kms_helper_poll_init(ddev); 198 199 drm_mode_config_reset(ddev); 200 201 ret = drm_dev_register(ddev, 0); 202 if (ret) { 203 dev_err(dev, "failed to register DRM device\n"); 204 goto err_irq_uninstall; 205 } 206 207 drm_fbdev_generic_setup(ddev, 32); 208 209 dev_dbg(dev, "%s done\n", __func__); 210 211 return 0; 212 213 err_irq_uninstall: 214 drm_irq_uninstall(ddev); 215 216 err_runtime_suspend: 217 #ifndef CONFIG_PM 218 dispc_runtime_suspend(tidss->dispc); 219 #endif 220 pm_runtime_disable(dev); 221 222 return ret; 223 } 224 225 static int tidss_remove(struct platform_device *pdev) 226 { 227 struct device *dev = &pdev->dev; 228 struct tidss_device *tidss = platform_get_drvdata(pdev); 229 struct drm_device *ddev = &tidss->ddev; 230 231 dev_dbg(dev, "%s\n", __func__); 232 233 drm_dev_unregister(ddev); 234 235 drm_atomic_helper_shutdown(ddev); 236 237 drm_irq_uninstall(ddev); 238 239 #ifndef CONFIG_PM 240 /* If we don't have PM, we need to call suspend manually */ 241 dispc_runtime_suspend(tidss->dispc); 242 #endif 243 pm_runtime_disable(dev); 244 245 /* devm allocated dispc goes away with the dev so mark it NULL */ 246 dispc_remove(tidss); 247 248 dev_dbg(dev, "%s done\n", __func__); 249 250 return 0; 251 } 252 253 static void tidss_shutdown(struct platform_device *pdev) 254 { 255 drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); 256 } 257 258 static const struct of_device_id tidss_of_table[] = { 259 { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, }, 260 { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, }, 261 { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, }, 262 { } 263 }; 264 265 MODULE_DEVICE_TABLE(of, tidss_of_table); 266 267 static struct platform_driver tidss_platform_driver = { 268 .probe = tidss_probe, 269 .remove = tidss_remove, 270 .shutdown = tidss_shutdown, 271 .driver = { 272 .name = "tidss", 273 #ifdef CONFIG_PM 274 .pm = &tidss_pm_ops, 275 #endif 276 .of_match_table = tidss_of_table, 277 .suppress_bind_attrs = true, 278 }, 279 }; 280 281 module_platform_driver(tidss_platform_driver); 282 283 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); 284 MODULE_DESCRIPTION("TI Keystone DSS Driver"); 285 MODULE_LICENSE("GPL v2"); 286