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/clients/drm_client_setup.h> 13 #include <drm/drm_atomic.h> 14 #include <drm/drm_atomic_helper.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 #include "tidss_oldi.h" 28 29 /* Power management */ 30 31 int tidss_runtime_get(struct tidss_device *tidss) 32 { 33 int r; 34 35 dev_dbg(tidss->dev, "%s\n", __func__); 36 37 r = pm_runtime_resume_and_get(tidss->dev); 38 WARN_ON(r < 0); 39 return r; 40 } 41 42 void tidss_runtime_put(struct tidss_device *tidss) 43 { 44 int r; 45 46 dev_dbg(tidss->dev, "%s\n", __func__); 47 48 pm_runtime_mark_last_busy(tidss->dev); 49 50 r = pm_runtime_put_autosuspend(tidss->dev); 51 WARN_ON(r < 0); 52 } 53 54 static int __maybe_unused tidss_pm_runtime_suspend(struct device *dev) 55 { 56 struct tidss_device *tidss = dev_get_drvdata(dev); 57 58 dev_dbg(dev, "%s\n", __func__); 59 60 return dispc_runtime_suspend(tidss->dispc); 61 } 62 63 static int __maybe_unused tidss_pm_runtime_resume(struct device *dev) 64 { 65 struct tidss_device *tidss = dev_get_drvdata(dev); 66 int r; 67 68 dev_dbg(dev, "%s\n", __func__); 69 70 r = dispc_runtime_resume(tidss->dispc); 71 if (r) 72 return r; 73 74 return 0; 75 } 76 77 static int __maybe_unused tidss_suspend(struct device *dev) 78 { 79 struct tidss_device *tidss = dev_get_drvdata(dev); 80 81 dev_dbg(dev, "%s\n", __func__); 82 83 return drm_mode_config_helper_suspend(&tidss->ddev); 84 } 85 86 static int __maybe_unused tidss_resume(struct device *dev) 87 { 88 struct tidss_device *tidss = dev_get_drvdata(dev); 89 90 dev_dbg(dev, "%s\n", __func__); 91 92 return drm_mode_config_helper_resume(&tidss->ddev); 93 } 94 95 static __maybe_unused const struct dev_pm_ops tidss_pm_ops = { 96 SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume) 97 SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL) 98 }; 99 100 /* DRM device Information */ 101 102 static void tidss_release(struct drm_device *ddev) 103 { 104 drm_kms_helper_poll_fini(ddev); 105 } 106 107 DEFINE_DRM_GEM_DMA_FOPS(tidss_fops); 108 109 static const struct drm_driver tidss_driver = { 110 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 111 .fops = &tidss_fops, 112 .release = tidss_release, 113 DRM_GEM_DMA_DRIVER_OPS_VMAP, 114 DRM_FBDEV_DMA_DRIVER_OPS, 115 .name = "tidss", 116 .desc = "TI Keystone DSS", 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->irq_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 ret = tidss_oldi_init(tidss); 152 if (ret) 153 return dev_err_probe(dev, ret, "failed to init OLDI\n"); 154 155 pm_runtime_enable(dev); 156 157 pm_runtime_set_autosuspend_delay(dev, 1000); 158 pm_runtime_use_autosuspend(dev); 159 160 #ifndef CONFIG_PM 161 /* If we don't have PM, we need to call resume manually */ 162 dispc_runtime_resume(tidss->dispc); 163 #endif 164 165 ret = tidss_modeset_init(tidss); 166 if (ret < 0) { 167 if (ret != -EPROBE_DEFER) 168 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret); 169 goto err_runtime_suspend; 170 } 171 172 irq = platform_get_irq(pdev, 0); 173 if (irq < 0) { 174 ret = irq; 175 goto err_runtime_suspend; 176 } 177 tidss->irq = irq; 178 179 ret = tidss_irq_install(ddev, irq); 180 if (ret) { 181 dev_err(dev, "tidss_irq_install failed: %d\n", ret); 182 goto err_runtime_suspend; 183 } 184 185 drm_kms_helper_poll_init(ddev); 186 187 drm_mode_config_reset(ddev); 188 189 ret = drm_dev_register(ddev, 0); 190 if (ret) { 191 dev_err(dev, "failed to register DRM device\n"); 192 goto err_irq_uninstall; 193 } 194 195 drm_client_setup(ddev, NULL); 196 197 dev_dbg(dev, "%s done\n", __func__); 198 199 return 0; 200 201 err_irq_uninstall: 202 tidss_irq_uninstall(ddev); 203 204 err_runtime_suspend: 205 #ifndef CONFIG_PM 206 dispc_runtime_suspend(tidss->dispc); 207 #endif 208 pm_runtime_dont_use_autosuspend(dev); 209 pm_runtime_disable(dev); 210 211 tidss_oldi_deinit(tidss); 212 213 return ret; 214 } 215 216 static void tidss_remove(struct platform_device *pdev) 217 { 218 struct device *dev = &pdev->dev; 219 struct tidss_device *tidss = platform_get_drvdata(pdev); 220 struct drm_device *ddev = &tidss->ddev; 221 222 dev_dbg(dev, "%s\n", __func__); 223 224 drm_dev_unregister(ddev); 225 226 drm_atomic_helper_shutdown(ddev); 227 228 tidss_irq_uninstall(ddev); 229 230 #ifndef CONFIG_PM 231 /* If we don't have PM, we need to call suspend manually */ 232 dispc_runtime_suspend(tidss->dispc); 233 #endif 234 pm_runtime_dont_use_autosuspend(dev); 235 pm_runtime_disable(dev); 236 237 tidss_oldi_deinit(tidss); 238 239 /* devm allocated dispc goes away with the dev so mark it NULL */ 240 dispc_remove(tidss); 241 242 dev_dbg(dev, "%s done\n", __func__); 243 } 244 245 static void tidss_shutdown(struct platform_device *pdev) 246 { 247 drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); 248 } 249 250 static const struct of_device_id tidss_of_table[] = { 251 { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, }, 252 { .compatible = "ti,am625-dss", .data = &dispc_am625_feats, }, 253 { .compatible = "ti,am62a7-dss", .data = &dispc_am62a7_feats, }, 254 { .compatible = "ti,am62l-dss", .data = &dispc_am62l_feats, }, 255 { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, }, 256 { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, }, 257 { } 258 }; 259 260 MODULE_DEVICE_TABLE(of, tidss_of_table); 261 262 static struct platform_driver tidss_platform_driver = { 263 .probe = tidss_probe, 264 .remove = tidss_remove, 265 .shutdown = tidss_shutdown, 266 .driver = { 267 .name = "tidss", 268 .pm = pm_ptr(&tidss_pm_ops), 269 .of_match_table = tidss_of_table, 270 .suppress_bind_attrs = true, 271 }, 272 }; 273 274 drm_module_platform_driver(tidss_platform_driver); 275 276 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); 277 MODULE_DESCRIPTION("TI Keystone DSS Driver"); 278 MODULE_LICENSE("GPL v2"); 279