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 #include <linux/aperture.h> 12 13 #include <drm/clients/drm_client_setup.h> 14 #include <drm/drm_atomic.h> 15 #include <drm/drm_atomic_helper.h> 16 #include <drm/drm_crtc.h> 17 #include <drm/drm_drv.h> 18 #include <drm/drm_fbdev_dma.h> 19 #include <drm/drm_gem_dma_helper.h> 20 #include <drm/drm_managed.h> 21 #include <drm/drm_module.h> 22 #include <drm/drm_probe_helper.h> 23 24 #include "tidss_dispc.h" 25 #include "tidss_drv.h" 26 #include "tidss_kms.h" 27 #include "tidss_irq.h" 28 #include "tidss_oldi.h" 29 30 /* Power management */ 31 32 int tidss_runtime_get(struct tidss_device *tidss) 33 { 34 int r; 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 pm_runtime_mark_last_busy(tidss->dev); 46 47 r = pm_runtime_put_autosuspend(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 return dispc_runtime_suspend(tidss->dispc); 56 } 57 58 static int __maybe_unused tidss_pm_runtime_resume(struct device *dev) 59 { 60 struct tidss_device *tidss = dev_get_drvdata(dev); 61 int r; 62 63 r = dispc_runtime_resume(tidss->dispc); 64 if (r) 65 return r; 66 67 return 0; 68 } 69 70 static int __maybe_unused tidss_suspend(struct device *dev) 71 { 72 struct tidss_device *tidss = dev_get_drvdata(dev); 73 74 return drm_mode_config_helper_suspend(&tidss->ddev); 75 } 76 77 static int __maybe_unused tidss_resume(struct device *dev) 78 { 79 struct tidss_device *tidss = dev_get_drvdata(dev); 80 81 return drm_mode_config_helper_resume(&tidss->ddev); 82 } 83 84 static __maybe_unused const struct dev_pm_ops tidss_pm_ops = { 85 SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume) 86 SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL) 87 }; 88 89 /* DRM device Information */ 90 91 static void tidss_release(struct drm_device *ddev) 92 { 93 drm_kms_helper_poll_fini(ddev); 94 } 95 96 DEFINE_DRM_GEM_DMA_FOPS(tidss_fops); 97 98 static const struct drm_driver tidss_driver = { 99 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 100 .fops = &tidss_fops, 101 .release = tidss_release, 102 DRM_GEM_DMA_DRIVER_OPS_VMAP, 103 DRM_FBDEV_DMA_DRIVER_OPS, 104 .name = "tidss", 105 .desc = "TI Keystone DSS", 106 .major = 1, 107 .minor = 0, 108 }; 109 110 static int tidss_probe(struct platform_device *pdev) 111 { 112 struct device *dev = &pdev->dev; 113 struct tidss_device *tidss; 114 struct drm_device *ddev; 115 int ret; 116 int irq; 117 118 tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver, 119 struct tidss_device, ddev); 120 if (IS_ERR(tidss)) 121 return PTR_ERR(tidss); 122 123 ddev = &tidss->ddev; 124 125 tidss->dev = dev; 126 tidss->feat = of_device_get_match_data(dev); 127 128 platform_set_drvdata(pdev, tidss); 129 130 spin_lock_init(&tidss->irq_lock); 131 132 ret = dispc_init(tidss); 133 if (ret) { 134 dev_err(dev, "failed to initialize dispc: %d\n", ret); 135 return ret; 136 } 137 138 ret = tidss_oldi_init(tidss); 139 if (ret) 140 return dev_err_probe(dev, ret, "failed to init OLDI\n"); 141 142 pm_runtime_enable(dev); 143 144 pm_runtime_set_autosuspend_delay(dev, 1000); 145 pm_runtime_use_autosuspend(dev); 146 147 #ifndef CONFIG_PM 148 /* If we don't have PM, we need to call resume manually */ 149 dispc_runtime_resume(tidss->dispc); 150 #endif 151 152 ret = tidss_modeset_init(tidss); 153 if (ret < 0) { 154 if (ret != -EPROBE_DEFER) 155 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret); 156 goto err_runtime_suspend; 157 } 158 159 irq = platform_get_irq(pdev, 0); 160 if (irq < 0) { 161 ret = irq; 162 goto err_runtime_suspend; 163 } 164 tidss->irq = irq; 165 166 ret = tidss_irq_install(ddev, irq); 167 if (ret) { 168 dev_err(dev, "tidss_irq_install failed: %d\n", ret); 169 goto err_runtime_suspend; 170 } 171 172 drm_kms_helper_poll_init(ddev); 173 174 drm_mode_config_reset(ddev); 175 176 ret = drm_dev_register(ddev, 0); 177 if (ret) { 178 dev_err(dev, "failed to register DRM device\n"); 179 goto err_irq_uninstall; 180 } 181 182 /* Remove possible early fb before setting up the fbdev */ 183 ret = aperture_remove_all_conflicting_devices(tidss_driver.name); 184 if (ret) 185 goto err_drm_dev_unreg; 186 187 drm_client_setup(ddev, NULL); 188 189 dev_dbg(dev, "%s done\n", __func__); 190 191 return 0; 192 193 err_drm_dev_unreg: 194 drm_dev_unregister(ddev); 195 196 err_irq_uninstall: 197 tidss_irq_uninstall(ddev); 198 199 err_runtime_suspend: 200 #ifndef CONFIG_PM 201 dispc_runtime_suspend(tidss->dispc); 202 #endif 203 pm_runtime_dont_use_autosuspend(dev); 204 pm_runtime_disable(dev); 205 206 tidss_oldi_deinit(tidss); 207 208 return ret; 209 } 210 211 static void tidss_remove(struct platform_device *pdev) 212 { 213 struct device *dev = &pdev->dev; 214 struct tidss_device *tidss = platform_get_drvdata(pdev); 215 struct drm_device *ddev = &tidss->ddev; 216 217 drm_dev_unregister(ddev); 218 219 drm_atomic_helper_shutdown(ddev); 220 221 tidss_irq_uninstall(ddev); 222 223 #ifndef CONFIG_PM 224 /* If we don't have PM, we need to call suspend manually */ 225 dispc_runtime_suspend(tidss->dispc); 226 #endif 227 pm_runtime_dont_use_autosuspend(dev); 228 pm_runtime_disable(dev); 229 230 tidss_oldi_deinit(tidss); 231 232 /* devm allocated dispc goes away with the dev so mark it NULL */ 233 dispc_remove(tidss); 234 235 dev_dbg(dev, "%s done\n", __func__); 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,am625-dss", .data = &dispc_am625_feats, }, 246 { .compatible = "ti,am62a7-dss", .data = &dispc_am62a7_feats, }, 247 { .compatible = "ti,am62l-dss", .data = &dispc_am62l_feats, }, 248 { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, }, 249 { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, }, 250 { } 251 }; 252 253 MODULE_DEVICE_TABLE(of, tidss_of_table); 254 255 static struct platform_driver tidss_platform_driver = { 256 .probe = tidss_probe, 257 .remove = tidss_remove, 258 .shutdown = tidss_shutdown, 259 .driver = { 260 .name = "tidss", 261 .pm = pm_ptr(&tidss_pm_ops), 262 .of_match_table = tidss_of_table, 263 .suppress_bind_attrs = true, 264 }, 265 }; 266 267 drm_module_platform_driver(tidss_platform_driver); 268 269 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); 270 MODULE_DESCRIPTION("TI Keystone DSS Driver"); 271 MODULE_LICENSE("GPL v2"); 272