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/drm_atomic.h> 13 #include <drm/drm_atomic_helper.h> 14 #include <drm/drm_client_setup.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 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_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 dev_dbg(tidss->dev, "%s\n", __func__); 46 47 pm_runtime_mark_last_busy(tidss->dev); 48 49 r = pm_runtime_put_autosuspend(tidss->dev); 50 WARN_ON(r < 0); 51 } 52 53 static int __maybe_unused tidss_pm_runtime_suspend(struct device *dev) 54 { 55 struct tidss_device *tidss = dev_get_drvdata(dev); 56 57 dev_dbg(dev, "%s\n", __func__); 58 59 return dispc_runtime_suspend(tidss->dispc); 60 } 61 62 static int __maybe_unused tidss_pm_runtime_resume(struct device *dev) 63 { 64 struct tidss_device *tidss = dev_get_drvdata(dev); 65 int r; 66 67 dev_dbg(dev, "%s\n", __func__); 68 69 r = dispc_runtime_resume(tidss->dispc); 70 if (r) 71 return r; 72 73 return 0; 74 } 75 76 static int __maybe_unused tidss_suspend(struct device *dev) 77 { 78 struct tidss_device *tidss = dev_get_drvdata(dev); 79 80 dev_dbg(dev, "%s\n", __func__); 81 82 return drm_mode_config_helper_suspend(&tidss->ddev); 83 } 84 85 static int __maybe_unused tidss_resume(struct device *dev) 86 { 87 struct tidss_device *tidss = dev_get_drvdata(dev); 88 89 dev_dbg(dev, "%s\n", __func__); 90 91 return drm_mode_config_helper_resume(&tidss->ddev); 92 } 93 94 static __maybe_unused const struct dev_pm_ops tidss_pm_ops = { 95 SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume) 96 SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL) 97 }; 98 99 /* DRM device Information */ 100 101 static void tidss_release(struct drm_device *ddev) 102 { 103 drm_kms_helper_poll_fini(ddev); 104 } 105 106 DEFINE_DRM_GEM_DMA_FOPS(tidss_fops); 107 108 static const struct drm_driver tidss_driver = { 109 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 110 .fops = &tidss_fops, 111 .release = tidss_release, 112 DRM_GEM_DMA_DRIVER_OPS_VMAP, 113 DRM_FBDEV_DMA_DRIVER_OPS, 114 .name = "tidss", 115 .desc = "TI Keystone DSS", 116 .date = "20180215", 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->wait_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 pm_runtime_enable(dev); 152 153 pm_runtime_set_autosuspend_delay(dev, 1000); 154 pm_runtime_use_autosuspend(dev); 155 156 #ifndef CONFIG_PM 157 /* If we don't have PM, we need to call resume manually */ 158 dispc_runtime_resume(tidss->dispc); 159 #endif 160 161 ret = tidss_modeset_init(tidss); 162 if (ret < 0) { 163 if (ret != -EPROBE_DEFER) 164 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret); 165 goto err_runtime_suspend; 166 } 167 168 irq = platform_get_irq(pdev, 0); 169 if (irq < 0) { 170 ret = irq; 171 goto err_runtime_suspend; 172 } 173 tidss->irq = irq; 174 175 ret = tidss_irq_install(ddev, irq); 176 if (ret) { 177 dev_err(dev, "tidss_irq_install failed: %d\n", ret); 178 goto err_runtime_suspend; 179 } 180 181 drm_kms_helper_poll_init(ddev); 182 183 drm_mode_config_reset(ddev); 184 185 ret = drm_dev_register(ddev, 0); 186 if (ret) { 187 dev_err(dev, "failed to register DRM device\n"); 188 goto err_irq_uninstall; 189 } 190 191 drm_client_setup(ddev, NULL); 192 193 dev_dbg(dev, "%s done\n", __func__); 194 195 return 0; 196 197 err_irq_uninstall: 198 tidss_irq_uninstall(ddev); 199 200 err_runtime_suspend: 201 #ifndef CONFIG_PM 202 dispc_runtime_suspend(tidss->dispc); 203 #endif 204 pm_runtime_dont_use_autosuspend(dev); 205 pm_runtime_disable(dev); 206 207 return ret; 208 } 209 210 static void 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 tidss_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_dont_use_autosuspend(dev); 229 pm_runtime_disable(dev); 230 231 /* devm allocated dispc goes away with the dev so mark it NULL */ 232 dispc_remove(tidss); 233 234 dev_dbg(dev, "%s done\n", __func__); 235 } 236 237 static void tidss_shutdown(struct platform_device *pdev) 238 { 239 drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); 240 } 241 242 static const struct of_device_id tidss_of_table[] = { 243 { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, }, 244 { .compatible = "ti,am625-dss", .data = &dispc_am625_feats, }, 245 { .compatible = "ti,am62a7-dss", .data = &dispc_am62a7_feats, }, 246 { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, }, 247 { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, }, 248 { } 249 }; 250 251 MODULE_DEVICE_TABLE(of, tidss_of_table); 252 253 static struct platform_driver tidss_platform_driver = { 254 .probe = tidss_probe, 255 .remove_new = tidss_remove, 256 .shutdown = tidss_shutdown, 257 .driver = { 258 .name = "tidss", 259 .pm = pm_ptr(&tidss_pm_ops), 260 .of_match_table = tidss_of_table, 261 .suppress_bind_attrs = true, 262 }, 263 }; 264 265 drm_module_platform_driver(tidss_platform_driver); 266 267 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); 268 MODULE_DESCRIPTION("TI Keystone DSS Driver"); 269 MODULE_LICENSE("GPL v2"); 270