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_crtc.h> 15 #include <drm/drm_drv.h> 16 #include <drm/drm_fbdev_dma.h> 17 #include <drm/drm_gem_dma_helper.h> 18 #include <drm/drm_managed.h> 19 #include <drm/drm_module.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_resume_and_get(tidss->dev); 36 WARN_ON(r < 0); 37 return r; 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 pm_runtime_mark_last_busy(tidss->dev); 47 48 r = pm_runtime_put_autosuspend(tidss->dev); 49 WARN_ON(r < 0); 50 } 51 52 static int __maybe_unused tidss_pm_runtime_suspend(struct device *dev) 53 { 54 struct tidss_device *tidss = dev_get_drvdata(dev); 55 56 dev_dbg(dev, "%s\n", __func__); 57 58 return dispc_runtime_suspend(tidss->dispc); 59 } 60 61 static int __maybe_unused tidss_pm_runtime_resume(struct device *dev) 62 { 63 struct tidss_device *tidss = dev_get_drvdata(dev); 64 int r; 65 66 dev_dbg(dev, "%s\n", __func__); 67 68 r = dispc_runtime_resume(tidss->dispc); 69 if (r) 70 return r; 71 72 return 0; 73 } 74 75 static int __maybe_unused tidss_suspend(struct device *dev) 76 { 77 struct tidss_device *tidss = dev_get_drvdata(dev); 78 79 dev_dbg(dev, "%s\n", __func__); 80 81 return drm_mode_config_helper_suspend(&tidss->ddev); 82 } 83 84 static int __maybe_unused tidss_resume(struct device *dev) 85 { 86 struct tidss_device *tidss = dev_get_drvdata(dev); 87 88 dev_dbg(dev, "%s\n", __func__); 89 90 return drm_mode_config_helper_resume(&tidss->ddev); 91 } 92 93 static __maybe_unused const struct dev_pm_ops tidss_pm_ops = { 94 SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume) 95 SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL) 96 }; 97 98 /* DRM device Information */ 99 100 static void tidss_release(struct drm_device *ddev) 101 { 102 drm_kms_helper_poll_fini(ddev); 103 } 104 105 DEFINE_DRM_GEM_DMA_FOPS(tidss_fops); 106 107 static const struct drm_driver tidss_driver = { 108 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 109 .fops = &tidss_fops, 110 .release = tidss_release, 111 DRM_GEM_DMA_DRIVER_OPS_VMAP, 112 .name = "tidss", 113 .desc = "TI Keystone DSS", 114 .date = "20180215", 115 .major = 1, 116 .minor = 0, 117 }; 118 119 static int tidss_probe(struct platform_device *pdev) 120 { 121 struct device *dev = &pdev->dev; 122 struct tidss_device *tidss; 123 struct drm_device *ddev; 124 int ret; 125 int irq; 126 127 dev_dbg(dev, "%s\n", __func__); 128 129 tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver, 130 struct tidss_device, ddev); 131 if (IS_ERR(tidss)) 132 return PTR_ERR(tidss); 133 134 ddev = &tidss->ddev; 135 136 tidss->dev = dev; 137 tidss->feat = of_device_get_match_data(dev); 138 139 platform_set_drvdata(pdev, tidss); 140 141 spin_lock_init(&tidss->wait_lock); 142 143 ret = dispc_init(tidss); 144 if (ret) { 145 dev_err(dev, "failed to initialize dispc: %d\n", ret); 146 return ret; 147 } 148 149 pm_runtime_enable(dev); 150 151 pm_runtime_set_autosuspend_delay(dev, 1000); 152 pm_runtime_use_autosuspend(dev); 153 154 #ifndef CONFIG_PM 155 /* If we don't have PM, we need to call resume manually */ 156 dispc_runtime_resume(tidss->dispc); 157 #endif 158 159 ret = tidss_modeset_init(tidss); 160 if (ret < 0) { 161 if (ret != -EPROBE_DEFER) 162 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret); 163 goto err_runtime_suspend; 164 } 165 166 irq = platform_get_irq(pdev, 0); 167 if (irq < 0) { 168 ret = irq; 169 goto err_runtime_suspend; 170 } 171 tidss->irq = irq; 172 173 ret = tidss_irq_install(ddev, irq); 174 if (ret) { 175 dev_err(dev, "tidss_irq_install failed: %d\n", ret); 176 goto err_runtime_suspend; 177 } 178 179 drm_kms_helper_poll_init(ddev); 180 181 drm_mode_config_reset(ddev); 182 183 ret = drm_dev_register(ddev, 0); 184 if (ret) { 185 dev_err(dev, "failed to register DRM device\n"); 186 goto err_irq_uninstall; 187 } 188 189 drm_fbdev_dma_setup(ddev, 32); 190 191 dev_dbg(dev, "%s done\n", __func__); 192 193 return 0; 194 195 err_irq_uninstall: 196 tidss_irq_uninstall(ddev); 197 198 err_runtime_suspend: 199 #ifndef CONFIG_PM 200 dispc_runtime_suspend(tidss->dispc); 201 #endif 202 pm_runtime_dont_use_autosuspend(dev); 203 pm_runtime_disable(dev); 204 205 return ret; 206 } 207 208 static void tidss_remove(struct platform_device *pdev) 209 { 210 struct device *dev = &pdev->dev; 211 struct tidss_device *tidss = platform_get_drvdata(pdev); 212 struct drm_device *ddev = &tidss->ddev; 213 214 dev_dbg(dev, "%s\n", __func__); 215 216 drm_dev_unregister(ddev); 217 218 drm_atomic_helper_shutdown(ddev); 219 220 tidss_irq_uninstall(ddev); 221 222 #ifndef CONFIG_PM 223 /* If we don't have PM, we need to call suspend manually */ 224 dispc_runtime_suspend(tidss->dispc); 225 #endif 226 pm_runtime_dont_use_autosuspend(dev); 227 pm_runtime_disable(dev); 228 229 /* devm allocated dispc goes away with the dev so mark it NULL */ 230 dispc_remove(tidss); 231 232 dev_dbg(dev, "%s done\n", __func__); 233 } 234 235 static void tidss_shutdown(struct platform_device *pdev) 236 { 237 drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); 238 } 239 240 static const struct of_device_id tidss_of_table[] = { 241 { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, }, 242 { .compatible = "ti,am625-dss", .data = &dispc_am625_feats, }, 243 { .compatible = "ti,am62a7-dss", .data = &dispc_am62a7_feats, }, 244 { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, }, 245 { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, }, 246 { } 247 }; 248 249 MODULE_DEVICE_TABLE(of, tidss_of_table); 250 251 static struct platform_driver tidss_platform_driver = { 252 .probe = tidss_probe, 253 .remove_new = tidss_remove, 254 .shutdown = tidss_shutdown, 255 .driver = { 256 .name = "tidss", 257 .pm = pm_ptr(&tidss_pm_ops), 258 .of_match_table = tidss_of_table, 259 .suppress_bind_attrs = true, 260 }, 261 }; 262 263 drm_module_platform_driver(tidss_platform_driver); 264 265 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); 266 MODULE_DESCRIPTION("TI Keystone DSS Driver"); 267 MODULE_LICENSE("GPL v2"); 268