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 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 .major = 1, 117 .minor = 0, 118 }; 119 120 static int tidss_probe(struct platform_device *pdev) 121 { 122 struct device *dev = &pdev->dev; 123 struct tidss_device *tidss; 124 struct drm_device *ddev; 125 int ret; 126 int irq; 127 128 dev_dbg(dev, "%s\n", __func__); 129 130 tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver, 131 struct tidss_device, ddev); 132 if (IS_ERR(tidss)) 133 return PTR_ERR(tidss); 134 135 ddev = &tidss->ddev; 136 137 tidss->dev = dev; 138 tidss->feat = of_device_get_match_data(dev); 139 140 platform_set_drvdata(pdev, tidss); 141 142 spin_lock_init(&tidss->irq_lock); 143 144 ret = dispc_init(tidss); 145 if (ret) { 146 dev_err(dev, "failed to initialize dispc: %d\n", ret); 147 return ret; 148 } 149 150 pm_runtime_enable(dev); 151 152 pm_runtime_set_autosuspend_delay(dev, 1000); 153 pm_runtime_use_autosuspend(dev); 154 155 #ifndef CONFIG_PM 156 /* If we don't have PM, we need to call resume manually */ 157 dispc_runtime_resume(tidss->dispc); 158 #endif 159 160 ret = tidss_modeset_init(tidss); 161 if (ret < 0) { 162 if (ret != -EPROBE_DEFER) 163 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret); 164 goto err_runtime_suspend; 165 } 166 167 irq = platform_get_irq(pdev, 0); 168 if (irq < 0) { 169 ret = irq; 170 goto err_runtime_suspend; 171 } 172 tidss->irq = irq; 173 174 ret = tidss_irq_install(ddev, irq); 175 if (ret) { 176 dev_err(dev, "tidss_irq_install failed: %d\n", ret); 177 goto err_runtime_suspend; 178 } 179 180 drm_kms_helper_poll_init(ddev); 181 182 drm_mode_config_reset(ddev); 183 184 ret = drm_dev_register(ddev, 0); 185 if (ret) { 186 dev_err(dev, "failed to register DRM device\n"); 187 goto err_irq_uninstall; 188 } 189 190 drm_client_setup(ddev, NULL); 191 192 dev_dbg(dev, "%s done\n", __func__); 193 194 return 0; 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 return ret; 207 } 208 209 static void tidss_remove(struct platform_device *pdev) 210 { 211 struct device *dev = &pdev->dev; 212 struct tidss_device *tidss = platform_get_drvdata(pdev); 213 struct drm_device *ddev = &tidss->ddev; 214 215 dev_dbg(dev, "%s\n", __func__); 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 /* devm allocated dispc goes away with the dev so mark it NULL */ 231 dispc_remove(tidss); 232 233 dev_dbg(dev, "%s done\n", __func__); 234 } 235 236 static void tidss_shutdown(struct platform_device *pdev) 237 { 238 drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); 239 } 240 241 static const struct of_device_id tidss_of_table[] = { 242 { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, }, 243 { .compatible = "ti,am625-dss", .data = &dispc_am625_feats, }, 244 { .compatible = "ti,am62a7-dss", .data = &dispc_am62a7_feats, }, 245 { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, }, 246 { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, }, 247 { } 248 }; 249 250 MODULE_DEVICE_TABLE(of, tidss_of_table); 251 252 static struct platform_driver tidss_platform_driver = { 253 .probe = tidss_probe, 254 .remove = tidss_remove, 255 .shutdown = tidss_shutdown, 256 .driver = { 257 .name = "tidss", 258 .pm = pm_ptr(&tidss_pm_ops), 259 .of_match_table = tidss_of_table, 260 .suppress_bind_attrs = true, 261 }, 262 }; 263 264 drm_module_platform_driver(tidss_platform_driver); 265 266 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); 267 MODULE_DESCRIPTION("TI Keystone DSS Driver"); 268 MODULE_LICENSE("GPL v2"); 269