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