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_irq.h> 20 #include <drm/drm_managed.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_get_sync(tidss->dev); 37 WARN_ON(r < 0); 38 return r < 0 ? r : 0; 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 r = pm_runtime_put_sync(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 dev_dbg(dev, "%s\n", __func__); 56 57 return dispc_runtime_suspend(tidss->dispc); 58 } 59 60 static int __maybe_unused tidss_pm_runtime_resume(struct device *dev) 61 { 62 struct tidss_device *tidss = dev_get_drvdata(dev); 63 int r; 64 65 dev_dbg(dev, "%s\n", __func__); 66 67 r = dispc_runtime_resume(tidss->dispc); 68 if (r) 69 return r; 70 71 return 0; 72 } 73 74 static int __maybe_unused tidss_suspend(struct device *dev) 75 { 76 struct tidss_device *tidss = dev_get_drvdata(dev); 77 78 dev_dbg(dev, "%s\n", __func__); 79 80 return drm_mode_config_helper_suspend(&tidss->ddev); 81 } 82 83 static int __maybe_unused tidss_resume(struct device *dev) 84 { 85 struct tidss_device *tidss = dev_get_drvdata(dev); 86 87 dev_dbg(dev, "%s\n", __func__); 88 89 return drm_mode_config_helper_resume(&tidss->ddev); 90 } 91 92 #ifdef CONFIG_PM 93 94 static const struct dev_pm_ops tidss_pm_ops = { 95 .runtime_suspend = tidss_pm_runtime_suspend, 96 .runtime_resume = tidss_pm_runtime_resume, 97 SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume) 98 }; 99 100 #endif /* CONFIG_PM */ 101 102 /* DRM device Information */ 103 104 static void tidss_release(struct drm_device *ddev) 105 { 106 drm_kms_helper_poll_fini(ddev); 107 } 108 109 DEFINE_DRM_GEM_CMA_FOPS(tidss_fops); 110 111 static const struct drm_driver tidss_driver = { 112 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 113 .fops = &tidss_fops, 114 .release = tidss_release, 115 DRM_GEM_CMA_DRIVER_OPS_VMAP, 116 .name = "tidss", 117 .desc = "TI Keystone DSS", 118 .date = "20180215", 119 .major = 1, 120 .minor = 0, 121 122 .irq_preinstall = tidss_irq_preinstall, 123 .irq_postinstall = tidss_irq_postinstall, 124 .irq_handler = tidss_irq_handler, 125 .irq_uninstall = tidss_irq_uninstall, 126 }; 127 128 static int tidss_probe(struct platform_device *pdev) 129 { 130 struct device *dev = &pdev->dev; 131 struct tidss_device *tidss; 132 struct drm_device *ddev; 133 int ret; 134 int irq; 135 136 dev_dbg(dev, "%s\n", __func__); 137 138 tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver, 139 struct tidss_device, ddev); 140 if (IS_ERR(tidss)) 141 return PTR_ERR(tidss); 142 143 ddev = &tidss->ddev; 144 145 tidss->dev = dev; 146 tidss->feat = of_device_get_match_data(dev); 147 148 platform_set_drvdata(pdev, tidss); 149 150 ret = dispc_init(tidss); 151 if (ret) { 152 dev_err(dev, "failed to initialize dispc: %d\n", ret); 153 return ret; 154 } 155 156 pm_runtime_enable(dev); 157 158 #ifndef CONFIG_PM 159 /* If we don't have PM, we need to call resume manually */ 160 dispc_runtime_resume(tidss->dispc); 161 #endif 162 163 ret = tidss_modeset_init(tidss); 164 if (ret < 0) { 165 if (ret != -EPROBE_DEFER) 166 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret); 167 goto err_runtime_suspend; 168 } 169 170 irq = platform_get_irq(pdev, 0); 171 if (irq < 0) { 172 ret = irq; 173 goto err_runtime_suspend; 174 } 175 176 ret = drm_irq_install(ddev, irq); 177 if (ret) { 178 dev_err(dev, "drm_irq_install failed: %d\n", ret); 179 goto err_runtime_suspend; 180 } 181 182 drm_kms_helper_poll_init(ddev); 183 184 drm_mode_config_reset(ddev); 185 186 ret = drm_dev_register(ddev, 0); 187 if (ret) { 188 dev_err(dev, "failed to register DRM device\n"); 189 goto err_irq_uninstall; 190 } 191 192 drm_fbdev_generic_setup(ddev, 32); 193 194 dev_dbg(dev, "%s done\n", __func__); 195 196 return 0; 197 198 err_irq_uninstall: 199 drm_irq_uninstall(ddev); 200 201 err_runtime_suspend: 202 #ifndef CONFIG_PM 203 dispc_runtime_suspend(tidss->dispc); 204 #endif 205 pm_runtime_disable(dev); 206 207 return ret; 208 } 209 210 static int 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 drm_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_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 return 0; 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,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 #ifdef CONFIG_PM 259 .pm = &tidss_pm_ops, 260 #endif 261 .of_match_table = tidss_of_table, 262 .suppress_bind_attrs = true, 263 }, 264 }; 265 266 module_platform_driver(tidss_platform_driver); 267 268 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); 269 MODULE_DESCRIPTION("TI Keystone DSS Driver"); 270 MODULE_LICENSE("GPL v2"); 271