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_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_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 static __maybe_unused const struct dev_pm_ops tidss_pm_ops = { 93 SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume) 94 SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL) 95 }; 96 97 /* DRM device Information */ 98 99 static void tidss_release(struct drm_device *ddev) 100 { 101 drm_kms_helper_poll_fini(ddev); 102 } 103 104 DEFINE_DRM_GEM_CMA_FOPS(tidss_fops); 105 106 static const struct drm_driver tidss_driver = { 107 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 108 .fops = &tidss_fops, 109 .release = tidss_release, 110 DRM_GEM_CMA_DRIVER_OPS_VMAP, 111 .name = "tidss", 112 .desc = "TI Keystone DSS", 113 .date = "20180215", 114 .major = 1, 115 .minor = 0, 116 }; 117 118 static int tidss_probe(struct platform_device *pdev) 119 { 120 struct device *dev = &pdev->dev; 121 struct tidss_device *tidss; 122 struct drm_device *ddev; 123 int ret; 124 int irq; 125 126 dev_dbg(dev, "%s\n", __func__); 127 128 tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver, 129 struct tidss_device, ddev); 130 if (IS_ERR(tidss)) 131 return PTR_ERR(tidss); 132 133 ddev = &tidss->ddev; 134 135 tidss->dev = dev; 136 tidss->feat = of_device_get_match_data(dev); 137 138 platform_set_drvdata(pdev, tidss); 139 140 ret = dispc_init(tidss); 141 if (ret) { 142 dev_err(dev, "failed to initialize dispc: %d\n", ret); 143 return ret; 144 } 145 146 pm_runtime_enable(dev); 147 148 #ifndef CONFIG_PM 149 /* If we don't have PM, we need to call resume manually */ 150 dispc_runtime_resume(tidss->dispc); 151 #endif 152 153 ret = tidss_modeset_init(tidss); 154 if (ret < 0) { 155 if (ret != -EPROBE_DEFER) 156 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret); 157 goto err_runtime_suspend; 158 } 159 160 irq = platform_get_irq(pdev, 0); 161 if (irq < 0) { 162 ret = irq; 163 goto err_runtime_suspend; 164 } 165 tidss->irq = irq; 166 167 ret = tidss_irq_install(ddev, irq); 168 if (ret) { 169 dev_err(dev, "tidss_irq_install failed: %d\n", ret); 170 goto err_runtime_suspend; 171 } 172 173 drm_kms_helper_poll_init(ddev); 174 175 drm_mode_config_reset(ddev); 176 177 ret = drm_dev_register(ddev, 0); 178 if (ret) { 179 dev_err(dev, "failed to register DRM device\n"); 180 goto err_irq_uninstall; 181 } 182 183 drm_fbdev_generic_setup(ddev, 32); 184 185 dev_dbg(dev, "%s done\n", __func__); 186 187 return 0; 188 189 err_irq_uninstall: 190 tidss_irq_uninstall(ddev); 191 192 err_runtime_suspend: 193 #ifndef CONFIG_PM 194 dispc_runtime_suspend(tidss->dispc); 195 #endif 196 pm_runtime_disable(dev); 197 198 return ret; 199 } 200 201 static int tidss_remove(struct platform_device *pdev) 202 { 203 struct device *dev = &pdev->dev; 204 struct tidss_device *tidss = platform_get_drvdata(pdev); 205 struct drm_device *ddev = &tidss->ddev; 206 207 dev_dbg(dev, "%s\n", __func__); 208 209 drm_dev_unregister(ddev); 210 211 drm_atomic_helper_shutdown(ddev); 212 213 tidss_irq_uninstall(ddev); 214 215 #ifndef CONFIG_PM 216 /* If we don't have PM, we need to call suspend manually */ 217 dispc_runtime_suspend(tidss->dispc); 218 #endif 219 pm_runtime_disable(dev); 220 221 /* devm allocated dispc goes away with the dev so mark it NULL */ 222 dispc_remove(tidss); 223 224 dev_dbg(dev, "%s done\n", __func__); 225 226 return 0; 227 } 228 229 static void tidss_shutdown(struct platform_device *pdev) 230 { 231 drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); 232 } 233 234 static const struct of_device_id tidss_of_table[] = { 235 { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, }, 236 { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, }, 237 { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, }, 238 { } 239 }; 240 241 MODULE_DEVICE_TABLE(of, tidss_of_table); 242 243 static struct platform_driver tidss_platform_driver = { 244 .probe = tidss_probe, 245 .remove = tidss_remove, 246 .shutdown = tidss_shutdown, 247 .driver = { 248 .name = "tidss", 249 .pm = pm_ptr(&tidss_pm_ops), 250 .of_match_table = tidss_of_table, 251 .suppress_bind_attrs = true, 252 }, 253 }; 254 255 drm_module_platform_driver(tidss_platform_driver); 256 257 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); 258 MODULE_DESCRIPTION("TI Keystone DSS Driver"); 259 MODULE_LICENSE("GPL v2"); 260