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_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_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 static __maybe_unused const struct dev_pm_ops tidss_pm_ops = { 92 SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume) 93 SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL) 94 }; 95 96 /* DRM device Information */ 97 98 static void tidss_release(struct drm_device *ddev) 99 { 100 drm_kms_helper_poll_fini(ddev); 101 } 102 103 DEFINE_DRM_GEM_DMA_FOPS(tidss_fops); 104 105 static const struct drm_driver tidss_driver = { 106 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 107 .fops = &tidss_fops, 108 .release = tidss_release, 109 DRM_GEM_DMA_DRIVER_OPS_VMAP, 110 .name = "tidss", 111 .desc = "TI Keystone DSS", 112 .date = "20180215", 113 .major = 1, 114 .minor = 0, 115 }; 116 117 static int tidss_probe(struct platform_device *pdev) 118 { 119 struct device *dev = &pdev->dev; 120 struct tidss_device *tidss; 121 struct drm_device *ddev; 122 int ret; 123 int irq; 124 125 dev_dbg(dev, "%s\n", __func__); 126 127 tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver, 128 struct tidss_device, ddev); 129 if (IS_ERR(tidss)) 130 return PTR_ERR(tidss); 131 132 ddev = &tidss->ddev; 133 134 tidss->dev = dev; 135 tidss->feat = of_device_get_match_data(dev); 136 137 platform_set_drvdata(pdev, tidss); 138 139 ret = dispc_init(tidss); 140 if (ret) { 141 dev_err(dev, "failed to initialize dispc: %d\n", ret); 142 return ret; 143 } 144 145 pm_runtime_enable(dev); 146 147 #ifndef CONFIG_PM 148 /* If we don't have PM, we need to call resume manually */ 149 dispc_runtime_resume(tidss->dispc); 150 #endif 151 152 ret = tidss_modeset_init(tidss); 153 if (ret < 0) { 154 if (ret != -EPROBE_DEFER) 155 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret); 156 goto err_runtime_suspend; 157 } 158 159 irq = platform_get_irq(pdev, 0); 160 if (irq < 0) { 161 ret = irq; 162 goto err_runtime_suspend; 163 } 164 tidss->irq = irq; 165 166 ret = tidss_irq_install(ddev, irq); 167 if (ret) { 168 dev_err(dev, "tidss_irq_install failed: %d\n", ret); 169 goto err_runtime_suspend; 170 } 171 172 drm_kms_helper_poll_init(ddev); 173 174 drm_mode_config_reset(ddev); 175 176 ret = drm_dev_register(ddev, 0); 177 if (ret) { 178 dev_err(dev, "failed to register DRM device\n"); 179 goto err_irq_uninstall; 180 } 181 182 drm_fbdev_dma_setup(ddev, 32); 183 184 dev_dbg(dev, "%s done\n", __func__); 185 186 return 0; 187 188 err_irq_uninstall: 189 tidss_irq_uninstall(ddev); 190 191 err_runtime_suspend: 192 #ifndef CONFIG_PM 193 dispc_runtime_suspend(tidss->dispc); 194 #endif 195 pm_runtime_disable(dev); 196 197 return ret; 198 } 199 200 static int tidss_remove(struct platform_device *pdev) 201 { 202 struct device *dev = &pdev->dev; 203 struct tidss_device *tidss = platform_get_drvdata(pdev); 204 struct drm_device *ddev = &tidss->ddev; 205 206 dev_dbg(dev, "%s\n", __func__); 207 208 drm_dev_unregister(ddev); 209 210 drm_atomic_helper_shutdown(ddev); 211 212 tidss_irq_uninstall(ddev); 213 214 #ifndef CONFIG_PM 215 /* If we don't have PM, we need to call suspend manually */ 216 dispc_runtime_suspend(tidss->dispc); 217 #endif 218 pm_runtime_disable(dev); 219 220 /* devm allocated dispc goes away with the dev so mark it NULL */ 221 dispc_remove(tidss); 222 223 dev_dbg(dev, "%s done\n", __func__); 224 225 return 0; 226 } 227 228 static void tidss_shutdown(struct platform_device *pdev) 229 { 230 drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); 231 } 232 233 static const struct of_device_id tidss_of_table[] = { 234 { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, }, 235 { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, }, 236 { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, }, 237 { } 238 }; 239 240 MODULE_DEVICE_TABLE(of, tidss_of_table); 241 242 static struct platform_driver tidss_platform_driver = { 243 .probe = tidss_probe, 244 .remove = tidss_remove, 245 .shutdown = tidss_shutdown, 246 .driver = { 247 .name = "tidss", 248 .pm = pm_ptr(&tidss_pm_ops), 249 .of_match_table = tidss_of_table, 250 .suppress_bind_attrs = true, 251 }, 252 }; 253 254 drm_module_platform_driver(tidss_platform_driver); 255 256 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); 257 MODULE_DESCRIPTION("TI Keystone DSS Driver"); 258 MODULE_LICENSE("GPL v2"); 259