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1// SPDX-License-Identifier: GPL-2.02/*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/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 29int 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_resume_and_get(tidss->dev);36 WARN_ON(r < 0);37 return r;38}39 40void tidss_runtime_put(struct tidss_device *tidss)41{42 int r;43 44 dev_dbg(tidss->dev, "%s\n", __func__);45 46 pm_runtime_mark_last_busy(tidss->dev);47 48 r = pm_runtime_put_autosuspend(tidss->dev);49 WARN_ON(r < 0);50}51 52static int __maybe_unused tidss_pm_runtime_suspend(struct device *dev)53{54 struct tidss_device *tidss = dev_get_drvdata(dev);55 56 dev_dbg(dev, "%s\n", __func__);57 58 return dispc_runtime_suspend(tidss->dispc);59}60 61static int __maybe_unused tidss_pm_runtime_resume(struct device *dev)62{63 struct tidss_device *tidss = dev_get_drvdata(dev);64 int r;65 66 dev_dbg(dev, "%s\n", __func__);67 68 r = dispc_runtime_resume(tidss->dispc);69 if (r)70 return r;71 72 return 0;73}74 75static int __maybe_unused tidss_suspend(struct device *dev)76{77 struct tidss_device *tidss = dev_get_drvdata(dev);78 79 dev_dbg(dev, "%s\n", __func__);80 81 return drm_mode_config_helper_suspend(&tidss->ddev);82}83 84static int __maybe_unused tidss_resume(struct device *dev)85{86 struct tidss_device *tidss = dev_get_drvdata(dev);87 88 dev_dbg(dev, "%s\n", __func__);89 90 return drm_mode_config_helper_resume(&tidss->ddev);91}92 93static __maybe_unused const struct dev_pm_ops tidss_pm_ops = {94 SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume)95 SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL)96};97 98/* DRM device Information */99 100static void tidss_release(struct drm_device *ddev)101{102 drm_kms_helper_poll_fini(ddev);103}104 105DEFINE_DRM_GEM_DMA_FOPS(tidss_fops);106 107static const struct drm_driver tidss_driver = {108 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,109 .fops = &tidss_fops,110 .release = tidss_release,111 DRM_GEM_DMA_DRIVER_OPS_VMAP,112 .name = "tidss",113 .desc = "TI Keystone DSS",114 .date = "20180215",115 .major = 1,116 .minor = 0,117};118 119static int tidss_probe(struct platform_device *pdev)120{121 struct device *dev = &pdev->dev;122 struct tidss_device *tidss;123 struct drm_device *ddev;124 int ret;125 int irq;126 127 dev_dbg(dev, "%s\n", __func__);128 129 tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver,130 struct tidss_device, ddev);131 if (IS_ERR(tidss))132 return PTR_ERR(tidss);133 134 ddev = &tidss->ddev;135 136 tidss->dev = dev;137 tidss->feat = of_device_get_match_data(dev);138 139 platform_set_drvdata(pdev, tidss);140 141 spin_lock_init(&tidss->wait_lock);142 143 ret = dispc_init(tidss);144 if (ret) {145 dev_err(dev, "failed to initialize dispc: %d\n", ret);146 return ret;147 }148 149 pm_runtime_enable(dev);150 151 pm_runtime_set_autosuspend_delay(dev, 1000);152 pm_runtime_use_autosuspend(dev);153 154#ifndef CONFIG_PM155 /* If we don't have PM, we need to call resume manually */156 dispc_runtime_resume(tidss->dispc);157#endif158 159 ret = tidss_modeset_init(tidss);160 if (ret < 0) {161 if (ret != -EPROBE_DEFER)162 dev_err(dev, "failed to init DRM/KMS (%d)\n", ret);163 goto err_runtime_suspend;164 }165 166 irq = platform_get_irq(pdev, 0);167 if (irq < 0) {168 ret = irq;169 goto err_runtime_suspend;170 }171 tidss->irq = irq;172 173 ret = tidss_irq_install(ddev, irq);174 if (ret) {175 dev_err(dev, "tidss_irq_install failed: %d\n", ret);176 goto err_runtime_suspend;177 }178 179 drm_kms_helper_poll_init(ddev);180 181 drm_mode_config_reset(ddev);182 183 ret = drm_dev_register(ddev, 0);184 if (ret) {185 dev_err(dev, "failed to register DRM device\n");186 goto err_irq_uninstall;187 }188 189 drm_fbdev_dma_setup(ddev, 32);190 191 dev_dbg(dev, "%s done\n", __func__);192 193 return 0;194 195err_irq_uninstall:196 tidss_irq_uninstall(ddev);197 198err_runtime_suspend:199#ifndef CONFIG_PM200 dispc_runtime_suspend(tidss->dispc);201#endif202 pm_runtime_dont_use_autosuspend(dev);203 pm_runtime_disable(dev);204 205 return ret;206}207 208static void tidss_remove(struct platform_device *pdev)209{210 struct device *dev = &pdev->dev;211 struct tidss_device *tidss = platform_get_drvdata(pdev);212 struct drm_device *ddev = &tidss->ddev;213 214 dev_dbg(dev, "%s\n", __func__);215 216 drm_dev_unregister(ddev);217 218 drm_atomic_helper_shutdown(ddev);219 220 tidss_irq_uninstall(ddev);221 222#ifndef CONFIG_PM223 /* If we don't have PM, we need to call suspend manually */224 dispc_runtime_suspend(tidss->dispc);225#endif226 pm_runtime_dont_use_autosuspend(dev);227 pm_runtime_disable(dev);228 229 /* devm allocated dispc goes away with the dev so mark it NULL */230 dispc_remove(tidss);231 232 dev_dbg(dev, "%s done\n", __func__);233}234 235static void tidss_shutdown(struct platform_device *pdev)236{237 drm_atomic_helper_shutdown(platform_get_drvdata(pdev));238}239 240static const struct of_device_id tidss_of_table[] = {241 { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, },242 { .compatible = "ti,am625-dss", .data = &dispc_am625_feats, },243 { .compatible = "ti,am62a7-dss", .data = &dispc_am62a7_feats, },244 { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, },245 { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, },246 { }247};248 249MODULE_DEVICE_TABLE(of, tidss_of_table);250 251static struct platform_driver tidss_platform_driver = {252 .probe = tidss_probe,253 .remove_new = tidss_remove,254 .shutdown = tidss_shutdown,255 .driver = {256 .name = "tidss",257 .pm = pm_ptr(&tidss_pm_ops),258 .of_match_table = tidss_of_table,259 .suppress_bind_attrs = true,260 },261};262 263drm_module_platform_driver(tidss_platform_driver);264 265MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");266MODULE_DESCRIPTION("TI Keystone DSS Driver");267MODULE_LICENSE("GPL v2");268