| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/ |
| * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> |
| */ |
| |
| #include <linux/console.h> |
| #include <linux/of_device.h> |
| #include <linux/module.h> |
| #include <linux/pm_runtime.h> |
| |
| #include <drm/drm_atomic.h> |
| #include <drm/drm_atomic_helper.h> |
| #include <drm/drm_crtc.h> |
| #include <drm/drm_crtc_helper.h> |
| #include <drm/drm_drv.h> |
| #include <drm/drm_fb_helper.h> |
| #include <drm/drm_gem_cma_helper.h> |
| #include <drm/drm_managed.h> |
| #include <drm/drm_module.h> |
| #include <drm/drm_probe_helper.h> |
| |
| #include "tidss_dispc.h" |
| #include "tidss_drv.h" |
| #include "tidss_kms.h" |
| #include "tidss_irq.h" |
| |
| /* Power management */ |
| |
| int tidss_runtime_get(struct tidss_device *tidss) |
| { |
| int r; |
| |
| dev_dbg(tidss->dev, "%s\n", __func__); |
| |
| r = pm_runtime_get_sync(tidss->dev); |
| WARN_ON(r < 0); |
| return r < 0 ? r : 0; |
| } |
| |
| void tidss_runtime_put(struct tidss_device *tidss) |
| { |
| int r; |
| |
| dev_dbg(tidss->dev, "%s\n", __func__); |
| |
| r = pm_runtime_put_sync(tidss->dev); |
| WARN_ON(r < 0); |
| } |
| |
| static int __maybe_unused tidss_pm_runtime_suspend(struct device *dev) |
| { |
| struct tidss_device *tidss = dev_get_drvdata(dev); |
| |
| dev_dbg(dev, "%s\n", __func__); |
| |
| return dispc_runtime_suspend(tidss->dispc); |
| } |
| |
| static int __maybe_unused tidss_pm_runtime_resume(struct device *dev) |
| { |
| struct tidss_device *tidss = dev_get_drvdata(dev); |
| int r; |
| |
| dev_dbg(dev, "%s\n", __func__); |
| |
| r = dispc_runtime_resume(tidss->dispc); |
| if (r) |
| return r; |
| |
| return 0; |
| } |
| |
| static int __maybe_unused tidss_suspend(struct device *dev) |
| { |
| struct tidss_device *tidss = dev_get_drvdata(dev); |
| |
| dev_dbg(dev, "%s\n", __func__); |
| |
| return drm_mode_config_helper_suspend(&tidss->ddev); |
| } |
| |
| static int __maybe_unused tidss_resume(struct device *dev) |
| { |
| struct tidss_device *tidss = dev_get_drvdata(dev); |
| |
| dev_dbg(dev, "%s\n", __func__); |
| |
| return drm_mode_config_helper_resume(&tidss->ddev); |
| } |
| |
| static __maybe_unused const struct dev_pm_ops tidss_pm_ops = { |
| SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume) |
| SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL) |
| }; |
| |
| /* DRM device Information */ |
| |
| static void tidss_release(struct drm_device *ddev) |
| { |
| drm_kms_helper_poll_fini(ddev); |
| } |
| |
| DEFINE_DRM_GEM_CMA_FOPS(tidss_fops); |
| |
| static const struct drm_driver tidss_driver = { |
| .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, |
| .fops = &tidss_fops, |
| .release = tidss_release, |
| DRM_GEM_CMA_DRIVER_OPS_VMAP, |
| .name = "tidss", |
| .desc = "TI Keystone DSS", |
| .date = "20180215", |
| .major = 1, |
| .minor = 0, |
| }; |
| |
| static int tidss_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct tidss_device *tidss; |
| struct drm_device *ddev; |
| int ret; |
| int irq; |
| |
| dev_dbg(dev, "%s\n", __func__); |
| |
| tidss = devm_drm_dev_alloc(&pdev->dev, &tidss_driver, |
| struct tidss_device, ddev); |
| if (IS_ERR(tidss)) |
| return PTR_ERR(tidss); |
| |
| ddev = &tidss->ddev; |
| |
| tidss->dev = dev; |
| tidss->feat = of_device_get_match_data(dev); |
| |
| platform_set_drvdata(pdev, tidss); |
| |
| ret = dispc_init(tidss); |
| if (ret) { |
| dev_err(dev, "failed to initialize dispc: %d\n", ret); |
| return ret; |
| } |
| |
| pm_runtime_enable(dev); |
| |
| #ifndef CONFIG_PM |
| /* If we don't have PM, we need to call resume manually */ |
| dispc_runtime_resume(tidss->dispc); |
| #endif |
| |
| ret = tidss_modeset_init(tidss); |
| if (ret < 0) { |
| if (ret != -EPROBE_DEFER) |
| dev_err(dev, "failed to init DRM/KMS (%d)\n", ret); |
| goto err_runtime_suspend; |
| } |
| |
| irq = platform_get_irq(pdev, 0); |
| if (irq < 0) { |
| ret = irq; |
| goto err_runtime_suspend; |
| } |
| tidss->irq = irq; |
| |
| ret = tidss_irq_install(ddev, irq); |
| if (ret) { |
| dev_err(dev, "tidss_irq_install failed: %d\n", ret); |
| goto err_runtime_suspend; |
| } |
| |
| drm_kms_helper_poll_init(ddev); |
| |
| drm_mode_config_reset(ddev); |
| |
| ret = drm_dev_register(ddev, 0); |
| if (ret) { |
| dev_err(dev, "failed to register DRM device\n"); |
| goto err_irq_uninstall; |
| } |
| |
| drm_fbdev_generic_setup(ddev, 32); |
| |
| dev_dbg(dev, "%s done\n", __func__); |
| |
| return 0; |
| |
| err_irq_uninstall: |
| tidss_irq_uninstall(ddev); |
| |
| err_runtime_suspend: |
| #ifndef CONFIG_PM |
| dispc_runtime_suspend(tidss->dispc); |
| #endif |
| pm_runtime_disable(dev); |
| |
| return ret; |
| } |
| |
| static int tidss_remove(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct tidss_device *tidss = platform_get_drvdata(pdev); |
| struct drm_device *ddev = &tidss->ddev; |
| |
| dev_dbg(dev, "%s\n", __func__); |
| |
| drm_dev_unregister(ddev); |
| |
| drm_atomic_helper_shutdown(ddev); |
| |
| tidss_irq_uninstall(ddev); |
| |
| #ifndef CONFIG_PM |
| /* If we don't have PM, we need to call suspend manually */ |
| dispc_runtime_suspend(tidss->dispc); |
| #endif |
| pm_runtime_disable(dev); |
| |
| /* devm allocated dispc goes away with the dev so mark it NULL */ |
| dispc_remove(tidss); |
| |
| dev_dbg(dev, "%s done\n", __func__); |
| |
| return 0; |
| } |
| |
| static void tidss_shutdown(struct platform_device *pdev) |
| { |
| drm_atomic_helper_shutdown(platform_get_drvdata(pdev)); |
| } |
| |
| static const struct of_device_id tidss_of_table[] = { |
| { .compatible = "ti,k2g-dss", .data = &dispc_k2g_feats, }, |
| { .compatible = "ti,am65x-dss", .data = &dispc_am65x_feats, }, |
| { .compatible = "ti,j721e-dss", .data = &dispc_j721e_feats, }, |
| { } |
| }; |
| |
| MODULE_DEVICE_TABLE(of, tidss_of_table); |
| |
| static struct platform_driver tidss_platform_driver = { |
| .probe = tidss_probe, |
| .remove = tidss_remove, |
| .shutdown = tidss_shutdown, |
| .driver = { |
| .name = "tidss", |
| .pm = pm_ptr(&tidss_pm_ops), |
| .of_match_table = tidss_of_table, |
| .suppress_bind_attrs = true, |
| }, |
| }; |
| |
| drm_module_platform_driver(tidss_platform_driver); |
| |
| MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); |
| MODULE_DESCRIPTION("TI Keystone DSS Driver"); |
| MODULE_LICENSE("GPL v2"); |