diff options
Diffstat (limited to 'drivers/gpu/drm/tidss/tidss_drv.c')
| -rw-r--r-- | drivers/gpu/drm/tidss/tidss_drv.c | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tidss/tidss_drv.c b/drivers/gpu/drm/tidss/tidss_drv.c new file mode 100644 index 000000000000..d95e4be2c7b9 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_drv.c @@ -0,0 +1,285 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://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_irq.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); +} + +#ifdef CONFIG_PM + +static const struct dev_pm_ops tidss_pm_ops = { + .runtime_suspend = tidss_pm_runtime_suspend, + .runtime_resume = tidss_pm_runtime_resume, + SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume) +}; + +#endif /* CONFIG_PM */ + +/* DRM device Information */ + +static void tidss_release(struct drm_device *ddev) +{ + struct tidss_device *tidss = ddev->dev_private; + + drm_kms_helper_poll_fini(ddev); + + tidss_modeset_cleanup(tidss); + + drm_dev_fini(ddev); + + kfree(tidss); +} + +DEFINE_DRM_GEM_CMA_FOPS(tidss_fops); + +static struct drm_driver tidss_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &tidss_fops, + .release = tidss_release, + DRM_GEM_CMA_VMAP_DRIVER_OPS, + .name = "tidss", + .desc = "TI Keystone DSS", + .date = "20180215", + .major = 1, + .minor = 0, + + .irq_preinstall = tidss_irq_preinstall, + .irq_postinstall = tidss_irq_postinstall, + .irq_handler = tidss_irq_handler, + .irq_uninstall = tidss_irq_uninstall, +}; + +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__); + + /* Can't use devm_* since drm_device's lifetime may exceed dev's */ + tidss = kzalloc(sizeof(*tidss), GFP_KERNEL); + if (!tidss) + return -ENOMEM; + + ddev = &tidss->ddev; + + ret = devm_drm_dev_init(&pdev->dev, ddev, &tidss_driver); + if (ret) { + kfree(ddev); + return ret; + } + + tidss->dev = dev; + tidss->feat = of_device_get_match_data(dev); + + platform_set_drvdata(pdev, tidss); + + ddev->dev_private = 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; + } + + ret = drm_irq_install(ddev, irq); + if (ret) { + dev_err(dev, "drm_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: + drm_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); + + drm_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", +#ifdef CONFIG_PM + .pm = &tidss_pm_ops, +#endif + .of_match_table = tidss_of_table, + .suppress_bind_attrs = true, + }, +}; + +module_platform_driver(tidss_platform_driver); + +MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); +MODULE_DESCRIPTION("TI Keystone DSS Driver"); +MODULE_LICENSE("GPL v2"); |