diff options
Diffstat (limited to 'drivers/gpu/drm/zte/zx_drm_drv.c')
| -rw-r--r-- | drivers/gpu/drm/zte/zx_drm_drv.c | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/drivers/gpu/drm/zte/zx_drm_drv.c b/drivers/gpu/drm/zte/zx_drm_drv.c new file mode 100644 index 000000000000..3e76f72c92ff --- /dev/null +++ b/drivers/gpu/drm/zte/zx_drm_drv.c @@ -0,0 +1,267 @@ +/* + * Copyright 2016 Linaro Ltd. + * Copyright 2016 ZTE Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/of_graph.h> +#include <linux/of_platform.h> +#include <linux/spinlock.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_fb_cma_helper.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_gem_cma_helper.h> +#include <drm/drm_of.h> +#include <drm/drmP.h> + +#include "zx_drm_drv.h" +#include "zx_vou.h" + +struct zx_drm_private { + struct drm_fbdev_cma *fbdev; +}; + +static void zx_drm_fb_output_poll_changed(struct drm_device *drm) +{ + struct zx_drm_private *priv = drm->dev_private; + + drm_fbdev_cma_hotplug_event(priv->fbdev); +} + +static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = { + .fb_create = drm_fb_cma_create, + .output_poll_changed = zx_drm_fb_output_poll_changed, + .atomic_check = drm_atomic_helper_check, + .atomic_commit = drm_atomic_helper_commit, +}; + +static void zx_drm_lastclose(struct drm_device *drm) +{ + struct zx_drm_private *priv = drm->dev_private; + + drm_fbdev_cma_restore_mode(priv->fbdev); +} + +static const struct file_operations zx_drm_fops = { + .owner = THIS_MODULE, + .open = drm_open, + .release = drm_release, + .unlocked_ioctl = drm_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = drm_compat_ioctl, +#endif + .poll = drm_poll, + .read = drm_read, + .llseek = noop_llseek, + .mmap = drm_gem_cma_mmap, +}; + +static struct drm_driver zx_drm_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | + DRIVER_ATOMIC, + .lastclose = zx_drm_lastclose, + .get_vblank_counter = drm_vblank_no_hw_counter, + .enable_vblank = zx_vou_enable_vblank, + .disable_vblank = zx_vou_disable_vblank, + .gem_free_object = drm_gem_cma_free_object, + .gem_vm_ops = &drm_gem_cma_vm_ops, + .dumb_create = drm_gem_cma_dumb_create, + .dumb_map_offset = drm_gem_cma_dumb_map_offset, + .dumb_destroy = drm_gem_dumb_destroy, + .prime_handle_to_fd = drm_gem_prime_handle_to_fd, + .prime_fd_to_handle = drm_gem_prime_fd_to_handle, + .gem_prime_export = drm_gem_prime_export, + .gem_prime_import = drm_gem_prime_import, + .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, + .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, + .gem_prime_vmap = drm_gem_cma_prime_vmap, + .gem_prime_vunmap = drm_gem_cma_prime_vunmap, + .gem_prime_mmap = drm_gem_cma_prime_mmap, + .fops = &zx_drm_fops, + .name = "zx-vou", + .desc = "ZTE VOU Controller DRM", + .date = "20160811", + .major = 1, + .minor = 0, +}; + +static int zx_drm_bind(struct device *dev) +{ + struct drm_device *drm; + struct zx_drm_private *priv; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + drm = drm_dev_alloc(&zx_drm_driver, dev); + if (IS_ERR(drm)) + return PTR_ERR(drm); + + drm->dev_private = priv; + dev_set_drvdata(dev, drm); + + drm_mode_config_init(drm); + drm->mode_config.min_width = 16; + drm->mode_config.min_height = 16; + drm->mode_config.max_width = 4096; + drm->mode_config.max_height = 4096; + drm->mode_config.funcs = &zx_drm_mode_config_funcs; + + ret = component_bind_all(dev, drm); + if (ret) { + DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret); + goto out_unregister; + } + + ret = drm_vblank_init(drm, drm->mode_config.num_crtc); + if (ret < 0) { + DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret); + goto out_unbind; + } + + /* + * We will manage irq handler on our own. In this case, irq_enabled + * need to be true for using vblank core support. + */ + drm->irq_enabled = true; + + drm_mode_config_reset(drm); + drm_kms_helper_poll_init(drm); + + priv->fbdev = drm_fbdev_cma_init(drm, 32, drm->mode_config.num_crtc, + drm->mode_config.num_connector); + if (IS_ERR(priv->fbdev)) { + ret = PTR_ERR(priv->fbdev); + DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret); + priv->fbdev = NULL; + goto out_poll_fini; + } + + ret = drm_dev_register(drm, 0); + if (ret) + goto out_fbdev_fini; + + return 0; + +out_fbdev_fini: + if (priv->fbdev) { + drm_fbdev_cma_fini(priv->fbdev); + priv->fbdev = NULL; + } +out_poll_fini: + drm_kms_helper_poll_fini(drm); + drm_mode_config_cleanup(drm); + drm_vblank_cleanup(drm); +out_unbind: + component_unbind_all(dev, drm); +out_unregister: + dev_set_drvdata(dev, NULL); + drm->dev_private = NULL; + drm_dev_unref(drm); + return ret; +} + +static void zx_drm_unbind(struct device *dev) +{ + struct drm_device *drm = dev_get_drvdata(dev); + struct zx_drm_private *priv = drm->dev_private; + + drm_dev_unregister(drm); + if (priv->fbdev) { + drm_fbdev_cma_fini(priv->fbdev); + priv->fbdev = NULL; + } + drm_kms_helper_poll_fini(drm); + drm_mode_config_cleanup(drm); + drm_vblank_cleanup(drm); + component_unbind_all(dev, drm); + dev_set_drvdata(dev, NULL); + drm->dev_private = NULL; + drm_dev_unref(drm); +} + +static const struct component_master_ops zx_drm_master_ops = { + .bind = zx_drm_bind, + .unbind = zx_drm_unbind, +}; + +static int compare_of(struct device *dev, void *data) +{ + return dev->of_node == data; +} + +static int zx_drm_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *parent = dev->of_node; + struct device_node *child; + struct component_match *match = NULL; + int ret; + + ret = of_platform_populate(parent, NULL, NULL, dev); + if (ret) + return ret; + + for_each_available_child_of_node(parent, child) { + component_match_add(dev, &match, compare_of, child); + of_node_put(child); + } + + return component_master_add_with_match(dev, &zx_drm_master_ops, match); +} + +static int zx_drm_remove(struct platform_device *pdev) +{ + component_master_del(&pdev->dev, &zx_drm_master_ops); + return 0; +} + +static const struct of_device_id zx_drm_of_match[] = { + { .compatible = "zte,zx296718-vou", }, + { /* end */ }, +}; +MODULE_DEVICE_TABLE(of, zx_drm_of_match); + +static struct platform_driver zx_drm_platform_driver = { + .probe = zx_drm_probe, + .remove = zx_drm_remove, + .driver = { + .name = "zx-drm", + .of_match_table = zx_drm_of_match, + }, +}; + +static struct platform_driver *drivers[] = { + &zx_crtc_driver, + &zx_hdmi_driver, + &zx_drm_platform_driver, +}; + +static int zx_drm_init(void) +{ + return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); +} +module_init(zx_drm_init); + +static void zx_drm_exit(void) +{ + platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); +} +module_exit(zx_drm_exit); + +MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>"); +MODULE_DESCRIPTION("ZTE ZX VOU DRM driver"); +MODULE_LICENSE("GPL v2"); |