/* * ARC PGU DRM driver. * * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com) * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include #include #include #include #include #include #include "arcpgu.h" #include "arcpgu_regs.h" static void arcpgu_fb_output_poll_changed(struct drm_device *dev) { struct arcpgu_drm_private *arcpgu = dev->dev_private; drm_fbdev_cma_hotplug_event(arcpgu->fbdev); } static struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = { .fb_create = drm_fb_cma_create, .output_poll_changed = arcpgu_fb_output_poll_changed, .atomic_check = drm_atomic_helper_check, .atomic_commit = drm_atomic_helper_commit, }; static void arcpgu_setup_mode_config(struct drm_device *drm) { drm_mode_config_init(drm); drm->mode_config.min_width = 0; drm->mode_config.min_height = 0; drm->mode_config.max_width = 1920; drm->mode_config.max_height = 1080; drm->mode_config.funcs = &arcpgu_drm_modecfg_funcs; } DEFINE_DRM_GEM_CMA_FOPS(arcpgu_drm_ops); static void arcpgu_lastclose(struct drm_device *drm) { struct arcpgu_drm_private *arcpgu = drm->dev_private; drm_fbdev_cma_restore_mode(arcpgu->fbdev); } static int arcpgu_load(struct drm_device *drm) { struct platform_device *pdev = to_platform_device(drm->dev); struct arcpgu_drm_private *arcpgu; struct device_node *encoder_node; struct resource *res; int ret; arcpgu = devm_kzalloc(&pdev->dev, sizeof(*arcpgu), GFP_KERNEL); if (arcpgu == NULL) return -ENOMEM; drm->dev_private = arcpgu; arcpgu->clk = devm_clk_get(drm->dev, "pxlclk"); if (IS_ERR(arcpgu->clk)) return PTR_ERR(arcpgu->clk); arcpgu_setup_mode_config(drm); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); arcpgu->regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(arcpgu->regs)) return PTR_ERR(arcpgu->regs); dev_info(drm->dev, "arc_pgu ID: 0x%x\n", arc_pgu_read(arcpgu, ARCPGU_REG_ID)); /* Get the optional framebuffer memory resource */ ret = of_reserved_mem_device_init(drm->dev); if (ret && ret != -ENODEV) return ret; if (dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32))) return -ENODEV; if (arc_pgu_setup_crtc(drm) < 0) return -ENODEV; /* find the encoder node and initialize it */ encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0); if (encoder_node) { ret = arcpgu_drm_hdmi_init(drm, encoder_node); of_node_put(encoder_node); if (ret < 0) return ret; } else { ret = arcpgu_drm_sim_init(drm, NULL); if (ret < 0) return ret; } drm_mode_config_reset(drm); drm_kms_helper_poll_init(drm); arcpgu->fbdev = drm_fbdev_cma_init(drm, 16, drm->mode_config.num_connector); if (IS_ERR(arcpgu->fbdev)) { ret = PTR_ERR(arcpgu->fbdev); arcpgu->fbdev = NULL; return -ENODEV; } platform_set_drvdata(pdev, drm); return 0; } static int arcpgu_unload(struct drm_device *drm) { struct arcpgu_drm_private *arcpgu = drm->dev_private; if (arcpgu->fbdev) { drm_fbdev_cma_fini(arcpgu->fbdev); arcpgu->fbdev = NULL; } drm_kms_helper_poll_fini(drm); drm_mode_config_cleanup(drm); return 0; } #ifdef CONFIG_DEBUG_FS static int arcpgu_show_pxlclock(struct seq_file *m, void *arg) { struct drm_info_node *node = (struct drm_info_node *)m->private; struct drm_device *drm = node->minor->dev; struct arcpgu_drm_private *arcpgu = drm->dev_private; unsigned long clkrate = clk_get_rate(arcpgu->clk); unsigned long mode_clock = arcpgu->crtc.mode.crtc_clock * 1000; seq_printf(m, "hw : %lu\n", clkrate); seq_printf(m, "mode: %lu\n", mode_clock); return 0; } static struct drm_info_list arcpgu_debugfs_list[] = { { "clocks", arcpgu_show_pxlclock, 0 }, { "fb", drm_fb_cma_debugfs_show, 0 }, }; static int arcpgu_debugfs_init(struct drm_minor *minor) { return drm_debugfs_create_files(arcpgu_debugfs_list, ARRAY_SIZE(arcpgu_debugfs_list), minor->debugfs_root, minor); } #endif static struct drm_driver arcpgu_drm_driver = { .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | DRIVER_ATOMIC, .lastclose = arcpgu_lastclose, .name = "arcpgu", .desc = "ARC PGU Controller", .date = "20160219", .major = 1, .minor = 0, .patchlevel = 0, .fops = &arcpgu_drm_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_free_object_unlocked = drm_gem_cma_free_object, .gem_vm_ops = &drm_gem_cma_vm_ops, .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, #ifdef CONFIG_DEBUG_FS .debugfs_init = arcpgu_debugfs_init, #endif }; static int arcpgu_probe(struct platform_device *pdev) { struct drm_device *drm; int ret; drm = drm_dev_alloc(&arcpgu_drm_driver, &pdev->dev); if (IS_ERR(drm)) return PTR_ERR(drm); ret = arcpgu_load(drm); if (ret) goto err_unref; ret = drm_dev_register(drm, 0); if (ret) goto err_unload; return 0; err_unload: arcpgu_unload(drm); err_unref: drm_dev_unref(drm); return ret; } static int arcpgu_remove(struct platform_device *pdev) { struct drm_device *drm = platform_get_drvdata(pdev); drm_dev_unregister(drm); arcpgu_unload(drm); drm_dev_unref(drm); return 0; } static const struct of_device_id arcpgu_of_table[] = { {.compatible = "snps,arcpgu"}, {} }; MODULE_DEVICE_TABLE(of, arcpgu_of_table); static struct platform_driver arcpgu_platform_driver = { .probe = arcpgu_probe, .remove = arcpgu_remove, .driver = { .name = "arcpgu", .of_match_table = arcpgu_of_table, }, }; module_platform_driver(arcpgu_platform_driver); MODULE_AUTHOR("Carlos Palminha "); MODULE_DESCRIPTION("ARC PGU DRM driver"); MODULE_LICENSE("GPL");