| /* |
| * 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 <linux/clk.h> |
| #include <drm/drm_crtc_helper.h> |
| #include <drm/drm_fb_cma_helper.h> |
| #include <drm/drm_gem_cma_helper.h> |
| #include <drm/drm_atomic_helper.h> |
| #include <linux/of_reserved_mem.h> |
| |
| #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; |
| |
| if (arcpgu->fbdev) |
| 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; |
| } |
| |
| int arcpgu_gem_mmap(struct file *filp, struct vm_area_struct *vma) |
| { |
| int ret; |
| |
| ret = drm_gem_mmap(filp, vma); |
| if (ret) |
| return ret; |
| |
| vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); |
| return 0; |
| } |
| |
| static const struct file_operations arcpgu_drm_ops = { |
| .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 = no_llseek, |
| .mmap = arcpgu_gem_mmap, |
| }; |
| |
| 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)) { |
| dev_err(drm->dev, "Could not remap IO mem\n"); |
| 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); |
| if (ret < 0) |
| return ret; |
| } else { |
| ret = arcpgu_drm_sim_init(drm, 0); |
| 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_crtc, |
| drm->mode_config.num_connector); |
| if (IS_ERR(arcpgu->fbdev)) { |
| ret = PTR_ERR(arcpgu->fbdev); |
| arcpgu->fbdev = NULL; |
| return -ENODEV; |
| } |
| |
| platform_set_drvdata(pdev, arcpgu); |
| return 0; |
| } |
| |
| 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_vblank_cleanup(drm); |
| drm_mode_config_cleanup(drm); |
| |
| return 0; |
| } |
| |
| static struct drm_driver arcpgu_drm_driver = { |
| .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | |
| DRIVER_ATOMIC, |
| .lastclose = arcpgu_lastclose, |
| .name = "drm-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, |
| .get_vblank_counter = drm_vblank_no_hw_counter, |
| .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, |
| }; |
| |
| static int arcpgu_probe(struct platform_device *pdev) |
| { |
| struct drm_device *drm; |
| int ret; |
| |
| drm = drm_dev_alloc(&arcpgu_drm_driver, &pdev->dev); |
| if (!drm) |
| return -ENOMEM; |
| |
| 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 <palminha@synopsys.com>"); |
| MODULE_DESCRIPTION("ARC PGU DRM driver"); |
| MODULE_LICENSE("GPL"); |