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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2012 Russell King4 */5 6#include <linux/clk.h>7#include <linux/component.h>8#include <linux/module.h>9#include <linux/of.h>10#include <linux/of_graph.h>11#include <linux/platform_device.h>12 13#include <drm/drm_aperture.h>14#include <drm/drm_atomic_helper.h>15#include <drm/drm_drv.h>16#include <drm/drm_ioctl.h>17#include <drm/drm_managed.h>18#include <drm/drm_prime.h>19#include <drm/drm_probe_helper.h>20#include <drm/drm_of.h>21#include <drm/drm_vblank.h>22 23#include "armada_crtc.h"24#include "armada_drm.h"25#include "armada_gem.h"26#include "armada_fb.h"27#include "armada_hw.h"28#include <drm/armada_drm.h>29#include "armada_ioctlP.h"30 31static const struct drm_ioctl_desc armada_ioctls[] = {32 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),33 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),34 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),35};36 37DEFINE_DRM_GEM_FOPS(armada_drm_fops);38 39static const struct drm_driver armada_drm_driver = {40 .gem_prime_import = armada_gem_prime_import,41 .dumb_create = armada_gem_dumb_create,42 .major = 1,43 .minor = 0,44 .name = "armada-drm",45 .desc = "Armada SoC DRM",46 .date = "20120730",47 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,48 .ioctls = armada_ioctls,49 .num_ioctls = ARRAY_SIZE(armada_ioctls),50 .fops = &armada_drm_fops,51};52 53static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = {54 .fb_create = armada_fb_create,55 .atomic_check = drm_atomic_helper_check,56 .atomic_commit = drm_atomic_helper_commit,57};58 59static int armada_drm_bind(struct device *dev)60{61 struct armada_private *priv;62 struct resource *mem = NULL;63 int ret, n;64 65 for (n = 0; ; n++) {66 struct resource *r = platform_get_resource(to_platform_device(dev),67 IORESOURCE_MEM, n);68 if (!r)69 break;70 71 /* Resources above 64K are graphics memory */72 if (resource_size(r) > SZ_64K)73 mem = r;74 else75 return -EINVAL;76 }77 78 if (!mem)79 return -ENXIO;80 81 if (!devm_request_mem_region(dev, mem->start, resource_size(mem),82 "armada-drm"))83 return -EBUSY;84 85 priv = devm_drm_dev_alloc(dev, &armada_drm_driver,86 struct armada_private, drm);87 if (IS_ERR(priv)) {88 dev_err(dev, "[" DRM_NAME ":%s] devm_drm_dev_alloc failed: %li\n",89 __func__, PTR_ERR(priv));90 return PTR_ERR(priv);91 }92 93 /* Remove early framebuffers */94 ret = drm_aperture_remove_framebuffers(&armada_drm_driver);95 if (ret) {96 dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",97 __func__, ret);98 return ret;99 }100 101 dev_set_drvdata(dev, &priv->drm);102 103 /* Mode setting support */104 drm_mode_config_init(&priv->drm);105 priv->drm.mode_config.min_width = 320;106 priv->drm.mode_config.min_height = 200;107 108 /*109 * With vscale enabled, the maximum width is 1920 due to the110 * 1920 by 3 lines RAM111 */112 priv->drm.mode_config.max_width = 1920;113 priv->drm.mode_config.max_height = 2048;114 115 priv->drm.mode_config.preferred_depth = 24;116 priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;117 drm_mm_init(&priv->linear, mem->start, resource_size(mem));118 mutex_init(&priv->linear_lock);119 120 ret = component_bind_all(dev, &priv->drm);121 if (ret)122 goto err_kms;123 124 ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);125 if (ret)126 goto err_comp;127 128 drm_mode_config_reset(&priv->drm);129 130 drm_kms_helper_poll_init(&priv->drm);131 132 ret = drm_dev_register(&priv->drm, 0);133 if (ret)134 goto err_poll;135 136#ifdef CONFIG_DEBUG_FS137 armada_drm_debugfs_init(priv->drm.primary);138#endif139 140 armada_fbdev_setup(&priv->drm);141 142 return 0;143 144 err_poll:145 drm_kms_helper_poll_fini(&priv->drm);146 err_comp:147 component_unbind_all(dev, &priv->drm);148 err_kms:149 drm_mode_config_cleanup(&priv->drm);150 drm_mm_takedown(&priv->linear);151 dev_set_drvdata(dev, NULL);152 return ret;153}154 155static void armada_drm_unbind(struct device *dev)156{157 struct drm_device *drm = dev_get_drvdata(dev);158 struct armada_private *priv = drm_to_armada_dev(drm);159 160 drm_kms_helper_poll_fini(&priv->drm);161 162 drm_dev_unregister(&priv->drm);163 164 drm_atomic_helper_shutdown(&priv->drm);165 166 component_unbind_all(dev, &priv->drm);167 168 drm_mode_config_cleanup(&priv->drm);169 drm_mm_takedown(&priv->linear);170 dev_set_drvdata(dev, NULL);171}172 173static void armada_add_endpoints(struct device *dev,174 struct component_match **match, struct device_node *dev_node)175{176 struct device_node *ep, *remote;177 178 for_each_endpoint_of_node(dev_node, ep) {179 remote = of_graph_get_remote_port_parent(ep);180 if (remote && of_device_is_available(remote))181 drm_of_component_match_add(dev, match, component_compare_of,182 remote);183 of_node_put(remote);184 }185}186 187static const struct component_master_ops armada_master_ops = {188 .bind = armada_drm_bind,189 .unbind = armada_drm_unbind,190};191 192static int armada_drm_probe(struct platform_device *pdev)193{194 struct component_match *match = NULL;195 struct device *dev = &pdev->dev;196 int ret;197 198 ret = drm_of_component_probe(dev, component_compare_dev_name, &armada_master_ops);199 if (ret != -EINVAL)200 return ret;201 202 if (dev->platform_data) {203 char **devices = dev->platform_data;204 struct device *d;205 int i;206 207 for (i = 0; devices[i]; i++)208 component_match_add(dev, &match, component_compare_dev_name,209 devices[i]);210 211 if (i == 0) {212 dev_err(dev, "missing 'ports' property\n");213 return -ENODEV;214 }215 216 for (i = 0; devices[i]; i++) {217 d = bus_find_device_by_name(&platform_bus_type, NULL,218 devices[i]);219 if (d && d->of_node)220 armada_add_endpoints(dev, &match, d->of_node);221 put_device(d);222 }223 }224 225 return component_master_add_with_match(&pdev->dev, &armada_master_ops,226 match);227}228 229static void armada_drm_remove(struct platform_device *pdev)230{231 component_master_del(&pdev->dev, &armada_master_ops);232}233 234static void armada_drm_shutdown(struct platform_device *pdev)235{236 drm_atomic_helper_shutdown(platform_get_drvdata(pdev));237}238 239static const struct platform_device_id armada_drm_platform_ids[] = {240 {241 .name = "armada-drm",242 }, {243 .name = "armada-510-drm",244 },245 { },246};247MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);248 249static struct platform_driver armada_drm_platform_driver = {250 .probe = armada_drm_probe,251 .remove_new = armada_drm_remove,252 .shutdown = armada_drm_shutdown,253 .driver = {254 .name = "armada-drm",255 },256 .id_table = armada_drm_platform_ids,257};258 259static int __init armada_drm_init(void)260{261 int ret;262 263 if (drm_firmware_drivers_only())264 return -ENODEV;265 266 ret = platform_driver_register(&armada_lcd_platform_driver);267 if (ret)268 return ret;269 ret = platform_driver_register(&armada_drm_platform_driver);270 if (ret)271 platform_driver_unregister(&armada_lcd_platform_driver);272 return ret;273}274module_init(armada_drm_init);275 276static void __exit armada_drm_exit(void)277{278 platform_driver_unregister(&armada_drm_platform_driver);279 platform_driver_unregister(&armada_lcd_platform_driver);280}281module_exit(armada_drm_exit);282 283MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");284MODULE_DESCRIPTION("Armada DRM Driver");285MODULE_LICENSE("GPL");286MODULE_ALIAS("platform:armada-drm");287