drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Hisilicon Kirin SoCs drm master driver
   4  *
   5  * Copyright (c) 2016 Linaro Limited.
   6  * Copyright (c) 2014-2016 HiSilicon Limited.
   7  *
   8  * Author:
   9  *      Xinliang Liu <[email protected]>
  10  *      Xinliang Liu <[email protected]>
  11  *      Xinwei Kong <[email protected]>
  12  */
  13
  14 #include <linux/of_platform.h>
  15 #include <linux/component.h>
  16 #include <linux/module.h>
  17 #include <linux/of_graph.h>
  18 #include <linux/platform_device.h>
  19
  20 #include <drm/drm_atomic_helper.h>
  21 #include <drm/drm_drv.h>
  22 #include <drm/drm_fb_cma_helper.h>
  23 #include <drm/drm_fb_helper.h>
  24 #include <drm/drm_gem_cma_helper.h>
  25 #include <drm/drm_gem_framebuffer_helper.h>
  26 #include <drm/drm_of.h>
  27 #include <drm/drm_probe_helper.h>
  28 #include <drm/drm_vblank.h>
  29
  30 #include "kirin_drm_drv.h"
  31
  32 #define KIRIN_MAX_PLANE 2
  33
  34 struct kirin_drm_private {
  35         struct kirin_crtc crtc;
  36         struct kirin_plane planes[KIRIN_MAX_PLANE];
  37         void *hw_ctx;
  38 };
  39
  40 static int kirin_drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
  41                                struct drm_plane *plane,
  42                                const struct kirin_drm_data *driver_data)
  43 {
  44         struct device_node *port;
  45         int ret;
  46
  47         /* set crtc port so that
  48          * drm_of_find_possible_crtcs call works
  49          */
  50         port = of_get_child_by_name(dev->dev->of_node, "port");
  51         if (!port) {
  52                 DRM_ERROR("no port node found in %pOF\n", dev->dev->of_node);
  53                 return -EINVAL;
  54         }
  55         of_node_put(port);
  56         crtc->port = port;
  57
  58         ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL,
  59                                         driver_data->crtc_funcs, NULL);
  60         if (ret) {
  61                 DRM_ERROR("failed to init crtc.\n");
  62                 return ret;
  63         }
  64
  65         drm_crtc_helper_add(crtc, driver_data->crtc_helper_funcs);
  66
  67         return 0;
  68 }
  69
  70 static int kirin_drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
  71                                 enum drm_plane_type type,
  72                                 const struct kirin_drm_data *data)
  73 {
  74         int ret = 0;
  75
  76         ret = drm_universal_plane_init(dev, plane, 1, data->plane_funcs,
  77                                        data->channel_formats,
  78                                        data->channel_formats_cnt,
  79                                        NULL, type, NULL);
  80         if (ret) {
  81                 DRM_ERROR("fail to init plane, ch=%d\n", 0);
  82                 return ret;
  83         }
  84
  85         drm_plane_helper_add(plane, data->plane_helper_funcs);
  86
  87         return 0;
  88 }
  89
  90 static void kirin_drm_private_cleanup(struct drm_device *dev)
  91 {
  92         struct kirin_drm_private *kirin_priv = dev->dev_private;
  93         struct kirin_drm_data *data;
  94
  95         data = (struct kirin_drm_data *)of_device_get_match_data(dev->dev);
  96         if (data->cleanup_hw_ctx)
  97                 data->cleanup_hw_ctx(kirin_priv->hw_ctx);
  98
  99         devm_kfree(dev->dev, kirin_priv);
 100         dev->dev_private = NULL;
 101 }
 102
 103 static int kirin_drm_private_init(struct drm_device *dev,
 104                                   const struct kirin_drm_data *driver_data)
 105 {
 106         struct platform_device *pdev = to_platform_device(dev->dev);
 107         struct kirin_drm_private *kirin_priv;
 108         struct drm_plane *prim_plane;
 109         enum drm_plane_type type;
 110         void *ctx;
 111         int ret;
 112         u32 ch;
 113
 114         kirin_priv = devm_kzalloc(dev->dev, sizeof(*kirin_priv), GFP_KERNEL);
 115         if (!kirin_priv) {
 116                 DRM_ERROR("failed to alloc kirin_drm_private\n");
 117                 return -ENOMEM;
 118         }
 119
 120         ctx = driver_data->alloc_hw_ctx(pdev, &kirin_priv->crtc.base);
 121         if (IS_ERR(ctx)) {
 122                 DRM_ERROR("failed to initialize kirin_priv hw ctx\n");
 123                 return -EINVAL;
 124         }
 125         kirin_priv->hw_ctx = ctx;
 126
 127         /*
 128          * plane init
 129          * TODO: Now only support primary plane, overlay planes
 130          * need to do.
 131          */
 132         for (ch = 0; ch < driver_data->num_planes; ch++) {
 133                 if (ch == driver_data->prim_plane)
 134                         type = DRM_PLANE_TYPE_PRIMARY;
 135                 else
 136                         type = DRM_PLANE_TYPE_OVERLAY;
 137                 ret = kirin_drm_plane_init(dev, &kirin_priv->planes[ch].base,
 138                                            type, driver_data);
 139                 if (ret)
 140                         return ret;
 141                 kirin_priv->planes[ch].ch = ch;
 142                 kirin_priv->planes[ch].hw_ctx = ctx;
 143         }
 144
 145         /* crtc init */
 146         prim_plane = &kirin_priv->planes[driver_data->prim_plane].base;
 147         ret = kirin_drm_crtc_init(dev, &kirin_priv->crtc.base,
 148                                   prim_plane, driver_data);
 149         if (ret)
 150                 return ret;
 151         kirin_priv->crtc.hw_ctx = ctx;
 152         dev->dev_private = kirin_priv;
 153
 154         return 0;
 155 }
 156
 157 static int kirin_drm_kms_init(struct drm_device *dev,
 158                               const struct kirin_drm_data *driver_data)
 159 {
 160         int ret;
 161
 162         /* dev->mode_config initialization */
 163         drm_mode_config_init(dev);
 164         dev->mode_config.min_width = 0;
 165         dev->mode_config.min_height = 0;
 166         dev->mode_config.max_width = driver_data->config_max_width;
 167         dev->mode_config.max_height = driver_data->config_max_width;
 168         dev->mode_config.funcs = driver_data->mode_config_funcs;
 169
 170         /* display controller init */
 171         ret = kirin_drm_private_init(dev, driver_data);
 172         if (ret)
 173                 goto err_mode_config_cleanup;
 174
 175         /* bind and init sub drivers */
 176         ret = component_bind_all(dev->dev, dev);
 177         if (ret) {
 178                 DRM_ERROR("failed to bind all component.\n");
 179                 goto err_private_cleanup;
 180         }
 181
 182         /* vblank init */
 183         ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
 184         if (ret) {
 185                 DRM_ERROR("failed to initialize vblank.\n");
 186                 goto err_unbind_all;
 187         }
 188         /* with irq_enabled = true, we can use the vblank feature. */
 189         dev->irq_enabled = true;
 190
 191         /* reset all the states of crtc/plane/encoder/connector */
 192         drm_mode_config_reset(dev);
 193
 194         /* init kms poll for handling hpd */
 195         drm_kms_helper_poll_init(dev);
 196
 197         return 0;
 198
 199 err_unbind_all:
 200         component_unbind_all(dev->dev, dev);
 201 err_private_cleanup:
 202         kirin_drm_private_cleanup(dev);
 203 err_mode_config_cleanup:
 204         drm_mode_config_cleanup(dev);
 205         return ret;
 206 }
 207
 208 static int compare_of(struct device *dev, void *data)
 209 {
 210         return dev->of_node == data;
 211 }
 212
 213 static int kirin_drm_kms_cleanup(struct drm_device *dev)
 214 {
 215         drm_kms_helper_poll_fini(dev);
 216         kirin_drm_private_cleanup(dev);
 217         drm_mode_config_cleanup(dev);
 218
 219         return 0;
 220 }
 221
 222 static int kirin_drm_bind(struct device *dev)
 223 {
 224         struct kirin_drm_data *driver_data;
 225         struct drm_device *drm_dev;
 226         int ret;
 227
 228         driver_data = (struct kirin_drm_data *)of_device_get_match_data(dev);
 229         if (!driver_data)
 230                 return -EINVAL;
 231
 232         drm_dev = drm_dev_alloc(driver_data->driver, dev);
 233         if (IS_ERR(drm_dev))
 234                 return PTR_ERR(drm_dev);
 235         dev_set_drvdata(dev, drm_dev);
 236
 237         /* display controller init */
 238         ret = kirin_drm_kms_init(drm_dev, driver_data);
 239         if (ret)
 240                 goto err_drm_dev_put;
 241
 242         ret = drm_dev_register(drm_dev, 0);
 243         if (ret)
 244                 goto err_kms_cleanup;
 245
 246         drm_fbdev_generic_setup(drm_dev, 32);
 247
 248         return 0;
 249
 250 err_kms_cleanup:
 251         kirin_drm_kms_cleanup(drm_dev);
 252 err_drm_dev_put:
 253         drm_dev_put(drm_dev);
 254
 255         return ret;
 256 }
 257
 258 static void kirin_drm_unbind(struct device *dev)
 259 {
 260         struct drm_device *drm_dev = dev_get_drvdata(dev);
 261
 262         drm_dev_unregister(drm_dev);
 263         kirin_drm_kms_cleanup(drm_dev);
 264         drm_dev_put(drm_dev);
 265 }
 266
 267 static const struct component_master_ops kirin_drm_ops = {
 268         .bind = kirin_drm_bind,
 269         .unbind = kirin_drm_unbind,
 270 };
 271
 272 static int kirin_drm_platform_probe(struct platform_device *pdev)
 273 {
 274         struct device *dev = &pdev->dev;
 275         struct device_node *np = dev->of_node;
 276         struct component_match *match = NULL;
 277         struct device_node *remote;
 278
 279         remote = of_graph_get_remote_node(np, 0, 0);
 280         if (!remote)
 281                 return -ENODEV;
 282
 283         drm_of_component_match_add(dev, &match, compare_of, remote);
 284         of_node_put(remote);
 285
 286         return component_master_add_with_match(dev, &kirin_drm_ops, match);
 287 }
 288
 289 static int kirin_drm_platform_remove(struct platform_device *pdev)
 290 {
 291         component_master_del(&pdev->dev, &kirin_drm_ops);
 292         return 0;
 293 }
 294
 295 static const struct of_device_id kirin_drm_dt_ids[] = {
 296         { .compatible = "hisilicon,hi6220-ade",
 297           .data = &ade_driver_data,
 298         },
 299         { /* end node */ },
 300 };
 301 MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
 302
 303 static struct platform_driver kirin_drm_platform_driver = {
 304         .probe = kirin_drm_platform_probe,
 305         .remove = kirin_drm_platform_remove,
 306         .driver = {
 307                 .name = "kirin-drm",
 308                 .of_match_table = kirin_drm_dt_ids,
 309         },
 310 };
 311
 312 module_platform_driver(kirin_drm_platform_driver);
 313
 314 MODULE_AUTHOR("Xinliang Liu <[email protected]>");
 315 MODULE_AUTHOR("Xinliang Liu <[email protected]>");
 316 MODULE_AUTHOR("Xinwei Kong <[email protected]>");
 317 MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver");
 318 MODULE_LICENSE("GPL v2");