drivers/gpu/drm/zte/zx_drm_drv.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2016 Linaro Ltd.
   4  * Copyright 2016 ZTE Corporation.
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/component.h>
   9 #include <linux/list.h>
  10 #include <linux/module.h>
  11 #include <linux/of_graph.h>
  12 #include <linux/of_platform.h>
  13 #include <linux/spinlock.h>
  14
  15 #include <drm/drm_atomic_helper.h>
  16 #include <drm/drm_crtc.h>
  17 #include <drm/drm_fb_cma_helper.h>
  18 #include <drm/drm_fb_helper.h>
  19 #include <drm/drm_gem_cma_helper.h>
  20 #include <drm/drm_gem_framebuffer_helper.h>
  21 #include <drm/drm_of.h>
  22 #include <drm/drm_probe_helper.h>
  23 #include <drm/drmP.h>
  24
  25 #include "zx_drm_drv.h"
  26 #include "zx_vou.h"
  27
  28 static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
  29         .fb_create = drm_gem_fb_create,
  30         .atomic_check = drm_atomic_helper_check,
  31         .atomic_commit = drm_atomic_helper_commit,
  32 };
  33
  34 DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
  35
  36 static struct drm_driver zx_drm_driver = {
  37         .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
  38                            DRIVER_ATOMIC,
  39         .gem_free_object_unlocked = drm_gem_cma_free_object,
  40         .gem_vm_ops = &drm_gem_cma_vm_ops,
  41         .dumb_create = drm_gem_cma_dumb_create,
  42         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
  43         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
  44         .gem_prime_export = drm_gem_prime_export,
  45         .gem_prime_import = drm_gem_prime_import,
  46         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
  47         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
  48         .gem_prime_vmap = drm_gem_cma_prime_vmap,
  49         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
  50         .gem_prime_mmap = drm_gem_cma_prime_mmap,
  51         .fops = &zx_drm_fops,
  52         .name = "zx-vou",
  53         .desc = "ZTE VOU Controller DRM",
  54         .date = "20160811",
  55         .major = 1,
  56         .minor = 0,
  57 };
  58
  59 static int zx_drm_bind(struct device *dev)
  60 {
  61         struct drm_device *drm;
  62         int ret;
  63
  64         drm = drm_dev_alloc(&zx_drm_driver, dev);
  65         if (IS_ERR(drm))
  66                 return PTR_ERR(drm);
  67
  68         dev_set_drvdata(dev, drm);
  69
  70         drm_mode_config_init(drm);
  71         drm->mode_config.min_width = 16;
  72         drm->mode_config.min_height = 16;
  73         drm->mode_config.max_width = 4096;
  74         drm->mode_config.max_height = 4096;
  75         drm->mode_config.funcs = &zx_drm_mode_config_funcs;
  76
  77         ret = component_bind_all(dev, drm);
  78         if (ret) {
  79                 DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
  80                 goto out_unregister;
  81         }
  82
  83         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
  84         if (ret < 0) {
  85                 DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
  86                 goto out_unbind;
  87         }
  88
  89         /*
  90          * We will manage irq handler on our own.  In this case, irq_enabled
  91          * need to be true for using vblank core support.
  92          */
  93         drm->irq_enabled = true;
  94
  95         drm_mode_config_reset(drm);
  96         drm_kms_helper_poll_init(drm);
  97
  98         ret = drm_dev_register(drm, 0);
  99         if (ret)
 100                 goto out_poll_fini;
 101
 102         drm_fbdev_generic_setup(drm, 32);
 103
 104         return 0;
 105
 106 out_poll_fini:
 107         drm_kms_helper_poll_fini(drm);
 108         drm_mode_config_cleanup(drm);
 109 out_unbind:
 110         component_unbind_all(dev, drm);
 111 out_unregister:
 112         dev_set_drvdata(dev, NULL);
 113         drm_dev_put(drm);
 114         return ret;
 115 }
 116
 117 static void zx_drm_unbind(struct device *dev)
 118 {
 119         struct drm_device *drm = dev_get_drvdata(dev);
 120
 121         drm_dev_unregister(drm);
 122         drm_kms_helper_poll_fini(drm);
 123         drm_atomic_helper_shutdown(drm);
 124         drm_mode_config_cleanup(drm);
 125         component_unbind_all(dev, drm);
 126         dev_set_drvdata(dev, NULL);
 127         drm_dev_put(drm);
 128 }
 129
 130 static const struct component_master_ops zx_drm_master_ops = {
 131         .bind = zx_drm_bind,
 132         .unbind = zx_drm_unbind,
 133 };
 134
 135 static int compare_of(struct device *dev, void *data)
 136 {
 137         return dev->of_node == data;
 138 }
 139
 140 static int zx_drm_probe(struct platform_device *pdev)
 141 {
 142         struct device *dev = &pdev->dev;
 143         struct device_node *parent = dev->of_node;
 144         struct device_node *child;
 145         struct component_match *match = NULL;
 146         int ret;
 147
 148         ret = devm_of_platform_populate(dev);
 149         if (ret)
 150                 return ret;
 151
 152         for_each_available_child_of_node(parent, child)
 153                 component_match_add(dev, &match, compare_of, child);
 154
 155         return component_master_add_with_match(dev, &zx_drm_master_ops, match);
 156 }
 157
 158 static int zx_drm_remove(struct platform_device *pdev)
 159 {
 160         component_master_del(&pdev->dev, &zx_drm_master_ops);
 161         return 0;
 162 }
 163
 164 static const struct of_device_id zx_drm_of_match[] = {
 165         { .compatible = "zte,zx296718-vou", },
 166         { /* end */ },
 167 };
 168 MODULE_DEVICE_TABLE(of, zx_drm_of_match);
 169
 170 static struct platform_driver zx_drm_platform_driver = {
 171         .probe = zx_drm_probe,
 172         .remove = zx_drm_remove,
 173         .driver = {
 174                 .name = "zx-drm",
 175                 .of_match_table = zx_drm_of_match,
 176         },
 177 };
 178
 179 static struct platform_driver *drivers[] = {
 180         &zx_crtc_driver,
 181         &zx_hdmi_driver,
 182         &zx_tvenc_driver,
 183         &zx_vga_driver,
 184         &zx_drm_platform_driver,
 185 };
 186
 187 static int zx_drm_init(void)
 188 {
 189         return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 190 }
 191 module_init(zx_drm_init);
 192
 193 static void zx_drm_exit(void)
 194 {
 195         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 196 }
 197 module_exit(zx_drm_exit);
 198
 199 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
 200 MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
 201 MODULE_LICENSE("GPL v2");