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