drivers/gpu/drm/zte/zx_drm_drv.c

   1 /*
   2  * Copyright 2016 Linaro Ltd.
   3  * Copyright 2016 ZTE Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  */
  10
  11 #include <linux/clk.h>
  12 #include <linux/component.h>
  13 #include <linux/list.h>
  14 #include <linux/module.h>
  15 #include <linux/of_graph.h>
  16 #include <linux/of_platform.h>
  17 #include <linux/spinlock.h>
  18
  19 #include <drm/drm_atomic_helper.h>
  20 #include <drm/drm_crtc.h>
  21 #include <drm/drm_crtc_helper.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/drmP.h>
  28
  29 #include "zx_drm_drv.h"
  30 #include "zx_vou.h"
  31
  32 static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
  33         .fb_create = drm_gem_fb_create,
  34         .output_poll_changed = drm_fb_helper_output_poll_changed,
  35         .atomic_check = drm_atomic_helper_check,
  36         .atomic_commit = drm_atomic_helper_commit,
  37 };
  38
  39 DEFINE_DRM_GEM_CMA_FOPS(zx_drm_fops);
  40
  41 static struct drm_driver zx_drm_driver = {
  42         .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
  43                            DRIVER_ATOMIC,
  44         .lastclose = drm_fb_helper_lastclose,
  45         .gem_free_object_unlocked = drm_gem_cma_free_object,
  46         .gem_vm_ops = &drm_gem_cma_vm_ops,
  47         .dumb_create = drm_gem_cma_dumb_create,
  48         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
  49         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
  50         .gem_prime_export = drm_gem_prime_export,
  51         .gem_prime_import = drm_gem_prime_import,
  52         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
  53         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
  54         .gem_prime_vmap = drm_gem_cma_prime_vmap,
  55         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
  56         .gem_prime_mmap = drm_gem_cma_prime_mmap,
  57         .fops = &zx_drm_fops,
  58         .name = "zx-vou",
  59         .desc = "ZTE VOU Controller DRM",
  60         .date = "20160811",
  61         .major = 1,
  62         .minor = 0,
  63 };
  64
  65 static int zx_drm_bind(struct device *dev)
  66 {
  67         struct drm_device *drm;
  68         int ret;
  69
  70         drm = drm_dev_alloc(&zx_drm_driver, dev);
  71         if (IS_ERR(drm))
  72                 return PTR_ERR(drm);
  73
  74         dev_set_drvdata(dev, drm);
  75
  76         drm_mode_config_init(drm);
  77         drm->mode_config.min_width = 16;
  78         drm->mode_config.min_height = 16;
  79         drm->mode_config.max_width = 4096;
  80         drm->mode_config.max_height = 4096;
  81         drm->mode_config.funcs = &zx_drm_mode_config_funcs;
  82
  83         ret = component_bind_all(dev, drm);
  84         if (ret) {
  85                 DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
  86                 goto out_unregister;
  87         }
  88
  89         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
  90         if (ret < 0) {
  91                 DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
  92                 goto out_unbind;
  93         }
  94
  95         /*
  96          * We will manage irq handler on our own.  In this case, irq_enabled
  97          * need to be true for using vblank core support.
  98          */
  99         drm->irq_enabled = true;
 100
 101         drm_mode_config_reset(drm);
 102         drm_kms_helper_poll_init(drm);
 103
 104         ret = drm_fb_cma_fbdev_init(drm, 32, 0);
 105         if (ret) {
 106                 DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret);
 107                 goto out_poll_fini;
 108         }
 109
 110         ret = drm_dev_register(drm, 0);
 111         if (ret)
 112                 goto out_fbdev_fini;
 113
 114         return 0;
 115
 116 out_fbdev_fini:
 117         drm_fb_cma_fbdev_fini(drm);
 118 out_poll_fini:
 119         drm_kms_helper_poll_fini(drm);
 120         drm_mode_config_cleanup(drm);
 121 out_unbind:
 122         component_unbind_all(dev, drm);
 123 out_unregister:
 124         dev_set_drvdata(dev, NULL);
 125         drm_dev_unref(drm);
 126         return ret;
 127 }
 128
 129 static void zx_drm_unbind(struct device *dev)
 130 {
 131         struct drm_device *drm = dev_get_drvdata(dev);
 132
 133         drm_dev_unregister(drm);
 134         drm_fb_cma_fbdev_fini(drm);
 135         drm_kms_helper_poll_fini(drm);
 136         drm_mode_config_cleanup(drm);
 137         component_unbind_all(dev, drm);
 138         dev_set_drvdata(dev, NULL);
 139         drm_dev_unref(drm);
 140 }
 141
 142 static const struct component_master_ops zx_drm_master_ops = {
 143         .bind = zx_drm_bind,
 144         .unbind = zx_drm_unbind,
 145 };
 146
 147 static int compare_of(struct device *dev, void *data)
 148 {
 149         return dev->of_node == data;
 150 }
 151
 152 static int zx_drm_probe(struct platform_device *pdev)
 153 {
 154         struct device *dev = &pdev->dev;
 155         struct device_node *parent = dev->of_node;
 156         struct device_node *child;
 157         struct component_match *match = NULL;
 158         int ret;
 159
 160         ret = devm_of_platform_populate(dev);
 161         if (ret)
 162                 return ret;
 163
 164         for_each_available_child_of_node(parent, child) {
 165                 component_match_add(dev, &match, compare_of, child);
 166                 of_node_put(child);
 167         }
 168
 169         return component_master_add_with_match(dev, &zx_drm_master_ops, match);
 170 }
 171
 172 static int zx_drm_remove(struct platform_device *pdev)
 173 {
 174         component_master_del(&pdev->dev, &zx_drm_master_ops);
 175         return 0;
 176 }
 177
 178 static const struct of_device_id zx_drm_of_match[] = {
 179         { .compatible = "zte,zx296718-vou", },
 180         { /* end */ },
 181 };
 182 MODULE_DEVICE_TABLE(of, zx_drm_of_match);
 183
 184 static struct platform_driver zx_drm_platform_driver = {
 185         .probe = zx_drm_probe,
 186         .remove = zx_drm_remove,
 187         .driver = {
 188                 .name = "zx-drm",
 189                 .of_match_table = zx_drm_of_match,
 190         },
 191 };
 192
 193 static struct platform_driver *drivers[] = {
 194         &zx_crtc_driver,
 195         &zx_hdmi_driver,
 196         &zx_tvenc_driver,
 197         &zx_vga_driver,
 198         &zx_drm_platform_driver,
 199 };
 200
 201 static int zx_drm_init(void)
 202 {
 203         return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 204 }
 205 module_init(zx_drm_init);
 206
 207 static void zx_drm_exit(void)
 208 {
 209         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 210 }
 211 module_exit(zx_drm_exit);
 212
 213 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
 214 MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
 215 MODULE_LICENSE("GPL v2");