drivers/gpu/drm/tegra/gr2d.c

   1 /*
   2  * Copyright (c) 2012-2013, NVIDIA Corporation.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include <linux/clk.h>
  18
  19 #include "drm.h"
  20 #include "gem.h"
  21 #include "gr2d.h"
  22
  23 struct gr2d {
  24         struct tegra_drm_client client;
  25         struct host1x_channel *channel;
  26         struct clk *clk;
  27
  28         DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS);
  29 };
  30
  31 static inline struct gr2d *to_gr2d(struct tegra_drm_client *client)
  32 {
  33         return container_of(client, struct gr2d, client);
  34 }
  35
  36 static int gr2d_init(struct host1x_client *client)
  37 {
  38         struct tegra_drm_client *drm = host1x_to_drm_client(client);
  39         struct tegra_drm *tegra = dev_get_drvdata(client->parent);
  40         unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
  41         struct gr2d *gr2d = to_gr2d(drm);
  42
  43         gr2d->channel = host1x_channel_request(client->dev);
  44         if (!gr2d->channel)
  45                 return -ENOMEM;
  46
  47         client->syncpts[0] = host1x_syncpt_request(client->dev, flags);
  48         if (!client->syncpts[0]) {
  49                 host1x_channel_free(gr2d->channel);
  50                 return -ENOMEM;
  51         }
  52
  53         return tegra_drm_register_client(tegra, drm);
  54 }
  55
  56 static int gr2d_exit(struct host1x_client *client)
  57 {
  58         struct tegra_drm_client *drm = host1x_to_drm_client(client);
  59         struct tegra_drm *tegra = dev_get_drvdata(client->parent);
  60         struct gr2d *gr2d = to_gr2d(drm);
  61         int err;
  62
  63         err = tegra_drm_unregister_client(tegra, drm);
  64         if (err < 0)
  65                 return err;
  66
  67         host1x_syncpt_free(client->syncpts[0]);
  68         host1x_channel_free(gr2d->channel);
  69
  70         return 0;
  71 }
  72
  73 static const struct host1x_client_ops gr2d_client_ops = {
  74         .init = gr2d_init,
  75         .exit = gr2d_exit,
  76 };
  77
  78 static int gr2d_open_channel(struct tegra_drm_client *client,
  79                              struct tegra_drm_context *context)
  80 {
  81         struct gr2d *gr2d = to_gr2d(client);
  82
  83         context->channel = host1x_channel_get(gr2d->channel);
  84         if (!context->channel)
  85                 return -ENOMEM;
  86
  87         return 0;
  88 }
  89
  90 static void gr2d_close_channel(struct tegra_drm_context *context)
  91 {
  92         host1x_channel_put(context->channel);
  93 }
  94
  95 static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset)
  96 {
  97         struct gr2d *gr2d = dev_get_drvdata(dev);
  98
  99         switch (class) {
 100         case HOST1X_CLASS_HOST1X:
 101                 if (offset == 0x2b)
 102                         return 1;
 103
 104                 break;
 105
 106         case HOST1X_CLASS_GR2D:
 107         case HOST1X_CLASS_GR2D_SB:
 108                 if (offset >= GR2D_NUM_REGS)
 109                         break;
 110
 111                 if (test_bit(offset, gr2d->addr_regs))
 112                         return 1;
 113
 114                 break;
 115         }
 116
 117         return 0;
 118 }
 119
 120 static const struct tegra_drm_client_ops gr2d_ops = {
 121         .open_channel = gr2d_open_channel,
 122         .close_channel = gr2d_close_channel,
 123         .is_addr_reg = gr2d_is_addr_reg,
 124         .submit = tegra_drm_submit,
 125 };
 126
 127 static const struct of_device_id gr2d_match[] = {
 128         { .compatible = "nvidia,tegra30-gr2d" },
 129         { .compatible = "nvidia,tegra20-gr2d" },
 130         { },
 131 };
 132
 133 static const u32 gr2d_addr_regs[] = {
 134         GR2D_UA_BASE_ADDR,
 135         GR2D_VA_BASE_ADDR,
 136         GR2D_PAT_BASE_ADDR,
 137         GR2D_DSTA_BASE_ADDR,
 138         GR2D_DSTB_BASE_ADDR,
 139         GR2D_DSTC_BASE_ADDR,
 140         GR2D_SRCA_BASE_ADDR,
 141         GR2D_SRCB_BASE_ADDR,
 142         GR2D_SRC_BASE_ADDR_SB,
 143         GR2D_DSTA_BASE_ADDR_SB,
 144         GR2D_DSTB_BASE_ADDR_SB,
 145         GR2D_UA_BASE_ADDR_SB,
 146         GR2D_VA_BASE_ADDR_SB,
 147 };
 148
 149 static int gr2d_probe(struct platform_device *pdev)
 150 {
 151         struct device *dev = &pdev->dev;
 152         struct host1x_syncpt **syncpts;
 153         struct gr2d *gr2d;
 154         unsigned int i;
 155         int err;
 156
 157         gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
 158         if (!gr2d)
 159                 return -ENOMEM;
 160
 161         syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
 162         if (!syncpts)
 163                 return -ENOMEM;
 164
 165         gr2d->clk = devm_clk_get(dev, NULL);
 166         if (IS_ERR(gr2d->clk)) {
 167                 dev_err(dev, "cannot get clock\n");
 168                 return PTR_ERR(gr2d->clk);
 169         }
 170
 171         err = clk_prepare_enable(gr2d->clk);
 172         if (err) {
 173                 dev_err(dev, "cannot turn on clock\n");
 174                 return err;
 175         }
 176
 177         INIT_LIST_HEAD(&gr2d->client.base.list);
 178         gr2d->client.base.ops = &gr2d_client_ops;
 179         gr2d->client.base.dev = dev;
 180         gr2d->client.base.class = HOST1X_CLASS_GR2D;
 181         gr2d->client.base.syncpts = syncpts;
 182         gr2d->client.base.num_syncpts = 1;
 183
 184         INIT_LIST_HEAD(&gr2d->client.list);
 185         gr2d->client.ops = &gr2d_ops;
 186
 187         err = host1x_client_register(&gr2d->client.base);
 188         if (err < 0) {
 189                 dev_err(dev, "failed to register host1x client: %d\n", err);
 190                 clk_disable_unprepare(gr2d->clk);
 191                 return err;
 192         }
 193
 194         /* initialize address register map */
 195         for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++)
 196                 set_bit(gr2d_addr_regs[i], gr2d->addr_regs);
 197
 198         platform_set_drvdata(pdev, gr2d);
 199
 200         return 0;
 201 }
 202
 203 static int gr2d_remove(struct platform_device *pdev)
 204 {
 205         struct gr2d *gr2d = platform_get_drvdata(pdev);
 206         int err;
 207
 208         err = host1x_client_unregister(&gr2d->client.base);
 209         if (err < 0) {
 210                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
 211                         err);
 212                 return err;
 213         }
 214
 215         clk_disable_unprepare(gr2d->clk);
 216
 217         return 0;
 218 }
 219
 220 struct platform_driver tegra_gr2d_driver = {
 221         .driver = {
 222                 .name = "tegra-gr2d",
 223                 .of_match_table = gr2d_match,
 224         },
 225         .probe = gr2d_probe,
 226         .remove = gr2d_remove,
 227 };