Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/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
  5  * it under the terms of the GNU General Public License version 2 as
  6  * published by the Free Software Foundation.
  7  */
  8 
  9 #include <linux/clk.h>
 10 
 11 #include "drm.h"
 12 #include "gem.h"
 13 #include "gr2d.h"
 14 
 15 struct gr2d {
 16         struct tegra_drm_client client;
 17         struct host1x_channel *channel;
 18         struct clk *clk;
 19 
 20         DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS);
 21 };
 22 
 23 static inline struct gr2d *to_gr2d(struct tegra_drm_client *client)
 24 {
 25         return container_of(client, struct gr2d, client);
 26 }
 27 
 28 static int gr2d_init(struct host1x_client *client)
 29 {
 30         struct tegra_drm_client *drm = host1x_to_drm_client(client);
 31         struct drm_device *dev = dev_get_drvdata(client->parent);
 32         unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
 33         struct gr2d *gr2d = to_gr2d(drm);
 34 
 35         gr2d->channel = host1x_channel_request(client->dev);
 36         if (!gr2d->channel)
 37                 return -ENOMEM;
 38 
 39         client->syncpts[0] = host1x_syncpt_request(client->dev, flags);
 40         if (!client->syncpts[0]) {
 41                 host1x_channel_free(gr2d->channel);
 42                 return -ENOMEM;
 43         }
 44 
 45         return tegra_drm_register_client(dev->dev_private, drm);
 46 }
 47 
 48 static int gr2d_exit(struct host1x_client *client)
 49 {
 50         struct tegra_drm_client *drm = host1x_to_drm_client(client);
 51         struct drm_device *dev = dev_get_drvdata(client->parent);
 52         struct gr2d *gr2d = to_gr2d(drm);
 53         int err;
 54 
 55         err = tegra_drm_unregister_client(dev->dev_private, drm);
 56         if (err < 0)
 57                 return err;
 58 
 59         host1x_syncpt_free(client->syncpts[0]);
 60         host1x_channel_free(gr2d->channel);
 61 
 62         return 0;
 63 }
 64 
 65 static const struct host1x_client_ops gr2d_client_ops = {
 66         .init = gr2d_init,
 67         .exit = gr2d_exit,
 68 };
 69 
 70 static int gr2d_open_channel(struct tegra_drm_client *client,
 71                              struct tegra_drm_context *context)
 72 {
 73         struct gr2d *gr2d = to_gr2d(client);
 74 
 75         context->channel = host1x_channel_get(gr2d->channel);
 76         if (!context->channel)
 77                 return -ENOMEM;
 78 
 79         return 0;
 80 }
 81 
 82 static void gr2d_close_channel(struct tegra_drm_context *context)
 83 {
 84         host1x_channel_put(context->channel);
 85 }
 86 
 87 static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset)
 88 {
 89         struct gr2d *gr2d = dev_get_drvdata(dev);
 90 
 91         switch (class) {
 92         case HOST1X_CLASS_HOST1X:
 93                 if (offset == 0x2b)
 94                         return 1;
 95 
 96                 break;
 97 
 98         case HOST1X_CLASS_GR2D:
 99         case HOST1X_CLASS_GR2D_SB:
100                 if (offset >= GR2D_NUM_REGS)
101                         break;
102 
103                 if (test_bit(offset, gr2d->addr_regs))
104                         return 1;
105 
106                 break;
107         }
108 
109         return 0;
110 }
111 
112 static const struct tegra_drm_client_ops gr2d_ops = {
113         .open_channel = gr2d_open_channel,
114         .close_channel = gr2d_close_channel,
115         .is_addr_reg = gr2d_is_addr_reg,
116         .submit = tegra_drm_submit,
117 };
118 
119 static const struct of_device_id gr2d_match[] = {
120         { .compatible = "nvidia,tegra30-gr2d" },
121         { .compatible = "nvidia,tegra20-gr2d" },
122         { },
123 };
124 
125 static const u32 gr2d_addr_regs[] = {
126         GR2D_UA_BASE_ADDR,
127         GR2D_VA_BASE_ADDR,
128         GR2D_PAT_BASE_ADDR,
129         GR2D_DSTA_BASE_ADDR,
130         GR2D_DSTB_BASE_ADDR,
131         GR2D_DSTC_BASE_ADDR,
132         GR2D_SRCA_BASE_ADDR,
133         GR2D_SRCB_BASE_ADDR,
134         GR2D_SRC_BASE_ADDR_SB,
135         GR2D_DSTA_BASE_ADDR_SB,
136         GR2D_DSTB_BASE_ADDR_SB,
137         GR2D_UA_BASE_ADDR_SB,
138         GR2D_VA_BASE_ADDR_SB,
139 };
140 
141 static int gr2d_probe(struct platform_device *pdev)
142 {
143         struct device *dev = &pdev->dev;
144         struct host1x_syncpt **syncpts;
145         struct gr2d *gr2d;
146         unsigned int i;
147         int err;
148 
149         gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
150         if (!gr2d)
151                 return -ENOMEM;
152 
153         syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
154         if (!syncpts)
155                 return -ENOMEM;
156 
157         gr2d->clk = devm_clk_get(dev, NULL);
158         if (IS_ERR(gr2d->clk)) {
159                 dev_err(dev, "cannot get clock\n");
160                 return PTR_ERR(gr2d->clk);
161         }
162 
163         err = clk_prepare_enable(gr2d->clk);
164         if (err) {
165                 dev_err(dev, "cannot turn on clock\n");
166                 return err;
167         }
168 
169         INIT_LIST_HEAD(&gr2d->client.base.list);
170         gr2d->client.base.ops = &gr2d_client_ops;
171         gr2d->client.base.dev = dev;
172         gr2d->client.base.class = HOST1X_CLASS_GR2D;
173         gr2d->client.base.syncpts = syncpts;
174         gr2d->client.base.num_syncpts = 1;
175 
176         INIT_LIST_HEAD(&gr2d->client.list);
177         gr2d->client.ops = &gr2d_ops;
178 
179         err = host1x_client_register(&gr2d->client.base);
180         if (err < 0) {
181                 dev_err(dev, "failed to register host1x client: %d\n", err);
182                 clk_disable_unprepare(gr2d->clk);
183                 return err;
184         }
185 
186         /* initialize address register map */
187         for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++)
188                 set_bit(gr2d_addr_regs[i], gr2d->addr_regs);
189 
190         platform_set_drvdata(pdev, gr2d);
191 
192         return 0;
193 }
194 
195 static int gr2d_remove(struct platform_device *pdev)
196 {
197         struct gr2d *gr2d = platform_get_drvdata(pdev);
198         int err;
199 
200         err = host1x_client_unregister(&gr2d->client.base);
201         if (err < 0) {
202                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
203                         err);
204                 return err;
205         }
206 
207         clk_disable_unprepare(gr2d->clk);
208 
209         return 0;
210 }
211 
212 struct platform_driver tegra_gr2d_driver = {
213         .driver = {
214                 .name = "tegra-gr2d",
215                 .of_match_table = gr2d_match,
216         },
217         .probe = gr2d_probe,
218         .remove = gr2d_remove,
219 };
220 

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