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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/gpu/drm/tegra/gr2d.c
Initial import
Diffstat (limited to 'drivers/gpu/drm/tegra/gr2d.c')
-rw-r--r--drivers/gpu/drm/tegra/gr2d.c220
1 files changed, 220 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/gr2d.c b/drivers/gpu/drm/tegra/gr2d.c
new file mode 100644
index 000000000..02cd3e37a
--- /dev/null
+++ b/drivers/gpu/drm/tegra/gr2d.c
@@ -0,0 +1,220 @@
+/*
+ * Copyright (c) 2012-2013, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+
+#include "drm.h"
+#include "gem.h"
+#include "gr2d.h"
+
+struct gr2d {
+ struct tegra_drm_client client;
+ struct host1x_channel *channel;
+ struct clk *clk;
+
+ DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS);
+};
+
+static inline struct gr2d *to_gr2d(struct tegra_drm_client *client)
+{
+ return container_of(client, struct gr2d, client);
+}
+
+static int gr2d_init(struct host1x_client *client)
+{
+ struct tegra_drm_client *drm = host1x_to_drm_client(client);
+ struct drm_device *dev = dev_get_drvdata(client->parent);
+ unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
+ struct gr2d *gr2d = to_gr2d(drm);
+
+ gr2d->channel = host1x_channel_request(client->dev);
+ if (!gr2d->channel)
+ return -ENOMEM;
+
+ client->syncpts[0] = host1x_syncpt_request(client->dev, flags);
+ if (!client->syncpts[0]) {
+ host1x_channel_free(gr2d->channel);
+ return -ENOMEM;
+ }
+
+ return tegra_drm_register_client(dev->dev_private, drm);
+}
+
+static int gr2d_exit(struct host1x_client *client)
+{
+ struct tegra_drm_client *drm = host1x_to_drm_client(client);
+ struct drm_device *dev = dev_get_drvdata(client->parent);
+ struct gr2d *gr2d = to_gr2d(drm);
+ int err;
+
+ err = tegra_drm_unregister_client(dev->dev_private, drm);
+ if (err < 0)
+ return err;
+
+ host1x_syncpt_free(client->syncpts[0]);
+ host1x_channel_free(gr2d->channel);
+
+ return 0;
+}
+
+static const struct host1x_client_ops gr2d_client_ops = {
+ .init = gr2d_init,
+ .exit = gr2d_exit,
+};
+
+static int gr2d_open_channel(struct tegra_drm_client *client,
+ struct tegra_drm_context *context)
+{
+ struct gr2d *gr2d = to_gr2d(client);
+
+ context->channel = host1x_channel_get(gr2d->channel);
+ if (!context->channel)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void gr2d_close_channel(struct tegra_drm_context *context)
+{
+ host1x_channel_put(context->channel);
+}
+
+static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset)
+{
+ struct gr2d *gr2d = dev_get_drvdata(dev);
+
+ switch (class) {
+ case HOST1X_CLASS_HOST1X:
+ if (offset == 0x2b)
+ return 1;
+
+ break;
+
+ case HOST1X_CLASS_GR2D:
+ case HOST1X_CLASS_GR2D_SB:
+ if (offset >= GR2D_NUM_REGS)
+ break;
+
+ if (test_bit(offset, gr2d->addr_regs))
+ return 1;
+
+ break;
+ }
+
+ return 0;
+}
+
+static const struct tegra_drm_client_ops gr2d_ops = {
+ .open_channel = gr2d_open_channel,
+ .close_channel = gr2d_close_channel,
+ .is_addr_reg = gr2d_is_addr_reg,
+ .submit = tegra_drm_submit,
+};
+
+static const struct of_device_id gr2d_match[] = {
+ { .compatible = "nvidia,tegra30-gr2d" },
+ { .compatible = "nvidia,tegra20-gr2d" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, gr2d_match);
+
+static const u32 gr2d_addr_regs[] = {
+ GR2D_UA_BASE_ADDR,
+ GR2D_VA_BASE_ADDR,
+ GR2D_PAT_BASE_ADDR,
+ GR2D_DSTA_BASE_ADDR,
+ GR2D_DSTB_BASE_ADDR,
+ GR2D_DSTC_BASE_ADDR,
+ GR2D_SRCA_BASE_ADDR,
+ GR2D_SRCB_BASE_ADDR,
+ GR2D_SRC_BASE_ADDR_SB,
+ GR2D_DSTA_BASE_ADDR_SB,
+ GR2D_DSTB_BASE_ADDR_SB,
+ GR2D_UA_BASE_ADDR_SB,
+ GR2D_VA_BASE_ADDR_SB,
+};
+
+static int gr2d_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct host1x_syncpt **syncpts;
+ struct gr2d *gr2d;
+ unsigned int i;
+ int err;
+
+ gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
+ if (!gr2d)
+ return -ENOMEM;
+
+ syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
+ if (!syncpts)
+ return -ENOMEM;
+
+ gr2d->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(gr2d->clk)) {
+ dev_err(dev, "cannot get clock\n");
+ return PTR_ERR(gr2d->clk);
+ }
+
+ err = clk_prepare_enable(gr2d->clk);
+ if (err) {
+ dev_err(dev, "cannot turn on clock\n");
+ return err;
+ }
+
+ INIT_LIST_HEAD(&gr2d->client.base.list);
+ gr2d->client.base.ops = &gr2d_client_ops;
+ gr2d->client.base.dev = dev;
+ gr2d->client.base.class = HOST1X_CLASS_GR2D;
+ gr2d->client.base.syncpts = syncpts;
+ gr2d->client.base.num_syncpts = 1;
+
+ INIT_LIST_HEAD(&gr2d->client.list);
+ gr2d->client.ops = &gr2d_ops;
+
+ err = host1x_client_register(&gr2d->client.base);
+ if (err < 0) {
+ dev_err(dev, "failed to register host1x client: %d\n", err);
+ clk_disable_unprepare(gr2d->clk);
+ return err;
+ }
+
+ /* initialize address register map */
+ for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++)
+ set_bit(gr2d_addr_regs[i], gr2d->addr_regs);
+
+ platform_set_drvdata(pdev, gr2d);
+
+ return 0;
+}
+
+static int gr2d_remove(struct platform_device *pdev)
+{
+ struct gr2d *gr2d = platform_get_drvdata(pdev);
+ int err;
+
+ err = host1x_client_unregister(&gr2d->client.base);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
+ err);
+ return err;
+ }
+
+ clk_disable_unprepare(gr2d->clk);
+
+ return 0;
+}
+
+struct platform_driver tegra_gr2d_driver = {
+ .driver = {
+ .name = "tegra-gr2d",
+ .of_match_table = gr2d_match,
+ },
+ .probe = gr2d_probe,
+ .remove = gr2d_remove,
+};