drm/tegra: Add VIC support

This patch adds support for Video Image Compositor engine which
can be used for 2d operations.

Signed-off-by: Andrew Chew <achew@nvidia.com>
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 396 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tegra/vic.c b/drivers/gpu/drm/tegra/vic.c
new file mode 100644
index 000000000000..cd804e404a11
--- /dev/null
+++ b/drivers/gpu/drm/tegra/vic.c
@@ -0,0 +1,396 @@
+/*
+ * Copyright (c) 2015, 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 <linux/host1x.h>
+#include <linux/iommu.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include <soc/tegra/pmc.h>
+
+#include "drm.h"
+#include "falcon.h"
+#include "vic.h"
+
+struct vic_config {
+        const char *firmware;
+};
+
+struct vic {
+        struct falcon falcon;
+        bool booted;
+
+        void __iomem *regs;
+        struct tegra_drm_client client;
+        struct host1x_channel *channel;
+        struct iommu_domain *domain;
+        struct device *dev;
+        struct clk *clk;
+
+        /* Platform configuration */
+        const struct vic_config *config;
+};
+
+static inline struct vic *to_vic(struct tegra_drm_client *client)
+{
+        return container_of(client, struct vic, client);
+}
+
+static void vic_writel(struct vic *vic, u32 value, unsigned int offset)
+{
+        writel(value, vic->regs + offset);
+}
+
+static int vic_runtime_resume(struct device *dev)
+{
+        struct vic *vic = dev_get_drvdata(dev);
+
+        return clk_prepare_enable(vic->clk);
+}
+
+static int vic_runtime_suspend(struct device *dev)
+{
+        struct vic *vic = dev_get_drvdata(dev);
+
+        clk_disable_unprepare(vic->clk);
+
+        vic->booted = false;
+
+        return 0;
+}
+
+static int vic_boot(struct vic *vic)
+{
+        u32 fce_ucode_size, fce_bin_data_offset;
+        void *hdr;
+        int err = 0;
+
+        if (vic->booted)
+                return 0;
+
+        /* setup clockgating registers */
+        vic_writel(vic, CG_IDLE_CG_DLY_CNT(4) |
+                        CG_IDLE_CG_EN |
+                        CG_WAKEUP_DLY_CNT(4),
+                   NV_PVIC_MISC_PRI_VIC_CG);
+
+        err = falcon_boot(&vic->falcon);
+        if (err < 0)
+                return err;
+
+        hdr = vic->falcon.firmware.vaddr;
+        fce_bin_data_offset = *(u32 *)(hdr + VIC_UCODE_FCE_DATA_OFFSET);
+        hdr = vic->falcon.firmware.vaddr +
+                *(u32 *)(hdr + VIC_UCODE_FCE_HEADER_OFFSET);
+        fce_ucode_size = *(u32 *)(hdr + FCE_UCODE_SIZE_OFFSET);
+
+        falcon_execute_method(&vic->falcon, VIC_SET_APPLICATION_ID, 1);
+        falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_SIZE,
+                              fce_ucode_size);
+        falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_OFFSET,
+                              (vic->falcon.firmware.paddr + fce_bin_data_offset)
+                                >> 8);
+
+        err = falcon_wait_idle(&vic->falcon);
+        if (err < 0) {
+                dev_err(vic->dev,
+                        "failed to set application ID and FCE base\n");
+                return err;
+        }
+
+        vic->booted = true;
+
+        return 0;
+}
+
+static void *vic_falcon_alloc(struct falcon *falcon, size_t size,
+                               dma_addr_t *iova)
+{
+        struct tegra_drm *tegra = falcon->data;
+
+        return tegra_drm_alloc(tegra, size, iova);
+}
+
+static void vic_falcon_free(struct falcon *falcon, size_t size,
+                            dma_addr_t iova, void *va)
+{
+        struct tegra_drm *tegra = falcon->data;
+
+        return tegra_drm_free(tegra, size, va, iova);
+}
+
+static const struct falcon_ops vic_falcon_ops = {
+        .alloc = vic_falcon_alloc,
+        .free = vic_falcon_free
+};
+
+static int vic_init(struct host1x_client *client)
+{
+        struct tegra_drm_client *drm = host1x_to_drm_client(client);
+        struct drm_device *dev = dev_get_drvdata(client->parent);
+        struct tegra_drm *tegra = dev->dev_private;
+        struct vic *vic = to_vic(drm);
+        int err;
+
+        if (tegra->domain) {
+                err = iommu_attach_device(tegra->domain, vic->dev);
+                if (err < 0) {
+                        dev_err(vic->dev, "failed to attach to domain: %d\n",
+                                err);
+                        return err;
+                }
+
+                vic->domain = tegra->domain;
+        }
+
+        if (!vic->falcon.data) {
+                vic->falcon.data = tegra;
+                err = falcon_load_firmware(&vic->falcon);
+                if (err < 0)
+                        goto detach_device;
+        }
+
+        vic->channel = host1x_channel_request(client->dev);
+        if (!vic->channel) {
+                err = -ENOMEM;
+                goto detach_device;
+        }
+
+        client->syncpts[0] = host1x_syncpt_request(client->dev, 0);
+        if (!client->syncpts[0]) {
+                err = -ENOMEM;
+                goto free_channel;
+        }
+
+        err = tegra_drm_register_client(tegra, drm);
+        if (err < 0)
+                goto free_syncpt;
+
+        return 0;
+
+free_syncpt:
+        host1x_syncpt_free(client->syncpts[0]);
+free_channel:
+        host1x_channel_free(vic->channel);
+detach_device:
+        if (tegra->domain)
+                iommu_detach_device(tegra->domain, vic->dev);
+
+        return err;
+}
+
+static int vic_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 tegra_drm *tegra = dev->dev_private;
+        struct vic *vic = to_vic(drm);
+        int err;
+
+        err = tegra_drm_unregister_client(tegra, drm);
+        if (err < 0)
+                return err;
+
+        host1x_syncpt_free(client->syncpts[0]);
+        host1x_channel_free(vic->channel);
+
+        if (vic->domain) {
+                iommu_detach_device(vic->domain, vic->dev);
+                vic->domain = NULL;
+        }
+
+        return 0;
+}
+
+static const struct host1x_client_ops vic_client_ops = {
+        .init = vic_init,
+        .exit = vic_exit,
+};
+
+static int vic_open_channel(struct tegra_drm_client *client,
+                            struct tegra_drm_context *context)
+{
+        struct vic *vic = to_vic(client);
+        int err;
+
+        err = pm_runtime_get_sync(vic->dev);
+        if (err < 0)
+                return err;
+
+        err = vic_boot(vic);
+        if (err < 0) {
+                pm_runtime_put(vic->dev);
+                return err;
+        }
+
+        context->channel = host1x_channel_get(vic->channel);
+        if (!context->channel) {
+                pm_runtime_put(vic->dev);
+                return -ENOMEM;
+        }
+
+        return 0;
+}
+
+static void vic_close_channel(struct tegra_drm_context *context)
+{
+        struct vic *vic = to_vic(context->client);
+
+        host1x_channel_put(context->channel);
+
+        pm_runtime_put(vic->dev);
+}
+
+static const struct tegra_drm_client_ops vic_ops = {
+        .open_channel = vic_open_channel,
+        .close_channel = vic_close_channel,
+        .submit = tegra_drm_submit,
+};
+
+static const struct vic_config vic_t124_config = {
+        .firmware = "nvidia/tegra124/vic03_ucode.bin",
+};
+
+static const struct vic_config vic_t210_config = {
+        .firmware = "nvidia/tegra210/vic04_ucode.bin",
+};
+
+static const struct of_device_id vic_match[] = {
+        { .compatible = "nvidia,tegra124-vic", .data = &vic_t124_config },
+        { .compatible = "nvidia,tegra210-vic", .data = &vic_t210_config },
+        { },
+};
+
+static int vic_probe(struct platform_device *pdev)
+{
+        struct vic_config *vic_config = NULL;
+        struct device *dev = &pdev->dev;
+        struct host1x_syncpt **syncpts;
+        struct resource *regs;
+        const struct of_device_id *match;
+        struct vic *vic;
+        int err;
+
+        match = of_match_device(vic_match, dev);
+        vic_config = (struct vic_config *)match->data;
+
+        vic = devm_kzalloc(dev, sizeof(*vic), GFP_KERNEL);
+        if (!vic)
+                return -ENOMEM;
+
+        syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
+        if (!syncpts)
+                return -ENOMEM;
+
+        regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!regs) {
+                dev_err(&pdev->dev, "failed to get registers\n");
+                return -ENXIO;
+        }
+
+        vic->regs = devm_ioremap_resource(dev, regs);
+        if (IS_ERR(vic->regs))
+                return PTR_ERR(vic->regs);
+
+        vic->clk = devm_clk_get(dev, NULL);
+        if (IS_ERR(vic->clk)) {
+                dev_err(&pdev->dev, "failed to get clock\n");
+                return PTR_ERR(vic->clk);
+        }
+
+        vic->falcon.dev = dev;
+        vic->falcon.regs = vic->regs;
+        vic->falcon.ops = &vic_falcon_ops;
+
+        err = falcon_init(&vic->falcon);
+        if (err < 0)
+                return err;
+
+        err = falcon_read_firmware(&vic->falcon, vic_config->firmware);
+        if (err < 0)
+                goto exit_falcon;
+
+        platform_set_drvdata(pdev, vic);
+
+        INIT_LIST_HEAD(&vic->client.base.list);
+        vic->client.base.ops = &vic_client_ops;
+        vic->client.base.dev = dev;
+        vic->client.base.class = HOST1X_CLASS_VIC;
+        vic->client.base.syncpts = syncpts;
+        vic->client.base.num_syncpts = 1;
+        vic->dev = dev;
+        vic->config = vic_config;
+
+        INIT_LIST_HEAD(&vic->client.list);
+        vic->client.ops = &vic_ops;
+
+        err = host1x_client_register(&vic->client.base);
+        if (err < 0) {
+                dev_err(dev, "failed to register host1x client: %d\n", err);
+                platform_set_drvdata(pdev, NULL);
+                goto exit_falcon;
+        }
+
+        pm_runtime_enable(&pdev->dev);
+        if (!pm_runtime_enabled(&pdev->dev)) {
+                err = vic_runtime_resume(&pdev->dev);
+                if (err < 0)
+                        goto unregister_client;
+        }
+
+        return 0;
+
+unregister_client:
+        host1x_client_unregister(&vic->client.base);
+exit_falcon:
+        falcon_exit(&vic->falcon);
+
+        return err;
+}
+
+static int vic_remove(struct platform_device *pdev)
+{
+        struct vic *vic = platform_get_drvdata(pdev);
+        int err;
+
+        err = host1x_client_unregister(&vic->client.base);
+        if (err < 0) {
+                dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
+                        err);
+                return err;
+        }
+
+        if (pm_runtime_enabled(&pdev->dev))
+                pm_runtime_disable(&pdev->dev);
+        else
+                vic_runtime_suspend(&pdev->dev);
+
+        falcon_exit(&vic->falcon);
+
+        return 0;
+}
+
+static const struct dev_pm_ops vic_pm_ops = {
+        SET_RUNTIME_PM_OPS(vic_runtime_suspend, vic_runtime_resume, NULL)
+};
+
+struct platform_driver tegra_vic_driver = {
+        .driver = {
+                .name = "tegra-vic",
+                .of_match_table = vic_match,
+                .pm = &vic_pm_ops
+        },
+        .probe = vic_probe,
+        .remove = vic_remove,
+};