drm: Add NVIDIA Tegra20 support

This commit adds a KMS driver for the Tegra20 SoC. This includes basic
support for host1x and the two display controllers found on the Tegra20
SoC. Each display controller can drive a separate RGB/LVDS output.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Mark Zhang <markz@nvidia.com>
Reviewed-by: Mark Zhang <markz@nvidia.com>
Tested-by: Mark Zhang <markz@nvidia.com>
Tested-and-acked-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 115 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
new file mode 100644
index 000000000000..3a503c9e4686
--- /dev/null
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2012 Avionic Design GmbH
+ * Copyright (C) 2012 NVIDIA CORPORATION.  All rights reserved.
+ *
+ * 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/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+
+#include <mach/clk.h>
+#include <linux/dma-mapping.h>
+#include <asm/dma-iommu.h>
+
+#include "drm.h"
+
+#define DRIVER_NAME "tegra"
+#define DRIVER_DESC "NVIDIA Tegra graphics"
+#define DRIVER_DATE "20120330"
+#define DRIVER_MAJOR 0
+#define DRIVER_MINOR 0
+#define DRIVER_PATCHLEVEL 0
+
+static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
+{
+        struct device *dev = drm->dev;
+        struct host1x *host1x;
+        int err;
+
+        host1x = dev_get_drvdata(dev);
+        drm->dev_private = host1x;
+        host1x->drm = drm;
+
+        drm_mode_config_init(drm);
+
+        err = host1x_drm_init(host1x, drm);
+        if (err < 0)
+                return err;
+
+        err = tegra_drm_fb_init(drm);
+        if (err < 0)
+                return err;
+
+        drm_kms_helper_poll_init(drm);
+
+        return 0;
+}
+
+static int tegra_drm_unload(struct drm_device *drm)
+{
+        drm_kms_helper_poll_fini(drm);
+        tegra_drm_fb_exit(drm);
+
+        drm_mode_config_cleanup(drm);
+
+        return 0;
+}
+
+static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
+{
+        return 0;
+}
+
+static void tegra_drm_lastclose(struct drm_device *drm)
+{
+        struct host1x *host1x = drm->dev_private;
+
+        drm_fbdev_cma_restore_mode(host1x->fbdev);
+}
+
+static struct drm_ioctl_desc tegra_drm_ioctls[] = {
+};
+
+static const struct file_operations tegra_drm_fops = {
+        .owner = THIS_MODULE,
+        .open = drm_open,
+        .release = drm_release,
+        .unlocked_ioctl = drm_ioctl,
+        .mmap = drm_gem_cma_mmap,
+        .poll = drm_poll,
+        .fasync = drm_fasync,
+        .read = drm_read,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl = drm_compat_ioctl,
+#endif
+        .llseek = noop_llseek,
+};
+
+struct drm_driver tegra_drm_driver = {
+        .driver_features = DRIVER_BUS_PLATFORM | DRIVER_MODESET | DRIVER_GEM,
+        .load = tegra_drm_load,
+        .unload = tegra_drm_unload,
+        .open = tegra_drm_open,
+        .lastclose = tegra_drm_lastclose,
+
+        .gem_free_object = drm_gem_cma_free_object,
+        .gem_vm_ops = &drm_gem_cma_vm_ops,
+        .dumb_create = drm_gem_cma_dumb_create,
+        .dumb_map_offset = drm_gem_cma_dumb_map_offset,
+        .dumb_destroy = drm_gem_cma_dumb_destroy,
+
+        .ioctls = tegra_drm_ioctls,
+        .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
+        .fops = &tegra_drm_fops,
+
+        .name = DRIVER_NAME,
+        .desc = DRIVER_DESC,
+        .date = DRIVER_DATE,
+        .major = DRIVER_MAJOR,
+        .minor = DRIVER_MINOR,
+        .patchlevel = DRIVER_PATCHLEVEL,
+};