drm/vc4: Add KMS support for Raspberry Pi.
This is enough for fbcon and bringing up X using
xf86-video-modesetting. It doesn't support the 3D accelerator or
power management yet.
v2: Drop FB_HELPER select thanks to Archit's patches. Do manual init
ordering instead of using the .load hook. Structure registration
more like tegra's, but still using the typical "component" code.
Drop no-op hooks for atomic_begin and mode_fixup() now that
they're optional. Drop sentinel in Makefile. Fix minor style
nits I noticed on another reread.
v3: Use the new bcm2835 clk driver to manage pixel/HSM clocks instead
of having a fixed video mode. Use exynos-style component driver
matching instead of devicetree nodes to list the component driver
instances. Rename compatibility strings to say bcm2835, and
distinguish pv0/1/2. Clean up some h/vsync code, and add in
interlaced mode setup. Fix up probe/bind error paths. Use
bitops.h macros for vc4_regs.h
v4: Include i2c.h, allow building under COMPILE_TEST, drop msleep now
that other bugs have been fixed, add timeouts to cpu_relax()
loops, rename hpd-gpio to hpd-gpios.
Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
new file mode 100644
index 0000000..3c3ccff
--- /dev/null
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -0,0 +1,284 @@
+/*
+ * Copyright (C) 2014-2015 Broadcom
+ * Copyright (C) 2013 Red Hat
+ *
+ * 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/component.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+#include "vc4_drv.h"
+#include "vc4_regs.h"
+
+#define DRIVER_NAME "vc4"
+#define DRIVER_DESC "Broadcom VC4 graphics"
+#define DRIVER_DATE "20140616"
+#define DRIVER_MAJOR 0
+#define DRIVER_MINOR 0
+#define DRIVER_PATCHLEVEL 0
+
+/* Helper function for mapping the regs on a platform device. */
+void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
+{
+ struct resource *res;
+ void __iomem *map;
+
+ res = platform_get_resource(dev, IORESOURCE_MEM, index);
+ map = devm_ioremap_resource(&dev->dev, res);
+ if (IS_ERR(map)) {
+ DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
+ return map;
+ }
+
+ return map;
+}
+
+static void vc4_drm_preclose(struct drm_device *dev, struct drm_file *file)
+{
+ struct drm_crtc *crtc;
+
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
+ vc4_cancel_page_flip(crtc, file);
+}
+
+static const struct file_operations vc4_drm_fops = {
+ .owner = THIS_MODULE,
+ .open = drm_open,
+ .release = drm_release,
+ .unlocked_ioctl = drm_ioctl,
+ .mmap = drm_gem_cma_mmap,
+ .poll = drm_poll,
+ .read = drm_read,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = drm_compat_ioctl,
+#endif
+ .llseek = noop_llseek,
+};
+
+static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
+};
+
+static struct drm_driver vc4_drm_driver = {
+ .driver_features = (DRIVER_MODESET |
+ DRIVER_ATOMIC |
+ DRIVER_GEM |
+ DRIVER_PRIME),
+ .preclose = vc4_drm_preclose,
+
+ .enable_vblank = vc4_enable_vblank,
+ .disable_vblank = vc4_disable_vblank,
+ .get_vblank_counter = drm_vblank_count,
+
+#if defined(CONFIG_DEBUG_FS)
+ .debugfs_init = vc4_debugfs_init,
+ .debugfs_cleanup = vc4_debugfs_cleanup,
+#endif
+
+ .gem_free_object = drm_gem_cma_free_object,
+ .gem_vm_ops = &drm_gem_cma_vm_ops,
+
+ .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
+ .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
+ .gem_prime_import = drm_gem_prime_import,
+ .gem_prime_export = drm_gem_prime_export,
+ .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
+ .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
+ .gem_prime_vmap = drm_gem_cma_prime_vmap,
+ .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
+ .gem_prime_mmap = drm_gem_cma_prime_mmap,
+
+ .dumb_create = vc4_dumb_create,
+ .dumb_map_offset = drm_gem_cma_dumb_map_offset,
+ .dumb_destroy = drm_gem_dumb_destroy,
+
+ .ioctls = vc4_drm_ioctls,
+ .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
+ .fops = &vc4_drm_fops,
+
+ .name = DRIVER_NAME,
+ .desc = DRIVER_DESC,
+ .date = DRIVER_DATE,
+ .major = DRIVER_MAJOR,
+ .minor = DRIVER_MINOR,
+ .patchlevel = DRIVER_PATCHLEVEL,
+};
+
+static int compare_dev(struct device *dev, void *data)
+{
+ return dev == data;
+}
+
+static void vc4_match_add_drivers(struct device *dev,
+ struct component_match **match,
+ struct platform_driver *const *drivers,
+ int count)
+{
+ int i;
+
+ for (i = 0; i < count; i++) {
+ struct device_driver *drv = &drivers[i]->driver;
+ struct device *p = NULL, *d;
+
+ while ((d = bus_find_device(&platform_bus_type, p, drv,
+ (void *)platform_bus_type.match))) {
+ put_device(p);
+ component_match_add(dev, match, compare_dev, d);
+ p = d;
+ }
+ put_device(p);
+ }
+}
+
+static int vc4_drm_bind(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct drm_device *drm;
+ struct drm_connector *connector;
+ struct vc4_dev *vc4;
+ int ret = 0;
+
+ dev->coherent_dma_mask = DMA_BIT_MASK(32);
+
+ vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
+ if (!vc4)
+ return -ENOMEM;
+
+ drm = drm_dev_alloc(&vc4_drm_driver, dev);
+ if (!drm)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, drm);
+ vc4->dev = drm;
+ drm->dev_private = vc4;
+
+ drm_dev_set_unique(drm, dev_name(dev));
+
+ drm_mode_config_init(drm);
+ if (ret)
+ goto unref;
+
+ ret = component_bind_all(dev, drm);
+ if (ret)
+ goto unref;
+
+ ret = drm_dev_register(drm, 0);
+ if (ret < 0)
+ goto unbind_all;
+
+ /* Connector registration has to occur after DRM device
+ * registration, because it creates sysfs entries based on the
+ * DRM device.
+ */
+ list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
+ ret = drm_connector_register(connector);
+ if (ret)
+ goto unregister;
+ }
+
+ vc4_kms_load(drm);
+
+ return 0;
+
+unregister:
+ drm_dev_unregister(drm);
+unbind_all:
+ component_unbind_all(dev, drm);
+unref:
+ drm_dev_unref(drm);
+ return ret;
+}
+
+static void vc4_drm_unbind(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct drm_device *drm = platform_get_drvdata(pdev);
+
+ drm_mode_config_cleanup(drm);
+
+ drm_put_dev(drm);
+}
+
+static const struct component_master_ops vc4_drm_ops = {
+ .bind = vc4_drm_bind,
+ .unbind = vc4_drm_unbind,
+};
+
+static struct platform_driver *const component_drivers[] = {
+ &vc4_hdmi_driver,
+ &vc4_crtc_driver,
+ &vc4_hvs_driver,
+};
+
+static int vc4_platform_drm_probe(struct platform_device *pdev)
+{
+ struct component_match *match = NULL;
+ struct device *dev = &pdev->dev;
+
+ vc4_match_add_drivers(dev, &match,
+ component_drivers, ARRAY_SIZE(component_drivers));
+
+ return component_master_add_with_match(dev, &vc4_drm_ops, match);
+}
+
+static int vc4_platform_drm_remove(struct platform_device *pdev)
+{
+ component_master_del(&pdev->dev, &vc4_drm_ops);
+
+ return 0;
+}
+
+static const struct of_device_id vc4_of_match[] = {
+ { .compatible = "brcm,bcm2835-vc4", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, vc4_of_match);
+
+static struct platform_driver vc4_platform_driver = {
+ .probe = vc4_platform_drm_probe,
+ .remove = vc4_platform_drm_remove,
+ .driver = {
+ .name = "vc4-drm",
+ .owner = THIS_MODULE,
+ .of_match_table = vc4_of_match,
+ },
+};
+
+static int __init vc4_drm_register(void)
+{
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
+ ret = platform_driver_register(component_drivers[i]);
+ if (ret) {
+ while (--i >= 0)
+ platform_driver_unregister(component_drivers[i]);
+ return ret;
+ }
+ }
+ return platform_driver_register(&vc4_platform_driver);
+}
+
+static void __exit vc4_drm_unregister(void)
+{
+ int i;
+
+ for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
+ platform_driver_unregister(component_drivers[i]);
+
+ platform_driver_unregister(&vc4_platform_driver);
+}
+
+module_init(vc4_drm_register);
+module_exit(vc4_drm_unregister);
+
+MODULE_ALIAS("platform:vc4-drm");
+MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
+MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
+MODULE_LICENSE("GPL v2");