forked from Minki/linux
a325725633
We already have a fallback in place to fill out the unique from dev->unique, which is set to something reasonable in drm_dev_alloc. Which means we only need to have a special set_busid for pci devices, to be able to care the backwards compat code for drm 1.1 around, which libdrm still needs. While developing and testing this patch things blew up in really interesting ways, and the code is rather confusing in naming things between the kernel code, ioctl #defines and libdrm. For the next brave dragon slayer, document all this madness properly in the userspace interface section of gpu.tmpl. v2: Make drm_dev_set_unique static and update kerneldoc. v3: Entire rewrite, plus document what's going on for posterity in the gpu docbook uapi section. v4: Drop accidental amdgpu hunk (Emil). v5: Drop accidental omapdrm vblank counter change (Emil). v6: Rebase on top of the sphinx conversion. Cc: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Cc: Emil Velikov <emil.l.velikov@gmail.com> Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> (virt_gpu) Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
335 lines
8.1 KiB
C
335 lines
8.1 KiB
C
/*
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* Hisilicon Kirin SoCs drm master driver
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*
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* Copyright (c) 2016 Linaro Limited.
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* Copyright (c) 2014-2016 Hisilicon Limited.
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*
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* Author:
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* Xinliang Liu <z.liuxinliang@hisilicon.com>
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* Xinliang Liu <xinliang.liu@linaro.org>
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* Xinwei Kong <kong.kongxinwei@hisilicon.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/of_platform.h>
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#include <linux/component.h>
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#include <linux/of_graph.h>
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#include <drm/drmP.h>
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#include <drm/drm_gem_cma_helper.h>
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#include <drm/drm_fb_cma_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include "kirin_drm_drv.h"
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static struct kirin_dc_ops *dc_ops;
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static int kirin_drm_kms_cleanup(struct drm_device *dev)
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{
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struct kirin_drm_private *priv = dev->dev_private;
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#ifdef CONFIG_DRM_FBDEV_EMULATION
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if (priv->fbdev) {
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drm_fbdev_cma_fini(priv->fbdev);
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priv->fbdev = NULL;
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}
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#endif
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drm_kms_helper_poll_fini(dev);
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drm_vblank_cleanup(dev);
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dc_ops->cleanup(dev);
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drm_mode_config_cleanup(dev);
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devm_kfree(dev->dev, priv);
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dev->dev_private = NULL;
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return 0;
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}
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#ifdef CONFIG_DRM_FBDEV_EMULATION
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static void kirin_fbdev_output_poll_changed(struct drm_device *dev)
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{
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struct kirin_drm_private *priv = dev->dev_private;
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if (priv->fbdev) {
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drm_fbdev_cma_hotplug_event(priv->fbdev);
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} else {
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priv->fbdev = drm_fbdev_cma_init(dev, 32,
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dev->mode_config.num_crtc,
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dev->mode_config.num_connector);
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if (IS_ERR(priv->fbdev))
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priv->fbdev = NULL;
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}
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}
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#endif
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static const struct drm_mode_config_funcs kirin_drm_mode_config_funcs = {
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.fb_create = drm_fb_cma_create,
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#ifdef CONFIG_DRM_FBDEV_EMULATION
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.output_poll_changed = kirin_fbdev_output_poll_changed,
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#endif
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.atomic_check = drm_atomic_helper_check,
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.atomic_commit = drm_atomic_helper_commit,
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};
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static void kirin_drm_mode_config_init(struct drm_device *dev)
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{
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dev->mode_config.min_width = 0;
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dev->mode_config.min_height = 0;
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dev->mode_config.max_width = 2048;
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dev->mode_config.max_height = 2048;
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dev->mode_config.funcs = &kirin_drm_mode_config_funcs;
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}
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static int kirin_drm_kms_init(struct drm_device *dev)
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{
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struct kirin_drm_private *priv;
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int ret;
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priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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dev->dev_private = priv;
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dev_set_drvdata(dev->dev, dev);
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/* dev->mode_config initialization */
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drm_mode_config_init(dev);
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kirin_drm_mode_config_init(dev);
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/* display controller init */
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ret = dc_ops->init(dev);
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if (ret)
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goto err_mode_config_cleanup;
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/* bind and init sub drivers */
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ret = component_bind_all(dev->dev, dev);
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if (ret) {
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DRM_ERROR("failed to bind all component.\n");
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goto err_dc_cleanup;
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}
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/* vblank init */
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ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
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if (ret) {
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DRM_ERROR("failed to initialize vblank.\n");
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goto err_unbind_all;
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}
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/* with irq_enabled = true, we can use the vblank feature. */
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dev->irq_enabled = true;
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/* reset all the states of crtc/plane/encoder/connector */
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drm_mode_config_reset(dev);
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/* init kms poll for handling hpd */
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drm_kms_helper_poll_init(dev);
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/* force detection after connectors init */
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(void)drm_helper_hpd_irq_event(dev);
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return 0;
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err_unbind_all:
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component_unbind_all(dev->dev, dev);
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err_dc_cleanup:
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dc_ops->cleanup(dev);
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err_mode_config_cleanup:
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drm_mode_config_cleanup(dev);
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devm_kfree(dev->dev, priv);
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dev->dev_private = NULL;
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return ret;
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}
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static const struct file_operations kirin_drm_fops = {
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.owner = THIS_MODULE,
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.open = drm_open,
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.release = drm_release,
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.unlocked_ioctl = drm_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = drm_compat_ioctl,
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#endif
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.poll = drm_poll,
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.read = drm_read,
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.llseek = no_llseek,
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.mmap = drm_gem_cma_mmap,
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};
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static int kirin_gem_cma_dumb_create(struct drm_file *file,
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struct drm_device *dev,
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struct drm_mode_create_dumb *args)
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{
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return drm_gem_cma_dumb_create_internal(file, dev, args);
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}
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static struct drm_driver kirin_drm_driver = {
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.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
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DRIVER_ATOMIC | DRIVER_HAVE_IRQ,
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.fops = &kirin_drm_fops,
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.gem_free_object_unlocked = drm_gem_cma_free_object,
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.gem_vm_ops = &drm_gem_cma_vm_ops,
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.dumb_create = kirin_gem_cma_dumb_create,
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.dumb_map_offset = drm_gem_cma_dumb_map_offset,
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.dumb_destroy = drm_gem_dumb_destroy,
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.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
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.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
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.gem_prime_export = drm_gem_prime_export,
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.gem_prime_import = drm_gem_prime_import,
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.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
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.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
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.gem_prime_vmap = drm_gem_cma_prime_vmap,
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.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
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.gem_prime_mmap = drm_gem_cma_prime_mmap,
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.name = "kirin",
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.desc = "Hisilicon Kirin SoCs' DRM Driver",
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.date = "20150718",
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.major = 1,
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.minor = 0,
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};
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static int compare_of(struct device *dev, void *data)
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{
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return dev->of_node == data;
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}
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static int kirin_drm_bind(struct device *dev)
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{
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struct drm_driver *driver = &kirin_drm_driver;
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struct drm_device *drm_dev;
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int ret;
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drm_dev = drm_dev_alloc(driver, dev);
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if (!drm_dev)
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return -ENOMEM;
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drm_dev->platformdev = to_platform_device(dev);
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ret = kirin_drm_kms_init(drm_dev);
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if (ret)
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goto err_drm_dev_unref;
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ret = drm_dev_register(drm_dev, 0);
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if (ret)
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goto err_kms_cleanup;
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DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
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driver->name, driver->major, driver->minor, driver->patchlevel,
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driver->date, drm_dev->primary->index);
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return 0;
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err_kms_cleanup:
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kirin_drm_kms_cleanup(drm_dev);
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err_drm_dev_unref:
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drm_dev_unref(drm_dev);
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return ret;
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}
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static void kirin_drm_unbind(struct device *dev)
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{
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struct drm_device *drm_dev = dev_get_drvdata(dev);
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drm_dev_unregister(drm_dev);
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kirin_drm_kms_cleanup(drm_dev);
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drm_dev_unref(drm_dev);
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}
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static const struct component_master_ops kirin_drm_ops = {
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.bind = kirin_drm_bind,
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.unbind = kirin_drm_unbind,
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};
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static struct device_node *kirin_get_remote_node(struct device_node *np)
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{
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struct device_node *endpoint, *remote;
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/* get the first endpoint, in our case only one remote node
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* is connected to display controller.
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*/
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endpoint = of_graph_get_next_endpoint(np, NULL);
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if (!endpoint) {
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DRM_ERROR("no valid endpoint node\n");
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return ERR_PTR(-ENODEV);
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}
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of_node_put(endpoint);
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remote = of_graph_get_remote_port_parent(endpoint);
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if (!remote) {
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DRM_ERROR("no valid remote node\n");
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return ERR_PTR(-ENODEV);
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}
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of_node_put(remote);
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if (!of_device_is_available(remote)) {
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DRM_ERROR("not available for remote node\n");
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return ERR_PTR(-ENODEV);
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}
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return remote;
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}
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static int kirin_drm_platform_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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struct component_match *match = NULL;
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struct device_node *remote;
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dc_ops = (struct kirin_dc_ops *)of_device_get_match_data(dev);
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if (!dc_ops) {
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DRM_ERROR("failed to get dt id data\n");
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return -EINVAL;
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}
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remote = kirin_get_remote_node(np);
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if (IS_ERR(remote))
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return PTR_ERR(remote);
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component_match_add(dev, &match, compare_of, remote);
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return component_master_add_with_match(dev, &kirin_drm_ops, match);
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return 0;
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}
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static int kirin_drm_platform_remove(struct platform_device *pdev)
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{
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component_master_del(&pdev->dev, &kirin_drm_ops);
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dc_ops = NULL;
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return 0;
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}
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static const struct of_device_id kirin_drm_dt_ids[] = {
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{ .compatible = "hisilicon,hi6220-ade",
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.data = &ade_dc_ops,
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},
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{ /* end node */ },
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};
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MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
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static struct platform_driver kirin_drm_platform_driver = {
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.probe = kirin_drm_platform_probe,
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.remove = kirin_drm_platform_remove,
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.driver = {
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.name = "kirin-drm",
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.of_match_table = kirin_drm_dt_ids,
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},
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};
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module_platform_driver(kirin_drm_platform_driver);
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MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
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MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
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MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
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MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver");
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MODULE_LICENSE("GPL v2");
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