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>
92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
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* Derived from drm_pci.c
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*
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* Copyright 2003 José Fonseca.
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* Copyright 2003 Leif Delgass.
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* Copyright (c) 2009, Code Aurora Forum.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/export.h>
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#include <drm/drmP.h>
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/*
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* Register.
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*
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* \param platdev - Platform device struture
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* \return zero on success or a negative number on failure.
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*
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* Attempt to gets inter module "drm" information. If we are first
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* then register the character device and inter module information.
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* Try and register, if we fail to register, backout previous work.
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*/
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static int drm_get_platform_dev(struct platform_device *platdev,
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struct drm_driver *driver)
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{
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struct drm_device *dev;
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int ret;
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DRM_DEBUG("\n");
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dev = drm_dev_alloc(driver, &platdev->dev);
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if (!dev)
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return -ENOMEM;
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dev->platformdev = platdev;
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ret = drm_dev_register(dev, 0);
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if (ret)
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goto err_free;
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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, dev->primary->index);
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return 0;
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err_free:
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drm_dev_unref(dev);
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return ret;
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}
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/**
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* drm_platform_init - Register a platform device with the DRM subsystem
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* @driver: DRM device driver
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* @platform_device: platform device to register
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*
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* Registers the specified DRM device driver and platform device with the DRM
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* subsystem, initializing a drm_device structure and calling the driver's
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* .load() function.
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*
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* NOTE: This function is deprecated, please use drm_dev_alloc() and
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* drm_dev_register() instead and remove your ->load() callback.
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*
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* Return: 0 on success or a negative error code on failure.
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*/
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int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device)
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{
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DRM_DEBUG("\n");
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return drm_get_platform_dev(platform_device, driver);
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}
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EXPORT_SYMBOL(drm_platform_init);
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