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The udl driver contains an implementation of GEM vmap and mmap operations that is identical to the common SHMEM helper; except that udl's code uses cached pages by default. Convert udl to regular SHMEM helper functions. There's no reason to have udl behave differently from all other SHMEM drivers. The udl driver uses the SHMEM helper to enable caching. v3: * rebased onto Daniel's shmem untangle series v2: * implement .gem_create_object with SHMEM helper Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200609090820.20256-3-tzimmermann@suse.de
135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2012 Red Hat
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*/
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#include <linux/module.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_file.h>
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#include <drm/drm_gem_shmem_helper.h>
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#include <drm/drm_managed.h>
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#include <drm/drm_ioctl.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_print.h>
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#include "udl_drv.h"
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static int udl_usb_suspend(struct usb_interface *interface,
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pm_message_t message)
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{
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struct drm_device *dev = usb_get_intfdata(interface);
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return drm_mode_config_helper_suspend(dev);
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}
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static int udl_usb_resume(struct usb_interface *interface)
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{
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struct drm_device *dev = usb_get_intfdata(interface);
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return drm_mode_config_helper_resume(dev);
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}
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DEFINE_DRM_GEM_FOPS(udl_driver_fops);
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static struct drm_driver driver = {
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.driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
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/* GEM hooks */
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.gem_create_object = drm_gem_shmem_create_object_cached,
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.fops = &udl_driver_fops,
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DRM_GEM_SHMEM_DRIVER_OPS,
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.name = DRIVER_NAME,
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.desc = DRIVER_DESC,
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.date = DRIVER_DATE,
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.major = DRIVER_MAJOR,
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.minor = DRIVER_MINOR,
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.patchlevel = DRIVER_PATCHLEVEL,
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};
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static struct udl_device *udl_driver_create(struct usb_interface *interface)
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{
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struct usb_device *udev = interface_to_usbdev(interface);
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struct udl_device *udl;
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int r;
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udl = devm_drm_dev_alloc(&interface->dev, &driver,
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struct udl_device, drm);
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if (IS_ERR(udl))
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return udl;
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udl->udev = udev;
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r = udl_init(udl);
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if (r)
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return ERR_PTR(r);
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usb_set_intfdata(interface, udl);
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return udl;
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}
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static int udl_usb_probe(struct usb_interface *interface,
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const struct usb_device_id *id)
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{
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int r;
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struct udl_device *udl;
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udl = udl_driver_create(interface);
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if (IS_ERR(udl))
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return PTR_ERR(udl);
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r = drm_dev_register(&udl->drm, 0);
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if (r)
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return r;
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DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
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drm_fbdev_generic_setup(&udl->drm, 0);
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return 0;
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}
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static void udl_usb_disconnect(struct usb_interface *interface)
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{
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struct drm_device *dev = usb_get_intfdata(interface);
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drm_kms_helper_poll_fini(dev);
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udl_drop_usb(dev);
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drm_dev_unplug(dev);
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}
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/*
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* There are many DisplayLink-based graphics products, all with unique PIDs.
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* So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
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* We also require a match on SubClass (0x00) and Protocol (0x00),
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* which is compatible with all known USB 2.0 era graphics chips and firmware,
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* but allows DisplayLink to increment those for any future incompatible chips
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*/
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static const struct usb_device_id id_table[] = {
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{.idVendor = 0x17e9, .bInterfaceClass = 0xff,
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.bInterfaceSubClass = 0x00,
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.bInterfaceProtocol = 0x00,
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.match_flags = USB_DEVICE_ID_MATCH_VENDOR |
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USB_DEVICE_ID_MATCH_INT_CLASS |
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USB_DEVICE_ID_MATCH_INT_SUBCLASS |
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USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
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{},
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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static struct usb_driver udl_driver = {
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.name = "udl",
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.probe = udl_usb_probe,
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.disconnect = udl_usb_disconnect,
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.suspend = udl_usb_suspend,
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.resume = udl_usb_resume,
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.id_table = id_table,
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};
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module_usb_driver(udl_driver);
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MODULE_LICENSE("GPL");
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