^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * drm_irq.c IRQ and vblank support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * \author Rickard E. (Rik) Faith <faith@valinux.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * \author Gareth Hughes <gareth@valinux.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Permission is hereby granted, free of charge, to any person obtaining a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * copy of this software and associated documentation files (the "Software"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * to deal in the Software without restriction, including without limitation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * the rights to use, copy, modify, merge, publish, distribute, sublicense,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * and/or sell copies of the Software, and to permit persons to whom the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Software is furnished to do so, subject to the following conditions:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * The above copyright notice and this permission notice (including the next
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * paragraph) shall be included in all copies or substantial portions of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Software.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * OTHER DEALINGS IN THE SOFTWARE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * Permission is hereby granted, free of charge, to any person obtaining a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * copy of this software and associated documentation files (the "Software"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * to deal in the Software without restriction, including without limitation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * the rights to use, copy, modify, merge, publish, distribute, sublicense,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * and/or sell copies of the Software, and to permit persons to whom the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * Software is furnished to do so, subject to the following conditions:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * The above copyright notice and this permission notice (including the next
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * paragraph) shall be included in all copies or substantial portions of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * Software.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * OTHER DEALINGS IN THE SOFTWARE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #include <linux/interrupt.h> /* For task queue support */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #include <linux/vgaarb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #include <drm/drm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #include <drm/drm_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #include <drm/drm_drv.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #include <drm/drm_irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #include <drm/drm_print.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #include <drm/drm_vblank.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #include "drm_internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * DOC: irq helpers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * The DRM core provides very simple support helpers to enable IRQ handling on a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * device through the drm_irq_install() and drm_irq_uninstall() functions. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * only supports devices with a single interrupt on the main device stored in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * &drm_device.dev and set as the device paramter in drm_dev_alloc().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * These IRQ helpers are strictly optional. Drivers which roll their own only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * need to set &drm_device.irq_enabled to signal the DRM core that vblank
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * interrupts are working. Since these helpers don't automatically clean up the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * requested interrupt like e.g. devm_request_irq() they're not really
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * recommended.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * drm_irq_install - install IRQ handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * @dev: DRM device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * @irq: IRQ number to install the handler for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * Initializes the IRQ related data. Installs the handler, calling the driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * &drm_driver.irq_preinstall and &drm_driver.irq_postinstall functions before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * and after the installation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * This is the simplified helper interface provided for drivers with no special
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * needs. Drivers which need to install interrupt handlers for multiple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * interrupts must instead set &drm_device.irq_enabled to signal the DRM core
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * that vblank interrupts are available.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * @irq must match the interrupt number that would be passed to request_irq(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * if called directly instead of using this helper function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * &drm_driver.irq_handler is called to handle the registered interrupt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * Returns:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * Zero on success or a negative error code on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) int drm_irq_install(struct drm_device *dev, int irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) unsigned long sh_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (irq == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (dev->irq_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) dev->irq_enabled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) DRM_DEBUG("irq=%d\n", irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /* Before installing handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (dev->driver->irq_preinstall)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) dev->driver->irq_preinstall(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /* PCI devices require shared interrupts. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (dev->pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) sh_flags = IRQF_SHARED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) ret = request_irq(irq, dev->driver->irq_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) sh_flags, dev->driver->name, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) dev->irq_enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) /* After installing handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (dev->driver->irq_postinstall)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) ret = dev->driver->irq_postinstall(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) dev->irq_enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) vga_client_register(dev->pdev, NULL, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) free_irq(irq, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) dev->irq = irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) EXPORT_SYMBOL(drm_irq_install);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * drm_irq_uninstall - uninstall the IRQ handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * @dev: DRM device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * Calls the driver's &drm_driver.irq_uninstall function and unregisters the IRQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * handler. This should only be called by drivers which used drm_irq_install()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * to set up their interrupt handler. Other drivers must only reset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * &drm_device.irq_enabled to false.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * Note that for kernel modesetting drivers it is a bug if this function fails.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * The sanity checks are only to catch buggy user modesetting drivers which call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) * the same function through an ioctl.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * Returns:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * Zero on success or a negative error code on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) int drm_irq_uninstall(struct drm_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) unsigned long irqflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) bool irq_enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) irq_enabled = dev->irq_enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) dev->irq_enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * Wake up any waiters so they don't hang. This is just to paper over
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * issues for UMS drivers which aren't in full control of their
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * vblank/irq handling. KMS drivers must ensure that vblanks are all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * disabled when uninstalling the irq handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (drm_dev_has_vblank(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) spin_lock_irqsave(&dev->vbl_lock, irqflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) for (i = 0; i < dev->num_crtcs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct drm_vblank_crtc *vblank = &dev->vblank[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (!vblank->enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) WARN_ON(drm_core_check_feature(dev, DRIVER_MODESET));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) drm_vblank_disable_and_save(dev, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) wake_up(&vblank->queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) if (!irq_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) DRM_DEBUG("irq=%d\n", dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) vga_client_register(dev->pdev, NULL, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (dev->driver->irq_uninstall)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) dev->driver->irq_uninstall(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) free_irq(dev->irq, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) EXPORT_SYMBOL(drm_irq_uninstall);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) #if IS_ENABLED(CONFIG_DRM_LEGACY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) int drm_legacy_irq_control(struct drm_device *dev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct drm_file *file_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) struct drm_control *ctl = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) int ret = 0, irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) /* if we haven't irq we fallback for compatibility reasons -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) * this used to be a separate function in drm_dma.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (!drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) /* UMS was only ever supported on pci devices. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (WARN_ON(!dev->pdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) switch (ctl->func) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) case DRM_INST_HANDLER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) irq = dev->pdev->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) if (dev->if_version < DRM_IF_VERSION(1, 2) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) ctl->irq != irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) mutex_lock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) ret = drm_irq_install(dev, irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) case DRM_UNINST_HANDLER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) mutex_lock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) ret = drm_irq_uninstall(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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