Select Git revision
i915_irq.c 124.49 KiB
/* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
*/
/*
* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/circ_buf.h>
#include <linux/cpuidle.h>
#include <linux/slab.h>
#include <linux/sysrq.h>
#include <drm/drm_drv.h>
#include <drm/drm_irq.h>
#include <drm/i915_drm.h>
#include "display/intel_display_types.h"
#include "display/intel_fifo_underrun.h"
#include "display/intel_hotplug.h"
#include "display/intel_lpe_audio.h"
#include "display/intel_psr.h"
#include "gt/intel_gt.h"
#include "gt/intel_gt_irq.h"
#include "gt/intel_gt_pm_irq.h"
#include "i915_drv.h"
#include "i915_irq.h"
#include "i915_trace.h"
#include "intel_pm.h"
/**
* DOC: interrupt handling
*
* These functions provide the basic support for enabling and disabling the
* interrupt handling support. There's a lot more functionality in i915_irq.c
* and related files, but that will be described in separate chapters.
*/
typedef bool (*long_pulse_detect_func)(enum hpd_pin pin, u32 val);
static const u32 hpd_ilk[HPD_NUM_PINS] = {
[HPD_PORT_A] = DE_DP_A_HOTPLUG,
};
static const u32 hpd_ivb[HPD_NUM_PINS] = {
[HPD_PORT_A] = DE_DP_A_HOTPLUG_IVB,