drivers/gpu/drm/i915/display/intel_display_irq.c

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2023 Intel Corporation
 */

#include "gt/intel_rps.h"
#include "i915_drv.h"
#include "i915_irq.h"
#include "i915_reg.h"
#include "icl_dsi_regs.h"
#include "intel_crtc.h"
#include "intel_de.h"
#include "intel_display_irq.h"
#include "intel_display_trace.h"
#include "intel_display_types.h"
#include "intel_dp_aux.h"
#include "intel_fdi_regs.h"
#include "intel_fifo_underrun.h"
#include "intel_gmbus.h"
#include "intel_hotplug_irq.h"
#include "intel_pmdemand.h"
#include "intel_psr.h"
#include "intel_psr_regs.h"

static void
intel_handle_vblank(struct drm_i915_private *dev_priv, enum pipe pipe)
{
	struct intel_crtc *crtc = intel_crtc_for_pipe(dev_priv, pipe);

	drm_crtc_handle_vblank(&crtc->base);
}

/**
 * ilk_update_display_irq - update DEIMR
 * @dev_priv: driver private
 * @interrupt_mask: mask of interrupt bits to update
 * @enabled_irq_mask: mask of interrupt bits to enable
 */
void ilk_update_display_irq(struct drm_i915_private *dev_priv,
			    u32 interrupt_mask, u32 enabled_irq_mask)
{
	u32 new_val;

	lockdep_assert_held(&dev_priv->irq_lock);
	drm_WARN_ON(&dev_priv->drm, enabled_irq_mask & ~interrupt_mask);

	new_val = dev_priv->irq_mask;
	new_val &= ~interrupt_mask;
	new_val |= (~enabled_irq_mask & interrupt_mask);

	if (new_val != dev_priv->irq_mask &&
	    !drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv))) {
		dev_priv->irq_mask = new_val;
		intel_uncore_write(&dev_priv->uncore, DEIMR, dev_priv->irq_mask);
		intel_uncore_posting_read(&dev_priv->uncore, DEIMR);
	}
}

void ilk_enable_display_irq(struct drm_i915_private *i915, u32 bits)
{
	ilk_update_display_irq(i915, bits, bits);
}

void ilk_disable_display_irq(struct drm_i915_private *i915, u32 bits)
{
	ilk_update_display_irq(i915, bits, 0);
}

/**
 * bdw_update_port_irq - update DE port interrupt
 * @dev_priv: driver private
 * @interrupt_mask: mask of interrupt bits to update
 * @enabled_irq_mask: mask of interrupt bits to enable
 */
void bdw_update_port_irq(struct drm_i915_private *dev_priv,
			 u32 interrupt_mask, u32 enabled_irq_mask)
{
	u32 new_val;
	u32 old_val;

	lockdep_assert_held(&dev_priv->irq_lock);

	drm_WARN_ON(&dev_priv->drm, enabled_irq_mask & ~interrupt_mask);

	if (drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv)))
		return;

	old_val = intel_uncore_read(&dev_priv->uncore, GEN8_DE_PORT_IMR);

	new_val = old_val;
	new_val &= ~interrupt_mask;
	new_val |= (~enabled_irq_mask & interrupt_mask);

	if (new_val != old_val) {
		intel_uncore_write(&dev_priv->uncore, GEN8_DE_PORT_IMR, new_val);
		intel_uncore_posting_read(&dev_priv->uncore, GEN8_DE_PORT_IMR);
	}
}

/**
 * bdw_update_pipe_irq - update DE pipe interrupt
 * @dev_priv: driver private
 * @pipe: pipe whose interrupt to update
 * @interrupt_mask: mask of interrupt bits to update
 * @enabled_irq_mask: mask of interrupt bits to enable
 */
static void bdw_update_pipe_irq(struct drm_i915_private *dev_priv,
				enum pipe pipe, u32 interrupt_mask,
				u32 enabled_irq_mask)
{
	u32 new_val;

	lockdep_assert_held(&dev_priv->irq_lock);

	drm_WARN_ON(&dev_priv->drm, enabled_irq_mask & ~interrupt_mask);

	if (drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv)))
		return;

	new_val = dev_priv->de_irq_mask[pipe];
	new_val &= ~interrupt_mask;
	new_val |= (~enabled_irq_mask & interrupt_mask);

	if (new_val != dev_priv->de_irq_mask[pipe]) {
		dev_priv->de_irq_mask[pipe] = new_val;
		intel_uncore_write(&dev_priv->uncore, GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
		intel_uncore_posting_read(&dev_priv->uncore, GEN8_DE_PIPE_IMR(pipe));
	}
}

void bdw_enable_pipe_irq(struct drm_i915_private *i915,
			 enum pipe pipe, u32 bits)
{
	bdw_update_pipe_irq(i915, pipe, bits, bits);
}

void bdw_disable_pipe_irq(struct drm_i915_private *i915,
			  enum pipe pipe, u32 bits)
{
	bdw_update_pipe_irq(i915, pipe, bits, 0);
}

/**
 * ibx_display_interrupt_update - update SDEIMR
 * @dev_priv: driver private
 * @interrupt_mask: mask of interrupt bits to update
 * @enabled_irq_mask: mask of interrupt bits to enable
 */
void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
				  u32 interrupt_mask,
				  u32 enabled_irq_mask)
{
	u32 sdeimr = intel_uncore_read(&dev_priv->uncore, SDEIMR);

	sdeimr &= ~interrupt_mask;
	sdeimr |= (~enabled_irq_mask & interrupt_mask);

	drm_WARN_ON(&dev_priv->drm, enabled_irq_mask & ~interrupt_mask);

	lockdep_assert_held(&dev_priv->irq_lock);

	if (drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv)))
		return;

	intel_uncore_write(&dev_priv->uncore, SDEIMR, sdeimr);
	intel_uncore_posting_read(&dev_priv->uncore, SDEIMR);
}

void ibx_enable_display_interrupt(struct drm_i915_private *i915, u32 bits)
{
	ibx_display_interrupt_update(i915, bits, bits);
}

void ibx_disable_display_interrupt(struct drm_i915_private *i915, u32 bits)
{
	ibx_display_interrupt_update(i915, bits, 0);
}

u32 i915_pipestat_enable_mask(struct drm_i915_private *dev_priv,
			      enum pipe pipe)
{
	u32 status_mask = dev_priv->pipestat_irq_mask[pipe];
	u32 enable_mask = status_mask << 16;

	lockdep_assert_held(&dev_priv->irq_lock);

	if (DISPLAY_VER(dev_priv) < 5)
		goto out;

	/*
	 * On pipe A we don't support the PSR interrupt yet,
	 * on pipe B and C the same bit MBZ.
	 */
	if (drm_WARN_ON_ONCE(&dev_priv->drm,
			     status_mask & PIPE_A_PSR_STATUS_VLV))
		return 0;
	/*
	 * On pipe B and C we don't support the PSR interrupt yet, on pipe
	 * A the same bit is for perf counters which we don't use either.
	 */
	if (drm_WARN_ON_ONCE(&dev_priv->drm,
			     status_mask & PIPE_B_PSR_STATUS_VLV))
		return 0;

	enable_mask &= ~(PIPE_FIFO_UNDERRUN_STATUS |
			 SPRITE0_FLIP_DONE_INT_EN_VLV |
			 SPRITE1_FLIP_DONE_INT_EN_VLV);
	if (status_mask & SPRITE0_FLIP_DONE_INT_STATUS_VLV)
		enable_mask |= SPRITE0_FLIP_DONE_INT_EN_VLV;
	if (status_mask & SPRITE1_FLIP_DONE_INT_STATUS_VLV)
		enable_mask |= SPRITE1_FLIP_DONE_INT_EN_VLV;

out:
	drm_WARN_ONCE(&dev_priv->drm,
		      enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
		      status_mask & ~PIPESTAT_INT_STATUS_MASK,
		      "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
		      pipe_name(pipe), enable_mask, status_mask);

	return enable_mask;
}

void i915_enable_pipestat(struct drm_i915_private *dev_priv,
			  enum pipe pipe, u32 status_mask)
{
	i915_reg_t reg = PIPESTAT(pipe);
	u32 enable_mask;

	drm_WARN_ONCE(&dev_priv->drm, status_mask & ~PIPESTAT_INT_STATUS_MASK,
		      "pipe %c: status_mask=0x%x\n",
		      pipe_name(pipe), status_mask);

	lockdep_assert_held(&dev_priv->irq_lock);
	drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv));

	if ((dev_priv->pipestat_irq_mask[pipe] & status_mask) == status_mask)
		return;

	dev_priv->pipestat_irq_mask[pipe] |= status_mask;
	enable_mask = i915_pipestat_enable_mask(dev_priv, pipe);

	intel_uncore_write(&dev_priv->uncore, reg, enable_mask | status_mask);
	intel_uncore_posting_read(&dev_priv->uncore, reg);
}

void i915_disable_pipestat(struct drm_i915_private *dev_priv,
			   enum pipe pipe, u32 status_mask)
{
	i915_reg_t reg = PIPESTAT(pipe);
	u32 enable_mask;

	drm_WARN_ONCE(&dev_priv->drm, status_mask & ~PIPESTAT_INT_STATUS_MASK,
		      "pipe %c: status_mask=0x%x\n",
		      pipe_name(pipe), status_mask);

	lockdep_assert_held(&dev_priv->irq_lock);
	drm_WARN_ON(&dev_priv->drm, !intel_irqs_enabled(dev_priv));

	if ((dev_priv->pipestat_irq_mask[pipe] & status_mask) == 0)
		return;

	dev_priv->pipestat_irq_mask[pipe] &= ~status_mask;
	enable_mask = i915_pipestat_enable_mask(dev_priv, pipe);

	intel_uncore_write(&dev_priv->uncore, reg, enable_mask | status_mask);
	intel_uncore_posting_read(&dev_priv->uncore, reg);
}

static bool i915_has_asle(struct drm_i915_private *i915)
{
	if (!IS_PINEVIEW(i915) && !IS_MOBILE(i915))
		return false;

	return intel_opregion_asle_present(i915);
}

/**
 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
 * @dev_priv: i915 device private
 */
void i915_enable_asle_pipestat(struct drm_i915_private *dev_priv)
{
	if (!i915_has_asle(dev_priv))
		return;

	spin_lock_irq(&dev_priv->irq_lock);

	i915_enable_pipestat(dev_priv, PIPE_B, PIPE_LEGACY_BLC_EVENT_STATUS);
	if (DISPLAY_VER(dev_priv) >= 4)
		i915_enable_pipestat(dev_priv, PIPE_A,
				     PIPE_LEGACY_BLC_EVENT_STATUS);

	spin_unlock_irq(&dev_priv->irq_lock);
}

#if defined(CONFIG_DEBUG_FS)
static void display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
					 enum pipe pipe,
					 u32 crc0, u32 crc1,
					 u32 crc2, u32 crc3,
					 u32 crc4)
{
	struct intel_crtc *crtc = intel_crtc_for_pipe(dev_priv, pipe);
	struct intel_pipe_crc *pipe_crc = &crtc->pipe_crc;
	u32 crcs[5] = { crc0, crc1, crc2, crc3, crc4 };

	trace_intel_pipe_crc(crtc, crcs);

	spin_lock(&pipe_crc->lock);
	/*
	 * For some not yet identified reason, the first CRC is
	 * bonkers. So let's just wait for the next vblank and read
	 * out the buggy result.
	 *
	 * On GEN8+ sometimes the second CRC is bonkers as well, so
	 * don't trust that one either.
	 */
	if (pipe_crc->skipped <= 0 ||
	    (DISPLAY_VER(dev_priv) >= 8 && pipe_crc->skipped == 1)) {
		pipe_crc->skipped++;
		spin_unlock(&pipe_crc->lock);
		return;
	}
	spin_unlock(&pipe_crc->lock);

	drm_crtc_add_crc_entry(&crtc->base, true,
			       drm_crtc_accurate_vblank_count(&crtc->base),
			       crcs);
}
#else
static inline void
display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
			     enum pipe pipe,
			     u32 crc0, u32 crc1,
			     u32 crc2, u32 crc3,
			     u32 crc4) {}
#endif

static void flip_done_handler(struct drm_i915_private *i915,
			      enum pipe pipe)
{
	struct intel_crtc *crtc = intel_crtc_for_pipe(i915, pipe);

	spin_lock(&i915->drm.event_lock);

	if (crtc->flip_done_event) {
		drm_crtc_send_vblank_event(&crtc->base, crtc->flip_done_event);
		crtc->flip_done_event = NULL;
	}

	spin_unlock(&i915->drm.event_lock);
}

static void hsw_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
				     enum pipe pipe)
{
	display_pipe_crc_irq_handler(dev_priv, pipe,
				     intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_1_IVB(pipe)),
				     0, 0, 0, 0);
}

static void ivb_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
				     enum pipe pipe)
{
	display_pipe_crc_irq_handler(dev_priv, pipe,
				     intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_1_IVB(pipe)),
				     intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_2_IVB(pipe)),
				     intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_3_IVB(pipe)),
				     intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_4_IVB(pipe)),
				     intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_5_IVB(pipe)));
}

static void i9xx_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
				      enum pipe pipe)
{
	u32 res1, res2;

	if (DISPLAY_VER(dev_priv) >= 3)
		res1 = intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_RES1_I915(pipe));
	else
		res1 = 0;

	if (DISPLAY_VER(dev_priv) >= 5 || IS_G4X(dev_priv))
		res2 = intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_RES2_G4X(pipe));
	else
		res2 = 0;

	display_pipe_crc_irq_handler(dev_priv, pipe,
				     intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_RED(pipe)),
				     intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_GREEN(pipe)),
				     intel_uncore_read(&dev_priv->uncore, PIPE_CRC_RES_BLUE(pipe)),
				     res1, res2);
}

void i9xx_pipestat_irq_reset(struct drm_i915_private *dev_priv)
{
	enum pipe pipe;

	for_each_pipe(dev_priv, pipe) {
		intel_uncore_write(&dev_priv->uncore, PIPESTAT(pipe),
				   PIPESTAT_INT_STATUS_MASK |
				   PIPE_FIFO_UNDERRUN_STATUS);

		dev_priv->pipestat_irq_mask[pipe] = 0;
	}
}

void i9xx_pipestat_irq_ack(struct drm_i915_private *dev_priv,
			   u32 iir, u32 pipe_stats[I915_MAX_PIPES])
{
	enum pipe pipe;

	spin_lock(&dev_priv->irq_lock);

	if (!dev_priv->display_irqs_enabled) {
		spin_unlock(&dev_priv->irq_lock);
		return;
	}

	for_each_pipe(dev_priv, pipe) {
		i915_reg_t reg;
		u32 status_mask, enable_mask, iir_bit = 0;

		/*
		 * PIPESTAT bits get signalled even when the interrupt is
		 * disabled with the mask bits, and some of the status bits do
		 * not generate interrupts at all (like the underrun bit). Hence
		 * we need to be careful that we only handle what we want to
		 * handle.
		 */

		/* fifo underruns are filterered in the underrun handler. */
		status_mask = PIPE_FIFO_UNDERRUN_STATUS;

		switch (pipe) {
		default:
		case PIPE_A:
			iir_bit = I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
			break;
		case PIPE_B:
			iir_bit = I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
			break;
		case PIPE_C:
			iir_bit = I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
			break;
		}
		if (iir & iir_bit)
			status_mask |= dev_priv->pipestat_irq_mask[pipe];

		if (!status_mask)
			continue;

		reg = PIPESTAT(pipe);
		pipe_stats[pipe] = intel_uncore_read(&dev_priv->uncore, reg) & status_mask;
		enable_mask = i915_pipestat_enable_mask(dev_priv, pipe);

		/*
		 * Clear the PIPE*STAT regs before the IIR
		 *
		 * Toggle the enable bits to make sure we get an
		 * edge in the ISR pipe event bit if we don't clear
		 * all the enabled status bits. Otherwise the edge
		 * triggered IIR on i965/g4x wouldn't notice that
		 * an interrupt is still pending.
		 */
		if (pipe_stats[pipe]) {
			intel_uncore_write(&dev_priv->uncore, reg, pipe_stats[pipe]);
			intel_uncore_write(&dev_priv->uncore, reg, enable_mask);
		}
	}
	spin_unlock(&dev_priv->irq_lock);
}

void i8xx_pipestat_irq_handler(struct drm_i915_private *dev_priv,
			       u16 iir, u32 pipe_stats[I915_MAX_PIPES])
{
	enum pipe pipe;

	for_each_pipe(dev_priv, pipe) {
		if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
			intel_handle_vblank(dev_priv, pipe);

		if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
			i9xx_pipe_crc_irq_handler(dev_priv, pipe);

		if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
			intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
	}
}

void i915_pipestat_irq_handler(struct drm_i915_private *dev_priv,
			       u32 iir, u32 pipe_stats[I915_MAX_PIPES])
{
	bool blc_event = false;
	enum pipe pipe;

	for_each_pipe(dev_priv, pipe) {
		if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
			intel_handle_vblank(dev_priv, pipe);

		if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
			blc_event = true;

		if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
			i9xx_pipe_crc_irq_handler(dev_priv, pipe);

		if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
			intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
	}

	if (blc_event || (iir & I915_ASLE_INTERRUPT))
		intel_opregion_asle_intr(dev_priv);
}

void i965_pipestat_irq_handler(struct drm_i915_private *dev_priv,
			       u32 iir, u32 pipe_stats[I915_MAX_PIPES])
{
	bool blc_event = false;
	enum pipe pipe;

	for_each_pipe(dev_priv, pipe) {
		if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS)
			intel_handle_vblank(dev_priv, pipe);

		if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
			blc_event = true;

		if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
			i9xx_pipe_crc_irq_handler(dev_priv, pipe);

		if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
			intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
	}

	if (blc_event || (iir & I915_ASLE_INTERRUPT))
		intel_opregion_asle_intr(dev_priv);

	if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
		intel_gmbus_irq_handler(dev_priv);
}

void valleyview_pipestat_irq_handler(struct drm_i915_private *dev_priv,
				     u32 pipe_stats[I915_MAX_PIPES])
{
	enum pipe pipe;

	for_each_pipe(dev_priv, pipe) {
		if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS)
			intel_handle_vblank(dev_priv, pipe);

		if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV)
			flip_done_handler(dev_priv, pipe);

		if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
			i9xx_pipe_crc_irq_handler(dev_priv, pipe);

		if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
			intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
	}

	if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
		intel_gmbus_irq_handler(dev_priv);
}

static void ibx_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
{
	enum pipe pipe;
	u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;

	ibx_hpd_irq_handler(dev_priv, hotplug_trigger);

	if (pch_iir & SDE_AUDIO_POWER_MASK) {
		int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
			       SDE_AUDIO_POWER_SHIFT);
		drm_dbg(&dev_priv->drm, "PCH audio power change on port %d\n",
			port_name(port));
	}

	if (pch_iir & SDE_AUX_MASK)
		intel_dp_aux_irq_handler(dev_priv);

	if (pch_iir & SDE_GMBUS)
		intel_gmbus_irq_handler(dev_priv);

	if (pch_iir & SDE_AUDIO_HDCP_MASK)
		drm_dbg(&dev_priv->drm, "PCH HDCP audio interrupt\n");

	if (pch_iir & SDE_AUDIO_TRANS_MASK)
		drm_dbg(&dev_priv->drm, "PCH transcoder audio interrupt\n");

	if (pch_iir & SDE_POISON)
		drm_err(&dev_priv->drm, "PCH poison interrupt\n");

	if (pch_iir & SDE_FDI_MASK) {
		for_each_pipe(dev_priv, pipe)
			drm_dbg(&dev_priv->drm, "  pipe %c FDI IIR: 0x%08x\n",
				pipe_name(pipe),
				intel_uncore_read(&dev_priv->uncore, FDI_RX_IIR(pipe)));
	}

	if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
		drm_dbg(&dev_priv->drm, "PCH transcoder CRC done interrupt\n");

	if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
		drm_dbg(&dev_priv->drm,
			"PCH transcoder CRC error interrupt\n");

	if (pch_iir & SDE_TRANSA_FIFO_UNDER)
		intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_A);

	if (pch_iir & SDE_TRANSB_FIFO_UNDER)
		intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_B);
}

static void ivb_err_int_handler(struct drm_i915_private *dev_priv)
{
	u32 err_int = intel_uncore_read(&dev_priv->uncore, GEN7_ERR_INT);
	enum pipe pipe;

	if (err_int & ERR_INT_POISON)
		drm_err(&dev_priv->drm, "Poison interrupt\n");

	for_each_pipe(dev_priv, pipe) {
		if (err_int & ERR_INT_FIFO_UNDERRUN(pipe))
			intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);

		if (err_int & ERR_INT_PIPE_CRC_DONE(pipe)) {
			if (IS_IVYBRIDGE(dev_priv))
				ivb_pipe_crc_irq_handler(dev_priv, pipe);
			else
				hsw_pipe_crc_irq_handler(dev_priv, pipe);
		}
	}

	intel_uncore_write(&dev_priv->uncore, GEN7_ERR_INT, err_int);
}

static void cpt_serr_int_handler(struct drm_i915_private *dev_priv)
{
	u32 serr_int = intel_uncore_read(&dev_priv->uncore, SERR_INT);
	enum pipe pipe;

	if (serr_int & SERR_INT_POISON)
		drm_err(&dev_priv->drm, "PCH poison interrupt\n");

	for_each_pipe(dev_priv, pipe)
		if (serr_int & SERR_INT_TRANS_FIFO_UNDERRUN(pipe))
			intel_pch_fifo_underrun_irq_handler(dev_priv, pipe);

	intel_uncore_write(&dev_priv->uncore, SERR_INT, serr_int);
}

static void cpt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
{
	enum pipe pipe;
	u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;

	ibx_hpd_irq_handler(dev_priv, hotplug_trigger);

	if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
		int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
			       SDE_AUDIO_POWER_SHIFT_CPT);
		drm_dbg(&dev_priv->drm, "PCH audio power change on port %c\n",
			port_name(port));
	}

	if (pch_iir & SDE_AUX_MASK_CPT)
		intel_dp_aux_irq_handler(dev_priv);

	if (pch_iir & SDE_GMBUS_CPT)
		intel_gmbus_irq_handler(dev_priv);

	if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
		drm_dbg(&dev_priv->drm, "Audio CP request interrupt\n");

	if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
		drm_dbg(&dev_priv->drm, "Audio CP change interrupt\n");

	if (pch_iir & SDE_FDI_MASK_CPT) {
		for_each_pipe(dev_priv, pipe)
			drm_dbg(&dev_priv->drm, "  pipe %c FDI IIR: 0x%08x\n",
				pipe_name(pipe),
				intel_uncore_read(&dev_priv->uncore, FDI_RX_IIR(pipe)));
	}

	if (pch_iir & SDE_ERROR_CPT)
		cpt_serr_int_handler(dev_priv);
}

void ilk_display_irq_handler(struct drm_i915_private *dev_priv, u32 de_iir)
{
	enum pipe pipe;
	u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG;

	if (hotplug_trigger)
		ilk_hpd_irq_handler(dev_priv, hotplug_trigger);

	if (de_iir & DE_AUX_CHANNEL_A)
		intel_dp_aux_irq_handler(dev_priv);

	if (de_iir & DE_GSE)
		intel_opregion_asle_intr(dev_priv);

	if (de_iir & DE_POISON)
		drm_err(&dev_priv->drm, "Poison interrupt\n");

	for_each_pipe(dev_priv, pipe) {
		if (de_iir & DE_PIPE_VBLANK(pipe))
			intel_handle_vblank(dev_priv, pipe);

		if (de_iir & DE_PLANE_FLIP_DONE(pipe))
			flip_done_handler(dev_priv, pipe);

		if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe))
			intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);

		if (de_iir & DE_PIPE_CRC_DONE(pipe))
			i9xx_pipe_crc_irq_handler(dev_priv, pipe);
	}

	/* check event from PCH */
	if (de_iir & DE_PCH_EVENT) {
		u32 pch_iir = intel_uncore_read(&dev_priv->uncore, SDEIIR);

		if (HAS_PCH_CPT(dev_priv))
			cpt_irq_handler(dev_priv, pch_iir);
		else
			ibx_irq_handler(dev_priv, pch_iir);

		/* should clear PCH hotplug event before clear CPU irq */
		intel_uncore_write(&dev_priv->uncore, SDEIIR, pch_iir);
	}

	if (DISPLAY_VER(dev_priv) == 5 && de_iir & DE_PCU_EVENT)
		gen5_rps_irq_handler(&to_gt(dev_priv)->rps);
}

void ivb_display_irq_handler(struct drm_i915_private *dev_priv, u32 de_iir)
{
	enum pipe pipe;
	u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG_IVB;

	if (hotplug_trigger)
		ilk_hpd_irq_handler(dev_priv, hotplug_trigger);

	if (de_iir & DE_ERR_INT_IVB)
		ivb_err_int_handler(dev_priv);

	if (de_iir & DE_EDP_PSR_INT_HSW) {
		struct intel_encoder *encoder;

		for_each_intel_encoder_with_psr(&dev_priv->drm, encoder) {
			struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
			u32 psr_iir;

			psr_iir = intel_uncore_rmw(&dev_priv->uncore,
						   EDP_PSR_IIR, 0, 0);
			intel_psr_irq_handler(intel_dp, psr_iir);
			break;
		}
	}

	if (de_iir & DE_AUX_CHANNEL_A_IVB)
		intel_dp_aux_irq_handler(dev_priv);

	if (de_iir & DE_GSE_IVB)
		intel_opregion_asle_intr(dev_priv);

	for_each_pipe(dev_priv, pipe) {
		if (de_iir & DE_PIPE_VBLANK_IVB(pipe))
			intel_handle_vblank(dev_priv, pipe);

		if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe))
			flip_done_handler(dev_priv, pipe);
	}

	/* check event from PCH */
	if (!HAS_PCH_NOP(dev_priv) && (de_iir & DE_PCH_EVENT_IVB)) {
		u32 pch_iir = intel_uncore_read(&dev_priv->uncore, SDEIIR);

		cpt_irq_handler(dev_priv, pch_iir);

		/* clear PCH hotplug event before clear CPU irq */
		intel_uncore_write(&dev_priv->uncore, SDEIIR, pch_iir);
	}
}

static u32 gen8_de_port_aux_mask(struct drm_i915_private *dev_priv)
{
	u32 mask;

	if (DISPLAY_VER(dev_priv) >= 20)
		return 0;
	else if (DISPLAY_VER(dev_priv) >= 14)
		return TGL_DE_PORT_AUX_DDIA |
			TGL_DE_PORT_AUX_DDIB;
	else if (DISPLAY_VER(dev_priv) >= 13)
		return TGL_DE_PORT_AUX_DDIA |
			TGL_DE_PORT_AUX_DDIB |
			TGL_DE_PORT_AUX_DDIC |
			XELPD_DE_PORT_AUX_DDID |
			XELPD_DE_PORT_AUX_DDIE |
			TGL_DE_PORT_AUX_USBC1 |
			TGL_DE_PORT_AUX_USBC2 |
			TGL_DE_PORT_AUX_USBC3 |
			TGL_DE_PORT_AUX_USBC4;
	else if (DISPLAY_VER(dev_priv) >= 12)
		return TGL_DE_PORT_AUX_DDIA |
			TGL_DE_PORT_AUX_DDIB |
			TGL_DE_PORT_AUX_DDIC |
			TGL_DE_PORT_AUX_USBC1 |
			TGL_DE_PORT_AUX_USBC2 |
			TGL_DE_PORT_AUX_USBC3 |
			TGL_DE_PORT_AUX_USBC4 |
			TGL_DE_PORT_AUX_USBC5 |
			TGL_DE_PORT_AUX_USBC6;

	mask = GEN8_AUX_CHANNEL_A;
	if (DISPLAY_VER(dev_priv) >= 9)
		mask |= GEN9_AUX_CHANNEL_B |
			GEN9_AUX_CHANNEL_C |
			GEN9_AUX_CHANNEL_D;

	if (DISPLAY_VER(dev_priv) == 11) {
		mask |= ICL_AUX_CHANNEL_F;
		mask |= ICL_AUX_CHANNEL_E;
	}

	return mask;
}

static u32 gen8_de_pipe_fault_mask(struct drm_i915_private *dev_priv)
{
	if (DISPLAY_VER(dev_priv) >= 13 || HAS_D12_PLANE_MINIMIZATION(dev_priv))
		return RKL_DE_PIPE_IRQ_FAULT_ERRORS;
	else if (DISPLAY_VER(dev_priv) >= 11)
		return GEN11_DE_PIPE_IRQ_FAULT_ERRORS;
	else if (DISPLAY_VER(dev_priv) >= 9)
		return GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
	else
		return GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
}

static void intel_pmdemand_irq_handler(struct drm_i915_private *dev_priv)
{
	wake_up_all(&dev_priv->display.pmdemand.waitqueue);
}

static void
gen8_de_misc_irq_handler(struct drm_i915_private *dev_priv, u32 iir)
{
	bool found = false;

	if (DISPLAY_VER(dev_priv) >= 14) {
		if (iir & (XELPDP_PMDEMAND_RSP |
			   XELPDP_PMDEMAND_RSPTOUT_ERR)) {
			if (iir & XELPDP_PMDEMAND_RSPTOUT_ERR)
				drm_dbg(&dev_priv->drm,
					"Error waiting for Punit PM Demand Response\n");

			intel_pmdemand_irq_handler(dev_priv);
			found = true;
		}
	} else if (iir & GEN8_DE_MISC_GSE) {
		intel_opregion_asle_intr(dev_priv);
		found = true;
	}

	if (iir & GEN8_DE_EDP_PSR) {
		struct intel_encoder *encoder;
		u32 psr_iir;
		i915_reg_t iir_reg;

		for_each_intel_encoder_with_psr(&dev_priv->drm, encoder) {
			struct intel_dp *intel_dp = enc_to_intel_dp(encoder);

			if (DISPLAY_VER(dev_priv) >= 12)
				iir_reg = TRANS_PSR_IIR(intel_dp->psr.transcoder);
			else
				iir_reg = EDP_PSR_IIR;

			psr_iir = intel_uncore_rmw(&dev_priv->uncore, iir_reg, 0, 0);

			if (psr_iir)
				found = true;

			intel_psr_irq_handler(intel_dp, psr_iir);

			/* prior GEN12 only have one EDP PSR */
			if (DISPLAY_VER(dev_priv) < 12)
				break;
		}
	}

	if (!found)
		drm_err(&dev_priv->drm, "Unexpected DE Misc interrupt: 0x%08x\n", iir);
}

static void gen11_dsi_te_interrupt_handler(struct drm_i915_private *dev_priv,
					   u32 te_trigger)
{
	enum pipe pipe = INVALID_PIPE;
	enum transcoder dsi_trans;
	enum port port;
	u32 val;

	/*
	 * Incase of dual link, TE comes from DSI_1
	 * this is to check if dual link is enabled
	 */
	val = intel_uncore_read(&dev_priv->uncore, TRANS_DDI_FUNC_CTL2(TRANSCODER_DSI_0));
	val &= PORT_SYNC_MODE_ENABLE;

	/*
	 * if dual link is enabled, then read DSI_0
	 * transcoder registers
	 */
	port = ((te_trigger & DSI1_TE && val) || (te_trigger & DSI0_TE)) ?
						  PORT_A : PORT_B;
	dsi_trans = (port == PORT_A) ? TRANSCODER_DSI_0 : TRANSCODER_DSI_1;

	/* Check if DSI configured in command mode */
	val = intel_uncore_read(&dev_priv->uncore, DSI_TRANS_FUNC_CONF(dsi_trans));
	val = val & OP_MODE_MASK;

	if (val != CMD_MODE_NO_GATE && val != CMD_MODE_TE_GATE) {
		drm_err(&dev_priv->drm, "DSI trancoder not configured in command mode\n");
		return;
	}

	/* Get PIPE for handling VBLANK event */
	val = intel_uncore_read(&dev_priv->uncore, TRANS_DDI_FUNC_CTL(dsi_trans));
	switch (val & TRANS_DDI_EDP_INPUT_MASK) {
	case TRANS_DDI_EDP_INPUT_A_ON:
		pipe = PIPE_A;
		break;
	case TRANS_DDI_EDP_INPUT_B_ONOFF:
		pipe = PIPE_B;
		break;
	case TRANS_DDI_EDP_INPUT_C_ONOFF:
		pipe = PIPE_C;
		break;
	default:
		drm_err(&dev_priv->drm, "Invalid PIPE\n");
		return;
	}

	intel_handle_vblank(dev_priv, pipe);

	/* clear TE in dsi IIR */
	port = (te_trigger & DSI1_TE) ? PORT_B : PORT_A;
	intel_uncore_rmw(&dev_priv->uncore, DSI_INTR_IDENT_REG(port), 0, 0);
}

static u32 gen8_de_pipe_flip_done_mask(struct drm_i915_private *i915)
{
	if (DISPLAY_VER(i915) >= 9)
		return GEN9_PIPE_PLANE1_FLIP_DONE;
	else
		return GEN8_PIPE_PRIMARY_FLIP_DONE;
}

u32 gen8_de_pipe_underrun_mask(struct drm_i915_private *dev_priv)
{
	u32 mask = GEN8_PIPE_FIFO_UNDERRUN;

	if (DISPLAY_VER(dev_priv) >= 13)
		mask |= XELPD_PIPE_SOFT_UNDERRUN |
			XELPD_PIPE_HARD_UNDERRUN;

	return mask;
}

static void gen8_read_and_ack_pch_irqs(struct drm_i915_private *i915, u32 *pch_iir, u32 *pica_iir)
{
	u32 pica_ier = 0;

	*pica_iir = 0;
	*pch_iir = intel_de_read(i915, SDEIIR);
	if (!*pch_iir)
		return;

	/**
	 * PICA IER must be disabled/re-enabled around clearing PICA IIR and
	 * SDEIIR, to avoid losing PICA IRQs and to ensure that such IRQs set
	 * their flags both in the PICA and SDE IIR.
	 */
	if (*pch_iir & SDE_PICAINTERRUPT) {
		drm_WARN_ON(&i915->drm, INTEL_PCH_TYPE(i915) < PCH_MTL);

		pica_ier = intel_de_rmw(i915, PICAINTERRUPT_IER, ~0, 0);
		*pica_iir = intel_de_read(i915, PICAINTERRUPT_IIR);
		intel_de_write(i915, PICAINTERRUPT_IIR, *pica_iir);
	}

	intel_de_write(i915, SDEIIR, *pch_iir);

	if (pica_ier)
		intel_de_write(i915, PICAINTERRUPT_IER, pica_ier);
}

void gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
{
	u32 iir;
	enum pipe pipe;

	drm_WARN_ON_ONCE(&dev_priv->drm, !HAS_DISPLAY(dev_priv));

	if (master_ctl & GEN8_DE_MISC_IRQ) {
		iir = intel_uncore_read(&dev_priv->uncore, GEN8_DE_MISC_IIR);
		if (iir) {
			intel_uncore_write(&dev_priv->uncore, GEN8_DE_MISC_IIR, iir);
			gen8_de_misc_irq_handler(dev_priv, iir);
		} else {
			drm_err_ratelimited(&dev_priv->drm,
					    "The master control interrupt lied (DE MISC)!\n");
		}
	}

	if (DISPLAY_VER(dev_priv) >= 11 && (master_ctl & GEN11_DE_HPD_IRQ)) {
		iir = intel_uncore_read(&dev_priv->uncore, GEN11_DE_HPD_IIR);
		if (iir) {
			intel_uncore_write(&dev_priv->uncore, GEN11_DE_HPD_IIR, iir);
			gen11_hpd_irq_handler(dev_priv, iir);
		} else {
			drm_err_ratelimited(&dev_priv->drm,
					    "The master control interrupt lied, (DE HPD)!\n");
		}
	}

	if (master_ctl & GEN8_DE_PORT_IRQ) {
		iir = intel_uncore_read(&dev_priv->uncore, GEN8_DE_PORT_IIR);
		if (iir) {
			bool found = false;

			intel_uncore_write(&dev_priv->uncore, GEN8_DE_PORT_IIR, iir);

			if (iir & gen8_de_port_aux_mask(dev_priv)) {
				intel_dp_aux_irq_handler(dev_priv);
				found = true;
			}

			if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
				u32 hotplug_trigger = iir & BXT_DE_PORT_HOTPLUG_MASK;

				if (hotplug_trigger) {
					bxt_hpd_irq_handler(dev_priv, hotplug_trigger);
					found = true;
				}
			} else if (IS_BROADWELL(dev_priv)) {
				u32 hotplug_trigger = iir & BDW_DE_PORT_HOTPLUG_MASK;

				if (hotplug_trigger) {
					ilk_hpd_irq_handler(dev_priv, hotplug_trigger);
					found = true;
				}
			}

			if ((IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) &&
			    (iir & BXT_DE_PORT_GMBUS)) {
				intel_gmbus_irq_handler(dev_priv);
				found = true;
			}

			if (DISPLAY_VER(dev_priv) >= 11) {
				u32 te_trigger = iir & (DSI0_TE | DSI1_TE);

				if (te_trigger) {
					gen11_dsi_te_interrupt_handler(dev_priv, te_trigger);
					found = true;
				}
			}

			if (!found)
				drm_err_ratelimited(&dev_priv->drm,
						    "Unexpected DE Port interrupt\n");
		} else {
			drm_err_ratelimited(&dev_priv->drm,
					    "The master control interrupt lied (DE PORT)!\n");
		}
	}

	for_each_pipe(dev_priv, pipe) {
		u32 fault_errors;

		if (!(master_ctl & GEN8_DE_PIPE_IRQ(pipe)))
			continue;

		iir = intel_uncore_read(&dev_priv->uncore, GEN8_DE_PIPE_IIR(pipe));
		if (!iir) {
			drm_err_ratelimited(&dev_priv->drm,
					    "The master control interrupt lied (DE PIPE)!\n");
			continue;
		}

		intel_uncore_write(&dev_priv->uncore, GEN8_DE_PIPE_IIR(pipe), iir);

		if (iir & GEN8_PIPE_VBLANK)
			intel_handle_vblank(dev_priv, pipe);

		if (iir & gen8_de_pipe_flip_done_mask(dev_priv))
			flip_done_handler(dev_priv, pipe);

		if (iir & GEN8_PIPE_CDCLK_CRC_DONE)
			hsw_pipe_crc_irq_handler(dev_priv, pipe);

		if (iir & gen8_de_pipe_underrun_mask(dev_priv))
			intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);

		fault_errors = iir & gen8_de_pipe_fault_mask(dev_priv);
		if (fault_errors)
			drm_err_ratelimited(&dev_priv->drm,
					    "Fault errors on pipe %c: 0x%08x\n",
					    pipe_name(pipe),
					    fault_errors);
	}

	if (HAS_PCH_SPLIT(dev_priv) && !HAS_PCH_NOP(dev_priv) &&
	    master_ctl & GEN8_DE_PCH_IRQ) {
		u32 pica_iir;

		/*
		 * FIXME(BDW): Assume for now that the new interrupt handling
		 * scheme also closed the SDE interrupt handling race we've seen
		 * on older pch-split platforms. But this needs testing.
		 */
		gen8_read_and_ack_pch_irqs(dev_priv, &iir, &pica_iir);
		if (iir) {
			if (pica_iir)
				xelpdp_pica_irq_handler(dev_priv, pica_iir);

			if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
				icp_irq_handler(dev_priv, iir);
			else if (INTEL_PCH_TYPE(dev_priv) >= PCH_SPT)
				spt_irq_handler(dev_priv, iir);
			else
				cpt_irq_handler(dev_priv, iir);
		} else {
			/*
			 * Like on previous PCH there seems to be something
			 * fishy going on with forwarding PCH interrupts.
			 */
			drm_dbg(&dev_priv->drm,
				"The master control interrupt lied (SDE)!\n");
		}
	}
}

u32 gen11_gu_misc_irq_ack(struct drm_i915_private *i915, const u32 master_ctl)
{
	void __iomem * const regs = intel_uncore_regs(&i915->uncore);
	u32 iir;

	if (!(master_ctl & GEN11_GU_MISC_IRQ))
		return 0;

	iir = raw_reg_read(regs, GEN11_GU_MISC_IIR);
	if (likely(iir))
		raw_reg_write(regs, GEN11_GU_MISC_IIR, iir);

	return iir;
}

void gen11_gu_misc_irq_handler(struct drm_i915_private *i915, const u32 iir)
{
	if (iir & GEN11_GU_MISC_GSE)
		intel_opregion_asle_intr(i915);
}

void gen11_display_irq_handler(struct drm_i915_private *i915)
{
	void __iomem * const regs = intel_uncore_regs(&i915->uncore);
	const u32 disp_ctl = raw_reg_read(regs, GEN11_DISPLAY_INT_CTL);

	disable_rpm_wakeref_asserts(&i915->runtime_pm);
	/*
	 * GEN11_DISPLAY_INT_CTL has same format as GEN8_MASTER_IRQ
	 * for the display related bits.
	 */
	raw_reg_write(regs, GEN11_DISPLAY_INT_CTL, 0x0);
	gen8_de_irq_handler(i915, disp_ctl);
	raw_reg_write(regs, GEN11_DISPLAY_INT_CTL,
		      GEN11_DISPLAY_IRQ_ENABLE);

	enable_rpm_wakeref_asserts(&i915->runtime_pm);
}

/* Called from drm generic code, passed 'crtc' which
 * we use as a pipe index
 */
int i8xx_enable_vblank(struct drm_crtc *crtc)
{
	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
	enum pipe pipe = to_intel_crtc(crtc)->pipe;
	unsigned long irqflags;

	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
	i915_enable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_STATUS);
	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);

	return 0;
}

int i915gm_enable_vblank(struct drm_crtc *crtc)
{
	struct drm_i915_private *dev_priv = to_i915(crtc->dev);

	/*
	 * Vblank interrupts fail to wake the device up from C2+.
	 * Disabling render clock gating during C-states avoids
	 * the problem. There is a small power cost so we do this
	 * only when vblank interrupts are actually enabled.
	 */
	if (dev_priv->vblank_enabled++ == 0)
		intel_uncore_write(&dev_priv->uncore, SCPD0, _MASKED_BIT_ENABLE(CSTATE_RENDER_CLOCK_GATE_DISABLE));

	return i8xx_enable_vblank(crtc);
}

int i965_enable_vblank(struct drm_crtc *crtc)
{
	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
	enum pipe pipe = to_intel_crtc(crtc)->pipe;
	unsigned long irqflags;

	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
	i915_enable_pipestat(dev_priv, pipe,
			     PIPE_START_VBLANK_INTERRUPT_STATUS);
	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);

	return 0;
}

int ilk_enable_vblank(struct drm_crtc *crtc)
{
	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
	enum pipe pipe = to_intel_crtc(crtc)->pipe;
	unsigned long irqflags;
	u32 bit = DISPLAY_VER(dev_priv) >= 7 ?
		DE_PIPE_VBLANK_IVB(pipe) : DE_PIPE_VBLANK(pipe);

	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
	ilk_enable_display_irq(dev_priv, bit);
	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);

	/* Even though there is no DMC, frame counter can get stuck when
	 * PSR is active as no frames are generated.
	 */
	if (HAS_PSR(dev_priv))
		drm_crtc_vblank_restore(crtc);

	return 0;
}

static bool gen11_dsi_configure_te(struct intel_crtc *intel_crtc,
				   bool enable)
{
	struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
	enum port port;

	if (!(intel_crtc->mode_flags &
	    (I915_MODE_FLAG_DSI_USE_TE1 | I915_MODE_FLAG_DSI_USE_TE0)))
		return false;

	/* for dual link cases we consider TE from slave */
	if (intel_crtc->mode_flags & I915_MODE_FLAG_DSI_USE_TE1)
		port = PORT_B;
	else
		port = PORT_A;

	intel_uncore_rmw(&dev_priv->uncore, DSI_INTR_MASK_REG(port), DSI_TE_EVENT,
			 enable ? 0 : DSI_TE_EVENT);

	intel_uncore_rmw(&dev_priv->uncore, DSI_INTR_IDENT_REG(port), 0, 0);

	return true;
}

int bdw_enable_vblank(struct drm_crtc *_crtc)
{
	struct intel_crtc *crtc = to_intel_crtc(_crtc);
	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
	enum pipe pipe = crtc->pipe;
	unsigned long irqflags;

	if (gen11_dsi_configure_te(crtc, true))
		return 0;

	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
	bdw_enable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);

	/* Even if there is no DMC, frame counter can get stuck when
	 * PSR is active as no frames are generated, so check only for PSR.
	 */
	if (HAS_PSR(dev_priv))
		drm_crtc_vblank_restore(&crtc->base);

	return 0;
}

/* Called from drm generic code, passed 'crtc' which
 * we use as a pipe index
 */
void i8xx_disable_vblank(struct drm_crtc *crtc)
{
	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
	enum pipe pipe = to_intel_crtc(crtc)->pipe;
	unsigned long irqflags;

	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
	i915_disable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_STATUS);
	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}

void i915gm_disable_vblank(struct drm_crtc *crtc)
{
	struct drm_i915_private *dev_priv = to_i915(crtc->dev);

	i8xx_disable_vblank(crtc);

	if (--dev_priv->vblank_enabled == 0)
		intel_uncore_write(&dev_priv->uncore, SCPD0, _MASKED_BIT_DISABLE(CSTATE_RENDER_CLOCK_GATE_DISABLE));
}

void i965_disable_vblank(struct drm_crtc *crtc)
{
	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
	enum pipe pipe = to_intel_crtc(crtc)->pipe;
	unsigned long irqflags;

	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
	i915_disable_pipestat(dev_priv, pipe,
			      PIPE_START_VBLANK_INTERRUPT_STATUS);
	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}

void ilk_disable_vblank(struct drm_crtc *crtc)
{
	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
	enum pipe pipe = to_intel_crtc(crtc)->pipe;
	unsigned long irqflags;
	u32 bit = DISPLAY_VER(dev_priv) >= 7 ?
		DE_PIPE_VBLANK_IVB(pipe) : DE_PIPE_VBLANK(pipe);

	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
	ilk_disable_display_irq(dev_priv, bit);
	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}

void bdw_disable_vblank(struct drm_crtc *_crtc)
{
	struct intel_crtc *crtc = to_intel_crtc(_crtc);
	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
	enum pipe pipe = crtc->pipe;
	unsigned long irqflags;

	if (gen11_dsi_configure_te(crtc, false))
		return;

	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
	bdw_disable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}

void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
{
	struct intel_uncore *uncore = &dev_priv->uncore;

	if (IS_CHERRYVIEW(dev_priv))
		intel_uncore_write(uncore, DPINVGTT, DPINVGTT_STATUS_MASK_CHV);
	else
		intel_uncore_write(uncore, DPINVGTT, DPINVGTT_STATUS_MASK_VLV);

	i915_hotplug_interrupt_update_locked(dev_priv, 0xffffffff, 0);
	intel_uncore_rmw(uncore, PORT_HOTPLUG_STAT, 0, 0);

	i9xx_pipestat_irq_reset(dev_priv);

	GEN3_IRQ_RESET(uncore, VLV_);
	dev_priv->irq_mask = ~0u;
}

void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
{
	struct intel_uncore *uncore = &dev_priv->uncore;

	u32 pipestat_mask;
	u32 enable_mask;
	enum pipe pipe;

	pipestat_mask = PIPE_CRC_DONE_INTERRUPT_STATUS;

	i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
	for_each_pipe(dev_priv, pipe)
		i915_enable_pipestat(dev_priv, pipe, pipestat_mask);

	enable_mask = I915_DISPLAY_PORT_INTERRUPT |
		I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
		I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
		I915_LPE_PIPE_A_INTERRUPT |
		I915_LPE_PIPE_B_INTERRUPT;

	if (IS_CHERRYVIEW(dev_priv))
		enable_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT |
			I915_LPE_PIPE_C_INTERRUPT;

	drm_WARN_ON(&dev_priv->drm, dev_priv->irq_mask != ~0u);

	dev_priv->irq_mask = ~enable_mask;

	GEN3_IRQ_INIT(uncore, VLV_, dev_priv->irq_mask, enable_mask);
}

void gen8_display_irq_reset(struct drm_i915_private *dev_priv)
{
	struct intel_uncore *uncore = &dev_priv->uncore;
	enum pipe pipe;

	if (!HAS_DISPLAY(dev_priv))
		return;

	intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff);
	intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff);

	for_each_pipe(dev_priv, pipe)
		if (intel_display_power_is_enabled(dev_priv,
						   POWER_DOMAIN_PIPE(pipe)))
			GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe);

	GEN3_IRQ_RESET(uncore, GEN8_DE_PORT_);
	GEN3_IRQ_RESET(uncore, GEN8_DE_MISC_);
}

void gen11_display_irq_reset(struct drm_i915_private *dev_priv)
{
	struct intel_uncore *uncore = &dev_priv->uncore;
	enum pipe pipe;
	u32 trans_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
		BIT(TRANSCODER_C) | BIT(TRANSCODER_D);

	if (!HAS_DISPLAY(dev_priv))
		return;

	intel_uncore_write(uncore, GEN11_DISPLAY_INT_CTL, 0);

	if (DISPLAY_VER(dev_priv) >= 12) {
		enum transcoder trans;

		for_each_cpu_transcoder_masked(dev_priv, trans, trans_mask) {
			enum intel_display_power_domain domain;

			domain = POWER_DOMAIN_TRANSCODER(trans);
			if (!intel_display_power_is_enabled(dev_priv, domain))
				continue;

			intel_uncore_write(uncore, TRANS_PSR_IMR(trans), 0xffffffff);
			intel_uncore_write(uncore, TRANS_PSR_IIR(trans), 0xffffffff);
		}
	} else {
		intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff);
		intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff);
	}

	for_each_pipe(dev_priv, pipe)
		if (intel_display_power_is_enabled(dev_priv,
						   POWER_DOMAIN_PIPE(pipe)))
			GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe);

	GEN3_IRQ_RESET(uncore, GEN8_DE_PORT_);
	GEN3_IRQ_RESET(uncore, GEN8_DE_MISC_);

	if (DISPLAY_VER(dev_priv) >= 14)
		GEN3_IRQ_RESET(uncore, PICAINTERRUPT_);
	else
		GEN3_IRQ_RESET(uncore, GEN11_DE_HPD_);

	if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
		GEN3_IRQ_RESET(uncore, SDE);
}

void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
				     u8 pipe_mask)
{
	struct intel_uncore *uncore = &dev_priv->uncore;
	u32 extra_ier = GEN8_PIPE_VBLANK |
		gen8_de_pipe_underrun_mask(dev_priv) |
		gen8_de_pipe_flip_done_mask(dev_priv);
	enum pipe pipe;

	spin_lock_irq(&dev_priv->irq_lock);

	if (!intel_irqs_enabled(dev_priv)) {
		spin_unlock_irq(&dev_priv->irq_lock);
		return;
	}

	for_each_pipe_masked(dev_priv, pipe, pipe_mask)
		GEN8_IRQ_INIT_NDX(uncore, DE_PIPE, pipe,
				  dev_priv->de_irq_mask[pipe],
				  ~dev_priv->de_irq_mask[pipe] | extra_ier);

	spin_unlock_irq(&dev_priv->irq_lock);
}

void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv,
				     u8 pipe_mask)
{
	struct intel_uncore *uncore = &dev_priv->uncore;
	enum pipe pipe;

	spin_lock_irq(&dev_priv->irq_lock);

	if (!intel_irqs_enabled(dev_priv)) {
		spin_unlock_irq(&dev_priv->irq_lock);
		return;
	}

	for_each_pipe_masked(dev_priv, pipe, pipe_mask)
		GEN8_IRQ_RESET_NDX(uncore, DE_PIPE, pipe);

	spin_unlock_irq(&dev_priv->irq_lock);

	/* make sure we're done processing display irqs */
	intel_synchronize_irq(dev_priv);
}

/*
 * SDEIER is also touched by the interrupt handler to work around missed PCH
 * interrupts. Hence we can't update it after the interrupt handler is enabled -
 * instead we unconditionally enable all PCH interrupt sources here, but then
 * only unmask them as needed with SDEIMR.
 *
 * Note that we currently do this after installing the interrupt handler,
 * but before we enable the master interrupt. That should be sufficient
 * to avoid races with the irq handler, assuming we have MSI. Shared legacy
 * interrupts could still race.
 */
static void ibx_irq_postinstall(struct drm_i915_private *dev_priv)
{
	struct intel_uncore *uncore = &dev_priv->uncore;
	u32 mask;

	if (HAS_PCH_NOP(dev_priv))
		return;

	if (HAS_PCH_IBX(dev_priv))
		mask = SDE_GMBUS | SDE_AUX_MASK | SDE_POISON;
	else if (HAS_PCH_CPT(dev_priv) || HAS_PCH_LPT(dev_priv))
		mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
	else
		mask = SDE_GMBUS_CPT;

	GEN3_IRQ_INIT(uncore, SDE, ~mask, 0xffffffff);
}

void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv)
{
	lockdep_assert_held(&dev_priv->irq_lock);

	if (dev_priv->display_irqs_enabled)
		return;

	dev_priv->display_irqs_enabled = true;

	if (intel_irqs_enabled(dev_priv)) {
		vlv_display_irq_reset(dev_priv);
		vlv_display_irq_postinstall(dev_priv);
	}
}

void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)
{
	lockdep_assert_held(&dev_priv->irq_lock);

	if (!dev_priv->display_irqs_enabled)
		return;

	dev_priv->display_irqs_enabled = false;

	if (intel_irqs_enabled(dev_priv))
		vlv_display_irq_reset(dev_priv);
}

void ilk_de_irq_postinstall(struct drm_i915_private *i915)
{
	struct intel_uncore *uncore = &i915->uncore;
	u32 display_mask, extra_mask;

	if (DISPLAY_VER(i915) >= 7) {
		display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
				DE_PCH_EVENT_IVB | DE_AUX_CHANNEL_A_IVB);
		extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB |
			      DE_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB |
			      DE_PLANE_FLIP_DONE_IVB(PLANE_C) |
			      DE_PLANE_FLIP_DONE_IVB(PLANE_B) |
			      DE_PLANE_FLIP_DONE_IVB(PLANE_A) |
			      DE_DP_A_HOTPLUG_IVB);
	} else {
		display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
				DE_AUX_CHANNEL_A | DE_PIPEB_CRC_DONE |
				DE_PIPEA_CRC_DONE | DE_POISON);
		extra_mask = (DE_PIPEA_VBLANK | DE_PIPEB_VBLANK |
			      DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN |
			      DE_PLANE_FLIP_DONE(PLANE_A) |
			      DE_PLANE_FLIP_DONE(PLANE_B) |
			      DE_DP_A_HOTPLUG);
	}

	if (IS_HASWELL(i915)) {
		gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR);
		display_mask |= DE_EDP_PSR_INT_HSW;
	}

	if (IS_IRONLAKE_M(i915))
		extra_mask |= DE_PCU_EVENT;

	i915->irq_mask = ~display_mask;

	ibx_irq_postinstall(i915);

	GEN3_IRQ_INIT(uncore, DE, i915->irq_mask,
		      display_mask | extra_mask);
}

static void mtp_irq_postinstall(struct drm_i915_private *i915);
static void icp_irq_postinstall(struct drm_i915_private *i915);

void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
{
	struct intel_uncore *uncore = &dev_priv->uncore;

	u32 de_pipe_masked = gen8_de_pipe_fault_mask(dev_priv) |
		GEN8_PIPE_CDCLK_CRC_DONE;
	u32 de_pipe_enables;
	u32 de_port_masked = gen8_de_port_aux_mask(dev_priv);
	u32 de_port_enables;
	u32 de_misc_masked = GEN8_DE_EDP_PSR;
	u32 trans_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
		BIT(TRANSCODER_C) | BIT(TRANSCODER_D);
	enum pipe pipe;

	if (!HAS_DISPLAY(dev_priv))
		return;

	if (DISPLAY_VER(dev_priv) >= 14)
		mtp_irq_postinstall(dev_priv);
	else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
		icp_irq_postinstall(dev_priv);
	else if (HAS_PCH_SPLIT(dev_priv))
		ibx_irq_postinstall(dev_priv);

	if (DISPLAY_VER(dev_priv) < 11)
		de_misc_masked |= GEN8_DE_MISC_GSE;

	if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
		de_port_masked |= BXT_DE_PORT_GMBUS;

	if (DISPLAY_VER(dev_priv) >= 14) {
		de_misc_masked |= XELPDP_PMDEMAND_RSPTOUT_ERR |
				  XELPDP_PMDEMAND_RSP;
	} else if (DISPLAY_VER(dev_priv) >= 11) {
		enum port port;

		if (intel_bios_is_dsi_present(dev_priv, &port))
			de_port_masked |= DSI0_TE | DSI1_TE;
	}

	de_pipe_enables = de_pipe_masked |
		GEN8_PIPE_VBLANK |
		gen8_de_pipe_underrun_mask(dev_priv) |
		gen8_de_pipe_flip_done_mask(dev_priv);

	de_port_enables = de_port_masked;
	if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
		de_port_enables |= BXT_DE_PORT_HOTPLUG_MASK;
	else if (IS_BROADWELL(dev_priv))
		de_port_enables |= BDW_DE_PORT_HOTPLUG_MASK;

	if (DISPLAY_VER(dev_priv) >= 12) {
		enum transcoder trans;

		for_each_cpu_transcoder_masked(dev_priv, trans, trans_mask) {
			enum intel_display_power_domain domain;

			domain = POWER_DOMAIN_TRANSCODER(trans);
			if (!intel_display_power_is_enabled(dev_priv, domain))
				continue;

			gen3_assert_iir_is_zero(uncore, TRANS_PSR_IIR(trans));
		}
	} else {
		gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR);
	}

	for_each_pipe(dev_priv, pipe) {
		dev_priv->de_irq_mask[pipe] = ~de_pipe_masked;

		if (intel_display_power_is_enabled(dev_priv,
						   POWER_DOMAIN_PIPE(pipe)))
			GEN8_IRQ_INIT_NDX(uncore, DE_PIPE, pipe,
					  dev_priv->de_irq_mask[pipe],
					  de_pipe_enables);
	}

	GEN3_IRQ_INIT(uncore, GEN8_DE_PORT_, ~de_port_masked, de_port_enables);
	GEN3_IRQ_INIT(uncore, GEN8_DE_MISC_, ~de_misc_masked, de_misc_masked);

	if (IS_DISPLAY_VER(dev_priv, 11, 13)) {
		u32 de_hpd_masked = 0;
		u32 de_hpd_enables = GEN11_DE_TC_HOTPLUG_MASK |
				     GEN11_DE_TBT_HOTPLUG_MASK;

		GEN3_IRQ_INIT(uncore, GEN11_DE_HPD_, ~de_hpd_masked,
			      de_hpd_enables);
	}
}

static void mtp_irq_postinstall(struct drm_i915_private *i915)
{
	struct intel_uncore *uncore = &i915->uncore;
	u32 sde_mask = SDE_GMBUS_ICP | SDE_PICAINTERRUPT;
	u32 de_hpd_mask = XELPDP_AUX_TC_MASK;
	u32 de_hpd_enables = de_hpd_mask | XELPDP_DP_ALT_HOTPLUG_MASK |
			     XELPDP_TBT_HOTPLUG_MASK;

	GEN3_IRQ_INIT(uncore, PICAINTERRUPT_, ~de_hpd_mask,
		      de_hpd_enables);

	GEN3_IRQ_INIT(uncore, SDE, ~sde_mask, 0xffffffff);
}

static void icp_irq_postinstall(struct drm_i915_private *dev_priv)
{
	struct intel_uncore *uncore = &dev_priv->uncore;
	u32 mask = SDE_GMBUS_ICP;

	GEN3_IRQ_INIT(uncore, SDE, ~mask, 0xffffffff);
}

void gen11_de_irq_postinstall(struct drm_i915_private *dev_priv)
{
	if (!HAS_DISPLAY(dev_priv))
		return;

	gen8_de_irq_postinstall(dev_priv);

	intel_uncore_write(&dev_priv->uncore, GEN11_DISPLAY_INT_CTL,
			   GEN11_DISPLAY_IRQ_ENABLE);
}

void dg1_de_irq_postinstall(struct drm_i915_private *i915)
{
	if (!HAS_DISPLAY(i915))
		return;

	gen8_de_irq_postinstall(i915);
	intel_uncore_write(&i915->uncore, GEN11_DISPLAY_INT_CTL,
			   GEN11_DISPLAY_IRQ_ENABLE);
}

void intel_display_irq_init(struct drm_i915_private *i915)
{
	i915->drm.vblank_disable_immediate = true;

	/*
	 * Most platforms treat the display irq block as an always-on power
	 * domain. vlv/chv can disable it at runtime and need special care to
	 * avoid writing any of the display block registers outside of the power
	 * domain. We defer setting up the display irqs in this case to the
	 * runtime pm.
	 */
	i915->display_irqs_enabled = true;
	if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
		i915->display_irqs_enabled = false;

	intel_hotplug_irq_init(i915);
}