From 50a540629c680679bfbf30b2752c75ec6317f62e Mon Sep 17 00:00:00 2001
From: Lucas De Marchi <lucas.demarchi@intel.com>
Date: Mon, 13 Jul 2020 11:23:19 -0700
Subject: drm/i915/dg1: add support for the master unit interrupt
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Git-commit: 97b492f5f98357c5238d74b1070d42c5fe4ac75d
Patch-mainline: v5.9-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
DG1 has master unit interrupt register which is used to indicate the
correct source of interrupt.
v2: fix coding style on register definition
Cc: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Cc: Daniele Spurio Ceraolo <daniele.ceraolospurio@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200713182321.12390-4-lucas.demarchi@intel.com
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/i915_debugfs.c | 4 +++
drivers/gpu/drm/i915/i915_irq.c | 56 +++++++++++++++++++++++++++--
drivers/gpu/drm/i915/i915_reg.h | 4 +++
3 files changed, 61 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 78ebede51fb3..784219962193 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -495,6 +495,10 @@ static int i915_interrupt_info(struct seq_file *m, void *data)
seq_printf(m, "PCU interrupt enable:\t%08x\n",
I915_READ(GEN8_PCU_IER));
} else if (INTEL_GEN(dev_priv) >= 11) {
+ if (HAS_MASTER_UNIT_IRQ(dev_priv))
+ seq_printf(m, "Master Unit Interrupt Control: %08x\n",
+ I915_READ(DG1_MSTR_UNIT_INTR));
+
seq_printf(m, "Master Interrupt Control: %08x\n",
I915_READ(GEN11_GFX_MSTR_IRQ));
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 562b43ed077f..4c9d0a4a2476 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2584,6 +2584,46 @@ static irqreturn_t gen11_irq_handler(int irq, void *arg)
gen11_master_intr_enable);
}
+static u32 dg1_master_intr_disable_and_ack(void __iomem * const regs)
+{
+ u32 val;
+
+ /* First disable interrupts */
+ raw_reg_write(regs, DG1_MSTR_UNIT_INTR, 0);
+
+ /* Get the indication levels and ack the master unit */
+ val = raw_reg_read(regs, DG1_MSTR_UNIT_INTR);
+ if (unlikely(!val))
+ return 0;
+
+ raw_reg_write(regs, DG1_MSTR_UNIT_INTR, val);
+
+ /*
+ * Now with master disabled, get a sample of level indications
+ * for this interrupt and ack them right away - we keep GEN11_MASTER_IRQ
+ * out as this bit doesn't exist anymore for DG1
+ */
+ val = raw_reg_read(regs, GEN11_GFX_MSTR_IRQ) & ~GEN11_MASTER_IRQ;
+ if (unlikely(!val))
+ return 0;
+
+ raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, val);
+
+ return val;
+}
+
+static inline void dg1_master_intr_enable(void __iomem * const regs)
+{
+ raw_reg_write(regs, DG1_MSTR_UNIT_INTR, DG1_MSTR_IRQ);
+}
+
+static irqreturn_t dg1_irq_handler(int irq, void *arg)
+{
+ return __gen11_irq_handler(arg,
+ dg1_master_intr_disable_and_ack,
+ dg1_master_intr_enable);
+}
+
/* Called from drm generic code, passed 'crtc' which
* we use as a pipe index
*/
@@ -2920,7 +2960,10 @@ static void gen11_irq_reset(struct drm_i915_private *dev_priv)
{
struct intel_uncore *uncore = &dev_priv->uncore;
- gen11_master_intr_disable(dev_priv->uncore.regs);
+ if (HAS_MASTER_UNIT_IRQ(dev_priv))
+ dg1_master_intr_disable_and_ack(dev_priv->uncore.regs);
+ else
+ gen11_master_intr_disable(dev_priv->uncore.regs);
gen11_gt_irq_reset(&dev_priv->gt);
gen11_display_irq_reset(dev_priv);
@@ -3517,8 +3560,13 @@ static void gen11_irq_postinstall(struct drm_i915_private *dev_priv)
I915_WRITE(GEN11_DISPLAY_INT_CTL, GEN11_DISPLAY_IRQ_ENABLE);
- gen11_master_intr_enable(uncore->regs);
- POSTING_READ(GEN11_GFX_MSTR_IRQ);
+ if (HAS_MASTER_UNIT_IRQ(dev_priv)) {
+ dg1_master_intr_enable(uncore->regs);
+ POSTING_READ(DG1_MSTR_UNIT_INTR);
+ } else {
+ gen11_master_intr_enable(uncore->regs);
+ POSTING_READ(GEN11_GFX_MSTR_IRQ);
+ }
}
static void cherryview_irq_postinstall(struct drm_i915_private *dev_priv)
@@ -4043,6 +4091,8 @@ static irq_handler_t intel_irq_handler(struct drm_i915_private *dev_priv)
else
return i8xx_irq_handler;
} else {
+ if (HAS_MASTER_UNIT_IRQ(dev_priv))
+ return dg1_irq_handler;
if (INTEL_GEN(dev_priv) >= 11)
return gen11_irq_handler;
else if (INTEL_GEN(dev_priv) >= 8)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 86a23ced051b..4e796ff4d7d0 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7733,6 +7733,10 @@ enum {
#define GEN11_GT_DW1_IRQ (1 << 1)
#define GEN11_GT_DW0_IRQ (1 << 0)
+#define DG1_MSTR_UNIT_INTR _MMIO(0x190008)
+#define DG1_MSTR_IRQ REG_BIT(31)
+#define DG1_MSTR_UNIT(u) REG_BIT(u)
+
#define GEN11_DISPLAY_INT_CTL _MMIO(0x44200)
#define GEN11_DISPLAY_IRQ_ENABLE (1 << 31)
#define GEN11_AUDIO_CODEC_IRQ (1 << 24)
--
2.29.2