From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu, 5 Apr 2018 15:00:23 -0700
Subject: drm/i915: Enable edp psr error interrupts on hsw
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Git-commit: fc34044248b611ea3f8b6e55b4ed404192a4f295
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
The definitions for the error register should be valid on bdw/skl too,
but there we haven't even enabled DE_MISC handling yet.
Somewhat confusing the the moved register offset on bdw is only for
the _CTL/_AUX register, and that _IIR/IMR stayed where they have been
on bdw.
v2: Fixes from Ville.
v3: From DK
* Rebased on drm-tip
* Removed BDW IIR bit definition, looks like an unintentional change that
should be in the following patch.
v4: From DK
* Don't mask REG_WRITE.
References: bspec/11974 [SRD Interrupt Bit Definition DevHSW]
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Jose Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180405220023.9449-1-dhinakaran.pandiyan@intel.com
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/i915_irq.c | 34 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/i915_reg.h | 8 ++++++++
2 files changed, 42 insertions(+)
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2452,6 +2452,26 @@ static void ilk_display_irq_handler(stru
ironlake_rps_change_irq_handler(dev_priv);
}
+static void hsw_edp_psr_irq_handler(struct drm_i915_private *dev_priv)
+{
+ u32 edp_psr_iir = I915_READ(EDP_PSR_IIR);
+
+ if (edp_psr_iir & EDP_PSR_ERROR)
+ DRM_DEBUG_KMS("PSR error\n");
+
+ if (edp_psr_iir & EDP_PSR_PRE_ENTRY) {
+ DRM_DEBUG_KMS("PSR prepare entry in 2 vblanks\n");
+ I915_WRITE(EDP_PSR_IMR, EDP_PSR_PRE_ENTRY);
+ }
+
+ if (edp_psr_iir & EDP_PSR_POST_EXIT) {
+ DRM_DEBUG_KMS("PSR exit completed\n");
+ I915_WRITE(EDP_PSR_IMR, 0);
+ }
+
+ I915_WRITE(EDP_PSR_IIR, edp_psr_iir);
+}
+
static void ivb_display_irq_handler(struct drm_i915_private *dev_priv,
u32 de_iir)
{
@@ -2464,6 +2484,9 @@ static void ivb_display_irq_handler(stru
if (de_iir & DE_ERR_INT_IVB)
ivb_err_int_handler(dev_priv);
+ if (de_iir & DE_EDP_PSR_INT_HSW)
+ hsw_edp_psr_irq_handler(dev_priv);
+
if (de_iir & DE_AUX_CHANNEL_A_IVB)
dp_aux_irq_handler(dev_priv);
@@ -3348,6 +3371,11 @@ static void ironlake_irq_reset(struct dr
if (IS_GEN7(dev_priv))
I915_WRITE(GEN7_ERR_INT, 0xffffffff);
+ if (IS_HASWELL(dev_priv)) {
+ I915_WRITE(EDP_PSR_IMR, 0xffffffff);
+ I915_WRITE(EDP_PSR_IIR, 0xffffffff);
+ }
+
gen5_gt_irq_reset(dev_priv);
ibx_irq_reset(dev_priv);
@@ -3762,6 +3790,12 @@ static int ironlake_irq_postinstall(stru
DE_DP_A_HOTPLUG);
}
+ if (IS_HASWELL(dev_priv)) {
+ gen3_assert_iir_is_zero(dev_priv, EDP_PSR_IIR);
+ I915_WRITE(EDP_PSR_IMR, 0);
+ display_mask |= DE_EDP_PSR_INT_HSW;
+ }
+
dev_priv->irq_mask = ~display_mask;
ibx_irq_pre_postinstall(dev);
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4026,6 +4026,13 @@ enum {
#define EDP_PSR_TP1_TIME_0us (3<<4)
#define EDP_PSR_IDLE_FRAME_SHIFT 0
+/* Bspec claims those aren't shifted but stay at 0x64800 */
+#define EDP_PSR_IMR _MMIO(0x64834)
+#define EDP_PSR_IIR _MMIO(0x64838)
+#define EDP_PSR_ERROR (1<<2)
+#define EDP_PSR_POST_EXIT (1<<1)
+#define EDP_PSR_PRE_ENTRY (1<<0)
+
#define EDP_PSR_AUX_CTL _MMIO(dev_priv->psr_mmio_base + 0x10)
#define EDP_PSR_AUX_CTL_TIME_OUT_MASK (3 << 26)
#define EDP_PSR_AUX_CTL_MESSAGE_SIZE_MASK (0x1f << 20)
@@ -6837,6 +6844,7 @@ enum {
#define DE_PCH_EVENT_IVB (1<<28)
#define DE_DP_A_HOTPLUG_IVB (1<<27)
#define DE_AUX_CHANNEL_A_IVB (1<<26)
+#define DE_EDP_PSR_INT_HSW (1<<19)
#define DE_SPRITEC_FLIP_DONE_IVB (1<<14)
#define DE_PLANEC_FLIP_DONE_IVB (1<<13)
#define DE_PIPEC_VBLANK_IVB (1<<10)