From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
As with ILK/SNB wire up the port A HPD on IVB/HSW.
This might be more important on HSW with PSR. BSpec tells us that if the
automagic link training performed by the hardware fails for some reason,
we're going to get a short HPD and are supposed to re-train the link
manyally.
v2: 0 initialize pin_mask/long_mask due to intel_get_hpd_pins() changes
Add a comment about the pulse duration bits being reserved on HSW+
like we have for LPT+ in ibx_hpd_irq_setup()
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_irq.c | 35 ++++++++++++++++++++++++++++-------
1 file changed, 28 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 45ab75c..a34521c 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -49,6 +49,10 @@ 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,
+};
+
static const u32 hpd_ibx[HPD_NUM_PINS] = {
[HPD_CRT] = SDE_CRT_HOTPLUG,
[HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
@@ -1940,6 +1944,19 @@ static void ivb_display_irq_handler(struct drm_device *dev, u32 de_iir)
{
struct drm_i915_private *dev_priv = dev->dev_private;
enum pipe pipe;
+ u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG_IVB;
+
+ if (hotplug_trigger) {
+ u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
+
+ dig_hotplug_reg = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
+ I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, dig_hotplug_reg);
+
+ intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
+ dig_hotplug_reg, hpd_ivb,
+ ilk_port_hotplug_long_detect);
+ intel_hpd_irq_handler(dev, pin_mask, long_mask);
+ }
if (de_iir & DE_ERR_INT_IVB)
ivb_err_int_handler(dev);
@@ -3137,14 +3154,20 @@ static void ilk_hpd_irq_setup(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
u32 hotplug_irqs, hotplug, enabled_irqs;
- hotplug_irqs = DE_DP_A_HOTPLUG;
- enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_ilk);
+ if (INTEL_INFO(dev)->gen >= 7) {
+ hotplug_irqs = DE_DP_A_HOTPLUG_IVB;
+ enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_ivb);
+ } else {
+ hotplug_irqs = DE_DP_A_HOTPLUG;
+ enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_ilk);
+ }
ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
/*
* Enable digital hotplug on the CPU, and configure the DP short pulse
* duration to 2ms (which is the minimum in the Display Port spec)
+ * The pulse duration bits are reserved on HSW+.
*/
hotplug = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
hotplug &= ~DIGITAL_PORTA_PULSE_DURATION_MASK;
@@ -3245,7 +3268,8 @@ static int ironlake_irq_postinstall(struct drm_device *dev)
DE_PLANEB_FLIP_DONE_IVB |
DE_PLANEA_FLIP_DONE_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_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB |
+ DE_DP_A_HOTPLUG_IVB);
} else {
display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
@@ -4270,10 +4294,7 @@ void intel_irq_init(struct drm_i915_private *dev_priv)
dev->driver->irq_uninstall = ironlake_irq_uninstall;
dev->driver->enable_vblank = ironlake_enable_vblank;
dev->driver->disable_vblank = ironlake_disable_vblank;
- if (INTEL_INFO(dev)->gen >= 7)
- dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
- else
- dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
+ dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
} else {
if (INTEL_INFO(dev_priv)->gen == 2) {
dev->driver->irq_preinstall = i8xx_irq_preinstall;
--
2.4.6
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