commit 2a57d9cce1c08578097d965468e37f06d71fa495 upstream. For LSPCON resume time initialization we need to sample the corresponding pin's HPD level, but this is only available when HPD detection is enabled. Currently we enable detection only when enabling HPD interrupts which is too late, so bring the enabling of detection earlier. This is needed by the next patch. Cc: Shashank Sharma <shashank.sharma@xxxxxxxxx> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> Reviewed-by: Shashank Sharma <shashank.sharma@xxxxxxxxx> Link: http://patchwork.freedesktop.org/patch/msgid/1485509961-9010-2-git-send-email-imre.deak@xxxxxxxxx Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> (rebased onto v4.10.4 due to missing s/IS_BROXTON/IS_GEN9_LP/ upstream change) (corrected stable tag) Cc: <stable@xxxxxxxxxxxxxxx> # v4.10 Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx> --- drivers/gpu/drm/i915/i915_irq.c | 71 +++++++++++++++++++++++++++++------------ 1 file changed, 51 insertions(+), 20 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 07ca71c..f914581 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -3089,24 +3089,33 @@ static void ibx_hpd_irq_setup(struct drm_i915_private *dev_priv) I915_WRITE(PCH_PORT_HOTPLUG, hotplug); } +static void spt_hpd_detection_setup(struct drm_i915_private *dev_priv) +{ + u32 hotplug; + + /* Enable digital hotplug on the PCH */ + hotplug = I915_READ(PCH_PORT_HOTPLUG); + hotplug |= PORTA_HOTPLUG_ENABLE | + PORTB_HOTPLUG_ENABLE | + PORTC_HOTPLUG_ENABLE | + PORTD_HOTPLUG_ENABLE; + I915_WRITE(PCH_PORT_HOTPLUG, hotplug); + + hotplug = I915_READ(PCH_PORT_HOTPLUG2); + hotplug |= PORTE_HOTPLUG_ENABLE; + I915_WRITE(PCH_PORT_HOTPLUG2, hotplug); +} + static void spt_hpd_irq_setup(struct drm_i915_private *dev_priv) { - u32 hotplug_irqs, hotplug, enabled_irqs; + u32 hotplug_irqs, enabled_irqs; hotplug_irqs = SDE_HOTPLUG_MASK_SPT; enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_spt); ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs); - /* Enable digital hotplug on the PCH */ - hotplug = I915_READ(PCH_PORT_HOTPLUG); - hotplug |= PORTD_HOTPLUG_ENABLE | PORTC_HOTPLUG_ENABLE | - PORTB_HOTPLUG_ENABLE | PORTA_HOTPLUG_ENABLE; - I915_WRITE(PCH_PORT_HOTPLUG, hotplug); - - hotplug = I915_READ(PCH_PORT_HOTPLUG2); - hotplug |= PORTE_HOTPLUG_ENABLE; - I915_WRITE(PCH_PORT_HOTPLUG2, hotplug); + spt_hpd_detection_setup(dev_priv); } static void ilk_hpd_irq_setup(struct drm_i915_private *dev_priv) @@ -3143,18 +3152,15 @@ static void ilk_hpd_irq_setup(struct drm_i915_private *dev_priv) ibx_hpd_irq_setup(dev_priv); } -static void bxt_hpd_irq_setup(struct drm_i915_private *dev_priv) +static void __bxt_hpd_detection_setup(struct drm_i915_private *dev_priv, + u32 enabled_irqs) { - u32 hotplug_irqs, hotplug, enabled_irqs; - - enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_bxt); - hotplug_irqs = BXT_DE_PORT_HOTPLUG_MASK; - - bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs); + u32 hotplug; hotplug = I915_READ(PCH_PORT_HOTPLUG); - hotplug |= PORTC_HOTPLUG_ENABLE | PORTB_HOTPLUG_ENABLE | - PORTA_HOTPLUG_ENABLE; + hotplug |= PORTA_HOTPLUG_ENABLE | + PORTB_HOTPLUG_ENABLE | + PORTC_HOTPLUG_ENABLE; DRM_DEBUG_KMS("Invert bit setting: hp_ctl:%x hp_port:%x\n", hotplug, enabled_irqs); @@ -3164,7 +3170,6 @@ static void bxt_hpd_irq_setup(struct drm_i915_private *dev_priv) * For BXT invert bit has to be set based on AOB design * for HPD detection logic, update it based on VBT fields. */ - if ((enabled_irqs & BXT_DE_PORT_HP_DDIA) && intel_bios_is_port_hpd_inverted(dev_priv, PORT_A)) hotplug |= BXT_DDIA_HPD_INVERT; @@ -3178,6 +3183,23 @@ static void bxt_hpd_irq_setup(struct drm_i915_private *dev_priv) I915_WRITE(PCH_PORT_HOTPLUG, hotplug); } +static void bxt_hpd_detection_setup(struct drm_i915_private *dev_priv) +{ + __bxt_hpd_detection_setup(dev_priv, BXT_DE_PORT_HOTPLUG_MASK); +} + +static void bxt_hpd_irq_setup(struct drm_i915_private *dev_priv) +{ + u32 hotplug_irqs, enabled_irqs; + + enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_bxt); + hotplug_irqs = BXT_DE_PORT_HOTPLUG_MASK; + + bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs); + + __bxt_hpd_detection_setup(dev_priv, enabled_irqs); +} + static void ibx_irq_postinstall(struct drm_device *dev) { struct drm_i915_private *dev_priv = to_i915(dev); @@ -3193,6 +3215,12 @@ static void ibx_irq_postinstall(struct drm_device *dev) gen5_assert_iir_is_zero(dev_priv, SDEIIR); I915_WRITE(SDEIMR, ~mask); + + if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv) || + HAS_PCH_LPT(dev_priv)) + ; /* TODO: Enable HPD detection on older PCH platforms too */ + else + spt_hpd_detection_setup(dev_priv); } static void gen5_gt_irq_postinstall(struct drm_device *dev) @@ -3404,6 +3432,9 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv) GEN5_IRQ_INIT(GEN8_DE_PORT_, ~de_port_masked, de_port_enables); GEN5_IRQ_INIT(GEN8_DE_MISC_, ~de_misc_masked, de_misc_masked); + + if (IS_BROXTON(dev_priv)) + bxt_hpd_detection_setup(dev_priv); } static int gen8_irq_postinstall(struct drm_device *dev) -- 2.5.0