From 23bb4cb5122c2c6379be38aaa5c0fd6786ae6c3a Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Thu, 27 Aug 2015 23:56:04 +0300 Subject: [PATCH] drm/i915: Add port A HPD support for IVB/HSW MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- 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 57d23f0163eb..8864aaf9d30a 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, @@ -1946,6 +1950,19 @@ 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); @@ -3143,14 +3160,20 @@ 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; @@ -3251,7 +3274,8 @@ 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 | @@ -4276,10 +4300,7 @@ 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; -- 2.20.1