[Intel-gfx] [PATCH v2 11/17] drm/i915: Add port A HPD support for BDW
Paulo Zanoni
przanoni at gmail.com
Fri Aug 28 13:51:34 PDT 2015
2015-08-27 17:56 GMT-03:00 <ville.syrjala at linux.intel.com>:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Wire up the port A HPD for BDW. Compared to earlier platforms the
> interrupt setup is a bit different, but basically everything else
> looks the same.
>
> v2: 0 initialize pin_mask/long_mask due to intel_get_hpd_pins() changes
> Check for BDW before processing the HPD to not break BXT
> Set found=true when processing port A HPD
> Sort out the mess I made of the irq setup in v1
Ouch for the one above. So xx_port_masked should actually be
xx_port_unmask. That is very confusing. I know, not your fault, but
maybe you can just decide to fix it.
Reviewed-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
> Warn about bad irq mask vs. enable bits in bdw_update_port_irq() (Paulo)
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
> drivers/gpu/drm/i915/i915_irq.c | 86 +++++++++++++++++++++++++++++++++++------
> 1 file changed, 74 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index 886518d..4d1533c 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -53,6 +53,10 @@ static const u32 hpd_ivb[HPD_NUM_PINS] = {
> [HPD_PORT_A] = DE_DP_A_HOTPLUG_IVB,
> };
>
> +static const u32 hpd_bdw[HPD_NUM_PINS] = {
> + [HPD_PORT_A] = GEN8_PORT_DP_A_HOTPLUG,
> +};
> +
> static const u32 hpd_ibx[HPD_NUM_PINS] = {
> [HPD_CRT] = SDE_CRT_HOTPLUG,
> [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
> @@ -371,6 +375,38 @@ void gen6_disable_rps_interrupts(struct drm_device *dev)
> }
>
> /**
> + * bdw_update_port_irq - update DE port interrupt
> + * @dev_priv: driver private
> + * @interrupt_mask: mask of interrupt bits to update
> + * @enabled_irq_mask: mask of interrupt bits to enable
> + */
> +static void bdw_update_port_irq(struct drm_i915_private *dev_priv,
> + uint32_t interrupt_mask,
> + uint32_t enabled_irq_mask)
> +{
> + uint32_t new_val;
> + uint32_t old_val;
> +
> + assert_spin_locked(&dev_priv->irq_lock);
> +
> + WARN_ON(enabled_irq_mask & ~interrupt_mask);
> +
> + if (WARN_ON(!intel_irqs_enabled(dev_priv)))
> + return;
> +
> + old_val = I915_READ(GEN8_DE_PORT_IMR);
> +
> + new_val = old_val;
> + new_val &= ~interrupt_mask;
> + new_val |= (~enabled_irq_mask & interrupt_mask);
> +
> + if (new_val != old_val) {
> + I915_WRITE(GEN8_DE_PORT_IMR, new_val);
> + POSTING_READ(GEN8_DE_PORT_IMR);
> + }
> +}
> +
> +/**
> * ibx_display_interrupt_update - update SDEIMR
> * @dev_priv: driver private
> * @interrupt_mask: mask of interrupt bits to update
> @@ -2139,10 +2175,24 @@ static irqreturn_t gen8_irq_handler(int irq, void *arg)
> tmp = I915_READ(GEN8_DE_PORT_IIR);
> if (tmp) {
> bool found = false;
> + u32 hotplug_trigger = tmp & GEN8_PORT_DP_A_HOTPLUG;
>
> I915_WRITE(GEN8_DE_PORT_IIR, tmp);
> ret = IRQ_HANDLED;
>
> + if (IS_BROADWELL(dev) && 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_bdw,
> + ilk_port_hotplug_long_detect);
> + intel_hpd_irq_handler(dev, pin_mask, long_mask);
> + found = true;
> + }
> +
> if (tmp & aux_mask) {
> dp_aux_irq_handler(dev);
> found = true;
> @@ -3160,15 +3210,22 @@ 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;
>
> - if (INTEL_INFO(dev)->gen >= 7) {
> + if (INTEL_INFO(dev)->gen >= 8) {
> + hotplug_irqs = GEN8_PORT_DP_A_HOTPLUG;
> + enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_bdw);
> +
> + bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
> + } else if (INTEL_INFO(dev)->gen >= 7) {
> hotplug_irqs = DE_DP_A_HOTPLUG_IVB;
> enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_ivb);
> +
> + ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
> } 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);
> + ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
> + }
>
> /*
> * Enable digital hotplug on the CPU, and configure the DP short pulse
> @@ -3480,24 +3537,29 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
> {
> uint32_t de_pipe_masked = GEN8_PIPE_CDCLK_CRC_DONE;
> uint32_t de_pipe_enables;
> - int pipe;
> - u32 de_port_en = GEN8_AUX_CHANNEL_A;
> + u32 de_port_masked = GEN8_AUX_CHANNEL_A;
> + u32 de_port_enables;
> + enum pipe pipe;
>
> if (IS_GEN9(dev_priv)) {
> de_pipe_masked |= GEN9_PIPE_PLANE1_FLIP_DONE |
> GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
> - de_port_en |= GEN9_AUX_CHANNEL_B | GEN9_AUX_CHANNEL_C |
> - GEN9_AUX_CHANNEL_D;
> -
> + de_port_masked |= GEN9_AUX_CHANNEL_B | GEN9_AUX_CHANNEL_C |
> + GEN9_AUX_CHANNEL_D;
> if (IS_BROXTON(dev_priv))
> - de_port_en |= BXT_DE_PORT_GMBUS;
> - } else
> + de_port_masked |= BXT_DE_PORT_GMBUS;
> + } else {
> de_pipe_masked |= GEN8_PIPE_PRIMARY_FLIP_DONE |
> GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
> + }
>
> de_pipe_enables = de_pipe_masked | GEN8_PIPE_VBLANK |
> GEN8_PIPE_FIFO_UNDERRUN;
>
> + de_port_enables = de_port_masked;
> + if (IS_BROADWELL(dev_priv))
> + de_port_enables |= GEN8_PORT_DP_A_HOTPLUG;
> +
> dev_priv->de_irq_mask[PIPE_A] = ~de_pipe_masked;
> dev_priv->de_irq_mask[PIPE_B] = ~de_pipe_masked;
> dev_priv->de_irq_mask[PIPE_C] = ~de_pipe_masked;
> @@ -3509,7 +3571,7 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
> dev_priv->de_irq_mask[pipe],
> de_pipe_enables);
>
> - GEN5_IRQ_INIT(GEN8_DE_PORT_, ~de_port_en, de_port_en);
> + GEN5_IRQ_INIT(GEN8_DE_PORT_, ~de_port_masked, de_port_enables);
> }
>
> static int gen8_irq_postinstall(struct drm_device *dev)
> @@ -4292,7 +4354,7 @@ void intel_irq_init(struct drm_i915_private *dev_priv)
> else if (HAS_PCH_SPT(dev))
> dev_priv->display.hpd_irq_setup = spt_hpd_irq_setup;
> else
> - dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
> + dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
> } else if (HAS_PCH_SPLIT(dev)) {
> dev->driver->irq_handler = ironlake_irq_handler;
> dev->driver->irq_preinstall = ironlake_irq_reset;
> --
> 2.4.6
>
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--
Paulo Zanoni
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