[Intel-gfx] [PATCH 02/10] drm/i915: Fix up vlv/chv display irq setup
Ville Syrjälä
ville.syrjala at linux.intel.com
Tue Apr 12 09:05:32 UTC 2016
On Mon, Apr 11, 2016 at 07:29:13PM +0300, Imre Deak wrote:
> On ma, 2016-04-11 at 16:56 +0300, ville.syrjala at linux.intel.com wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> >
> > The vlv/chv display irq setup was a bit of mess after I ran out of steam
> > when working on it last. Fix it up so that we just have a _reset() and
> > _postinstall() hooks for the display irqs, and use those consistently.
> >
> > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > ---
> > drivers/gpu/drm/i915/i915_irq.c | 102 ++++++++++------------------------------
> > 1 file changed, 24 insertions(+), 78 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> > index 1d21ebfffd4d..a1239fedc086 100644
> > --- a/drivers/gpu/drm/i915/i915_irq.c
> > +++ b/drivers/gpu/drm/i915/i915_irq.c
> > @@ -3306,13 +3306,15 @@ static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
> > {
> > enum pipe pipe;
> >
> > - i915_hotplug_interrupt_update(dev_priv, 0xFFFFFFFF, 0);
> > + i915_hotplug_interrupt_update_locked(dev_priv, 0xffffffff, 0);
> > I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
> >
> > for_each_pipe(dev_priv, pipe)
> > I915_WRITE(PIPESTAT(pipe), 0xffff);
>
> Since vlv_display_irq_reset() will be used in place
> of valleyview_display_irqs_uninstall()/i915_disable_pipestat()
> we'll leave now stale bits in pipestat_irq_mask[pipe]. It's not a
> problem since display_irqs_enabled effectively masks these bits, but
> for consistency I'd clear them.
OTOH we can't mask PIPESTAT bits, so even if we clear them here, it's
very likely some of the bits will be set again by the time we actually
enable an interrupt.
In any case, I think I'll be posting a patch to clean up the PIPESTAT
clearing/disabling acrosss the board. It's a bit of a mess right now,
with each platform doing things slightly differently.
>
> The same goes for clearing PIPE_FIFO_UNDERRUN_STATUS.
>
> With that:
> Reviewed-by: Imre Deak <imre.deak at intel.com>
>
> >
> > GEN5_IRQ_RESET(VLV_);
> > +
> > + dev_priv->irq_mask = ~0;
> > }
>
>
>
> >
> > static void valleyview_irq_preinstall(struct drm_device *dev)
> > @@ -3323,7 +3325,9 @@ static void valleyview_irq_preinstall(struct drm_device *dev)
> >
> > I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
> >
> > + spin_lock_irq(&dev_priv->irq_lock);
> > vlv_display_irq_reset(dev_priv);
> > + spin_unlock_irq(&dev_priv->irq_lock);
> > }
> >
> > static void gen8_gt_irq_reset(struct drm_i915_private *dev_priv)
> > @@ -3398,7 +3402,9 @@ static void cherryview_irq_preinstall(struct drm_device *dev)
> >
> > I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK_CHV);
> >
> > + spin_lock_irq(&dev_priv->irq_lock);
> > vlv_display_irq_reset(dev_priv);
> > + spin_unlock_irq(&dev_priv->irq_lock);
> > }
> >
> > static u32 intel_hpd_enabled_irqs(struct drm_device *dev,
> > @@ -3645,7 +3651,7 @@ static int ironlake_irq_postinstall(struct drm_device *dev)
> > return 0;
> > }
> >
> > -static void valleyview_display_irqs_install(struct drm_i915_private *dev_priv)
> > +static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
> > {
> > u32 pipestat_mask;
> > u32 iir_mask;
> > @@ -3679,40 +3685,6 @@ static void valleyview_display_irqs_install(struct drm_i915_private *dev_priv)
> > POSTING_READ(VLV_IMR);
> > }
> >
> > -static void valleyview_display_irqs_uninstall(struct drm_i915_private *dev_priv)
> > -{
> > - u32 pipestat_mask;
> > - u32 iir_mask;
> > - enum pipe pipe;
> > -
> > - iir_mask = I915_DISPLAY_PORT_INTERRUPT |
> > - I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
> > - I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
> > - if (IS_CHERRYVIEW(dev_priv))
> > - iir_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
> > -
> > - dev_priv->irq_mask |= iir_mask;
> > - I915_WRITE(VLV_IMR, dev_priv->irq_mask);
> > - I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
> > - I915_WRITE(VLV_IIR, iir_mask);
> > - I915_WRITE(VLV_IIR, iir_mask);
> > - POSTING_READ(VLV_IIR);
> > -
> > - pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV |
> > - PIPE_CRC_DONE_INTERRUPT_STATUS;
> > -
> > - i915_disable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
> > - for_each_pipe(dev_priv, pipe)
> > - i915_disable_pipestat(dev_priv, pipe, pipestat_mask);
> > -
> > - pipestat_mask = PIPESTAT_INT_STATUS_MASK |
> > - PIPE_FIFO_UNDERRUN_STATUS;
> > -
> > - for_each_pipe(dev_priv, pipe)
> > - I915_WRITE(PIPESTAT(pipe), pipestat_mask);
> > - POSTING_READ(PIPESTAT(PIPE_A));
> > -}
> > -
> > void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv)
> > {
> > assert_spin_locked(&dev_priv->irq_lock);
> > @@ -3723,7 +3695,7 @@ void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv)
> > dev_priv->display_irqs_enabled = true;
> >
> > if (intel_irqs_enabled(dev_priv))
> > - valleyview_display_irqs_install(dev_priv);
> > + vlv_display_irq_postinstall(dev_priv);
> > }
> >
> > void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)
> > @@ -3736,36 +3708,14 @@ void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)
> > dev_priv->display_irqs_enabled = false;
> >
> > if (intel_irqs_enabled(dev_priv))
> > - valleyview_display_irqs_uninstall(dev_priv);
> > + vlv_display_irq_reset(dev_priv);
> > }
> >
> > -static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
> > -{
> > - dev_priv->irq_mask = ~0;
> > -
> > - i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
> > - POSTING_READ(PORT_HOTPLUG_EN);
> > -
> > - I915_WRITE(VLV_IIR, 0xffffffff);
> > - I915_WRITE(VLV_IIR, 0xffffffff);
> > - I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
> > - I915_WRITE(VLV_IMR, dev_priv->irq_mask);
> > - POSTING_READ(VLV_IMR);
> > -
> > - /* Interrupt setup is already guaranteed to be single-threaded, this is
> > - * just to make the assert_spin_locked check happy. */
> > - spin_lock_irq(&dev_priv->irq_lock);
> > - if (dev_priv->display_irqs_enabled)
> > - valleyview_display_irqs_install(dev_priv);
> > - spin_unlock_irq(&dev_priv->irq_lock);
> > -}
> >
> > static int valleyview_irq_postinstall(struct drm_device *dev)
> > {
> > struct drm_i915_private *dev_priv = dev->dev_private;
> >
> > - vlv_display_irq_postinstall(dev_priv);
> > -
> > gen5_gt_irq_postinstall(dev);
> >
> > /* ack & enable invalid PTE error interrupts */
> > @@ -3774,6 +3724,10 @@ static int valleyview_irq_postinstall(struct drm_device *dev)
> > I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
> > #endif
> >
> > + spin_lock_irq(&dev_priv->irq_lock);
> > + vlv_display_irq_postinstall(dev_priv);
> > + spin_unlock_irq(&dev_priv->irq_lock);
> > +
> > I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
> >
> > return 0;
> > @@ -3874,10 +3828,12 @@ static int cherryview_irq_postinstall(struct drm_device *dev)
> > {
> > struct drm_i915_private *dev_priv = dev->dev_private;
> >
> > - vlv_display_irq_postinstall(dev_priv);
> > -
> > gen8_gt_irq_postinstall(dev_priv);
> >
> > + spin_lock_irq(&dev_priv->irq_lock);
> > + vlv_display_irq_postinstall(dev_priv);
> > + spin_unlock_irq(&dev_priv->irq_lock);
> > +
> > I915_WRITE(GEN8_MASTER_IRQ, MASTER_INTERRUPT_ENABLE);
> > POSTING_READ(GEN8_MASTER_IRQ);
> >
> > @@ -3894,20 +3850,6 @@ static void gen8_irq_uninstall(struct drm_device *dev)
> > gen8_irq_reset(dev);
> > }
> >
> > -static void vlv_display_irq_uninstall(struct drm_i915_private *dev_priv)
> > -{
> > - /* Interrupt setup is already guaranteed to be single-threaded, this is
> > - * just to make the assert_spin_locked check happy. */
> > - spin_lock_irq(&dev_priv->irq_lock);
> > - if (dev_priv->display_irqs_enabled)
> > - valleyview_display_irqs_uninstall(dev_priv);
> > - spin_unlock_irq(&dev_priv->irq_lock);
> > -
> > - vlv_display_irq_reset(dev_priv);
> > -
> > - dev_priv->irq_mask = ~0;
> > -}
> > -
> > static void valleyview_irq_uninstall(struct drm_device *dev)
> > {
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > @@ -3921,7 +3863,9 @@ static void valleyview_irq_uninstall(struct drm_device *dev)
> >
> > I915_WRITE(HWSTAM, 0xffffffff);
> >
> > - vlv_display_irq_uninstall(dev_priv);
> > + spin_lock_irq(&dev_priv->irq_lock);
> > + vlv_display_irq_reset(dev_priv);
> > + spin_unlock_irq(&dev_priv->irq_lock);
> > }
> >
> > static void cherryview_irq_uninstall(struct drm_device *dev)
> > @@ -3938,7 +3882,9 @@ static void cherryview_irq_uninstall(struct drm_device *dev)
> >
> > GEN5_IRQ_RESET(GEN8_PCU_);
> >
> > - vlv_display_irq_uninstall(dev_priv);
> > + spin_lock_irq(&dev_priv->irq_lock);
> > + vlv_display_irq_reset(dev_priv);
> > + spin_unlock_irq(&dev_priv->irq_lock);
> > }
> >
> > static void ironlake_irq_uninstall(struct drm_device *dev)
--
Ville Syrjälä
Intel OTC
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