On Wed, Mar 27, 2013 at 12:44:30AM +0100, Daniel Vetter wrote:
> Due to the irq setup rework in 3.9 Egbert's hpd rework blows up on
> pch-split platforms. The new init sequence is:
>
> - irq enabling
> - modeset init
> - hpd setup
>
> We need to move around the ibx setup a bit to fix this.
>
> This needs to be squashed into a commit on dinq.
>
> Cc: Egbert Eich <[email protected]>
> Cc: Jesse Barnes <[email protected]>
> Signed-off-by: Daniel Vetter <[email protected]>
> ---
> drivers/gpu/drm/i915/i915_irq.c | 21 ++++++++++++++++++---
> 1 file changed, 18 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index 43436e0..1279a44 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -2084,7 +2084,7 @@ static void ibx_enable_hotplug(struct drm_device *dev)
> I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
> }
>
> -static void ibx_irq_postinstall(struct drm_device *dev)
> +static void ibx_hpd_irq_setup(struct drm_device *dev)
> {
> drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
> struct drm_mode_config *mode_config = &dev->mode_config;
> @@ -2095,12 +2095,10 @@ static void ibx_irq_postinstall(struct drm_device
> *dev)
> mask &= ~SDE_HOTPLUG_MASK;
> list_for_each_entry(intel_encoder, &mode_config->encoder_list,
> base.head)
> mask |= hpd_ibx[intel_encoder->hpd_pin];
> - mask |= SDE_GMBUS | SDE_AUX_MASK;
> } else {
> mask &= ~SDE_HOTPLUG_MASK_CPT;
> list_for_each_entry(intel_encoder, &mode_config->encoder_list,
> base.head)
> mask |= hpd_cpt[intel_encoder->hpd_pin];
> - mask |= SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
> }
> I915_WRITE(SDEIIR, I915_READ(SDEIIR));
> I915_WRITE(SDEIMR, ~mask);
> @@ -2110,6 +2108,21 @@ static void ibx_irq_postinstall(struct drm_device *dev)
> ibx_enable_hotplug(dev);
> }
>
> +static void ibx_irq_postinstall(struct drm_device *dev)
> +{
> + drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
> + u32 mask = I915_READ(SDEIER);
> +
> + if (HAS_PCH_IBX(dev))
> + mask |= SDE_GMBUS | SDE_AUX_MASK;
> + else
> + mask |= SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
> + I915_WRITE(SDEIIR, I915_READ(SDEIIR));
> + I915_WRITE(SDEIMR, ~mask);
> + I915_WRITE(SDEIER, mask);
> + POSTING_READ(SDEIER);
> +}
Should we clear just the HPD bits here? Then again, I suppose
enable_hotplug_processing should make sure we don't do aux/gmbus
transfers at the same time, so maybe it doesn't matter.
But now I started to wondee what are chances that we'd get
some other interrupt while executing this function. That
could lead to a corrupted SDEIER now that the irq handler
touches it as well.
> +
> static int ironlake_irq_postinstall(struct drm_device *dev)
> {
> drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
> @@ -2960,6 +2973,7 @@ void intel_irq_init(struct drm_device *dev)
> dev->driver->irq_uninstall = ironlake_irq_uninstall;
> dev->driver->enable_vblank = ivybridge_enable_vblank;
> dev->driver->disable_vblank = ivybridge_disable_vblank;
> + dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
> } else if (HAS_PCH_SPLIT(dev)) {
> dev->driver->irq_handler = ironlake_irq_handler;
> dev->driver->irq_preinstall = ironlake_irq_preinstall;
> @@ -2967,6 +2981,7 @@ void intel_irq_init(struct drm_device *dev)
> dev->driver->irq_uninstall = ironlake_irq_uninstall;
> dev->driver->enable_vblank = ironlake_enable_vblank;
> dev->driver->disable_vblank = ironlake_disable_vblank;
> + dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
> } else {
> if (INTEL_INFO(dev)->gen == 2) {
> dev->driver->irq_preinstall = i8xx_irq_preinstall;
> --
> 1.7.11.7
>
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--
Ville Syrjälä
Intel OTC
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