From fee884ed285a110b665c00b07b134cd2616122bc Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Thu, 4 Jul 2013 23:35:21 +0200 Subject: [PATCH] drm/i915: extract ibx_display_interrupt_update This way all changes to SDEIMR all go through the same function, with the exception of the (single-threaded) setup/teardown code. For paranoia again add an assert_spin_locked. v2: For even more paranoia also sprinkle a spinlock assert over cpt_can_enable_serr_int since we need to have that one there, too. v3: Fix the logic of interrupt enabling, add enable/disable macros for the simple cases in the fifo code and add a comment. All requested by Paulo. Reviewed-by: Paulo Zanoni Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_irq.c | 51 +++++++++++++++++++++++++++++------------ 1 file changed, 36 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 4aedd38..80b88c8 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -128,6 +128,8 @@ static bool cpt_can_enable_serr_int(struct drm_device *dev) enum pipe pipe; struct intel_crtc *crtc; + assert_spin_locked(&dev_priv->irq_lock); + for_each_pipe(pipe) { crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]); @@ -170,6 +172,30 @@ static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev, } } +/** + * ibx_display_interrupt_update - update SDEIMR + * @dev_priv: driver private + * @interrupt_mask: mask of interrupt bits to update + * @enabled_irq_mask: mask of interrupt bits to enable + */ +static void ibx_display_interrupt_update(struct drm_i915_private *dev_priv, + uint32_t interrupt_mask, + uint32_t enabled_irq_mask) +{ + uint32_t sdeimr = I915_READ(SDEIMR); + sdeimr &= ~interrupt_mask; + sdeimr |= (~enabled_irq_mask & interrupt_mask); + + assert_spin_locked(&dev_priv->irq_lock); + + I915_WRITE(SDEIMR, sdeimr); + POSTING_READ(SDEIMR); +} +#define ibx_enable_display_interrupt(dev_priv, bits) \ + ibx_display_interrupt_update((dev_priv), (bits), (bits)) +#define ibx_disable_display_interrupt(dev_priv, bits) \ + ibx_display_interrupt_update((dev_priv), (bits), 0) + static void ibx_set_fifo_underrun_reporting(struct intel_crtc *crtc, bool enable) { @@ -179,11 +205,9 @@ static void ibx_set_fifo_underrun_reporting(struct intel_crtc *crtc, SDE_TRANSB_FIFO_UNDER; if (enable) - I915_WRITE(SDEIMR, I915_READ(SDEIMR) & ~bit); + ibx_enable_display_interrupt(dev_priv, bit); else - I915_WRITE(SDEIMR, I915_READ(SDEIMR) | bit); - - POSTING_READ(SDEIMR); + ibx_disable_display_interrupt(dev_priv, bit); } static void cpt_set_fifo_underrun_reporting(struct drm_device *dev, @@ -200,12 +224,10 @@ static void cpt_set_fifo_underrun_reporting(struct drm_device *dev, SERR_INT_TRANS_B_FIFO_UNDERRUN | SERR_INT_TRANS_C_FIFO_UNDERRUN); - I915_WRITE(SDEIMR, I915_READ(SDEIMR) & ~SDE_ERROR_CPT); + ibx_enable_display_interrupt(dev_priv, SDE_ERROR_CPT); } else { - I915_WRITE(SDEIMR, I915_READ(SDEIMR) | SDE_ERROR_CPT); + ibx_disable_display_interrupt(dev_priv, SDE_ERROR_CPT); } - - POSTING_READ(SDEIMR); } /** @@ -2652,22 +2674,21 @@ 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; struct intel_encoder *intel_encoder; - u32 mask = ~I915_READ(SDEIMR); - u32 hotplug; + u32 hotplug_irqs, hotplug, enabled_irqs = 0; if (HAS_PCH_IBX(dev)) { - mask &= ~SDE_HOTPLUG_MASK; + hotplug_irqs = SDE_HOTPLUG_MASK; list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head) if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED) - mask |= hpd_ibx[intel_encoder->hpd_pin]; + enabled_irqs |= hpd_ibx[intel_encoder->hpd_pin]; } else { - mask &= ~SDE_HOTPLUG_MASK_CPT; + hotplug_irqs = SDE_HOTPLUG_MASK_CPT; list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head) if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED) - mask |= hpd_cpt[intel_encoder->hpd_pin]; + enabled_irqs |= hpd_cpt[intel_encoder->hpd_pin]; } - I915_WRITE(SDEIMR, ~mask); + ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs); /* * Enable digital hotplug on the PCH, and configure the DP short pulse -- 2.7.4