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drm/i915: Handle HPD when it has actually occurred 

Writing to PCH_PORT_HOTPLUG for each interrupt is not required.
Handle it only if hpd has actually occurred like we handle other
interrupts.
v2: Make few variables local to if block (Ville)
v3: Add check for ibx/cpt both (Ville).
    While at it, remove the redundant check for hotplug_trigger from
    pch_get_hpd_pins
v4: Indentation (Ville)

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Sonika Jindal 2015-07-08 17:07:47 +05:30 committed by Daniel Vetter
parent 8df5dd57fd
commit aaf5ec2e51
1 changed files with 17 additions and 15 deletions
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32
drivers/gpu/drm/i915/i915_irq.c
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@ -1266,9 +1266,6 @@ static void pch_get_hpd_pins(u32 *pin_mask, u32 *long_mask,
*pin_mask = 0;
*long_mask = 0;
if (!hotplug_trigger)
return;
for_each_hpd_pin(i) {
if ((hpd[i] & hotplug_trigger) == 0)
continue;
@ -1658,14 +1655,17 @@ static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
struct drm_i915_private *dev_priv = dev->dev_private;
int pipe;
u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
u32 dig_hotplug_reg;
u32 pin_mask, long_mask;
dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
if (hotplug_trigger) {
u32 dig_hotplug_reg, pin_mask, long_mask;
pch_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger, dig_hotplug_reg, hpd_ibx);
intel_hpd_irq_handler(dev, pin_mask, long_mask);
dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
pch_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
dig_hotplug_reg, hpd_ibx);
intel_hpd_irq_handler(dev, pin_mask, long_mask);
}
if (pch_iir & SDE_AUDIO_POWER_MASK) {
int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
@ -1757,14 +1757,16 @@ static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
struct drm_i915_private *dev_priv = dev->dev_private;
int pipe;
u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
u32 dig_hotplug_reg;
u32 pin_mask, long_mask;
dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
if (hotplug_trigger) {
u32 dig_hotplug_reg, pin_mask, long_mask;
pch_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger, dig_hotplug_reg, hpd_cpt);
intel_hpd_irq_handler(dev, pin_mask, long_mask);
dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
pch_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
dig_hotplug_reg, hpd_cpt);
intel_hpd_irq_handler(dev, pin_mask, long_mask);
}
if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>