diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2015-08-28 21:26:27 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-09-02 17:51:29 +0300 |
| commit | 42db67d664af417e946211c7f1f4178c782a582a (patch) | |
| tree | a5848142522aa37c5b4444e235d8ea3f75bfaead /drivers/gpu/drm/i915/i915_irq.c | |
| parent | 195baa0673345c70f04d19e9e18470c9cbf88bcf (diff) | |
| download | linux-42db67d664af417e946211c7f1f4178c782a582a.tar.xz | |
drm/i915: Move {pin, long}_mask initialization to caller from intel_get_hpd_pins()
Move the 0 initialization of pin_mask and long_mask from
intel_get_hpd_pins() into each caller. This we we can call
intel_get_hpd_pins() multiple times to accumulate more pins from several
sources.
v2: Add a comment explaining the dangers of intel_get_hpd_pins() (Paulo)
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_irq.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 3388b6475058..71293893482a 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1292,7 +1292,13 @@ static bool i9xx_port_hotplug_long_detect(enum port port, u32 val) } } -/* Get a bit mask of pins that have triggered, and which ones may be long. */ +/* + * Get a bit mask of pins that have triggered, and which ones may be long. + * This can be called multiple times with the same masks to accumulate + * hotplug detection results from several registers. + * + * Note that the caller is expected to zero out the masks initially. + */ static void intel_get_hpd_pins(u32 *pin_mask, u32 *long_mask, u32 hotplug_trigger, u32 dig_hotplug_reg, const u32 hpd[HPD_NUM_PINS], @@ -1301,9 +1307,6 @@ static void intel_get_hpd_pins(u32 *pin_mask, u32 *long_mask, enum port port; int i; - *pin_mask = 0; - *long_mask = 0; - for_each_hpd_pin(i) { if ((hpd[i] & hotplug_trigger) == 0) continue; @@ -1544,7 +1547,7 @@ static void i9xx_hpd_irq_handler(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); - u32 pin_mask, long_mask; + u32 pin_mask = 0, long_mask = 0; if (!hotplug_status) return; @@ -1673,7 +1676,7 @@ static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir) u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK; if (hotplug_trigger) { - u32 dig_hotplug_reg, pin_mask, long_mask; + u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0; dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG); I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg); @@ -1781,7 +1784,7 @@ static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir) hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT; if (hotplug_trigger) { - u32 dig_hotplug_reg, pin_mask, long_mask; + u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0; dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG); I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg); @@ -2004,7 +2007,7 @@ static void bxt_hpd_handler(struct drm_device *dev, uint32_t iir_status) { struct drm_i915_private *dev_priv = dev->dev_private; u32 hp_control, hp_trigger; - u32 pin_mask, long_mask; + u32 pin_mask = 0, long_mask = 0; /* Get the status */ hp_trigger = iir_status & BXT_DE_PORT_HOTPLUG_MASK; |