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drm/i915: make g4x_digital_port_connected return boolean status

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We should not be hitting any of the default cases in
g4x_digital_port_connected, so add MISSING_CASE annotation and return
boolean status. The current behaviour is just cargo culting from the
days of yonder when the display port support was added to i915.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jani Nikula 2015-08-20 10:47:37 +03:00 committed by Daniel Vetter
parent b93433ccf6
commit 1d24598775
1 changed files with 11 additions and 15 deletions
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26
drivers/gpu/drm/i915/intel_dp.c
View file

@ -4525,14 +4525,14 @@ static bool ibx_digital_port_connected(struct drm_i915_private *dev_priv,
return I915_READ(SDEISR) & bit;
}
static int g4x_digital_port_connected(struct drm_device *dev,
struct intel_digital_port *intel_dig_port)
static bool g4x_digital_port_connected(struct drm_device *dev,
struct intel_digital_port *port)
{
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t bit;
if (IS_VALLEYVIEW(dev)) {
switch (intel_dig_port->port) {
switch (port->port) {
case PORT_B:
bit = PORTB_HOTPLUG_LIVE_STATUS_VLV;
break;
@ -4543,10 +4543,11 @@ static int g4x_digital_port_connected(struct drm_device *dev,
bit = PORTD_HOTPLUG_LIVE_STATUS_VLV;
break;
default:
return -EINVAL;
MISSING_CASE(port->port);
return false;
}
} else {
switch (intel_dig_port->port) {
switch (port->port) {
case PORT_B:
bit = PORTB_HOTPLUG_LIVE_STATUS_G4X;
break;
@ -4557,13 +4558,12 @@ static int g4x_digital_port_connected(struct drm_device *dev,
bit = PORTD_HOTPLUG_LIVE_STATUS_G4X;
break;
default:
return -EINVAL;
MISSING_CASE(port->port);
return false;
}
}
if ((I915_READ(PORT_HOTPLUG_STAT) & bit) == 0)
return 0;
return 1;
return I915_READ(PORT_HOTPLUG_STAT) & bit;
}
static enum drm_connector_status
@ -4584,7 +4584,6 @@ g4x_dp_detect(struct intel_dp *intel_dp)
{
struct drm_device *dev = intel_dp_to_dev(intel_dp);
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
int ret;
/* Can't disconnect eDP, but you can close the lid... */
if (is_edp(intel_dp)) {
@ -4596,10 +4595,7 @@ g4x_dp_detect(struct intel_dp *intel_dp)
return status;
}
ret = g4x_digital_port_connected(dev, intel_dig_port);
if (ret == -EINVAL)
return connector_status_unknown;
else if (ret == 0)
if (!g4x_digital_port_connected(dev, intel_dig_port))
return connector_status_disconnected;
return intel_dp_detect_dpcd(intel_dp);
@ -5066,7 +5062,7 @@ intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
if (!ibx_digital_port_connected(dev_priv, intel_dig_port))
goto mst_fail;
} else {
if (g4x_digital_port_connected(dev, intel_dig_port) != 1)
if (!g4x_digital_port_connected(dev, intel_dig_port))
goto mst_fail;
}