diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_i2c.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c index ff47a8fdcb6d..ec9cc8cf642e 100644 --- a/drivers/gpu/drm/i915/intel_i2c.c +++ b/drivers/gpu/drm/i915/intel_i2c.c @@ -49,6 +49,12 @@ static const struct gmbus_pin gmbus_pins[] = { [GMBUS_PIN_DPD] = { "dpd", GPIOF }, }; +bool intel_gmbus_is_valid_pin(struct drm_i915_private *dev_priv, + unsigned int pin) +{ + return pin < ARRAY_SIZE(gmbus_pins) && gmbus_pins[pin].reg; +} + /* Intel GPIO access functions */ #define I2C_RISEFALL_TIME 10 @@ -534,7 +540,7 @@ int intel_setup_gmbus(struct drm_device *dev) init_waitqueue_head(&dev_priv->gmbus_wait_queue); for (pin = 0; pin < ARRAY_SIZE(dev_priv->gmbus); pin++) { - if (!intel_gmbus_is_valid_pin(pin)) + if (!intel_gmbus_is_valid_pin(dev_priv, pin)) continue; bus = &dev_priv->gmbus[pin]; @@ -571,7 +577,7 @@ int intel_setup_gmbus(struct drm_device *dev) err: while (--pin) { - if (!intel_gmbus_is_valid_pin(pin)) + if (!intel_gmbus_is_valid_pin(dev_priv, pin)) continue; bus = &dev_priv->gmbus[pin]; @@ -583,7 +589,7 @@ err: struct i2c_adapter *intel_gmbus_get_adapter(struct drm_i915_private *dev_priv, unsigned int pin) { - if (WARN_ON(!intel_gmbus_is_valid_pin(pin))) + if (WARN_ON(!intel_gmbus_is_valid_pin(dev_priv, pin))) return NULL; return &dev_priv->gmbus[pin].adapter; @@ -613,7 +619,7 @@ void intel_teardown_gmbus(struct drm_device *dev) unsigned int pin; for (pin = 0; pin < ARRAY_SIZE(dev_priv->gmbus); pin++) { - if (!intel_gmbus_is_valid_pin(pin)) + if (!intel_gmbus_is_valid_pin(dev_priv, pin)) continue; bus = &dev_priv->gmbus[pin]; |