diff options
| author | Daniel Kurtz <djkurtz@chromium.org> | 2012-03-27 20:36:14 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-03-28 14:40:44 +0200 |
| commit | 3bd7d90938f1fe77de5991dc4b727843c4980b2a (patch) | |
| tree | a3ae0f53674b8a95b8e2c52959e32b4cc7a43d09 /drivers/gpu/drm/i915/intel_dvo.c | |
| parent | drm/i915/intel_i2c: use i2c pre/post_xfer functions to setup gpio xfers (diff) | |
| download | linux-3bd7d90938f1fe77de5991dc4b727843c4980b2a.tar.xz linux-3bd7d90938f1fe77de5991dc4b727843c4980b2a.zip | |
drm/i915/intel_i2c: refactor using intel_gmbus_get_adapter
Instead of letting other modules directly access the ->gmbus array,
introduce intel_gmbus_get_adapter() for looking up an i2c_adapter
for a given gmbus port identifier. This will enable later refactoring
of the gmbus port list.
Note: Before requesting an adapter for a given gmbus port number, the
driver must first check its validity using i2c_intel_gmbus_is_port_valid().
If this check fails, a call to intel_gmbus_get_adapter() will WARN_ON and
return NULL. This is relevant for parts of the driver that read a port
from VBIOS, which might be improperly initialized and contain an invalid
port. In these cases, the driver must fall back to using a safer default
port.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dvo.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dvo.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c index 020a7d7f744d..60ba50b956f2 100644 --- a/drivers/gpu/drm/i915/intel_dvo.c +++ b/drivers/gpu/drm/i915/intel_dvo.c @@ -243,7 +243,7 @@ static int intel_dvo_get_modes(struct drm_connector *connector) * that's not the case. */ intel_ddc_get_modes(connector, - &dev_priv->gmbus[GMBUS_PORT_DPC].adapter); + intel_gmbus_get_adapter(dev_priv, GMBUS_PORT_DPC)); if (!list_empty(&connector->probed_modes)) return 1; @@ -375,7 +375,7 @@ void intel_dvo_init(struct drm_device *dev) * special cases, but otherwise default to what's defined * in the spec. */ - if (dvo->gpio != 0) + if (intel_gmbus_is_port_valid(dvo->gpio)) gpio = dvo->gpio; else if (dvo->type == INTEL_DVO_CHIP_LVDS) gpio = GMBUS_PORT_SSC; @@ -386,7 +386,7 @@ void intel_dvo_init(struct drm_device *dev) * It appears that everything is on GPIOE except for panels * on i830 laptops, which are on GPIOB (DVOA). */ - i2c = &dev_priv->gmbus[gpio].adapter; + i2c = intel_gmbus_get_adapter(dev_priv, gpio); intel_dvo->dev = *dvo; if (!dvo->dev_ops->init(&intel_dvo->dev, i2c)) |