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| author | Rob Herring <robh@kernel.org> | 2017-03-22 08:26:05 -0500 |
|---|---|---|
| committer | Sean Paul <seanpaul@chromium.org> | 2017-04-06 17:00:27 -0400 |
| commit | 1f2db3034c9f16ed918e34809167546f21d0fcb4 (patch) | |
| tree | 327a2d7a070f91fd7a49aa2344c5ec1209df6e5d /include/drm/drm_of.h | |
| parent | b61c8d5d9a27715dd31781910aef12be4882ebfd (diff) | |
| download | lwn-1f2db3034c9f16ed918e34809167546f21d0fcb4.tar.gz lwn-1f2db3034c9f16ed918e34809167546f21d0fcb4.zip | |
drm: of: introduce drm_of_find_panel_or_bridge
Many drivers have a common pattern of searching the OF graph for either an
attached panel or bridge and then finding the DRM struct for the panel
or bridge. Also, most drivers need to handle deferred probing when the
DRM device is not yet instantiated. Create a common function,
drm_of_find_panel_or_bridge, to find the connected node and the
associated DRM panel or bridge device.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
[seanpaul dropped extern from drm_of.h]
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Diffstat (limited to 'include/drm/drm_of.h')
| -rw-r--r-- | include/drm/drm_of.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h index d1fc563f068a..104dd517fdbe 100644 --- a/include/drm/drm_of.h +++ b/include/drm/drm_of.h @@ -8,6 +8,8 @@ struct component_match; struct device; struct drm_device; struct drm_encoder; +struct drm_panel; +struct drm_bridge; struct device_node; #ifdef CONFIG_OF @@ -23,6 +25,10 @@ int drm_of_component_probe(struct device *dev, int drm_of_encoder_active_endpoint(struct device_node *node, struct drm_encoder *encoder, struct of_endpoint *endpoint); +int drm_of_find_panel_or_bridge(const struct device_node *np, + int port, int endpoint, + struct drm_panel **panel, + struct drm_bridge **bridge); #else static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, struct device_node *port) @@ -52,6 +58,13 @@ static inline int drm_of_encoder_active_endpoint(struct device_node *node, { return -EINVAL; } +static inline int drm_of_find_panel_or_bridge(const struct device_node *np, + int port, int endpoint, + struct drm_panel **panel, + struct drm_bridge **bridge) +{ + return -EINVAL; +} #endif static inline int drm_of_encoder_active_endpoint_id(struct device_node *node, |