diff options
Diffstat (limited to 'drivers/gpu/drm/drm_bridge.c')
| -rw-r--r-- | drivers/gpu/drm/drm_bridge.c | 41 |
1 files changed, 37 insertions, 4 deletions
diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index a8ed66751c2d..4c68733fa660 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -28,6 +28,7 @@ #include <drm/drm_atomic_state_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_encoder.h> +#include <drm/drm_of.h> #include <drm/drm_print.h> #include "drm_crtc_internal.h" @@ -51,10 +52,8 @@ * * Display drivers are responsible for linking encoders with the first bridge * in the chains. This is done by acquiring the appropriate bridge with - * of_drm_find_bridge() or drm_of_find_panel_or_bridge(), or creating it for a - * panel with drm_panel_bridge_add_typed() (or the managed version - * devm_drm_panel_bridge_add_typed()). Once acquired, the bridge shall be - * attached to the encoder with a call to drm_bridge_attach(). + * devm_drm_of_get_bridge(). Once acquired, the bridge shall be attached to the + * encoder with a call to drm_bridge_attach(). * * Bridges are responsible for linking themselves with the next bridge in the * chain, if any. This is done the same way as for encoders, with the call to @@ -1233,6 +1232,40 @@ struct drm_bridge *of_drm_find_bridge(struct device_node *np) return NULL; } EXPORT_SYMBOL(of_drm_find_bridge); + +/** + * devm_drm_of_get_bridge - Return next bridge in the chain + * @dev: device to tie the bridge lifetime to + * @np: device tree node containing encoder output ports + * @port: port in the device tree node + * @endpoint: endpoint in the device tree node + * + * Given a DT node's port and endpoint number, finds the connected node + * and returns the associated bridge if any, or creates and returns a + * drm panel bridge instance if a panel is connected. + * + * Returns a pointer to the bridge if successful, or an error pointer + * otherwise. + */ +struct drm_bridge *devm_drm_of_get_bridge(struct device *dev, + struct device_node *np, + u32 port, u32 endpoint) +{ + struct drm_bridge *bridge; + struct drm_panel *panel; + int ret; + + ret = drm_of_find_panel_or_bridge(np, port, endpoint, + &panel, &bridge); + if (ret) + return ERR_PTR(ret); + + if (panel) + bridge = devm_drm_panel_bridge_add(dev, panel); + + return bridge; +} +EXPORT_SYMBOL(devm_drm_of_get_bridge); #endif MODULE_AUTHOR("Ajay Kumar <ajaykumar.rs@samsung.com>"); |