Commit b1240f81 authored by Jose Abreu's avatar Jose Abreu Committed by Daniel Vetter
Browse files

drm: Introduce drm_bridge_mode_valid() 



Introduce a new helper function which calls mode_valid() callback
for all bridges in an encoder chain.

Signed-off-by: default avatarJose Abreu <joabreu@synopsys.com>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Cc: Carlos Palminha <palminha@synopsys.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Dave Airlie <airlied@linux.ie>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: default avatarArchit Taneja <architt@codeaurora.org>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/36bd5e054496ad3c9c71f1ffe204f28533f55f1e.1495720737.git.joabreu@synopsys.com
parent da251bf8

drivers/gpu/drm/drm_bridge.c

+33 −0
Original line number Diff line number Diff line
@@ -205,6 +205,39 @@ bool drm_bridge_mode_fixup(struct drm_bridge *bridge, 
}

EXPORT_SYMBOL(drm_bridge_mode_fixup);



/**

 * drm_bridge_mode_valid - validate the mode against all bridges in the

 * 			   encoder chain.

 * @bridge: bridge control structure

 * @mode: desired mode to be validated

 *

 * Calls &drm_bridge_funcs.mode_valid for all the bridges in the encoder

 * chain, starting from the first bridge to the last. If at least one bridge

 * does not accept the mode the function returns the error code.

 *

 * Note: the bridge passed should be the one closest to the encoder.

 *

 * RETURNS:

 * MODE_OK on success, drm_mode_status Enum error code on failure

 */

enum drm_mode_status drm_bridge_mode_valid(struct drm_bridge *bridge,

					   const struct drm_display_mode *mode)

{

	enum drm_mode_status ret = MODE_OK;



	if (!bridge)

		return ret;



	if (bridge->funcs->mode_valid)

		ret = bridge->funcs->mode_valid(bridge, mode);



	if (ret != MODE_OK)

		return ret;



	return drm_bridge_mode_valid(bridge->next, mode);

}

EXPORT_SYMBOL(drm_bridge_mode_valid);



/**

 * drm_bridge_disable - disables all bridges in the encoder chain

 * @bridge: bridge control structure

include/drm/drm_bridge.h

+2 −0
Original line number Diff line number Diff line
@@ -253,6 +253,8 @@ int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge, 
bool drm_bridge_mode_fixup(struct drm_bridge *bridge,

			const struct drm_display_mode *mode,

			struct drm_display_mode *adjusted_mode);

enum drm_mode_status drm_bridge_mode_valid(struct drm_bridge *bridge,

					   const struct drm_display_mode *mode);

void drm_bridge_disable(struct drm_bridge *bridge);

void drm_bridge_post_disable(struct drm_bridge *bridge);

void drm_bridge_mode_set(struct drm_bridge *bridge,

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