forked from Minki/linux
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: Jose Abreu <joabreu@synopsys.com> Reviewed-by: Daniel 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: Archit Taneja <architt@codeaurora.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/36bd5e054496ad3c9c71f1ffe204f28533f55f1e.1495720737.git.joabreu@synopsys.com
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@ -205,6 +205,39 @@ bool drm_bridge_mode_fixup(struct drm_bridge *bridge,
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}
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EXPORT_SYMBOL(drm_bridge_mode_fixup);
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/**
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* drm_bridge_mode_valid - validate the mode against all bridges in the
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* encoder chain.
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* @bridge: bridge control structure
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* @mode: desired mode to be validated
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*
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* Calls &drm_bridge_funcs.mode_valid for all the bridges in the encoder
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* chain, starting from the first bridge to the last. If at least one bridge
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* does not accept the mode the function returns the error code.
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*
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* Note: the bridge passed should be the one closest to the encoder.
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*
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* RETURNS:
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* MODE_OK on success, drm_mode_status Enum error code on failure
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*/
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enum drm_mode_status drm_bridge_mode_valid(struct drm_bridge *bridge,
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const struct drm_display_mode *mode)
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{
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enum drm_mode_status ret = MODE_OK;
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if (!bridge)
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return ret;
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if (bridge->funcs->mode_valid)
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ret = bridge->funcs->mode_valid(bridge, mode);
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if (ret != MODE_OK)
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return ret;
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return drm_bridge_mode_valid(bridge->next, mode);
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}
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EXPORT_SYMBOL(drm_bridge_mode_valid);
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/**
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* drm_bridge_disable - disables all bridges in the encoder chain
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* @bridge: bridge control structure
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@ -253,6 +253,8 @@ int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
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bool drm_bridge_mode_fixup(struct drm_bridge *bridge,
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const struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode);
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enum drm_mode_status drm_bridge_mode_valid(struct drm_bridge *bridge,
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const struct drm_display_mode *mode);
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void drm_bridge_disable(struct drm_bridge *bridge);
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void drm_bridge_post_disable(struct drm_bridge *bridge);
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void drm_bridge_mode_set(struct drm_bridge *bridge,
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