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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
This commit is contained in:
Jose Abreu 2017-05-25 15:19:14 +01:00 committed by Daniel Vetter
parent da251bf8f9
commit b1240f81a1
2 changed files with 35 additions and 0 deletions
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33
drivers/gpu/drm/drm_bridge.c
View File

@ -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

2
include/drm/drm_bridge.h
View File

@ -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,