Introduce a new helper function which calls mode_valid() callback
for all bridges in an encoder chain.
Signed-off-by: Jose Abreu <joabreu@xxxxxxxxxxxx>
Cc: Carlos Palminha <palminha@xxxxxxxxxxxx>
Cc: Alexey Brodkin <abrodkin@xxxxxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxx>
Cc: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
Cc: Archit Taneja <architt@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_bridge.c | 33 +++++++++++++++++++++++++++++++++
include/drm/drm_bridge.h | 2 ++
2 files changed, 35 insertions(+)
diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 86a7637..dc8cdfe 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -206,6 +206,39 @@ 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
*
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index 00c6c36..8358eb3 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -233,6 +233,8 @@ 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,
--
1.9.1
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