[FOR CI 02/22] drm/atomic-helper: Unexport drm_atomic_helper_best_encoder

[Daniel Vetter <daniel.vetter@ffwll.ch>]

It's the default. The exported version was kinda a transition state,
before we made this the default.

To stop new atomic drivers from using it (instead of just relying on
the default) let's unexport it.

v2: rename the default implementation to a more fitting name and add a
comment (Laurent)

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Gustavo Padovan <gustavo@padovan.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: David Airlie <airlied@linux.ie>
Cc: VMware Graphics <linux-graphics-maintainer@vmware.com>
Cc: Sinclair Yeh <syeh@vmware.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Hans Verkuil <hverkuil@xs4all.nl>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Pierre-Hugues Husson <phh@phh.me>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c |  1 -
 drivers/gpu/drm/drm_atomic_helper.c       | 32 +++++++++--------------
 drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c       |  1 -
 drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c      |  1 -
 drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c      |  1 -
 include/drm/drm_atomic_helper.h           |  2 --
 6 files changed, 13 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index ac37c50d6c4b..5ac979d3450b 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1957,7 +1957,6 @@ static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
 
 static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
 	.get_modes = dw_hdmi_connector_get_modes,
-	.best_encoder = drm_atomic_helper_best_encoder,
 };
 
 static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index f92b7cf4cbd7..3be6c93be0f0 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -92,6 +92,17 @@ drm_atomic_helper_plane_changed(struct drm_atomic_state *state,
 	}
 }
 
+/*
+ * For connectors that support multiple encoders, either the
+ * .atomic_best_encoder() or .best_encoder() operation must be implemented.
+ */
+static struct drm_encoder *
+pick_single_encoder_for_connector(struct drm_connector *connector)
+{
+	WARN_ON(connector->encoder_ids[1]);
+	return drm_encoder_find(connector->dev, NULL, connector->encoder_ids[0]);
+}
+
 static int handle_conflicting_encoders(struct drm_atomic_state *state,
 				       bool disable_conflicting_encoders)
 {
@@ -119,7 +130,7 @@ static int handle_conflicting_encoders(struct drm_atomic_state *state,
 		else if (funcs->best_encoder)
 			new_encoder = funcs->best_encoder(connector);
 		else
-			new_encoder = drm_atomic_helper_best_encoder(connector);
+			new_encoder = pick_single_encoder_for_connector(connector);
 
 		if (new_encoder) {
 			if (encoder_mask & drm_encoder_mask(new_encoder)) {
@@ -316,7 +327,7 @@ update_connector_routing(struct drm_atomic_state *state,
 	else if (funcs->best_encoder)
 		new_encoder = funcs->best_encoder(connector);
 	else
-		new_encoder = drm_atomic_helper_best_encoder(connector);
+		new_encoder = pick_single_encoder_for_connector(connector);
 
 	if (!new_encoder) {
 		DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n",
@@ -3376,23 +3387,6 @@ int drm_atomic_helper_page_flip_target(struct drm_crtc *crtc,
 }
 EXPORT_SYMBOL(drm_atomic_helper_page_flip_target);
 
-/**
- * drm_atomic_helper_best_encoder - Helper for
- * 	&drm_connector_helper_funcs.best_encoder callback
- * @connector: Connector control structure
- *
- * This is a &drm_connector_helper_funcs.best_encoder callback helper for
- * connectors that support exactly 1 encoder, statically determined at driver
- * init time.
- */
-struct drm_encoder *
-drm_atomic_helper_best_encoder(struct drm_connector *connector)
-{
-	WARN_ON(connector->encoder_ids[1]);
-	return drm_encoder_find(connector->dev, NULL, connector->encoder_ids[0]);
-}
-EXPORT_SYMBOL(drm_atomic_helper_best_encoder);
-
 /**
  * DOC: atomic state reset and initialization
  *
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
index 723578117191..4b5378495eea 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
@@ -274,7 +274,6 @@ static const struct drm_connector_funcs vmw_legacy_connector_funcs = {
 
 static const struct
 drm_connector_helper_funcs vmw_ldu_connector_helper_funcs = {
-	.best_encoder = drm_atomic_helper_best_encoder,
 };
 
 /*
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
index 53316b1bda3d..333418dc259f 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
@@ -389,7 +389,6 @@ static const struct drm_connector_funcs vmw_sou_connector_funcs = {
 
 static const struct
 drm_connector_helper_funcs vmw_sou_connector_helper_funcs = {
-	.best_encoder = drm_atomic_helper_best_encoder,
 };
 
 
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c b/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
index e086565c1da6..c3e435f444c1 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
@@ -1054,7 +1054,6 @@ static const struct drm_connector_funcs vmw_stdu_connector_funcs = {
 
 static const struct
 drm_connector_helper_funcs vmw_stdu_connector_helper_funcs = {
-	.best_encoder = drm_atomic_helper_best_encoder,
 };
 
 
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index 657af7b39379..e60c4f0f8827 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -144,8 +144,6 @@ int drm_atomic_helper_page_flip_target(
 				uint32_t flags,
 				uint32_t target,
 				struct drm_modeset_acquire_ctx *ctx);
-struct drm_encoder *
-drm_atomic_helper_best_encoder(struct drm_connector *connector);
 
 /* default implementations for state handling */
 void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
-- 
2.19.0.rc2

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