drm/atomic: Fix remaining places where !funcs->best_encoder is valid
Adapt drm_pick_crtcs() and update_connector_routing() to fallback to
drm_atomic_helper_best_encoder() if funcs->best_encoder() is NULL so
that DRM drivers can leave this hook unassigned if they know they want
to use drm_atomic_helper_best_encoder().
Update the vtables documentation accordingly.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465300095-16971-2-git-send-email-boris.brezillon@free-electrons.com
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 191d84f..bb98d74 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -300,8 +300,10 @@
if (funcs->atomic_best_encoder)
new_encoder = funcs->atomic_best_encoder(connector,
connector_state);
- else
+ else if (funcs->best_encoder)
new_encoder = funcs->best_encoder(connector);
+ else
+ new_encoder = drm_atomic_helper_best_encoder(connector);
if (!new_encoder) {
DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n",
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 58ed6e6..ba5aac7 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -1971,7 +1971,18 @@
my_score++;
connector_funcs = connector->helper_private;
- encoder = connector_funcs->best_encoder(connector);
+
+ /*
+ * If the DRM device implements atomic hooks and ->best_encoder() is
+ * NULL we fallback to the default drm_atomic_helper_best_encoder()
+ * helper.
+ */
+ if (fb_helper->dev->mode_config.funcs->atomic_commit &&
+ !connector_funcs->best_encoder)
+ encoder = drm_atomic_helper_best_encoder(connector);
+ else
+ encoder = connector_funcs->best_encoder(connector);
+
if (!encoder)
goto out;
diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h
index d4619dc..4e7a53b 100644
--- a/include/drm/drm_modeset_helper_vtables.h
+++ b/include/drm/drm_modeset_helper_vtables.h
@@ -736,6 +736,11 @@
* inspect dynamic configuration state should instead use
* @atomic_best_encoder.
*
+ * You can leave this function to NULL if the connector is only
+ * attached to a single encoder and you are using the atomic helpers.
+ * In this case, the core will call drm_atomic_helper_best_encoder()
+ * for you.
+ *
* RETURNS:
*
* Encoder that should be used for the given connector and connector
@@ -752,8 +757,9 @@
* need to select the best encoder depending upon the desired
* configuration and can't select it statically.
*
- * This function is used by drm_atomic_helper_check_modeset() and either
- * this or @best_encoder is required.
+ * This function is used by drm_atomic_helper_check_modeset().
+ * If it is not implemented, the core will fallback to @best_encoder
+ * (or drm_atomic_helper_best_encoder() if @best_encoder is NULL).
*
* NOTE:
*