On Tue, 17 May 2016 08:47:11 +0200
Daniel Vetter <daniel@xxxxxxxx> wrote:
> > +static struct drm_encoder *sii902x_best_encoder(struct drm_connector *connector)
> > +{
> > + struct sii902x *sii902x = connector_to_sii902x(connector);
> > +
> > + return sii902x->bridge.encoder;
> > +}
>
> drm_atomic_helper_best_encoder should do exactly this for you. If you feel
> board pimp the atomic helpers to call that one by default to even remove
> the vfunc assingment line ;-)
Just to be sure, is that what you had in mind?
--->8---
>From d218b7ea16ca35452b3174c83a207ecd406e5c88 Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
Date: Wed, 1 Jun 2016 17:57:18 +0200
Subject: [PATCH] drm: atomic: Handle funcs->best_encoder == NULL case
Fallback drm_atomic_helper_best_encoder() is 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().
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_atomic_helper.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index ddfa0d1..f6a3350 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -110,8 +110,10 @@ static int handle_conflicting_encoders(struct drm_atomic_state *state,
if (funcs->atomic_best_encoder)
new_encoder = funcs->atomic_best_encoder(connector, conn_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) {
if (encoder_mask & (1 << drm_encoder_index(new_encoder))) {
--
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