linux-kernel - [PATCH 2/3] drm/ssd130x: Do not call drm_atomic_add_affected

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Date:   Mon, 10 Oct 2022 19:02:02 +0200
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Thomas Zimmermann <tzimmermann@...e.de>,
        Javier Martinez Canillas <javierm@...hat.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH 2/3] drm/ssd130x: Do not call drm_atomic_add_affected_planes()

There's no need to add planes to the atomic state. Remove the call
to drm_atomic_add_affected_planes() from ssd130x.

On full modesets, the DRM helpers already add a CRTC's planes to the
atomic state; see drm_atomic_helper_check_modeset(). There's no reason
to call drm_atomic_add_affected_planes() unconditionally in the CRTC's
atomic_check() in ssd130x. It's also too late, as the atomic_check()
of the added planes will not be called before the commit.

Suggested-by: Thomas Zimmermann <tzimmermann@...e.de>
Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
---

 drivers/gpu/drm/solomon/ssd130x.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/solomon/ssd130x.c b/drivers/gpu/drm/solomon/ssd130x.c
index 57e48355c008..0d4ab65233db 100644
--- a/drivers/gpu/drm/solomon/ssd130x.c
+++ b/drivers/gpu/drm/solomon/ssd130x.c
@@ -649,17 +649,11 @@ static int ssd130x_crtc_helper_atomic_check(struct drm_crtc *crtc,
 					    struct drm_atomic_state *new_state)
 {
 	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
-	int ret;
 
 	if (!new_crtc_state->enable)
-		goto out;
-
-	ret = drm_atomic_helper_check_crtc_primary_plane(new_crtc_state);
-	if (ret)
-		return ret;
+		return 0;
 
-out:
-	return drm_atomic_add_affected_planes(new_state, crtc);
+	return drm_atomic_helper_check_crtc_primary_plane(new_crtc_state);
 }
 
 /*
-- 
2.37.3