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From:   Dario Binacchi <dario.binacchi@amarulasolutions.com>
To:     linux-kernel@vger.kernel.org
Cc:     Amarula patchwork <linux-amarula@amarulasolutions.com>,
        michael@amarulasolutions.com,
        Dario Binacchi <dario.binacchi@amarulasolutions.com>,
        Andrzej Hajda <andrzej.hajda@intel.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Dave Stevenson <dave.stevenson@raspberrypi.com>,
        David Airlie <airlied@gmail.com>,
        Frieder Schrempf <frieder.schrempf@kontron.de>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Jonas Karlman <jonas@kwiboo.se>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <mripard@kernel.org>,
        Neil Armstrong <neil.armstrong@linaro.org>,
        Robert Foss <rfoss@kernel.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        dri-devel@lists.freedesktop.org
Subject: [PATCH v3 01/10] drm/bridge: Fix bridge disable logic
Date:   Thu, 30 Nov 2023 15:16:18 +0100
Message-ID: <20231130141705.1796672-2-dario.binacchi@amarulasolutions.com>
In-Reply-To: <20231130141705.1796672-1-dario.binacchi@amarulasolutions.com>
References: <20231130141705.1796672-1-dario.binacchi@amarulasolutions.com>
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As explained by the comment of the fixed code, we need to find the next
bridge that hasn't set the "pre_enable_prev_first" flag to true. The code,
on the contrary, was doing the opposite.
So, the order of disabling the bridges couldn't be altered as required
by setting the "pre_enable_prev_first" flag to true.

Fixes: 4fb912e5e190 ("drm/bridge: Introduce pre_enable_prev_first to alter bridge init order")
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 drivers/gpu/drm/drm_bridge.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 30d66bee0ec6..f66bf4925dd8 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -686,7 +686,7 @@ void drm_atomic_bridge_chain_post_disable(struct drm_bridge *bridge,
 				 */
 				list_for_each_entry_from(next, &encoder->bridge_chain,
 							 chain_node) {
-					if (next->pre_enable_prev_first) {
+					if (!next->pre_enable_prev_first) {
 						next = list_prev_entry(next, chain_node);
 						limit = next;
 						break;
-- 
2.43.0