linux-kernel - [PATCH] drm/of: Consider the state in which the ep is disabled

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Message-Id: <20200706075944.11558-1-hjc@rock-chips.com>
Date:   Mon,  6 Jul 2020 15:59:44 +0800
From:   Sandy Huang <hjc@...k-chips.com>
To:     heiko@...ech.de,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     huangtao@...k-chips.com, andy.yan@...k-chips.com,
        kever.yang@...k-chips.com, Sandy Huang <hjc@...k-chips.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/of: Consider the state in which the ep is disabled

don't mask possible_crtcs if remote-point is disabled.

Signed-off-by: Sandy Huang <hjc@...k-chips.com>
---
 drivers/gpu/drm/drm_of.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c
index fdb05fbf72a0..f5f250435add 100644
--- a/drivers/gpu/drm/drm_of.c
+++ b/drivers/gpu/drm/drm_of.c
@@ -66,6 +66,11 @@ uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
 	uint32_t possible_crtcs = 0;
 
 	for_each_endpoint_of_node(port, ep) {
+		if (!of_device_is_available(ep)) {
+			of_node_put(ep);
+			continue;
+		}
+
 		remote_port = of_graph_get_remote_port(ep);
 		if (!remote_port) {
 			of_node_put(ep);
-- 
2.17.1