From: Damon Ding <damon.ding@rock-chips.com>
To: "Andrzej Hajda" <andrzej.hajda@intel.com>,
"Neil Armstrong" <neil.armstrong@linaro.org>,
"Robert Foss" <rfoss@kernel.org>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"David Airlie" <airlied@gmail.com>,
"Simona Vetter" <simona@ffwll.ch>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Sandy Huang" <hjc@rock-chips.com>,
"Heiko Stübner" <heiko@sntech.de>,
"Andy Yan" <andy.yan@rock-chips.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Jonas Karlman <jonas@kwiboo.se>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Luca Ceresoli <luca.ceresoli@bootlin.com>,
Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Sebastian Reichel <sebastian.reichel@collabora.com>,
dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
Damon Ding <damon.ding@rock-chips.com>
Subject: [PATCH v6 4/5] drm/bridge: analogix_dp: Add validation for samsung,lane-count property
Date: Tue, 7 Jul 2026 12:06:12 +0800 [thread overview]
Message-ID: <20260707040613.1992841-5-damon.ding@rock-chips.com> (raw)
In-Reply-To: <20260707040613.1992841-1-damon.ding@rock-chips.com>
Add validity check for samsung,lane-count to ensure DT-provided
lane count values are specification-compliant.
Suggested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
---
Changes in v5:
- Apply DRM DP helper API to check the validity of DP lane count.
Changes in v6:
- Rebase after the new commit for restoring mandatory properties
samsung,link-rate and samsung,lane-count.
---
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 5240efcd3861..039e076d2b8a 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1270,7 +1270,8 @@ static int analogix_dp_dt_parse_pdata(struct analogix_dp_device *dp)
return dev_err_probe(dp->dev, -EINVAL,
"Failed to get samsung,link-rate\n");
video_info->max_link_rate = val;
- if (of_property_read_u32(dp_node, "samsung,lane-count", &val))
+ if (of_property_read_u32(dp_node, "samsung,lane-count", &val) ||
+ !drm_dp_lane_count_is_valid(val))
return dev_err_probe(dp->dev, -EINVAL,
"Failed to get samsung,lane-count\n");
video_info->max_lane_count = val;
--
2.34.1
next prev parent reply other threads:[~2026-07-07 4:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-07 4:06 [PATCH v6 0/5] Add eDP lane mapping support Damon Ding
2026-07-07 4:06 ` [PATCH v6 1/5] dt-bindings: display: bridge: analogix-dp: Add data-lanes support for endpoint Damon Ding
2026-07-07 4:06 ` [PATCH v6 2/5] drm/dp: Add helper to validate DP lane counts Damon Ding
2026-07-07 4:06 ` [PATCH v6 3/5] drm/bridge: analogix_dp: Restore mandatory samsung DP DT properties Damon Ding
2026-07-07 4:06 ` Damon Ding [this message]
2026-07-07 4:06 ` [PATCH v6 5/5] drm/bridge: analogix_dp: Add support for optional data-lanes mapping Damon Ding
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