linux-kernel - [PATCH v5 2/4] drm/bridge: microchip-lvds: migrate to atomic bridge ops

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Message-ID: <20250625-microchip-lvds-v5-2-624cf72b2651@microchip.com>
Date: Wed, 25 Jun 2025 10:26:10 +0530
From: Dharma Balasubiramani <dharma.b@...rochip.com>
To: Manikandan Muralidharan <manikandan.m@...rochip.com>, Andrzej Hajda
	<andrzej.hajda@...el.com>, Neil Armstrong <neil.armstrong@...aro.org>,
	"Robert Foss" <rfoss@...nel.org>, Laurent Pinchart
	<Laurent.pinchart@...asonboard.com>, Jonas Karlman <jonas@...boo.se>, "Jernej
 Skrabec" <jernej.skrabec@...il.com>, Maarten Lankhorst
	<maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>
CC: <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>, "Dharma
 Balasubiramani" <dharma.b@...rochip.com>
Subject: [PATCH v5 2/4] drm/bridge: microchip-lvds: migrate to atomic
 bridge ops

Replace legacy .enable and .disable callbacks with their atomic
counterparts .atomic_enable and .atomic_disable.

Also, add turn off the serialiser inside atomic_disable().

Signed-off-by: Dharma Balasubiramani <dharma.b@...rochip.com>
---
 drivers/gpu/drm/bridge/microchip-lvds.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/microchip-lvds.c b/drivers/gpu/drm/bridge/microchip-lvds.c
index 06d4169a2d8f..c40c8717f026 100644
--- a/drivers/gpu/drm/bridge/microchip-lvds.c
+++ b/drivers/gpu/drm/bridge/microchip-lvds.c
@@ -111,7 +111,8 @@ static int mchp_lvds_attach(struct drm_bridge *bridge,
 				 bridge, flags);
 }
 
-static void mchp_lvds_enable(struct drm_bridge *bridge)
+static void mchp_lvds_atomic_enable(struct drm_bridge *bridge,
+				    struct drm_atomic_state *state)
 {
 	struct mchp_lvds *lvds = bridge_to_lvds(bridge);
 	int ret;
@@ -131,18 +132,22 @@ static void mchp_lvds_enable(struct drm_bridge *bridge)
 	lvds_serialiser_on(lvds);
 }
 
-static void mchp_lvds_disable(struct drm_bridge *bridge)
+static void mchp_lvds_atomic_disable(struct drm_bridge *bridge,
+				     struct drm_atomic_state *state)
 {
 	struct mchp_lvds *lvds = bridge_to_lvds(bridge);
 
+	/* Turn off the serialiser */
+	lvds_writel(lvds, LVDSC_CR, 0);
+
 	pm_runtime_put(lvds->dev);
 	clk_disable_unprepare(lvds->pclk);
 }
 
 static const struct drm_bridge_funcs mchp_lvds_bridge_funcs = {
 	.attach = mchp_lvds_attach,
-	.enable = mchp_lvds_enable,
-	.disable = mchp_lvds_disable,
+	.atomic_enable = mchp_lvds_atomic_enable,
+	.atomic_disable = mchp_lvds_atomic_disable,
 };
 
 static int mchp_lvds_probe(struct platform_device *pdev)

-- 
2.43.0