linux-kernel - [PATCH v6 05/21] drm/bridge: lt8912b: Switch to devm MIPI-DSI helpers

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Message-Id: <20211025151536.1048186-6-maxime@cerno.tech>
Date:   Mon, 25 Oct 2021 17:15:20 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Thierry Reding <thierry.reding@...il.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Robert Foss <robert.foss@...aro.org>,
        Jonas Karlman <jonas@...boo.se>,
        Daniel Vetter <daniel.vetter@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Maxime Ripard <maxime@...no.tech>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Neil Armstrong <narmstrong@...libre.com>
Cc:     Seung-Woo Kim <sw0312.kim@...sung.com>,
        linux-arm-msm@...r.kernel.org,
        Joonyoung Shim <jy0922.shim@...sung.com>,
        Rob Clark <robdclark@...il.com>,
        Tian Tao <tiantao6@...ilicon.com>,
        Chen Feng <puck.chen@...ilicon.com>,
        Xinwei Kong <kong.kongxinwei@...ilicon.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        linux-samsung-soc@...r.kernel.org,
        Xinliang Liu <xinliang.liu@...aro.org>,
        John Stultz <john.stultz@...aro.org>,
        linux-kernel@...r.kernel.org, Inki Dae <inki.dae@...sung.com>,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        Sean Paul <sean@...rly.run>
Subject: [PATCH v6 05/21] drm/bridge: lt8912b: Switch to devm MIPI-DSI helpers

Let's switch to the new devm MIPI-DSI function to register and attach
our secondary device.

Acked-by: Sam Ravnborg <sam@...nborg.org>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
 drivers/gpu/drm/bridge/lontium-lt8912b.c | 20 ++++----------------
 1 file changed, 4 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 1b0c7eaf6c84..cc968d65936b 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -472,11 +472,11 @@ static int lt8912_attach_dsi(struct lt8912 *lt)
 		return -EPROBE_DEFER;
 	}
 
-	dsi = mipi_dsi_device_register_full(host, &info);
+	dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
 	if (IS_ERR(dsi)) {
 		ret = PTR_ERR(dsi);
 		dev_err(dev, "failed to create dsi device (%d)\n", ret);
-		goto err_dsi_device;
+		return ret;
 	}
 
 	lt->dsi = dsi;
@@ -489,24 +489,13 @@ static int lt8912_attach_dsi(struct lt8912 *lt)
 			  MIPI_DSI_MODE_LPM |
 			  MIPI_DSI_MODE_NO_EOT_PACKET;
 
-	ret = mipi_dsi_attach(dsi);
+	ret = devm_mipi_dsi_attach(dev, dsi);
 	if (ret < 0) {
 		dev_err(dev, "failed to attach dsi to host\n");
-		goto err_dsi_attach;
+		return ret;
 	}
 
 	return 0;
-
-err_dsi_attach:
-	mipi_dsi_device_unregister(dsi);
-err_dsi_device:
-	return ret;
-}
-
-static void lt8912_detach_dsi(struct lt8912 *lt)
-{
-	mipi_dsi_detach(lt->dsi);
-	mipi_dsi_device_unregister(lt->dsi);
 }
 
 static int lt8912_bridge_connector_init(struct drm_bridge *bridge)
@@ -573,7 +562,6 @@ static void lt8912_bridge_detach(struct drm_bridge *bridge)
 	struct lt8912 *lt = bridge_to_lt8912(bridge);
 
 	if (lt->is_attached) {
-		lt8912_detach_dsi(lt);
 		lt8912_hard_power_off(lt);
 		drm_connector_unregister(&lt->connector);
 		drm_connector_cleanup(&lt->connector);
-- 
2.31.1