linux-kernel - [PATCH v6 07/21] drm/bridge: lt9611: Switch to devm MIPI-DSI helpers

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Message-Id: <20211025151536.1048186-8-maxime@cerno.tech>
Date:   Mon, 25 Oct 2021 17:15:22 +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 07/21] drm/bridge: lt9611: 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>
Tested-by: John Stultz <john.stultz@...aro.org>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
 drivers/gpu/drm/bridge/lontium-lt9611.c | 24 ++++--------------------
 1 file changed, 4 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c
index 29b1ce2140ab..654131aca5ed 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611.c
@@ -760,6 +760,7 @@ static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611,
 	const struct mipi_dsi_device_info info = { "lt9611", 0, NULL };
 	struct mipi_dsi_device *dsi;
 	struct mipi_dsi_host *host;
+	struct device *dev = lt9611->dev;
 	int ret;
 
 	host = of_find_mipi_dsi_host_by_node(dsi_node);
@@ -768,7 +769,7 @@ static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611,
 		return ERR_PTR(-EPROBE_DEFER);
 	}
 
-	dsi = mipi_dsi_device_register_full(host, &info);
+	dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
 	if (IS_ERR(dsi)) {
 		dev_err(lt9611->dev, "failed to create dsi device\n");
 		return dsi;
@@ -779,29 +780,15 @@ static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611,
 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
 			  MIPI_DSI_MODE_VIDEO_HSE;
 
-	ret = mipi_dsi_attach(dsi);
+	ret = devm_mipi_dsi_attach(dev, dsi);
 	if (ret < 0) {
-		dev_err(lt9611->dev, "failed to attach dsi to host\n");
-		mipi_dsi_device_unregister(dsi);
+		dev_err(dev, "failed to attach dsi to host\n");
 		return ERR_PTR(ret);
 	}
 
 	return dsi;
 }
 
-static void lt9611_bridge_detach(struct drm_bridge *bridge)
-{
-	struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
-
-	if (lt9611->dsi1) {
-		mipi_dsi_detach(lt9611->dsi1);
-		mipi_dsi_device_unregister(lt9611->dsi1);
-	}
-
-	mipi_dsi_detach(lt9611->dsi0);
-	mipi_dsi_device_unregister(lt9611->dsi0);
-}
-
 static int lt9611_connector_init(struct drm_bridge *bridge, struct lt9611 *lt9611)
 {
 	int ret;
@@ -855,9 +842,7 @@ static int lt9611_bridge_attach(struct drm_bridge *bridge,
 	return 0;
 
 err_unregister_dsi0:
-	lt9611_bridge_detach(bridge);
 	drm_connector_cleanup(&lt9611->connector);
-	mipi_dsi_device_unregister(lt9611->dsi0);
 
 	return ret;
 }
@@ -952,7 +937,6 @@ static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge)
 
 static const struct drm_bridge_funcs lt9611_bridge_funcs = {
 	.attach = lt9611_bridge_attach,
-	.detach = lt9611_bridge_detach,
 	.mode_valid = lt9611_bridge_mode_valid,
 	.enable = lt9611_bridge_enable,
 	.disable = lt9611_bridge_disable,
-- 
2.31.1