linux-kernel - [PATCH 24/34] drm/omap: dss: venc: convert to devm_drm_bridge

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Message-Id: <20250407-drm-bridge-convert-to-alloc-api-v1-24-42113ff8d9c0@bootlin.com>
Date: Mon, 07 Apr 2025 16:23:39 +0200
From: Luca Ceresoli <luca.ceresoli@...tlin.com>
To: 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>, 
 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>, 
 Jagan Teki <jagan@...rulasolutions.com>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, 
 Douglas Anderson <dianders@...omium.org>, 
 Chun-Kuang Hu <chunkuang.hu@...nel.org>, 
 Krzysztof Kozlowski <krzk@...nel.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: Anusha Srivatsa <asrivats@...hat.com>, 
 Paul Kocialkowski <paulk@...-base.io>, Dmitry Baryshkov <lumag@...nel.org>, 
 Hervé Codina <herve.codina@...tlin.com>, 
 Hui Pu <Hui.Pu@...ealthcare.com>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 dri-devel@...ts.freedesktop.org, asahi@...ts.linux.dev, 
 linux-kernel@...r.kernel.org, chrome-platform@...ts.linux.dev, 
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, linux-amlogic@...ts.infradead.org, 
 linux-renesas-soc@...r.kernel.org, platform-driver-x86@...r.kernel.org, 
 linux-samsung-soc@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
 freedreno@...ts.freedesktop.org, linux-stm32@...md-mailman.stormreply.com, 
 Luca Ceresoli <luca.ceresoli@...tlin.com>, 
 Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: [PATCH 24/34] drm/omap: dss: venc: convert to
 devm_drm_bridge_alloc() API

This is the new API for allocating DRM bridges.

Switching from a non-devm to a devm allocation allows removing the kfree()
in the remove function and in the probe error management code, and as a
consequence to simplify the code flow by removing now unnecessary gotos.

Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>

---

Cc: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
---
 drivers/gpu/drm/omapdrm/dss/venc.c | 23 ++++++++---------------
 1 file changed, 8 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/venc.c b/drivers/gpu/drm/omapdrm/dss/venc.c
index 50349518eda1630400529caf27ca4469bb09fc82..9b5d53dc361e654a2e4009c3c81b726f9ef76ced 100644
--- a/drivers/gpu/drm/omapdrm/dss/venc.c
+++ b/drivers/gpu/drm/omapdrm/dss/venc.c
@@ -664,7 +664,6 @@ static const struct drm_bridge_funcs venc_bridge_funcs = {
 
 static void venc_bridge_init(struct venc_device *venc)
 {
-	venc->bridge.funcs = &venc_bridge_funcs;
 	venc->bridge.of_node = venc->pdev->dev.of_node;
 	venc->bridge.ops = DRM_BRIDGE_OP_MODES;
 	venc->bridge.type = DRM_MODE_CONNECTOR_SVIDEO;
@@ -809,9 +808,9 @@ static int venc_probe(struct platform_device *pdev)
 	struct venc_device *venc;
 	int r;
 
-	venc = kzalloc(sizeof(*venc), GFP_KERNEL);
-	if (!venc)
-		return -ENOMEM;
+	venc = devm_drm_bridge_alloc(&pdev->dev, struct venc_device, bridge, &venc_bridge_funcs);
+	if (IS_ERR(venc))
+		return PTR_ERR(venc);
 
 	venc->pdev = pdev;
 
@@ -824,26 +823,24 @@ static int venc_probe(struct platform_device *pdev)
 	venc->config = &venc_config_pal_trm;
 
 	venc->base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(venc->base)) {
-		r = PTR_ERR(venc->base);
-		goto err_free;
-	}
+	if (IS_ERR(venc->base))
+		return PTR_ERR(venc->base);
 
 	venc->vdda_dac_reg = devm_regulator_get(&pdev->dev, "vdda");
 	if (IS_ERR(venc->vdda_dac_reg)) {
 		r = PTR_ERR(venc->vdda_dac_reg);
 		if (r != -EPROBE_DEFER)
 			DSSERR("can't get VDDA_DAC regulator\n");
-		goto err_free;
+		return r;
 	}
 
 	r = venc_get_clocks(venc);
 	if (r)
-		goto err_free;
+		return r;
 
 	r = venc_probe_of(venc);
 	if (r)
-		goto err_free;
+		return r;
 
 	pm_runtime_enable(&pdev->dev);
 
@@ -861,8 +858,6 @@ static int venc_probe(struct platform_device *pdev)
 	venc_uninit_output(venc);
 err_pm_disable:
 	pm_runtime_disable(&pdev->dev);
-err_free:
-	kfree(venc);
 	return r;
 }
 
@@ -875,8 +870,6 @@ static void venc_remove(struct platform_device *pdev)
 	venc_uninit_output(venc);
 
 	pm_runtime_disable(&pdev->dev);
-
-	kfree(venc);
 }
 
 static __maybe_unused int venc_runtime_suspend(struct device *dev)

-- 
2.49.0