linux-kernel - [PATCH 2/4] drm/sti: make use of drm_of_component

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Message-Id: <20250717-sti-rework-v1-2-46d516fb1ebb@gmail.com>
Date: Thu, 17 Jul 2025 21:15:33 +0200
From: Raphael Gallais-Pou <rgallaispou@...il.com>
To: Alain Volmat <alain.volmat@...s.st.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>, 
 Patrice Chotard <patrice.chotard@...s.st.com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Subject: [PATCH 2/4] drm/sti: make use of drm_of_component_probe

Enhance the probing sequence by using the ports property of the
display-subsystem node.

That done, it becomes possible to handle the display-substem node
outside of the soc node within the device-tree and not have each IP
blocks as children of the display-subsystem node.

Signed-off-by: Raphael Gallais-Pou <rgallaispou@...il.com>
---
 drivers/gpu/drm/sti/sti_drv.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/sti/sti_drv.c b/drivers/gpu/drm/sti/sti_drv.c
index 42f21ab91957b38cb9aef012b6ee7f4ae1683edf..9d6a7c8fa0759c0b6fedf87169b18cff3684be46 100644
--- a/drivers/gpu/drm/sti/sti_drv.c
+++ b/drivers/gpu/drm/sti/sti_drv.c
@@ -231,9 +231,6 @@ static const struct component_master_ops sti_ops = {
 static int sti_platform_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct device_node *node = dev->of_node;
-	struct device_node *child_np;
-	struct component_match *match = NULL;
 	int ret;
 
 	ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
@@ -242,15 +239,7 @@ static int sti_platform_probe(struct platform_device *pdev)
 
 	devm_of_platform_populate(dev);
 
-	child_np = of_get_next_available_child(node, NULL);
-
-	while (child_np) {
-		drm_of_component_match_add(dev, &match, component_compare_of,
-					   child_np);
-		child_np = of_get_next_available_child(node, child_np);
-	}
-
-	return component_master_add_with_match(dev, &sti_ops, match);
+	return drm_of_component_probe(dev, component_compare_of, &sti_ops);
 }
 
 static void sti_platform_remove(struct platform_device *pdev)

-- 
2.50.1