linux-kernel - [PATCH v2 4/4] drm/panel/panel-simple: Use the new allocation in place of devm

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Message-Id: <20250327-b4-panel-refcounting-v2-4-b5f5ca551f95@redhat.com>
Date: Thu, 27 Mar 2025 10:55:42 -0400
From: Anusha Srivatsa <asrivats@...hat.com>
To: Neil Armstrong <neil.armstrong@...aro.org>, 
 Jessica Zhang <quic_jesszhan@...cinc.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, 
 Luca Ceresoli <luca.ceresoli@...tlin.com>, 
 Anusha Srivatsa <asrivats@...hat.com>
Subject: [PATCH v2 4/4] drm/panel/panel-simple: Use the new allocation in
 place of devm_kzalloc()

Start using the new helper that does the refcounted
allocations.

v2: check error condition (Luca)

Signed-off-by: Anusha Srivatsa <asrivats@...hat.com>
---
 drivers/gpu/drm/panel/panel-simple.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 6ba600f97aa4c8daae577823fcf17ef31b0eb46f..df718c4a86cb7dc0cd126e807d33306e5a21d8a0 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -579,9 +579,10 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 	u32 bus_flags;
 	int err;
 
-	panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL);
-	if (!panel)
-		return -ENOMEM;
+	panel = devm_drm_panel_alloc(dev, struct panel_simple, base,
+				     &panel_simple_funcs, desc->connector_type);
+	if (IS_ERR(panel))
+		return PTR_ERR(panel);
 
 	panel->desc = desc;
 
@@ -694,8 +695,6 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 	pm_runtime_set_autosuspend_delay(dev, 1000);
 	pm_runtime_use_autosuspend(dev);
 
-	drm_panel_init(&panel->base, dev, &panel_simple_funcs, connector_type);
-
 	err = drm_panel_of_backlight(&panel->base);
 	if (err) {
 		dev_err_probe(dev, err, "Could not find backlight\n");

-- 
2.48.1