linux-kernel - [PATCH 6/6] drm/panel/samsung-s6e63m0: Use refcounted allocation in place of devm

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Message-Id: <20250708-b4-simple-panel-api-convert-july-v1-6-630902123ea1@redhat.com>
Date: Tue, 08 Jul 2025 15:35:18 -0500
From: Anusha Srivatsa <asrivats@...hat.com>
To: Neil Armstrong <neil.armstrong@...aro.org>, 
 Jessica Zhang <jessica.zhang@....qualcomm.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: Geert Uytterhoeven <geert@...ux-m68k.org>, 
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Anusha Srivatsa <asrivats@...hat.com>
Subject: [PATCH 6/6] drm/panel/samsung-s6e63m0: Use refcounted allocation
 in place of devm_kzalloc()

Move to using the new API devm_drm_panel_alloc() to allocate the
panel. In the call to the new API, avoid using explicit type and use
__typeof() for more type safety.

Signed-off-by: Anusha Srivatsa <asrivats@...hat.com>
---
 drivers/gpu/drm/panel/panel-samsung-s6e63m0.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
index ea241c89593b6726e8356c30229e99191c69bf03..562ad06c251f8992b3f28894ce2309913324ef11 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
@@ -677,9 +677,13 @@ int s6e63m0_probe(struct device *dev, void *trsp,
 	u32 max_brightness;
 	int ret;
 
-	ctx = devm_kzalloc(dev, sizeof(struct s6e63m0), GFP_KERNEL);
-	if (!ctx)
-		return -ENOMEM;
+	ctx = devm_drm_panel_alloc(dev, __typeof(*ctx), panel,
+				   &s6e63m0_drm_funcs,
+				   dsi_mode ? DRM_MODE_CONNECTOR_DSI :
+				   DRM_MODE_CONNECTOR_DPI);
+
+	if (IS_ERR(ctx))
+		return PTR_ERR(ctx);
 
 	ctx->transport_data = trsp;
 	ctx->dsi_mode = dsi_mode;
@@ -712,10 +716,6 @@ int s6e63m0_probe(struct device *dev, void *trsp,
 		return PTR_ERR(ctx->reset_gpio);
 	}
 
-	drm_panel_init(&ctx->panel, dev, &s6e63m0_drm_funcs,
-		       dsi_mode ? DRM_MODE_CONNECTOR_DSI :
-		       DRM_MODE_CONNECTOR_DPI);
-
 	ret = s6e63m0_backlight_register(ctx, max_brightness);
 	if (ret < 0)
 		return ret;

-- 
2.48.1