linux-kernel - [PATCH RFC 1/4] drm/vkms: Switch to managed for connector

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Message-Id: <20240814-google-vkms-managed-v1-1-7ab8b8921103@bootlin.com>
Date: Wed, 14 Aug 2024 12:06:34 +0200
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>, 
 Melissa Wen <melissa.srw@...il.com>, 
 Maíra Canal <mairacanal@...eup.net>, 
 Haneen Mohammed <hamohammed.sa@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>
Cc: dri-devel@...ts.freedesktop.org, arthurgrillo@...eup.net, 
 linux-kernel@...r.kernel.org, jeremie.dautheribes@...tlin.com, 
 miquel.raynal@...tlin.com, thomas.petazzoni@...tlin.com, 
 seanpaul@...gle.com, nicolejadeyee@...gle.com, 
 Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH RFC 1/4] drm/vkms: Switch to managed for connector

The current VKMS driver uses non-managed function to create connectors. It
is not an issue yet, but in order to support multiple devices easily,
convert this code to use drm and device managed helpers.

Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
 drivers/gpu/drm/vkms/vkms_drv.h    |  1 -
 drivers/gpu/drm/vkms/vkms_output.c | 22 ++++++++++------------
 2 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index f74a5c2045f9..cea7b2640c5d 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -43,7 +43,6 @@
 struct vkms_output {
 	struct drm_crtc crtc;
 	struct drm_encoder encoder;
-	struct drm_connector connector;
 	struct drm_writeback_connector wb_connector;
 	struct hrtimer vblank_hrtimer;
 	ktime_t period_ns;
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
index 20073a00b200..4767838c3a73 100644
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ b/drivers/gpu/drm/vkms/vkms_output.c
@@ -3,6 +3,7 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_probe_helper.h>
+#include <drm/drm_managed.h>
 
 #include "vkms_writeback.h"
 #include "vkms_plane.h"
@@ -10,7 +11,6 @@
 
 static const struct drm_connector_funcs vkms_connector_funcs = {
 	.fill_modes = drm_helper_probe_single_connector_modes,
-	.destroy = drm_connector_cleanup,
 	.reset = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
@@ -54,7 +54,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int possible_crtc_index)
 {
 	struct vkms_output *output = &vkmsdev->output;
 	struct drm_device *dev = &vkmsdev->drm;
-	struct drm_connector *connector = &output->connector;
+	struct drm_connector *connector;
 	struct drm_encoder *encoder = &output->encoder;
 	struct drm_crtc *crtc = &output->crtc;
 	struct vkms_plane *primary, *cursor = NULL;
@@ -90,11 +90,15 @@ int vkms_output_init(struct vkms_device *vkmsdev, int possible_crtc_index)
 	if (ret)
 		return ret;
 
-	ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
-				 DRM_MODE_CONNECTOR_VIRTUAL);
+	connector = drmm_kzalloc(&vkmsdev->drm, sizeof(*connector), GFP_KERNEL);
+	if (!connector)
+		return -ENOMEM;
+
+	ret = drmm_connector_init(dev, connector, &vkms_connector_funcs,
+				  DRM_MODE_CONNECTOR_VIRTUAL, NULL);
 	if (ret) {
 		DRM_ERROR("Failed to init connector\n");
-		goto err_connector;
+		return ret;
 	}
 
 	drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
@@ -103,7 +107,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int possible_crtc_index)
 			       DRM_MODE_ENCODER_VIRTUAL, NULL);
 	if (ret) {
 		DRM_ERROR("Failed to init encoder\n");
-		goto err_encoder;
+		return ret;
 	}
 	/*
 	 * This is an hardcoded value to select crtc for the encoder.
@@ -130,11 +134,5 @@ int vkms_output_init(struct vkms_device *vkmsdev, int possible_crtc_index)
 err_attach:
 	drm_encoder_cleanup(encoder);
 
-err_encoder:
-	drm_connector_cleanup(connector);
-
-err_connector:
-	drm_crtc_cleanup(crtc);
-
 	return ret;
 }

-- 
2.44.2