linux-kernel - [PATCH v3 09/16] drm/vkms: Introduce config for CRTC name

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Message-Id: <20250121-google-remove-crtc-index-from-parameter-v3-9-cac00a3c3544@bootlin.com>
Date: Tue, 21 Jan 2025 11:55:33 +0100
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Maíra Canal <mairacanal@...eup.net>, 
 Haneen Mohammed <hamohammed.sa@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Melissa Wen <melissa.srw@...il.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>
Cc: arthurgrillo@...eup.net, jeremie.dautheribes@...tlin.com, 
 miquel.raynal@...tlin.com, thomas.petazzoni@...tlin.com, 
 seanpaul@...gle.com, nicolejadeyee@...gle.com, linux-kernel@...r.kernel.org, 
 dri-devel@...ts.freedesktop.org, Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH v3 09/16] drm/vkms: Introduce config for CRTC name

As a CRTC will be a directory in ConfigFS, add the name configuration for
CRTC name so we will be able to reflect the configfs directory name in the
drm name.

Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
 drivers/gpu/drm/vkms/vkms_config.c | 5 +++++
 drivers/gpu/drm/vkms/vkms_config.h | 2 ++
 drivers/gpu/drm/vkms/vkms_crtc.c   | 2 +-
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vkms/vkms_config.c b/drivers/gpu/drm/vkms/vkms_config.c
index 8c88af745eb208a52f58fbf5def3f16c29d31063..b610d37b675efaea7ca717f08e525beaf18d8d9e 100644
--- a/drivers/gpu/drm/vkms/vkms_config.c
+++ b/drivers/gpu/drm/vkms/vkms_config.c
@@ -37,6 +37,10 @@ struct vkms_config *vkms_config_alloc_default(bool enable_writeback, bool enable
 	if (!crtc)
 		goto err_alloc;
 	crtc->writeback = enable_writeback;
+	crtc->name = kzalloc(sizeof("Main CRTC"), GFP_KERNEL);
+	if (!crtc->name)
+		goto err_alloc;
+	sprintf(crtc->name, "Main CRTC");
 
 	encoder = vkms_config_create_encoder(vkms_config);
 	if (!encoder)
@@ -212,6 +216,7 @@ void vkms_config_delete_crtc(struct vkms_config_crtc *vkms_config_crtc,
 		}
 	}
 
+	kfree(vkms_config_crtc->name);
 	kfree(vkms_config_crtc);
 }
 
diff --git a/drivers/gpu/drm/vkms/vkms_config.h b/drivers/gpu/drm/vkms/vkms_config.h
index 874d631f8895c47eca6eba8bfe20b56b88966b67..efe984113fb664ff38a68b3be90063c366bb2892 100644
--- a/drivers/gpu/drm/vkms/vkms_config.h
+++ b/drivers/gpu/drm/vkms/vkms_config.h
@@ -29,6 +29,7 @@ struct vkms_config {
  * struct vkms_config_crtc
  *
  * @link: Link to the others CRTCs
+ * @name: Name of the CRTC
  * @possible_planes: List of planes that can be used with this CRTC
  * @possible_encoders: List of encoders that can be used with this CRTC
  * @crtc: Internal usage. This pointer should never be considered as valid. It can be used to
@@ -38,6 +39,7 @@ struct vkms_config {
 struct vkms_config_crtc {
 	struct list_head link;
 
+	char *name;
 	bool writeback;
 	struct xarray possible_planes;
 	struct xarray possible_encoders;
diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
index f4da196fd7774ee1dcc5148e6420186f1384b3fa..0c795de19db5359f968cb0c0a396626deb3f8e27 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.c
+++ b/drivers/gpu/drm/vkms/vkms_crtc.c
@@ -282,7 +282,7 @@ struct vkms_output *vkms_crtc_init(struct vkms_device *vkms_device,
 
 	vkms_out = drmm_crtc_alloc_with_planes(dev, struct vkms_output, crtc,
 					       primary, cursor,
-					       &vkms_crtc_funcs, NULL);
+					       &vkms_crtc_funcs, config->name);
 	if (IS_ERR(vkms_out)) {
 		DRM_DEV_ERROR(dev->dev, "Failed to init CRTC\n");
 		return vkms_out;

-- 
2.47.1