[PATCH 0/6] drm: Provide a simple encoder

[PATCH 0/6] drm: Provide a simple encoder

[Thomas Zimmermann]

Many DRM drivers implement an encoder with an empty implementation. This
patchset adds drm_simple_encoder_init() and drm_simple_encoder_create(),
which can be used by drivers instead. Except for the destroy callback, the
simple encoder's implementation is empty.

The patchset also converts 4 encoder instances to use the simple-encoder
helpers. But there are at least 11 other drivers which can use the helper
and I think I did not examine all drivers yet.

The patchset was smoke-tested on mgag200 by running the fbdev console
and Gnome on X11.

Thomas Zimmermann (6):
  drm: Move initialization of encoder into an internal function
  drm: Add drm_simple_encoder_{init,create}()
  drm/ast: Use simple encoder
  drm/mgag200: Use simple encoder
  drm/qxl: Use simple encoder
  drm/simple-pipe: Use simple encoder

 drivers/gpu/drm/ast/ast_drv.h           |   6 +-
 drivers/gpu/drm/ast/ast_mode.c          |  25 +---
 drivers/gpu/drm/drm_encoder.c           | 190 +++++++++++++++++++++---
 drivers/gpu/drm/drm_simple_kms_helper.c |   8 +-
 drivers/gpu/drm/mgag200/mgag200_drv.h   |   7 -
 drivers/gpu/drm/mgag200/mgag200_mode.c  |  60 +-------
 drivers/gpu/drm/qxl/qxl_display.c       |  17 +--
 include/drm/drm_encoder.h               |  10 ++
 8 files changed, 191 insertions(+), 132 deletions(-)

--
2.25.0

[PATCH 0/6] drm: Provide a simple encoder

[Thomas Zimmermann]

Many DRM drivers implement an encoder with an empty implementation. This
patchset adds drm_simple_encoder_init() and drm_simple_encoder_create(),
which can be used by drivers instead. Except for the destroy callback, the
simple encoder's implementation is empty.

The patchset also converts 4 encoder instances to use the simple-encoder
helpers. But there are at least 11 other drivers which can use the helper
and I think I did not examine all drivers yet.

The patchset was smoke-tested on mgag200 by running the fbdev console
and Gnome on X11.

Thomas Zimmermann (6):
  drm: Move initialization of encoder into an internal function
  drm: Add drm_simple_encoder_{init,create}()
  drm/ast: Use simple encoder
  drm/mgag200: Use simple encoder
  drm/qxl: Use simple encoder
  drm/simple-pipe: Use simple encoder

 drivers/gpu/drm/ast/ast_drv.h           |   6 +-
 drivers/gpu/drm/ast/ast_mode.c          |  25 +---
 drivers/gpu/drm/drm_encoder.c           | 190 +++++++++++++++++++++---
 drivers/gpu/drm/drm_simple_kms_helper.c |   8 +-
 drivers/gpu/drm/mgag200/mgag200_drv.h   |   7 -
 drivers/gpu/drm/mgag200/mgag200_mode.c  |  60 +-------
 drivers/gpu/drm/qxl/qxl_display.c       |  17 +--
 include/drm/drm_encoder.h               |  10 ++
 8 files changed, 191 insertions(+), 132 deletions(-)

--
2.25.0

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[PATCH 1/6] drm: Move initialization of encoder into an internal function

[Thomas Zimmermann]

Moving encoder init code into an internal function, so it can be reused.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/drm_encoder.c | 78 +++++++++++++++++++++++------------
 1 file changed, 52 insertions(+), 26 deletions(-)

diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
index e555281f43d4..ffe691a1bf34 100644
--- a/drivers/gpu/drm/drm_encoder.c
+++ b/drivers/gpu/drm/drm_encoder.c
@@ -91,6 +91,47 @@ void drm_encoder_unregister_all(struct drm_device *dev)
 	}
 }
 
+static int __drm_encoder_init(struct drm_device *dev,
+			      struct drm_encoder *encoder,
+			      const struct drm_encoder_funcs *funcs,
+			      int encoder_type, char *name)
+{
+	int ret;
+
+	/* encoder index is used with 32-bit bitmasks */
+	if (WARN_ON(dev->mode_config.num_encoder >= 32))
+		return -EINVAL;
+
+	ret = drm_mode_object_add(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
+	if (ret)
+		return ret;
+
+	encoder->dev = dev;
+	encoder->encoder_type = encoder_type;
+	encoder->funcs = funcs;
+	if (name) {
+		encoder->name = name;
+	} else {
+		encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
+					  drm_encoder_enum_list[encoder_type].name,
+					  encoder->base.id);
+		if (!encoder->name) {
+			ret = -ENOMEM;
+			goto out_put;
+		}
+	}
+
+	INIT_LIST_HEAD(&encoder->bridge_chain);
+	list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
+	encoder->index = dev->mode_config.num_encoder++;
+
+out_put:
+	if (ret)
+		drm_mode_object_unregister(dev, &encoder->base);
+
+	return ret;
+}
+
 /**
  * drm_encoder_init - Init a preallocated encoder
  * @dev: drm device
@@ -111,43 +152,28 @@ int drm_encoder_init(struct drm_device *dev,
 		     const struct drm_encoder_funcs *funcs,
 		     int encoder_type, const char *name, ...)
 {
+	char *namestr = NULL;
 	int ret;
 
-	/* encoder index is used with 32bit bitmasks */
-	if (WARN_ON(dev->mode_config.num_encoder >= 32))
-		return -EINVAL;
-
-	ret = drm_mode_object_add(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
-	if (ret)
-		return ret;
-
-	encoder->dev = dev;
-	encoder->encoder_type = encoder_type;
-	encoder->funcs = funcs;
 	if (name) {
 		va_list ap;
 
 		va_start(ap, name);
-		encoder->name = kvasprintf(GFP_KERNEL, name, ap);
+		namestr = kvasprintf(GFP_KERNEL, name, ap);
 		va_end(ap);
-	} else {
-		encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
-					  drm_encoder_enum_list[encoder_type].name,
-					  encoder->base.id);
-	}
-	if (!encoder->name) {
-		ret = -ENOMEM;
-		goto out_put;
+		if (!namestr)
+			return -ENOMEM;
 	}
 
-	INIT_LIST_HEAD(&encoder->bridge_chain);
-	list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
-	encoder->index = dev->mode_config.num_encoder++;
-
-out_put:
+	ret = __drm_encoder_init(dev, encoder, funcs, encoder_type, namestr);
 	if (ret)
-		drm_mode_object_unregister(dev, &encoder->base);
+		goto err_kfree;
+
+	return 0;
 
+err_kfree:
+	if (name)
+		kfree(namestr);
 	return ret;
 }
 EXPORT_SYMBOL(drm_encoder_init);
-- 
2.25.0

[PATCH 1/6] drm: Move initialization of encoder into an internal function

[Thomas Zimmermann]

Moving encoder init code into an internal function, so it can be reused.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/drm_encoder.c | 78 +++++++++++++++++++++++------------
 1 file changed, 52 insertions(+), 26 deletions(-)

diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
index e555281f43d4..ffe691a1bf34 100644
--- a/drivers/gpu/drm/drm_encoder.c
+++ b/drivers/gpu/drm/drm_encoder.c
@@ -91,6 +91,47 @@ void drm_encoder_unregister_all(struct drm_device *dev)
 	}
 }
 
+static int __drm_encoder_init(struct drm_device *dev,
+			      struct drm_encoder *encoder,
+			      const struct drm_encoder_funcs *funcs,
+			      int encoder_type, char *name)
+{
+	int ret;
+
+	/* encoder index is used with 32-bit bitmasks */
+	if (WARN_ON(dev->mode_config.num_encoder >= 32))
+		return -EINVAL;
+
+	ret = drm_mode_object_add(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
+	if (ret)
+		return ret;
+
+	encoder->dev = dev;
+	encoder->encoder_type = encoder_type;
+	encoder->funcs = funcs;
+	if (name) {
+		encoder->name = name;
+	} else {
+		encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
+					  drm_encoder_enum_list[encoder_type].name,
+					  encoder->base.id);
+		if (!encoder->name) {
+			ret = -ENOMEM;
+			goto out_put;
+		}
+	}
+
+	INIT_LIST_HEAD(&encoder->bridge_chain);
+	list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
+	encoder->index = dev->mode_config.num_encoder++;
+
+out_put:
+	if (ret)
+		drm_mode_object_unregister(dev, &encoder->base);
+
+	return ret;
+}
+
 /**
  * drm_encoder_init - Init a preallocated encoder
  * @dev: drm device
@@ -111,43 +152,28 @@ int drm_encoder_init(struct drm_device *dev,
 		     const struct drm_encoder_funcs *funcs,
 		     int encoder_type, const char *name, ...)
 {
+	char *namestr = NULL;
 	int ret;
 
-	/* encoder index is used with 32bit bitmasks */
-	if (WARN_ON(dev->mode_config.num_encoder >= 32))
-		return -EINVAL;
-
-	ret = drm_mode_object_add(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
-	if (ret)
-		return ret;
-
-	encoder->dev = dev;
-	encoder->encoder_type = encoder_type;
-	encoder->funcs = funcs;
 	if (name) {
 		va_list ap;
 
 		va_start(ap, name);
-		encoder->name = kvasprintf(GFP_KERNEL, name, ap);
+		namestr = kvasprintf(GFP_KERNEL, name, ap);
 		va_end(ap);
-	} else {
-		encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
-					  drm_encoder_enum_list[encoder_type].name,
-					  encoder->base.id);
-	}
-	if (!encoder->name) {
-		ret = -ENOMEM;
-		goto out_put;
+		if (!namestr)
+			return -ENOMEM;
 	}
 
-	INIT_LIST_HEAD(&encoder->bridge_chain);
-	list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
-	encoder->index = dev->mode_config.num_encoder++;
-
-out_put:
+	ret = __drm_encoder_init(dev, encoder, funcs, encoder_type, namestr);
 	if (ret)
-		drm_mode_object_unregister(dev, &encoder->base);
+		goto err_kfree;
+
+	return 0;
 
+err_kfree:
+	if (name)
+		kfree(namestr);
 	return ret;
 }
 EXPORT_SYMBOL(drm_encoder_init);
-- 
2.25.0

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[PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Thomas Zimmermann]

The simple-encoder helpers initialize an encoder with an empty
implementation. This covers the requirements of most of the existing
DRM drivers. A call to drm_simple_encoder_create() allocates and
initializes an encoder instance, a call to drm_simple_encoder_init()
initializes a pre-allocated instance.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/drm_encoder.c | 116 ++++++++++++++++++++++++++++++++++
 include/drm/drm_encoder.h     |  10 +++
 2 files changed, 126 insertions(+)

diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
index ffe691a1bf34..1a65cab1f310 100644
--- a/drivers/gpu/drm/drm_encoder.c
+++ b/drivers/gpu/drm/drm_encoder.c
@@ -178,6 +178,122 @@ int drm_encoder_init(struct drm_device *dev,
 }
 EXPORT_SYMBOL(drm_encoder_init);
 
+static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
+	.destroy = drm_encoder_cleanup,
+};
+
+/**
+ * drm_simple_encoder_init - Init a preallocated encoder
+ * @dev: drm device
+ * @funcs: callbacks for this encoder
+ * @encoder_type: user visible type of the encoder
+ * @name: printf style format string for the encoder name, or NULL
+ *        for default name
+ *
+ * Initialises a preallocated encoder that has no further functionality. The
+ * encoder will be released automatically.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_simple_encoder_init(struct drm_device *dev,
+			    struct drm_encoder *encoder,
+			    int encoder_type, const char *name, ...)
+{
+	char *namestr = NULL;
+	int ret;
+
+	if (name) {
+		va_list ap;
+
+		va_start(ap, name);
+		namestr = kvasprintf(GFP_KERNEL, name, ap);
+		va_end(ap);
+		if (!namestr)
+			return -ENOMEM;
+	}
+
+	ret = __drm_encoder_init(dev, encoder,
+				 &drm_simple_encoder_funcs_cleanup,
+				 encoder_type, namestr);
+	if (ret)
+		goto err_kfree;
+
+	return 0;
+
+err_kfree:
+	if (name)
+		kfree(namestr);
+	return ret;
+}
+EXPORT_SYMBOL(drm_simple_encoder_init);
+
+static void drm_encoder_destroy(struct drm_encoder *encoder)
+{
+	struct drm_device *dev = encoder->dev;
+
+	drm_encoder_cleanup(encoder);
+	devm_kfree(dev->dev, encoder);
+}
+
+static const struct drm_encoder_funcs drm_simple_encoder_funcs_destroy = {
+	.destroy = drm_encoder_destroy,
+};
+
+/**
+ * drm_simple_encoder_create - Allocate and initialize an encoder
+ * @dev: drm device
+ * @encoder_type: user visible type of the encoder
+ * @name: printf style format string for the encoder name, or NULL for
+ *        default name
+ *
+ * Allocates and initialises an encoder that has no further functionality. The
+ * encoder will be released automatically.
+ *
+ * Returns:
+ * The encoder on success, a pointer-encoder error code on failure.
+ */
+struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
+					      int encoder_type,
+					      const char *name, ...)
+{
+	char *namestr = NULL;
+	struct drm_encoder *encoder;
+	int ret;
+
+	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
+	if (!encoder)
+		return ERR_PTR(-ENOMEM);
+
+	if (name) {
+		va_list ap;
+
+		va_start(ap, name);
+		namestr = kvasprintf(GFP_KERNEL, name, ap);
+		va_end(ap);
+		if (!namestr) {
+			ret = -ENOMEM;
+			goto err_devm_kfree;
+		}
+	}
+
+	ret = __drm_encoder_init(dev, encoder,
+				 &drm_simple_encoder_funcs_destroy,
+				 encoder_type, namestr);
+	if (ret)
+		goto err_kfree;
+
+	return encoder;
+
+err_kfree:
+	if (name)
+		kfree(namestr);
+err_devm_kfree:
+	devm_kfree(dev->dev, encoder);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL(drm_simple_encoder_create);
+
 /**
  * drm_encoder_cleanup - cleans up an initialised encoder
  * @encoder: encoder to cleanup
diff --git a/include/drm/drm_encoder.h b/include/drm/drm_encoder.h
index 5623994b6e9e..0214f6cf9de6 100644
--- a/include/drm/drm_encoder.h
+++ b/include/drm/drm_encoder.h
@@ -190,6 +190,16 @@ int drm_encoder_init(struct drm_device *dev,
 		     const struct drm_encoder_funcs *funcs,
 		     int encoder_type, const char *name, ...);
 
+__printf(4, 5)
+int drm_simple_encoder_init(struct drm_device *dev,
+			    struct drm_encoder *encoder,
+			    int encoder_type, const char *name, ...);
+
+__printf(3, 4)
+struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
+					      int encoder_type,
+					      const char *name, ...);
+
 /**
  * drm_encoder_index - find the index of a registered encoder
  * @encoder: encoder to find index for
-- 
2.25.0

[PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Thomas Zimmermann]

The simple-encoder helpers initialize an encoder with an empty
implementation. This covers the requirements of most of the existing
DRM drivers. A call to drm_simple_encoder_create() allocates and
initializes an encoder instance, a call to drm_simple_encoder_init()
initializes a pre-allocated instance.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/drm_encoder.c | 116 ++++++++++++++++++++++++++++++++++
 include/drm/drm_encoder.h     |  10 +++
 2 files changed, 126 insertions(+)

diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
index ffe691a1bf34..1a65cab1f310 100644
--- a/drivers/gpu/drm/drm_encoder.c
+++ b/drivers/gpu/drm/drm_encoder.c
@@ -178,6 +178,122 @@ int drm_encoder_init(struct drm_device *dev,
 }
 EXPORT_SYMBOL(drm_encoder_init);
 
+static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
+	.destroy = drm_encoder_cleanup,
+};
+
+/**
+ * drm_simple_encoder_init - Init a preallocated encoder
+ * @dev: drm device
+ * @funcs: callbacks for this encoder
+ * @encoder_type: user visible type of the encoder
+ * @name: printf style format string for the encoder name, or NULL
+ *        for default name
+ *
+ * Initialises a preallocated encoder that has no further functionality. The
+ * encoder will be released automatically.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_simple_encoder_init(struct drm_device *dev,
+			    struct drm_encoder *encoder,
+			    int encoder_type, const char *name, ...)
+{
+	char *namestr = NULL;
+	int ret;
+
+	if (name) {
+		va_list ap;
+
+		va_start(ap, name);
+		namestr = kvasprintf(GFP_KERNEL, name, ap);
+		va_end(ap);
+		if (!namestr)
+			return -ENOMEM;
+	}
+
+	ret = __drm_encoder_init(dev, encoder,
+				 &drm_simple_encoder_funcs_cleanup,
+				 encoder_type, namestr);
+	if (ret)
+		goto err_kfree;
+
+	return 0;
+
+err_kfree:
+	if (name)
+		kfree(namestr);
+	return ret;
+}
+EXPORT_SYMBOL(drm_simple_encoder_init);
+
+static void drm_encoder_destroy(struct drm_encoder *encoder)
+{
+	struct drm_device *dev = encoder->dev;
+
+	drm_encoder_cleanup(encoder);
+	devm_kfree(dev->dev, encoder);
+}
+
+static const struct drm_encoder_funcs drm_simple_encoder_funcs_destroy = {
+	.destroy = drm_encoder_destroy,
+};
+
+/**
+ * drm_simple_encoder_create - Allocate and initialize an encoder
+ * @dev: drm device
+ * @encoder_type: user visible type of the encoder
+ * @name: printf style format string for the encoder name, or NULL for
+ *        default name
+ *
+ * Allocates and initialises an encoder that has no further functionality. The
+ * encoder will be released automatically.
+ *
+ * Returns:
+ * The encoder on success, a pointer-encoder error code on failure.
+ */
+struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
+					      int encoder_type,
+					      const char *name, ...)
+{
+	char *namestr = NULL;
+	struct drm_encoder *encoder;
+	int ret;
+
+	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
+	if (!encoder)
+		return ERR_PTR(-ENOMEM);
+
+	if (name) {
+		va_list ap;
+
+		va_start(ap, name);
+		namestr = kvasprintf(GFP_KERNEL, name, ap);
+		va_end(ap);
+		if (!namestr) {
+			ret = -ENOMEM;
+			goto err_devm_kfree;
+		}
+	}
+
+	ret = __drm_encoder_init(dev, encoder,
+				 &drm_simple_encoder_funcs_destroy,
+				 encoder_type, namestr);
+	if (ret)
+		goto err_kfree;
+
+	return encoder;
+
+err_kfree:
+	if (name)
+		kfree(namestr);
+err_devm_kfree:
+	devm_kfree(dev->dev, encoder);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL(drm_simple_encoder_create);
+
 /**
  * drm_encoder_cleanup - cleans up an initialised encoder
  * @encoder: encoder to cleanup
diff --git a/include/drm/drm_encoder.h b/include/drm/drm_encoder.h
index 5623994b6e9e..0214f6cf9de6 100644
--- a/include/drm/drm_encoder.h
+++ b/include/drm/drm_encoder.h
@@ -190,6 +190,16 @@ int drm_encoder_init(struct drm_device *dev,
 		     const struct drm_encoder_funcs *funcs,
 		     int encoder_type, const char *name, ...);
 
+__printf(4, 5)
+int drm_simple_encoder_init(struct drm_device *dev,
+			    struct drm_encoder *encoder,
+			    int encoder_type, const char *name, ...);
+
+__printf(3, 4)
+struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
+					      int encoder_type,
+					      const char *name, ...);
+
 /**
  * drm_encoder_index - find the index of a registered encoder
  * @encoder: encoder to find index for
-- 
2.25.0

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https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH 3/6] drm/ast: Use simple encoder

[Thomas Zimmermann]

The ast driver uses an empty implementation for its encoder. Replace
the code with the generic simple encoder.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/ast/ast_drv.h  |  6 +-----
 drivers/gpu/drm/ast/ast_mode.c | 25 ++++++++-----------------
 2 files changed, 9 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index f5d8780776ae..656d591b154b 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -121,6 +121,7 @@ struct ast_private {
 		unsigned int next_index;
 	} cursor;
 
+	struct drm_encoder encoder;
 	struct drm_plane primary_plane;
 	struct drm_plane cursor_plane;
 
@@ -238,13 +239,8 @@ struct ast_crtc {
 	u8 offset_x, offset_y;
 };
 
-struct ast_encoder {
-	struct drm_encoder base;
-};
-
 #define to_ast_crtc(x) container_of(x, struct ast_crtc, base)
 #define to_ast_connector(x) container_of(x, struct ast_connector, base)
-#define to_ast_encoder(x) container_of(x, struct ast_encoder, base)
 
 struct ast_vbios_stdtable {
 	u8 misc;
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 562ea6d9df13..60facaa152ac 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -968,28 +968,19 @@ static int ast_crtc_init(struct drm_device *dev)
  * Encoder
  */
 
-static void ast_encoder_destroy(struct drm_encoder *encoder)
-{
-	drm_encoder_cleanup(encoder);
-	kfree(encoder);
-}
-
-static const struct drm_encoder_funcs ast_enc_funcs = {
-	.destroy = ast_encoder_destroy,
-};
-
 static int ast_encoder_init(struct drm_device *dev)
 {
-	struct ast_encoder *ast_encoder;
+	struct ast_private *ast = dev->dev_private;
+	struct drm_encoder *encoder = &ast->encoder;
+	int ret;
 
-	ast_encoder = kzalloc(sizeof(struct ast_encoder), GFP_KERNEL);
-	if (!ast_encoder)
-		return -ENOMEM;
+	ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_DAC,
+				      NULL);
+	if (ret)
+		return ret;
 
-	drm_encoder_init(dev, &ast_encoder->base, &ast_enc_funcs,
-			 DRM_MODE_ENCODER_DAC, NULL);
+	encoder->possible_crtcs = 1;
 
-	ast_encoder->base.possible_crtcs = 1;
 	return 0;
 }
 
-- 
2.25.0

[PATCH 3/6] drm/ast: Use simple encoder

[Thomas Zimmermann]

The ast driver uses an empty implementation for its encoder. Replace
the code with the generic simple encoder.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/ast/ast_drv.h  |  6 +-----
 drivers/gpu/drm/ast/ast_mode.c | 25 ++++++++-----------------
 2 files changed, 9 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index f5d8780776ae..656d591b154b 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -121,6 +121,7 @@ struct ast_private {
 		unsigned int next_index;
 	} cursor;
 
+	struct drm_encoder encoder;
 	struct drm_plane primary_plane;
 	struct drm_plane cursor_plane;
 
@@ -238,13 +239,8 @@ struct ast_crtc {
 	u8 offset_x, offset_y;
 };
 
-struct ast_encoder {
-	struct drm_encoder base;
-};
-
 #define to_ast_crtc(x) container_of(x, struct ast_crtc, base)
 #define to_ast_connector(x) container_of(x, struct ast_connector, base)
-#define to_ast_encoder(x) container_of(x, struct ast_encoder, base)
 
 struct ast_vbios_stdtable {
 	u8 misc;
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 562ea6d9df13..60facaa152ac 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -968,28 +968,19 @@ static int ast_crtc_init(struct drm_device *dev)
  * Encoder
  */
 
-static void ast_encoder_destroy(struct drm_encoder *encoder)
-{
-	drm_encoder_cleanup(encoder);
-	kfree(encoder);
-}
-
-static const struct drm_encoder_funcs ast_enc_funcs = {
-	.destroy = ast_encoder_destroy,
-};
-
 static int ast_encoder_init(struct drm_device *dev)
 {
-	struct ast_encoder *ast_encoder;
+	struct ast_private *ast = dev->dev_private;
+	struct drm_encoder *encoder = &ast->encoder;
+	int ret;
 
-	ast_encoder = kzalloc(sizeof(struct ast_encoder), GFP_KERNEL);
-	if (!ast_encoder)
-		return -ENOMEM;
+	ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_DAC,
+				      NULL);
+	if (ret)
+		return ret;
 
-	drm_encoder_init(dev, &ast_encoder->base, &ast_enc_funcs,
-			 DRM_MODE_ENCODER_DAC, NULL);
+	encoder->possible_crtcs = 1;
 
-	ast_encoder->base.possible_crtcs = 1;
 	return 0;
 }
 
-- 
2.25.0

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[PATCH 4/6] drm/mgag200: Use simple encoder

[Thomas Zimmermann]

The mgag200 driver uses an empty implementation for its encoder. Replace
the code with the generic simple encoder.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/mgag200/mgag200_drv.h  |  7 ---
 drivers/gpu/drm/mgag200/mgag200_mode.c | 60 +-------------------------
 2 files changed, 2 insertions(+), 65 deletions(-)

diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.h b/drivers/gpu/drm/mgag200/mgag200_drv.h
index aa32aad222c2..9bb9e8e14539 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.h
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.h
@@ -95,7 +95,6 @@
 #define MATROX_DPMS_CLEARED (-1)
 
 #define to_mga_crtc(x) container_of(x, struct mga_crtc, base)
-#define to_mga_encoder(x) container_of(x, struct mga_encoder, base)
 #define to_mga_connector(x) container_of(x, struct mga_connector, base)
 
 struct mga_crtc {
@@ -110,12 +109,6 @@ struct mga_mode_info {
 	struct mga_crtc *crtc;
 };
 
-struct mga_encoder {
-	struct drm_encoder base;
-	int last_dpms;
-};
-
-
 struct mga_i2c_chan {
 	struct i2c_adapter adapter;
 	struct drm_device *dev;
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 62a8e9ccb16d..d8f1a552f8ac 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -1449,72 +1449,16 @@ static void mga_crtc_init(struct mga_device *mdev)
 	drm_crtc_helper_add(&mga_crtc->base, &mga_helper_funcs);
 }
 
-/*
- * The encoder comes after the CRTC in the output pipeline, but before
- * the connector. It's responsible for ensuring that the digital
- * stream is appropriately converted into the output format. Setup is
- * very simple in this case - all we have to do is inform qemu of the
- * colour depth in order to ensure that it displays appropriately
- */
-
-/*
- * These functions are analagous to those in the CRTC code, but are intended
- * to handle any encoder-specific limitations
- */
-static void mga_encoder_mode_set(struct drm_encoder *encoder,
-				struct drm_display_mode *mode,
-				struct drm_display_mode *adjusted_mode)
-{
-
-}
-
-static void mga_encoder_dpms(struct drm_encoder *encoder, int state)
-{
-	return;
-}
-
-static void mga_encoder_prepare(struct drm_encoder *encoder)
-{
-}
-
-static void mga_encoder_commit(struct drm_encoder *encoder)
-{
-}
-
-static void mga_encoder_destroy(struct drm_encoder *encoder)
-{
-	struct mga_encoder *mga_encoder = to_mga_encoder(encoder);
-	drm_encoder_cleanup(encoder);
-	kfree(mga_encoder);
-}
-
-static const struct drm_encoder_helper_funcs mga_encoder_helper_funcs = {
-	.dpms = mga_encoder_dpms,
-	.mode_set = mga_encoder_mode_set,
-	.prepare = mga_encoder_prepare,
-	.commit = mga_encoder_commit,
-};
-
-static const struct drm_encoder_funcs mga_encoder_encoder_funcs = {
-	.destroy = mga_encoder_destroy,
-};
-
 static struct drm_encoder *mga_encoder_init(struct drm_device *dev)
 {
 	struct drm_encoder *encoder;
-	struct mga_encoder *mga_encoder;
 
-	mga_encoder = kzalloc(sizeof(struct mga_encoder), GFP_KERNEL);
-	if (!mga_encoder)
+	encoder = drm_simple_encoder_create(dev, DRM_MODE_ENCODER_DAC, NULL);
+	if (IS_ERR(encoder))
 		return NULL;
 
-	encoder = &mga_encoder->base;
 	encoder->possible_crtcs = 0x1;
 
-	drm_encoder_init(dev, encoder, &mga_encoder_encoder_funcs,
-			 DRM_MODE_ENCODER_DAC, NULL);
-	drm_encoder_helper_add(encoder, &mga_encoder_helper_funcs);
-
 	return encoder;
 }
 
-- 
2.25.0

[PATCH 4/6] drm/mgag200: Use simple encoder

[Thomas Zimmermann]

The mgag200 driver uses an empty implementation for its encoder. Replace
the code with the generic simple encoder.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/mgag200/mgag200_drv.h  |  7 ---
 drivers/gpu/drm/mgag200/mgag200_mode.c | 60 +-------------------------
 2 files changed, 2 insertions(+), 65 deletions(-)

diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.h b/drivers/gpu/drm/mgag200/mgag200_drv.h
index aa32aad222c2..9bb9e8e14539 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.h
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.h
@@ -95,7 +95,6 @@
 #define MATROX_DPMS_CLEARED (-1)
 
 #define to_mga_crtc(x) container_of(x, struct mga_crtc, base)
-#define to_mga_encoder(x) container_of(x, struct mga_encoder, base)
 #define to_mga_connector(x) container_of(x, struct mga_connector, base)
 
 struct mga_crtc {
@@ -110,12 +109,6 @@ struct mga_mode_info {
 	struct mga_crtc *crtc;
 };
 
-struct mga_encoder {
-	struct drm_encoder base;
-	int last_dpms;
-};
-
-
 struct mga_i2c_chan {
 	struct i2c_adapter adapter;
 	struct drm_device *dev;
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 62a8e9ccb16d..d8f1a552f8ac 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -1449,72 +1449,16 @@ static void mga_crtc_init(struct mga_device *mdev)
 	drm_crtc_helper_add(&mga_crtc->base, &mga_helper_funcs);
 }
 
-/*
- * The encoder comes after the CRTC in the output pipeline, but before
- * the connector. It's responsible for ensuring that the digital
- * stream is appropriately converted into the output format. Setup is
- * very simple in this case - all we have to do is inform qemu of the
- * colour depth in order to ensure that it displays appropriately
- */
-
-/*
- * These functions are analagous to those in the CRTC code, but are intended
- * to handle any encoder-specific limitations
- */
-static void mga_encoder_mode_set(struct drm_encoder *encoder,
-				struct drm_display_mode *mode,
-				struct drm_display_mode *adjusted_mode)
-{
-
-}
-
-static void mga_encoder_dpms(struct drm_encoder *encoder, int state)
-{
-	return;
-}
-
-static void mga_encoder_prepare(struct drm_encoder *encoder)
-{
-}
-
-static void mga_encoder_commit(struct drm_encoder *encoder)
-{
-}
-
-static void mga_encoder_destroy(struct drm_encoder *encoder)
-{
-	struct mga_encoder *mga_encoder = to_mga_encoder(encoder);
-	drm_encoder_cleanup(encoder);
-	kfree(mga_encoder);
-}
-
-static const struct drm_encoder_helper_funcs mga_encoder_helper_funcs = {
-	.dpms = mga_encoder_dpms,
-	.mode_set = mga_encoder_mode_set,
-	.prepare = mga_encoder_prepare,
-	.commit = mga_encoder_commit,
-};
-
-static const struct drm_encoder_funcs mga_encoder_encoder_funcs = {
-	.destroy = mga_encoder_destroy,
-};
-
 static struct drm_encoder *mga_encoder_init(struct drm_device *dev)
 {
 	struct drm_encoder *encoder;
-	struct mga_encoder *mga_encoder;
 
-	mga_encoder = kzalloc(sizeof(struct mga_encoder), GFP_KERNEL);
-	if (!mga_encoder)
+	encoder = drm_simple_encoder_create(dev, DRM_MODE_ENCODER_DAC, NULL);
+	if (IS_ERR(encoder))
 		return NULL;
 
-	encoder = &mga_encoder->base;
 	encoder->possible_crtcs = 0x1;
 
-	drm_encoder_init(dev, encoder, &mga_encoder_encoder_funcs,
-			 DRM_MODE_ENCODER_DAC, NULL);
-	drm_encoder_helper_add(encoder, &mga_encoder_helper_funcs);
-
 	return encoder;
 }
 
-- 
2.25.0

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[PATCH 5/6] drm/qxl: Use simple encoder

[Thomas Zimmermann]

The qxl driver uses an empty implementation for its encoder. Replace
the code with the generic simple encoder.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/qxl/qxl_display.c | 17 ++---------------
 1 file changed, 2 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index ab4f8dd00400..fc71f7d9436a 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -1007,9 +1007,6 @@ static struct drm_encoder *qxl_best_encoder(struct drm_connector *connector)
 	return &qxl_output->enc;
 }
 
-static const struct drm_encoder_helper_funcs qxl_enc_helper_funcs = {
-};
-
 static const struct drm_connector_helper_funcs qxl_connector_helper_funcs = {
 	.get_modes = qxl_conn_get_modes,
 	.mode_valid = qxl_conn_mode_valid,
@@ -1059,15 +1056,6 @@ static const struct drm_connector_funcs qxl_connector_funcs = {
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 };
 
-static void qxl_enc_destroy(struct drm_encoder *encoder)
-{
-	drm_encoder_cleanup(encoder);
-}
-
-static const struct drm_encoder_funcs qxl_enc_funcs = {
-	.destroy = qxl_enc_destroy,
-};
-
 static int qxl_mode_create_hotplug_mode_update_property(struct qxl_device *qdev)
 {
 	if (qdev->hotplug_mode_update_property)
@@ -1098,15 +1086,14 @@ static int qdev_output_init(struct drm_device *dev, int num_output)
 	drm_connector_init(dev, &qxl_output->base,
 			   &qxl_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
 
-	drm_encoder_init(dev, &qxl_output->enc, &qxl_enc_funcs,
-			 DRM_MODE_ENCODER_VIRTUAL, NULL);
+	drm_simple_encoder_init(dev, qxl_output->enc, DRM_MODE_ENCODER_VIRTUAL,
+				NULL);
 
 	/* we get HPD via client monitors config */
 	connector->polled = DRM_CONNECTOR_POLL_HPD;
 	encoder->possible_crtcs = 1 << num_output;
 	drm_connector_attach_encoder(&qxl_output->base,
 					  &qxl_output->enc);
-	drm_encoder_helper_add(encoder, &qxl_enc_helper_funcs);
 	drm_connector_helper_add(connector, &qxl_connector_helper_funcs);
 
 	drm_object_attach_property(&connector->base,
-- 
2.25.0

[PATCH 5/6] drm/qxl: Use simple encoder

[Thomas Zimmermann]

The qxl driver uses an empty implementation for its encoder. Replace
the code with the generic simple encoder.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/qxl/qxl_display.c | 17 ++---------------
 1 file changed, 2 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index ab4f8dd00400..fc71f7d9436a 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -1007,9 +1007,6 @@ static struct drm_encoder *qxl_best_encoder(struct drm_connector *connector)
 	return &qxl_output->enc;
 }
 
-static const struct drm_encoder_helper_funcs qxl_enc_helper_funcs = {
-};
-
 static const struct drm_connector_helper_funcs qxl_connector_helper_funcs = {
 	.get_modes = qxl_conn_get_modes,
 	.mode_valid = qxl_conn_mode_valid,
@@ -1059,15 +1056,6 @@ static const struct drm_connector_funcs qxl_connector_funcs = {
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 };
 
-static void qxl_enc_destroy(struct drm_encoder *encoder)
-{
-	drm_encoder_cleanup(encoder);
-}
-
-static const struct drm_encoder_funcs qxl_enc_funcs = {
-	.destroy = qxl_enc_destroy,
-};
-
 static int qxl_mode_create_hotplug_mode_update_property(struct qxl_device *qdev)
 {
 	if (qdev->hotplug_mode_update_property)
@@ -1098,15 +1086,14 @@ static int qdev_output_init(struct drm_device *dev, int num_output)
 	drm_connector_init(dev, &qxl_output->base,
 			   &qxl_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
 
-	drm_encoder_init(dev, &qxl_output->enc, &qxl_enc_funcs,
-			 DRM_MODE_ENCODER_VIRTUAL, NULL);
+	drm_simple_encoder_init(dev, qxl_output->enc, DRM_MODE_ENCODER_VIRTUAL,
+				NULL);
 
 	/* we get HPD via client monitors config */
 	connector->polled = DRM_CONNECTOR_POLL_HPD;
 	encoder->possible_crtcs = 1 << num_output;
 	drm_connector_attach_encoder(&qxl_output->base,
 					  &qxl_output->enc);
-	drm_encoder_helper_add(encoder, &qxl_enc_helper_funcs);
 	drm_connector_helper_add(connector, &qxl_connector_helper_funcs);
 
 	drm_object_attach_property(&connector->base,
-- 
2.25.0

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[PATCH 6/6] drm/simple-pipe: Use simple encoder

[Thomas Zimmermann]

The simple-pipe helpers use an empty implementation for the encoder.
Replace the code with the generic simple encoder.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/drm_simple_kms_helper.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c
index 15fb516ae2d8..e16606b3ee20 100644
--- a/drivers/gpu/drm/drm_simple_kms_helper.c
+++ b/drivers/gpu/drm/drm_simple_kms_helper.c
@@ -28,10 +28,6 @@
  * encoder drivers.
  */
 
-static const struct drm_encoder_funcs drm_simple_kms_encoder_funcs = {
-	.destroy = drm_encoder_cleanup,
-};
-
 static enum drm_mode_status
 drm_simple_kms_crtc_mode_valid(struct drm_crtc *crtc,
 			       const struct drm_display_mode *mode)
@@ -288,8 +284,8 @@ int drm_simple_display_pipe_init(struct drm_device *dev,
 		return ret;
 
 	encoder->possible_crtcs = drm_crtc_mask(crtc);
-	ret = drm_encoder_init(dev, encoder, &drm_simple_kms_encoder_funcs,
-			       DRM_MODE_ENCODER_NONE, NULL);
+	ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_NONE,
+				      NULL);
 	if (ret || !connector)
 		return ret;
 
-- 
2.25.0

[PATCH 6/6] drm/simple-pipe: Use simple encoder

[Thomas Zimmermann]

The simple-pipe helpers use an empty implementation for the encoder.
Replace the code with the generic simple encoder.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/drm_simple_kms_helper.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c
index 15fb516ae2d8..e16606b3ee20 100644
--- a/drivers/gpu/drm/drm_simple_kms_helper.c
+++ b/drivers/gpu/drm/drm_simple_kms_helper.c
@@ -28,10 +28,6 @@
  * encoder drivers.
  */
 
-static const struct drm_encoder_funcs drm_simple_kms_encoder_funcs = {
-	.destroy = drm_encoder_cleanup,
-};
-
 static enum drm_mode_status
 drm_simple_kms_crtc_mode_valid(struct drm_crtc *crtc,
 			       const struct drm_display_mode *mode)
@@ -288,8 +284,8 @@ int drm_simple_display_pipe_init(struct drm_device *dev,
 		return ret;
 
 	encoder->possible_crtcs = drm_crtc_mask(crtc);
-	ret = drm_encoder_init(dev, encoder, &drm_simple_kms_encoder_funcs,
-			       DRM_MODE_ENCODER_NONE, NULL);
+	ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_NONE,
+				      NULL);
 	if (ret || !connector)
 		return ret;
 
-- 
2.25.0

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Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Gerd Hoffmann]

> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
> +	.destroy = drm_encoder_cleanup,
> +};
> +
> +/**
> + * drm_simple_encoder_init - Init a preallocated encoder
> + * @dev: drm device
> + * @funcs: callbacks for this encoder
> + * @encoder_type: user visible type of the encoder
> + * @name: printf style format string for the encoder name, or NULL
> + *        for default name
> + *
> + * Initialises a preallocated encoder that has no further functionality. The
> + * encoder will be released automatically.
> + *
> + * Returns:
> + * Zero on success, error code on failure.
> + */
> +int drm_simple_encoder_init(struct drm_device *dev,
> +			    struct drm_encoder *encoder,
> +			    int encoder_type, const char *name, ...)

How about using

#define drm_simple_encoder_init(dev, type, name, ...) \
        drm_encoder_init(dev, drm_simple_encoder_funcs_cleanup, type, name, __VA_ARGS__)

instead ?

cheers,
  Gerd

Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Gerd Hoffmann]

> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
> +	.destroy = drm_encoder_cleanup,
> +};
> +
> +/**
> + * drm_simple_encoder_init - Init a preallocated encoder
> + * @dev: drm device
> + * @funcs: callbacks for this encoder
> + * @encoder_type: user visible type of the encoder
> + * @name: printf style format string for the encoder name, or NULL
> + *        for default name
> + *
> + * Initialises a preallocated encoder that has no further functionality. The
> + * encoder will be released automatically.
> + *
> + * Returns:
> + * Zero on success, error code on failure.
> + */
> +int drm_simple_encoder_init(struct drm_device *dev,
> +			    struct drm_encoder *encoder,
> +			    int encoder_type, const char *name, ...)

How about using

#define drm_simple_encoder_init(dev, type, name, ...) \
        drm_encoder_init(dev, drm_simple_encoder_funcs_cleanup, type, name, __VA_ARGS__)

instead ?

cheers,
  Gerd

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Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Thomas Zimmermann]

[-- Attachment #1.1.1: Type: text/plain, Size: 1780 bytes --]

Hi Gerd

Am 07.02.20 um 11:33 schrieb Gerd Hoffmann:
>> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
>> +	.destroy = drm_encoder_cleanup,
>> +};
>> +
>> +/**
>> + * drm_simple_encoder_init - Init a preallocated encoder
>> + * @dev: drm device
>> + * @funcs: callbacks for this encoder
>> + * @encoder_type: user visible type of the encoder
>> + * @name: printf style format string for the encoder name, or NULL
>> + *        for default name
>> + *
>> + * Initialises a preallocated encoder that has no further functionality. The
>> + * encoder will be released automatically.
>> + *
>> + * Returns:
>> + * Zero on success, error code on failure.
>> + */
>> +int drm_simple_encoder_init(struct drm_device *dev,
>> +			    struct drm_encoder *encoder,
>> +			    int encoder_type, const char *name, ...)
> 
> How about using
> 
> #define drm_simple_encoder_init(dev, type, name, ...) \
>         drm_encoder_init(dev, drm_simple_encoder_funcs_cleanup, type, name, __VA_ARGS__)
> 
> instead ?

I'd prefer a function call for aesthetic reasons and for not having to
export the drm_simple_encoder_funcs_cleanup. drm_simple_encoder_create()
is also a function and probably cannot be turned into a macro. So having
a function for drm_simple_encoder_init seems consequent.

I guess you want to save a few lines in the implementation of
drm_simple_encoder_init() (?) If so, I'd rather try to share more
internal code among the various init and create functions.

Best regards
Thomas

> 
> cheers,
>   Gerd
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


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_______________________________________________
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Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Thomas Zimmermann]

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Hi Gerd

Am 07.02.20 um 11:33 schrieb Gerd Hoffmann:
>> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
>> +	.destroy = drm_encoder_cleanup,
>> +};
>> +
>> +/**
>> + * drm_simple_encoder_init - Init a preallocated encoder
>> + * @dev: drm device
>> + * @funcs: callbacks for this encoder
>> + * @encoder_type: user visible type of the encoder
>> + * @name: printf style format string for the encoder name, or NULL
>> + *        for default name
>> + *
>> + * Initialises a preallocated encoder that has no further functionality. The
>> + * encoder will be released automatically.
>> + *
>> + * Returns:
>> + * Zero on success, error code on failure.
>> + */
>> +int drm_simple_encoder_init(struct drm_device *dev,
>> +			    struct drm_encoder *encoder,
>> +			    int encoder_type, const char *name, ...)
> 
> How about using
> 
> #define drm_simple_encoder_init(dev, type, name, ...) \
>         drm_encoder_init(dev, drm_simple_encoder_funcs_cleanup, type, name, __VA_ARGS__)
> 
> instead ?

I'd prefer a function call for aesthetic reasons and for not having to
export the drm_simple_encoder_funcs_cleanup. drm_simple_encoder_create()
is also a function and probably cannot be turned into a macro. So having
a function for drm_simple_encoder_init seems consequent.

I guess you want to save a few lines in the implementation of
drm_simple_encoder_init() (?) If so, I'd rather try to share more
internal code among the various init and create functions.

Best regards
Thomas

> 
> cheers,
>   Gerd
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


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Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Gerd Hoffmann]

> > How about using
> > 
> > #define drm_simple_encoder_init(dev, type, name, ...) \
> >         drm_encoder_init(dev, drm_simple_encoder_funcs_cleanup, type, name, __VA_ARGS__)
> > 
> > instead ?

> I guess you want to save a few lines in the implementation of
> drm_simple_encoder_init() (?) If so, I'd rather try to share more
> internal code among the various init and create functions.

Yes.  You have the namestr stuff duplicated in all functions, and with
a #define that goes away.

But maybe that can be simply be dropped?  The drivers with a simple
encoder seem to not care much about the name and just pass NULL ...

cheers,
  Gerd

Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Gerd Hoffmann]

> > How about using
> > 
> > #define drm_simple_encoder_init(dev, type, name, ...) \
> >         drm_encoder_init(dev, drm_simple_encoder_funcs_cleanup, type, name, __VA_ARGS__)
> > 
> > instead ?

> I guess you want to save a few lines in the implementation of
> drm_simple_encoder_init() (?) If so, I'd rather try to share more
> internal code among the various init and create functions.

Yes.  You have the namestr stuff duplicated in all functions, and with
a #define that goes away.

But maybe that can be simply be dropped?  The drivers with a simple
encoder seem to not care much about the name and just pass NULL ...

cheers,
  Gerd

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Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Daniel Vetter]

On Fri, Feb 07, 2020 at 09:41:31AM +0100, Thomas Zimmermann wrote:
> The simple-encoder helpers initialize an encoder with an empty
> implementation. This covers the requirements of most of the existing
> DRM drivers. A call to drm_simple_encoder_create() allocates and
> initializes an encoder instance, a call to drm_simple_encoder_init()
> initializes a pre-allocated instance.
> 
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

This has quick a bit midlayer taste to it ... I think having this as a
helper would be cleaner ...

The other bit is drm_encoder->possible_crtcs. If we do create a helper for
these, lets at least try to make them not suck too badly :-) Otherwise I
guess it would be time to officially document what exactly possible_crtcs
== 0 means from an uabi pov.
-Daniel

> ---
>  drivers/gpu/drm/drm_encoder.c | 116 ++++++++++++++++++++++++++++++++++
>  include/drm/drm_encoder.h     |  10 +++
>  2 files changed, 126 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
> index ffe691a1bf34..1a65cab1f310 100644
> --- a/drivers/gpu/drm/drm_encoder.c
> +++ b/drivers/gpu/drm/drm_encoder.c
> @@ -178,6 +178,122 @@ int drm_encoder_init(struct drm_device *dev,
>  }
>  EXPORT_SYMBOL(drm_encoder_init);
>  
> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
> +	.destroy = drm_encoder_cleanup,
> +};
> +
> +/**
> + * drm_simple_encoder_init - Init a preallocated encoder
> + * @dev: drm device
> + * @funcs: callbacks for this encoder
> + * @encoder_type: user visible type of the encoder
> + * @name: printf style format string for the encoder name, or NULL
> + *        for default name
> + *
> + * Initialises a preallocated encoder that has no further functionality. The
> + * encoder will be released automatically.
> + *
> + * Returns:
> + * Zero on success, error code on failure.
> + */
> +int drm_simple_encoder_init(struct drm_device *dev,
> +			    struct drm_encoder *encoder,
> +			    int encoder_type, const char *name, ...)
> +{
> +	char *namestr = NULL;
> +	int ret;
> +
> +	if (name) {
> +		va_list ap;
> +
> +		va_start(ap, name);
> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
> +		va_end(ap);
> +		if (!namestr)
> +			return -ENOMEM;
> +	}
> +
> +	ret = __drm_encoder_init(dev, encoder,
> +				 &drm_simple_encoder_funcs_cleanup,
> +				 encoder_type, namestr);
> +	if (ret)
> +		goto err_kfree;
> +
> +	return 0;
> +
> +err_kfree:
> +	if (name)
> +		kfree(namestr);
> +	return ret;
> +}
> +EXPORT_SYMBOL(drm_simple_encoder_init);
> +
> +static void drm_encoder_destroy(struct drm_encoder *encoder)
> +{
> +	struct drm_device *dev = encoder->dev;
> +
> +	drm_encoder_cleanup(encoder);
> +	devm_kfree(dev->dev, encoder);
> +}
> +
> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_destroy = {
> +	.destroy = drm_encoder_destroy,
> +};
> +
> +/**
> + * drm_simple_encoder_create - Allocate and initialize an encoder
> + * @dev: drm device
> + * @encoder_type: user visible type of the encoder
> + * @name: printf style format string for the encoder name, or NULL for
> + *        default name
> + *
> + * Allocates and initialises an encoder that has no further functionality. The
> + * encoder will be released automatically.
> + *
> + * Returns:
> + * The encoder on success, a pointer-encoder error code on failure.
> + */
> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
> +					      int encoder_type,
> +					      const char *name, ...)
> +{
> +	char *namestr = NULL;
> +	struct drm_encoder *encoder;
> +	int ret;
> +
> +	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
> +	if (!encoder)
> +		return ERR_PTR(-ENOMEM);
> +
> +	if (name) {
> +		va_list ap;
> +
> +		va_start(ap, name);
> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
> +		va_end(ap);
> +		if (!namestr) {
> +			ret = -ENOMEM;
> +			goto err_devm_kfree;
> +		}
> +	}
> +
> +	ret = __drm_encoder_init(dev, encoder,
> +				 &drm_simple_encoder_funcs_destroy,
> +				 encoder_type, namestr);
> +	if (ret)
> +		goto err_kfree;
> +
> +	return encoder;
> +
> +err_kfree:
> +	if (name)
> +		kfree(namestr);
> +err_devm_kfree:
> +	devm_kfree(dev->dev, encoder);
> +	return ERR_PTR(ret);
> +}
> +EXPORT_SYMBOL(drm_simple_encoder_create);
> +
>  /**
>   * drm_encoder_cleanup - cleans up an initialised encoder
>   * @encoder: encoder to cleanup
> diff --git a/include/drm/drm_encoder.h b/include/drm/drm_encoder.h
> index 5623994b6e9e..0214f6cf9de6 100644
> --- a/include/drm/drm_encoder.h
> +++ b/include/drm/drm_encoder.h
> @@ -190,6 +190,16 @@ int drm_encoder_init(struct drm_device *dev,
>  		     const struct drm_encoder_funcs *funcs,
>  		     int encoder_type, const char *name, ...);
>  
> +__printf(4, 5)
> +int drm_simple_encoder_init(struct drm_device *dev,
> +			    struct drm_encoder *encoder,
> +			    int encoder_type, const char *name, ...);
> +
> +__printf(3, 4)
> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
> +					      int encoder_type,
> +					      const char *name, ...);
> +
>  /**
>   * drm_encoder_index - find the index of a registered encoder
>   * @encoder: encoder to find index for
> -- 
> 2.25.0
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Daniel Vetter]

On Fri, Feb 07, 2020 at 09:41:31AM +0100, Thomas Zimmermann wrote:
> The simple-encoder helpers initialize an encoder with an empty
> implementation. This covers the requirements of most of the existing
> DRM drivers. A call to drm_simple_encoder_create() allocates and
> initializes an encoder instance, a call to drm_simple_encoder_init()
> initializes a pre-allocated instance.
> 
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

This has quick a bit midlayer taste to it ... I think having this as a
helper would be cleaner ...

The other bit is drm_encoder->possible_crtcs. If we do create a helper for
these, lets at least try to make them not suck too badly :-) Otherwise I
guess it would be time to officially document what exactly possible_crtcs
== 0 means from an uabi pov.
-Daniel

> ---
>  drivers/gpu/drm/drm_encoder.c | 116 ++++++++++++++++++++++++++++++++++
>  include/drm/drm_encoder.h     |  10 +++
>  2 files changed, 126 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
> index ffe691a1bf34..1a65cab1f310 100644
> --- a/drivers/gpu/drm/drm_encoder.c
> +++ b/drivers/gpu/drm/drm_encoder.c
> @@ -178,6 +178,122 @@ int drm_encoder_init(struct drm_device *dev,
>  }
>  EXPORT_SYMBOL(drm_encoder_init);
>  
> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
> +	.destroy = drm_encoder_cleanup,
> +};
> +
> +/**
> + * drm_simple_encoder_init - Init a preallocated encoder
> + * @dev: drm device
> + * @funcs: callbacks for this encoder
> + * @encoder_type: user visible type of the encoder
> + * @name: printf style format string for the encoder name, or NULL
> + *        for default name
> + *
> + * Initialises a preallocated encoder that has no further functionality. The
> + * encoder will be released automatically.
> + *
> + * Returns:
> + * Zero on success, error code on failure.
> + */
> +int drm_simple_encoder_init(struct drm_device *dev,
> +			    struct drm_encoder *encoder,
> +			    int encoder_type, const char *name, ...)
> +{
> +	char *namestr = NULL;
> +	int ret;
> +
> +	if (name) {
> +		va_list ap;
> +
> +		va_start(ap, name);
> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
> +		va_end(ap);
> +		if (!namestr)
> +			return -ENOMEM;
> +	}
> +
> +	ret = __drm_encoder_init(dev, encoder,
> +				 &drm_simple_encoder_funcs_cleanup,
> +				 encoder_type, namestr);
> +	if (ret)
> +		goto err_kfree;
> +
> +	return 0;
> +
> +err_kfree:
> +	if (name)
> +		kfree(namestr);
> +	return ret;
> +}
> +EXPORT_SYMBOL(drm_simple_encoder_init);
> +
> +static void drm_encoder_destroy(struct drm_encoder *encoder)
> +{
> +	struct drm_device *dev = encoder->dev;
> +
> +	drm_encoder_cleanup(encoder);
> +	devm_kfree(dev->dev, encoder);
> +}
> +
> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_destroy = {
> +	.destroy = drm_encoder_destroy,
> +};
> +
> +/**
> + * drm_simple_encoder_create - Allocate and initialize an encoder
> + * @dev: drm device
> + * @encoder_type: user visible type of the encoder
> + * @name: printf style format string for the encoder name, or NULL for
> + *        default name
> + *
> + * Allocates and initialises an encoder that has no further functionality. The
> + * encoder will be released automatically.
> + *
> + * Returns:
> + * The encoder on success, a pointer-encoder error code on failure.
> + */
> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
> +					      int encoder_type,
> +					      const char *name, ...)
> +{
> +	char *namestr = NULL;
> +	struct drm_encoder *encoder;
> +	int ret;
> +
> +	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
> +	if (!encoder)
> +		return ERR_PTR(-ENOMEM);
> +
> +	if (name) {
> +		va_list ap;
> +
> +		va_start(ap, name);
> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
> +		va_end(ap);
> +		if (!namestr) {
> +			ret = -ENOMEM;
> +			goto err_devm_kfree;
> +		}
> +	}
> +
> +	ret = __drm_encoder_init(dev, encoder,
> +				 &drm_simple_encoder_funcs_destroy,
> +				 encoder_type, namestr);
> +	if (ret)
> +		goto err_kfree;
> +
> +	return encoder;
> +
> +err_kfree:
> +	if (name)
> +		kfree(namestr);
> +err_devm_kfree:
> +	devm_kfree(dev->dev, encoder);
> +	return ERR_PTR(ret);
> +}
> +EXPORT_SYMBOL(drm_simple_encoder_create);
> +
>  /**
>   * drm_encoder_cleanup - cleans up an initialised encoder
>   * @encoder: encoder to cleanup
> diff --git a/include/drm/drm_encoder.h b/include/drm/drm_encoder.h
> index 5623994b6e9e..0214f6cf9de6 100644
> --- a/include/drm/drm_encoder.h
> +++ b/include/drm/drm_encoder.h
> @@ -190,6 +190,16 @@ int drm_encoder_init(struct drm_device *dev,
>  		     const struct drm_encoder_funcs *funcs,
>  		     int encoder_type, const char *name, ...);
>  
> +__printf(4, 5)
> +int drm_simple_encoder_init(struct drm_device *dev,
> +			    struct drm_encoder *encoder,
> +			    int encoder_type, const char *name, ...);
> +
> +__printf(3, 4)
> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
> +					      int encoder_type,
> +					      const char *name, ...);
> +
>  /**
>   * drm_encoder_index - find the index of a registered encoder
>   * @encoder: encoder to find index for
> -- 
> 2.25.0
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Ville Syrjälä]

On Fri, Feb 07, 2020 at 02:37:20PM +0100, Daniel Vetter wrote:
> On Fri, Feb 07, 2020 at 09:41:31AM +0100, Thomas Zimmermann wrote:
> > The simple-encoder helpers initialize an encoder with an empty
> > implementation. This covers the requirements of most of the existing
> > DRM drivers. A call to drm_simple_encoder_create() allocates and
> > initializes an encoder instance, a call to drm_simple_encoder_init()
> > initializes a pre-allocated instance.
> > 
> > Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> 
> This has quick a bit midlayer taste to it ... I think having this as a
> helper would be cleaner ...
> 
> The other bit is drm_encoder->possible_crtcs. If we do create a helper for
> these, lets at least try to make them not suck too badly :-) Otherwise I
> guess it would be time to officially document what exactly possible_crtcs
> == 0 means from an uabi pov.

I had some improvements for this stuff. Just re-sent the remainder.

-- 
Ville Syrjälä
Intel

Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Ville Syrjälä]

On Fri, Feb 07, 2020 at 02:37:20PM +0100, Daniel Vetter wrote:
> On Fri, Feb 07, 2020 at 09:41:31AM +0100, Thomas Zimmermann wrote:
> > The simple-encoder helpers initialize an encoder with an empty
> > implementation. This covers the requirements of most of the existing
> > DRM drivers. A call to drm_simple_encoder_create() allocates and
> > initializes an encoder instance, a call to drm_simple_encoder_init()
> > initializes a pre-allocated instance.
> > 
> > Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> 
> This has quick a bit midlayer taste to it ... I think having this as a
> helper would be cleaner ...
> 
> The other bit is drm_encoder->possible_crtcs. If we do create a helper for
> these, lets at least try to make them not suck too badly :-) Otherwise I
> guess it would be time to officially document what exactly possible_crtcs
> == 0 means from an uabi pov.

I had some improvements for this stuff. Just re-sent the remainder.

-- 
Ville Syrjälä
Intel
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Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Thomas Zimmermann]

[-- Attachment #1.1.1: Type: text/plain, Size: 5879 bytes --]

Hi

Am 07.02.20 um 14:37 schrieb Daniel Vetter:
> On Fri, Feb 07, 2020 at 09:41:31AM +0100, Thomas Zimmermann wrote:
>> The simple-encoder helpers initialize an encoder with an empty
>> implementation. This covers the requirements of most of the existing
>> DRM drivers. A call to drm_simple_encoder_create() allocates and
>> initializes an encoder instance, a call to drm_simple_encoder_init()
>> initializes a pre-allocated instance.
>>
>> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> 
> This has quick a bit midlayer taste to it ... I think having this as a
> helper would be cleaner ...

How would such a helper roughly look like?

Best regards
Thomas

> 
> The other bit is drm_encoder->possible_crtcs. If we do create a helper for
> these, lets at least try to make them not suck too badly :-) Otherwise I
> guess it would be time to officially document what exactly possible_crtcs
> == 0 means from an uabi pov.
> -Daniel
> 
>> ---
>>  drivers/gpu/drm/drm_encoder.c | 116 ++++++++++++++++++++++++++++++++++
>>  include/drm/drm_encoder.h     |  10 +++
>>  2 files changed, 126 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
>> index ffe691a1bf34..1a65cab1f310 100644
>> --- a/drivers/gpu/drm/drm_encoder.c
>> +++ b/drivers/gpu/drm/drm_encoder.c
>> @@ -178,6 +178,122 @@ int drm_encoder_init(struct drm_device *dev,
>>  }
>>  EXPORT_SYMBOL(drm_encoder_init);
>>  
>> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
>> +	.destroy = drm_encoder_cleanup,
>> +};
>> +
>> +/**
>> + * drm_simple_encoder_init - Init a preallocated encoder
>> + * @dev: drm device
>> + * @funcs: callbacks for this encoder
>> + * @encoder_type: user visible type of the encoder
>> + * @name: printf style format string for the encoder name, or NULL
>> + *        for default name
>> + *
>> + * Initialises a preallocated encoder that has no further functionality. The
>> + * encoder will be released automatically.
>> + *
>> + * Returns:
>> + * Zero on success, error code on failure.
>> + */
>> +int drm_simple_encoder_init(struct drm_device *dev,
>> +			    struct drm_encoder *encoder,
>> +			    int encoder_type, const char *name, ...)
>> +{
>> +	char *namestr = NULL;
>> +	int ret;
>> +
>> +	if (name) {
>> +		va_list ap;
>> +
>> +		va_start(ap, name);
>> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
>> +		va_end(ap);
>> +		if (!namestr)
>> +			return -ENOMEM;
>> +	}
>> +
>> +	ret = __drm_encoder_init(dev, encoder,
>> +				 &drm_simple_encoder_funcs_cleanup,
>> +				 encoder_type, namestr);
>> +	if (ret)
>> +		goto err_kfree;
>> +
>> +	return 0;
>> +
>> +err_kfree:
>> +	if (name)
>> +		kfree(namestr);
>> +	return ret;
>> +}
>> +EXPORT_SYMBOL(drm_simple_encoder_init);
>> +
>> +static void drm_encoder_destroy(struct drm_encoder *encoder)
>> +{
>> +	struct drm_device *dev = encoder->dev;
>> +
>> +	drm_encoder_cleanup(encoder);
>> +	devm_kfree(dev->dev, encoder);
>> +}
>> +
>> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_destroy = {
>> +	.destroy = drm_encoder_destroy,
>> +};
>> +
>> +/**
>> + * drm_simple_encoder_create - Allocate and initialize an encoder
>> + * @dev: drm device
>> + * @encoder_type: user visible type of the encoder
>> + * @name: printf style format string for the encoder name, or NULL for
>> + *        default name
>> + *
>> + * Allocates and initialises an encoder that has no further functionality. The
>> + * encoder will be released automatically.
>> + *
>> + * Returns:
>> + * The encoder on success, a pointer-encoder error code on failure.
>> + */
>> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
>> +					      int encoder_type,
>> +					      const char *name, ...)
>> +{
>> +	char *namestr = NULL;
>> +	struct drm_encoder *encoder;
>> +	int ret;
>> +
>> +	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
>> +	if (!encoder)
>> +		return ERR_PTR(-ENOMEM);
>> +
>> +	if (name) {
>> +		va_list ap;
>> +
>> +		va_start(ap, name);
>> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
>> +		va_end(ap);
>> +		if (!namestr) {
>> +			ret = -ENOMEM;
>> +			goto err_devm_kfree;
>> +		}
>> +	}
>> +
>> +	ret = __drm_encoder_init(dev, encoder,
>> +				 &drm_simple_encoder_funcs_destroy,
>> +				 encoder_type, namestr);
>> +	if (ret)
>> +		goto err_kfree;
>> +
>> +	return encoder;
>> +
>> +err_kfree:
>> +	if (name)
>> +		kfree(namestr);
>> +err_devm_kfree:
>> +	devm_kfree(dev->dev, encoder);
>> +	return ERR_PTR(ret);
>> +}
>> +EXPORT_SYMBOL(drm_simple_encoder_create);
>> +
>>  /**
>>   * drm_encoder_cleanup - cleans up an initialised encoder
>>   * @encoder: encoder to cleanup
>> diff --git a/include/drm/drm_encoder.h b/include/drm/drm_encoder.h
>> index 5623994b6e9e..0214f6cf9de6 100644
>> --- a/include/drm/drm_encoder.h
>> +++ b/include/drm/drm_encoder.h
>> @@ -190,6 +190,16 @@ int drm_encoder_init(struct drm_device *dev,
>>  		     const struct drm_encoder_funcs *funcs,
>>  		     int encoder_type, const char *name, ...);
>>  
>> +__printf(4, 5)
>> +int drm_simple_encoder_init(struct drm_device *dev,
>> +			    struct drm_encoder *encoder,
>> +			    int encoder_type, const char *name, ...);
>> +
>> +__printf(3, 4)
>> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
>> +					      int encoder_type,
>> +					      const char *name, ...);
>> +
>>  /**
>>   * drm_encoder_index - find the index of a registered encoder
>>   * @encoder: encoder to find index for
>> -- 
>> 2.25.0
>>
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


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Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Thomas Zimmermann]

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Hi

Am 07.02.20 um 14:37 schrieb Daniel Vetter:
> On Fri, Feb 07, 2020 at 09:41:31AM +0100, Thomas Zimmermann wrote:
>> The simple-encoder helpers initialize an encoder with an empty
>> implementation. This covers the requirements of most of the existing
>> DRM drivers. A call to drm_simple_encoder_create() allocates and
>> initializes an encoder instance, a call to drm_simple_encoder_init()
>> initializes a pre-allocated instance.
>>
>> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> 
> This has quick a bit midlayer taste to it ... I think having this as a
> helper would be cleaner ...

How would such a helper roughly look like?

Best regards
Thomas

> 
> The other bit is drm_encoder->possible_crtcs. If we do create a helper for
> these, lets at least try to make them not suck too badly :-) Otherwise I
> guess it would be time to officially document what exactly possible_crtcs
> == 0 means from an uabi pov.
> -Daniel
> 
>> ---
>>  drivers/gpu/drm/drm_encoder.c | 116 ++++++++++++++++++++++++++++++++++
>>  include/drm/drm_encoder.h     |  10 +++
>>  2 files changed, 126 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
>> index ffe691a1bf34..1a65cab1f310 100644
>> --- a/drivers/gpu/drm/drm_encoder.c
>> +++ b/drivers/gpu/drm/drm_encoder.c
>> @@ -178,6 +178,122 @@ int drm_encoder_init(struct drm_device *dev,
>>  }
>>  EXPORT_SYMBOL(drm_encoder_init);
>>  
>> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
>> +	.destroy = drm_encoder_cleanup,
>> +};
>> +
>> +/**
>> + * drm_simple_encoder_init - Init a preallocated encoder
>> + * @dev: drm device
>> + * @funcs: callbacks for this encoder
>> + * @encoder_type: user visible type of the encoder
>> + * @name: printf style format string for the encoder name, or NULL
>> + *        for default name
>> + *
>> + * Initialises a preallocated encoder that has no further functionality. The
>> + * encoder will be released automatically.
>> + *
>> + * Returns:
>> + * Zero on success, error code on failure.
>> + */
>> +int drm_simple_encoder_init(struct drm_device *dev,
>> +			    struct drm_encoder *encoder,
>> +			    int encoder_type, const char *name, ...)
>> +{
>> +	char *namestr = NULL;
>> +	int ret;
>> +
>> +	if (name) {
>> +		va_list ap;
>> +
>> +		va_start(ap, name);
>> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
>> +		va_end(ap);
>> +		if (!namestr)
>> +			return -ENOMEM;
>> +	}
>> +
>> +	ret = __drm_encoder_init(dev, encoder,
>> +				 &drm_simple_encoder_funcs_cleanup,
>> +				 encoder_type, namestr);
>> +	if (ret)
>> +		goto err_kfree;
>> +
>> +	return 0;
>> +
>> +err_kfree:
>> +	if (name)
>> +		kfree(namestr);
>> +	return ret;
>> +}
>> +EXPORT_SYMBOL(drm_simple_encoder_init);
>> +
>> +static void drm_encoder_destroy(struct drm_encoder *encoder)
>> +{
>> +	struct drm_device *dev = encoder->dev;
>> +
>> +	drm_encoder_cleanup(encoder);
>> +	devm_kfree(dev->dev, encoder);
>> +}
>> +
>> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_destroy = {
>> +	.destroy = drm_encoder_destroy,
>> +};
>> +
>> +/**
>> + * drm_simple_encoder_create - Allocate and initialize an encoder
>> + * @dev: drm device
>> + * @encoder_type: user visible type of the encoder
>> + * @name: printf style format string for the encoder name, or NULL for
>> + *        default name
>> + *
>> + * Allocates and initialises an encoder that has no further functionality. The
>> + * encoder will be released automatically.
>> + *
>> + * Returns:
>> + * The encoder on success, a pointer-encoder error code on failure.
>> + */
>> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
>> +					      int encoder_type,
>> +					      const char *name, ...)
>> +{
>> +	char *namestr = NULL;
>> +	struct drm_encoder *encoder;
>> +	int ret;
>> +
>> +	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
>> +	if (!encoder)
>> +		return ERR_PTR(-ENOMEM);
>> +
>> +	if (name) {
>> +		va_list ap;
>> +
>> +		va_start(ap, name);
>> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
>> +		va_end(ap);
>> +		if (!namestr) {
>> +			ret = -ENOMEM;
>> +			goto err_devm_kfree;
>> +		}
>> +	}
>> +
>> +	ret = __drm_encoder_init(dev, encoder,
>> +				 &drm_simple_encoder_funcs_destroy,
>> +				 encoder_type, namestr);
>> +	if (ret)
>> +		goto err_kfree;
>> +
>> +	return encoder;
>> +
>> +err_kfree:
>> +	if (name)
>> +		kfree(namestr);
>> +err_devm_kfree:
>> +	devm_kfree(dev->dev, encoder);
>> +	return ERR_PTR(ret);
>> +}
>> +EXPORT_SYMBOL(drm_simple_encoder_create);
>> +
>>  /**
>>   * drm_encoder_cleanup - cleans up an initialised encoder
>>   * @encoder: encoder to cleanup
>> diff --git a/include/drm/drm_encoder.h b/include/drm/drm_encoder.h
>> index 5623994b6e9e..0214f6cf9de6 100644
>> --- a/include/drm/drm_encoder.h
>> +++ b/include/drm/drm_encoder.h
>> @@ -190,6 +190,16 @@ int drm_encoder_init(struct drm_device *dev,
>>  		     const struct drm_encoder_funcs *funcs,
>>  		     int encoder_type, const char *name, ...);
>>  
>> +__printf(4, 5)
>> +int drm_simple_encoder_init(struct drm_device *dev,
>> +			    struct drm_encoder *encoder,
>> +			    int encoder_type, const char *name, ...);
>> +
>> +__printf(3, 4)
>> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
>> +					      int encoder_type,
>> +					      const char *name, ...);
>> +
>>  /**
>>   * drm_encoder_index - find the index of a registered encoder
>>   * @encoder: encoder to find index for
>> -- 
>> 2.25.0
>>
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


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Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Noralf Trønnes]

Den 07.02.2020 09.41, skrev Thomas Zimmermann:
> The simple-encoder helpers initialize an encoder with an empty
> implementation. This covers the requirements of most of the existing
> DRM drivers. A call to drm_simple_encoder_create() allocates and
> initializes an encoder instance, a call to drm_simple_encoder_init()
> initializes a pre-allocated instance.
> 
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> ---
>  drivers/gpu/drm/drm_encoder.c | 116 ++++++++++++++++++++++++++++++++++
>  include/drm/drm_encoder.h     |  10 +++
>  2 files changed, 126 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c

<snip>

> +/**
> + * drm_simple_encoder_create - Allocate and initialize an encoder
> + * @dev: drm device
> + * @encoder_type: user visible type of the encoder
> + * @name: printf style format string for the encoder name, or NULL for
> + *        default name
> + *
> + * Allocates and initialises an encoder that has no further functionality. The
> + * encoder will be released automatically.
> + *
> + * Returns:
> + * The encoder on success, a pointer-encoder error code on failure.
> + */
> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
> +					      int encoder_type,
> +					      const char *name, ...)
> +{
> +	char *namestr = NULL;
> +	struct drm_encoder *encoder;
> +	int ret;
> +
> +	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);

The encoder can outlive the devres if the device is unbound when
userspace has open fds, so you can't use devm_ here.

Noralf.

> +	if (!encoder)
> +		return ERR_PTR(-ENOMEM);
> +
> +	if (name) {
> +		va_list ap;
> +
> +		va_start(ap, name);
> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
> +		va_end(ap);
> +		if (!namestr) {
> +			ret = -ENOMEM;
> +			goto err_devm_kfree;
> +		}
> +	}
> +
> +	ret = __drm_encoder_init(dev, encoder,
> +				 &drm_simple_encoder_funcs_destroy,
> +				 encoder_type, namestr);
> +	if (ret)
> +		goto err_kfree;
> +
> +	return encoder;
> +
> +err_kfree:
> +	if (name)
> +		kfree(namestr);
> +err_devm_kfree:
> +	devm_kfree(dev->dev, encoder);
> +	return ERR_PTR(ret);
> +}
> +EXPORT_SYMBOL(drm_simple_encoder_create);
> +

Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Noralf Trønnes]

Den 07.02.2020 09.41, skrev Thomas Zimmermann:
> The simple-encoder helpers initialize an encoder with an empty
> implementation. This covers the requirements of most of the existing
> DRM drivers. A call to drm_simple_encoder_create() allocates and
> initializes an encoder instance, a call to drm_simple_encoder_init()
> initializes a pre-allocated instance.
> 
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> ---
>  drivers/gpu/drm/drm_encoder.c | 116 ++++++++++++++++++++++++++++++++++
>  include/drm/drm_encoder.h     |  10 +++
>  2 files changed, 126 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c

<snip>

> +/**
> + * drm_simple_encoder_create - Allocate and initialize an encoder
> + * @dev: drm device
> + * @encoder_type: user visible type of the encoder
> + * @name: printf style format string for the encoder name, or NULL for
> + *        default name
> + *
> + * Allocates and initialises an encoder that has no further functionality. The
> + * encoder will be released automatically.
> + *
> + * Returns:
> + * The encoder on success, a pointer-encoder error code on failure.
> + */
> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
> +					      int encoder_type,
> +					      const char *name, ...)
> +{
> +	char *namestr = NULL;
> +	struct drm_encoder *encoder;
> +	int ret;
> +
> +	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);

The encoder can outlive the devres if the device is unbound when
userspace has open fds, so you can't use devm_ here.

Noralf.

> +	if (!encoder)
> +		return ERR_PTR(-ENOMEM);
> +
> +	if (name) {
> +		va_list ap;
> +
> +		va_start(ap, name);
> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
> +		va_end(ap);
> +		if (!namestr) {
> +			ret = -ENOMEM;
> +			goto err_devm_kfree;
> +		}
> +	}
> +
> +	ret = __drm_encoder_init(dev, encoder,
> +				 &drm_simple_encoder_funcs_destroy,
> +				 encoder_type, namestr);
> +	if (ret)
> +		goto err_kfree;
> +
> +	return encoder;
> +
> +err_kfree:
> +	if (name)
> +		kfree(namestr);
> +err_devm_kfree:
> +	devm_kfree(dev->dev, encoder);
> +	return ERR_PTR(ret);
> +}
> +EXPORT_SYMBOL(drm_simple_encoder_create);
> +
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Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Daniel Vetter]

On Fri, Feb 07, 2020 at 03:36:49PM +0100, Noralf Trønnes wrote:
> 
> 
> Den 07.02.2020 09.41, skrev Thomas Zimmermann:
> > The simple-encoder helpers initialize an encoder with an empty
> > implementation. This covers the requirements of most of the existing
> > DRM drivers. A call to drm_simple_encoder_create() allocates and
> > initializes an encoder instance, a call to drm_simple_encoder_init()
> > initializes a pre-allocated instance.
> > 
> > Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> > ---
> >  drivers/gpu/drm/drm_encoder.c | 116 ++++++++++++++++++++++++++++++++++
> >  include/drm/drm_encoder.h     |  10 +++
> >  2 files changed, 126 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
> 
> <snip>
> 
> > +/**
> > + * drm_simple_encoder_create - Allocate and initialize an encoder
> > + * @dev: drm device
> > + * @encoder_type: user visible type of the encoder
> > + * @name: printf style format string for the encoder name, or NULL for
> > + *        default name
> > + *
> > + * Allocates and initialises an encoder that has no further functionality. The
> > + * encoder will be released automatically.
> > + *
> > + * Returns:
> > + * The encoder on success, a pointer-encoder error code on failure.
> > + */
> > +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
> > +					      int encoder_type,
> > +					      const char *name, ...)
> > +{
> > +	char *namestr = NULL;
> > +	struct drm_encoder *encoder;
> > +	int ret;
> > +
> > +	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
> 
> The encoder can outlive the devres if the device is unbound when
> userspace has open fds, so you can't use devm_ here.

Ah yes great catch. Rule of thumb: Never use devm_ for any drm_*
structure. It's wrong.

There's a todo somewhere to essentially create a drm_managed set of apis
where the cleanup matches the right lifetime - we need to only
free/release drm resource at drm_driver->release time.
-Daniel

> 
> Noralf.
> 
> > +	if (!encoder)
> > +		return ERR_PTR(-ENOMEM);
> > +
> > +	if (name) {
> > +		va_list ap;
> > +
> > +		va_start(ap, name);
> > +		namestr = kvasprintf(GFP_KERNEL, name, ap);
> > +		va_end(ap);
> > +		if (!namestr) {
> > +			ret = -ENOMEM;
> > +			goto err_devm_kfree;
> > +		}
> > +	}
> > +
> > +	ret = __drm_encoder_init(dev, encoder,
> > +				 &drm_simple_encoder_funcs_destroy,
> > +				 encoder_type, namestr);
> > +	if (ret)
> > +		goto err_kfree;
> > +
> > +	return encoder;
> > +
> > +err_kfree:
> > +	if (name)
> > +		kfree(namestr);
> > +err_devm_kfree:
> > +	devm_kfree(dev->dev, encoder);
> > +	return ERR_PTR(ret);
> > +}
> > +EXPORT_SYMBOL(drm_simple_encoder_create);
> > +

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Daniel Vetter]

On Fri, Feb 07, 2020 at 03:36:49PM +0100, Noralf Trønnes wrote:
> 
> 
> Den 07.02.2020 09.41, skrev Thomas Zimmermann:
> > The simple-encoder helpers initialize an encoder with an empty
> > implementation. This covers the requirements of most of the existing
> > DRM drivers. A call to drm_simple_encoder_create() allocates and
> > initializes an encoder instance, a call to drm_simple_encoder_init()
> > initializes a pre-allocated instance.
> > 
> > Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> > ---
> >  drivers/gpu/drm/drm_encoder.c | 116 ++++++++++++++++++++++++++++++++++
> >  include/drm/drm_encoder.h     |  10 +++
> >  2 files changed, 126 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
> 
> <snip>
> 
> > +/**
> > + * drm_simple_encoder_create - Allocate and initialize an encoder
> > + * @dev: drm device
> > + * @encoder_type: user visible type of the encoder
> > + * @name: printf style format string for the encoder name, or NULL for
> > + *        default name
> > + *
> > + * Allocates and initialises an encoder that has no further functionality. The
> > + * encoder will be released automatically.
> > + *
> > + * Returns:
> > + * The encoder on success, a pointer-encoder error code on failure.
> > + */
> > +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
> > +					      int encoder_type,
> > +					      const char *name, ...)
> > +{
> > +	char *namestr = NULL;
> > +	struct drm_encoder *encoder;
> > +	int ret;
> > +
> > +	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
> 
> The encoder can outlive the devres if the device is unbound when
> userspace has open fds, so you can't use devm_ here.

Ah yes great catch. Rule of thumb: Never use devm_ for any drm_*
structure. It's wrong.

There's a todo somewhere to essentially create a drm_managed set of apis
where the cleanup matches the right lifetime - we need to only
free/release drm resource at drm_driver->release time.
-Daniel

> 
> Noralf.
> 
> > +	if (!encoder)
> > +		return ERR_PTR(-ENOMEM);
> > +
> > +	if (name) {
> > +		va_list ap;
> > +
> > +		va_start(ap, name);
> > +		namestr = kvasprintf(GFP_KERNEL, name, ap);
> > +		va_end(ap);
> > +		if (!namestr) {
> > +			ret = -ENOMEM;
> > +			goto err_devm_kfree;
> > +		}
> > +	}
> > +
> > +	ret = __drm_encoder_init(dev, encoder,
> > +				 &drm_simple_encoder_funcs_destroy,
> > +				 encoder_type, namestr);
> > +	if (ret)
> > +		goto err_kfree;
> > +
> > +	return encoder;
> > +
> > +err_kfree:
> > +	if (name)
> > +		kfree(namestr);
> > +err_devm_kfree:
> > +	devm_kfree(dev->dev, encoder);
> > +	return ERR_PTR(ret);
> > +}
> > +EXPORT_SYMBOL(drm_simple_encoder_create);
> > +

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Daniel Vetter]

On Fri, Feb 07, 2020 at 03:02:00PM +0100, Thomas Zimmermann wrote:
> Hi
> 
> Am 07.02.20 um 14:37 schrieb Daniel Vetter:
> > On Fri, Feb 07, 2020 at 09:41:31AM +0100, Thomas Zimmermann wrote:
> >> The simple-encoder helpers initialize an encoder with an empty
> >> implementation. This covers the requirements of most of the existing
> >> DRM drivers. A call to drm_simple_encoder_create() allocates and
> >> initializes an encoder instance, a call to drm_simple_encoder_init()
> >> initializes a pre-allocated instance.
> >>
> >> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> > 
> > This has quick a bit midlayer taste to it ... I think having this as a
> > helper would be cleaner ...
> 
> How would such a helper roughly look like?

Essentially same code, but stuff the helper into drm-kms-helper.ko, then
make sure it still works. The separate kernel module makes sure that the
drm core and helper stuff aren't too close friends with each another :-)
Essentially like the simple display pipe helpers.
-Daniel

> 
> Best regards
> Thomas
> 
> > 
> > The other bit is drm_encoder->possible_crtcs. If we do create a helper for
> > these, lets at least try to make them not suck too badly :-) Otherwise I
> > guess it would be time to officially document what exactly possible_crtcs
> > == 0 means from an uabi pov.
> > -Daniel
> > 
> >> ---
> >>  drivers/gpu/drm/drm_encoder.c | 116 ++++++++++++++++++++++++++++++++++
> >>  include/drm/drm_encoder.h     |  10 +++
> >>  2 files changed, 126 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
> >> index ffe691a1bf34..1a65cab1f310 100644
> >> --- a/drivers/gpu/drm/drm_encoder.c
> >> +++ b/drivers/gpu/drm/drm_encoder.c
> >> @@ -178,6 +178,122 @@ int drm_encoder_init(struct drm_device *dev,
> >>  }
> >>  EXPORT_SYMBOL(drm_encoder_init);
> >>  
> >> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
> >> +	.destroy = drm_encoder_cleanup,
> >> +};
> >> +
> >> +/**
> >> + * drm_simple_encoder_init - Init a preallocated encoder
> >> + * @dev: drm device
> >> + * @funcs: callbacks for this encoder
> >> + * @encoder_type: user visible type of the encoder
> >> + * @name: printf style format string for the encoder name, or NULL
> >> + *        for default name
> >> + *
> >> + * Initialises a preallocated encoder that has no further functionality. The
> >> + * encoder will be released automatically.
> >> + *
> >> + * Returns:
> >> + * Zero on success, error code on failure.
> >> + */
> >> +int drm_simple_encoder_init(struct drm_device *dev,
> >> +			    struct drm_encoder *encoder,
> >> +			    int encoder_type, const char *name, ...)
> >> +{
> >> +	char *namestr = NULL;
> >> +	int ret;
> >> +
> >> +	if (name) {
> >> +		va_list ap;
> >> +
> >> +		va_start(ap, name);
> >> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
> >> +		va_end(ap);
> >> +		if (!namestr)
> >> +			return -ENOMEM;
> >> +	}
> >> +
> >> +	ret = __drm_encoder_init(dev, encoder,
> >> +				 &drm_simple_encoder_funcs_cleanup,
> >> +				 encoder_type, namestr);
> >> +	if (ret)
> >> +		goto err_kfree;
> >> +
> >> +	return 0;
> >> +
> >> +err_kfree:
> >> +	if (name)
> >> +		kfree(namestr);
> >> +	return ret;
> >> +}
> >> +EXPORT_SYMBOL(drm_simple_encoder_init);
> >> +
> >> +static void drm_encoder_destroy(struct drm_encoder *encoder)
> >> +{
> >> +	struct drm_device *dev = encoder->dev;
> >> +
> >> +	drm_encoder_cleanup(encoder);
> >> +	devm_kfree(dev->dev, encoder);
> >> +}
> >> +
> >> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_destroy = {
> >> +	.destroy = drm_encoder_destroy,
> >> +};
> >> +
> >> +/**
> >> + * drm_simple_encoder_create - Allocate and initialize an encoder
> >> + * @dev: drm device
> >> + * @encoder_type: user visible type of the encoder
> >> + * @name: printf style format string for the encoder name, or NULL for
> >> + *        default name
> >> + *
> >> + * Allocates and initialises an encoder that has no further functionality. The
> >> + * encoder will be released automatically.
> >> + *
> >> + * Returns:
> >> + * The encoder on success, a pointer-encoder error code on failure.
> >> + */
> >> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
> >> +					      int encoder_type,
> >> +					      const char *name, ...)
> >> +{
> >> +	char *namestr = NULL;
> >> +	struct drm_encoder *encoder;
> >> +	int ret;
> >> +
> >> +	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
> >> +	if (!encoder)
> >> +		return ERR_PTR(-ENOMEM);
> >> +
> >> +	if (name) {
> >> +		va_list ap;
> >> +
> >> +		va_start(ap, name);
> >> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
> >> +		va_end(ap);
> >> +		if (!namestr) {
> >> +			ret = -ENOMEM;
> >> +			goto err_devm_kfree;
> >> +		}
> >> +	}
> >> +
> >> +	ret = __drm_encoder_init(dev, encoder,
> >> +				 &drm_simple_encoder_funcs_destroy,
> >> +				 encoder_type, namestr);
> >> +	if (ret)
> >> +		goto err_kfree;
> >> +
> >> +	return encoder;
> >> +
> >> +err_kfree:
> >> +	if (name)
> >> +		kfree(namestr);
> >> +err_devm_kfree:
> >> +	devm_kfree(dev->dev, encoder);
> >> +	return ERR_PTR(ret);
> >> +}
> >> +EXPORT_SYMBOL(drm_simple_encoder_create);
> >> +
> >>  /**
> >>   * drm_encoder_cleanup - cleans up an initialised encoder
> >>   * @encoder: encoder to cleanup
> >> diff --git a/include/drm/drm_encoder.h b/include/drm/drm_encoder.h
> >> index 5623994b6e9e..0214f6cf9de6 100644
> >> --- a/include/drm/drm_encoder.h
> >> +++ b/include/drm/drm_encoder.h
> >> @@ -190,6 +190,16 @@ int drm_encoder_init(struct drm_device *dev,
> >>  		     const struct drm_encoder_funcs *funcs,
> >>  		     int encoder_type, const char *name, ...);
> >>  
> >> +__printf(4, 5)
> >> +int drm_simple_encoder_init(struct drm_device *dev,
> >> +			    struct drm_encoder *encoder,
> >> +			    int encoder_type, const char *name, ...);
> >> +
> >> +__printf(3, 4)
> >> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
> >> +					      int encoder_type,
> >> +					      const char *name, ...);
> >> +
> >>  /**
> >>   * drm_encoder_index - find the index of a registered encoder
> >>   * @encoder: encoder to find index for
> >> -- 
> >> 2.25.0
> >>
> > 
> 
> -- 
> Thomas Zimmermann
> Graphics Driver Developer
> SUSE Software Solutions Germany GmbH
> Maxfeldstr. 5, 90409 Nürnberg, Germany
> (HRB 36809, AG Nürnberg)
> Geschäftsführer: Felix Imendörffer
> 




-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[Daniel Vetter]

On Fri, Feb 07, 2020 at 03:02:00PM +0100, Thomas Zimmermann wrote:
> Hi
> 
> Am 07.02.20 um 14:37 schrieb Daniel Vetter:
> > On Fri, Feb 07, 2020 at 09:41:31AM +0100, Thomas Zimmermann wrote:
> >> The simple-encoder helpers initialize an encoder with an empty
> >> implementation. This covers the requirements of most of the existing
> >> DRM drivers. A call to drm_simple_encoder_create() allocates and
> >> initializes an encoder instance, a call to drm_simple_encoder_init()
> >> initializes a pre-allocated instance.
> >>
> >> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> > 
> > This has quick a bit midlayer taste to it ... I think having this as a
> > helper would be cleaner ...
> 
> How would such a helper roughly look like?

Essentially same code, but stuff the helper into drm-kms-helper.ko, then
make sure it still works. The separate kernel module makes sure that the
drm core and helper stuff aren't too close friends with each another :-)
Essentially like the simple display pipe helpers.
-Daniel

> 
> Best regards
> Thomas
> 
> > 
> > The other bit is drm_encoder->possible_crtcs. If we do create a helper for
> > these, lets at least try to make them not suck too badly :-) Otherwise I
> > guess it would be time to officially document what exactly possible_crtcs
> > == 0 means from an uabi pov.
> > -Daniel
> > 
> >> ---
> >>  drivers/gpu/drm/drm_encoder.c | 116 ++++++++++++++++++++++++++++++++++
> >>  include/drm/drm_encoder.h     |  10 +++
> >>  2 files changed, 126 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
> >> index ffe691a1bf34..1a65cab1f310 100644
> >> --- a/drivers/gpu/drm/drm_encoder.c
> >> +++ b/drivers/gpu/drm/drm_encoder.c
> >> @@ -178,6 +178,122 @@ int drm_encoder_init(struct drm_device *dev,
> >>  }
> >>  EXPORT_SYMBOL(drm_encoder_init);
> >>  
> >> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_cleanup = {
> >> +	.destroy = drm_encoder_cleanup,
> >> +};
> >> +
> >> +/**
> >> + * drm_simple_encoder_init - Init a preallocated encoder
> >> + * @dev: drm device
> >> + * @funcs: callbacks for this encoder
> >> + * @encoder_type: user visible type of the encoder
> >> + * @name: printf style format string for the encoder name, or NULL
> >> + *        for default name
> >> + *
> >> + * Initialises a preallocated encoder that has no further functionality. The
> >> + * encoder will be released automatically.
> >> + *
> >> + * Returns:
> >> + * Zero on success, error code on failure.
> >> + */
> >> +int drm_simple_encoder_init(struct drm_device *dev,
> >> +			    struct drm_encoder *encoder,
> >> +			    int encoder_type, const char *name, ...)
> >> +{
> >> +	char *namestr = NULL;
> >> +	int ret;
> >> +
> >> +	if (name) {
> >> +		va_list ap;
> >> +
> >> +		va_start(ap, name);
> >> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
> >> +		va_end(ap);
> >> +		if (!namestr)
> >> +			return -ENOMEM;
> >> +	}
> >> +
> >> +	ret = __drm_encoder_init(dev, encoder,
> >> +				 &drm_simple_encoder_funcs_cleanup,
> >> +				 encoder_type, namestr);
> >> +	if (ret)
> >> +		goto err_kfree;
> >> +
> >> +	return 0;
> >> +
> >> +err_kfree:
> >> +	if (name)
> >> +		kfree(namestr);
> >> +	return ret;
> >> +}
> >> +EXPORT_SYMBOL(drm_simple_encoder_init);
> >> +
> >> +static void drm_encoder_destroy(struct drm_encoder *encoder)
> >> +{
> >> +	struct drm_device *dev = encoder->dev;
> >> +
> >> +	drm_encoder_cleanup(encoder);
> >> +	devm_kfree(dev->dev, encoder);
> >> +}
> >> +
> >> +static const struct drm_encoder_funcs drm_simple_encoder_funcs_destroy = {
> >> +	.destroy = drm_encoder_destroy,
> >> +};
> >> +
> >> +/**
> >> + * drm_simple_encoder_create - Allocate and initialize an encoder
> >> + * @dev: drm device
> >> + * @encoder_type: user visible type of the encoder
> >> + * @name: printf style format string for the encoder name, or NULL for
> >> + *        default name
> >> + *
> >> + * Allocates and initialises an encoder that has no further functionality. The
> >> + * encoder will be released automatically.
> >> + *
> >> + * Returns:
> >> + * The encoder on success, a pointer-encoder error code on failure.
> >> + */
> >> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
> >> +					      int encoder_type,
> >> +					      const char *name, ...)
> >> +{
> >> +	char *namestr = NULL;
> >> +	struct drm_encoder *encoder;
> >> +	int ret;
> >> +
> >> +	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
> >> +	if (!encoder)
> >> +		return ERR_PTR(-ENOMEM);
> >> +
> >> +	if (name) {
> >> +		va_list ap;
> >> +
> >> +		va_start(ap, name);
> >> +		namestr = kvasprintf(GFP_KERNEL, name, ap);
> >> +		va_end(ap);
> >> +		if (!namestr) {
> >> +			ret = -ENOMEM;
> >> +			goto err_devm_kfree;
> >> +		}
> >> +	}
> >> +
> >> +	ret = __drm_encoder_init(dev, encoder,
> >> +				 &drm_simple_encoder_funcs_destroy,
> >> +				 encoder_type, namestr);
> >> +	if (ret)
> >> +		goto err_kfree;
> >> +
> >> +	return encoder;
> >> +
> >> +err_kfree:
> >> +	if (name)
> >> +		kfree(namestr);
> >> +err_devm_kfree:
> >> +	devm_kfree(dev->dev, encoder);
> >> +	return ERR_PTR(ret);
> >> +}
> >> +EXPORT_SYMBOL(drm_simple_encoder_create);
> >> +
> >>  /**
> >>   * drm_encoder_cleanup - cleans up an initialised encoder
> >>   * @encoder: encoder to cleanup
> >> diff --git a/include/drm/drm_encoder.h b/include/drm/drm_encoder.h
> >> index 5623994b6e9e..0214f6cf9de6 100644
> >> --- a/include/drm/drm_encoder.h
> >> +++ b/include/drm/drm_encoder.h
> >> @@ -190,6 +190,16 @@ int drm_encoder_init(struct drm_device *dev,
> >>  		     const struct drm_encoder_funcs *funcs,
> >>  		     int encoder_type, const char *name, ...);
> >>  
> >> +__printf(4, 5)
> >> +int drm_simple_encoder_init(struct drm_device *dev,
> >> +			    struct drm_encoder *encoder,
> >> +			    int encoder_type, const char *name, ...);
> >> +
> >> +__printf(3, 4)
> >> +struct drm_encoder *drm_simple_encoder_create(struct drm_device *dev,
> >> +					      int encoder_type,
> >> +					      const char *name, ...);
> >> +
> >>  /**
> >>   * drm_encoder_index - find the index of a registered encoder
> >>   * @encoder: encoder to find index for
> >> -- 
> >> 2.25.0
> >>
> > 
> 
> -- 
> Thomas Zimmermann
> Graphics Driver Developer
> SUSE Software Solutions Germany GmbH
> Maxfeldstr. 5, 90409 Nürnberg, Germany
> (HRB 36809, AG Nürnberg)
> Geschäftsführer: Felix Imendörffer
> 




-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
_______________________________________________
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Re: [PATCH 5/6] drm/qxl: Use simple encoder

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 3282 bytes --]

Hi Thomas,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.6-rc1 next-20200210]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Thomas-Zimmermann/drm-Provide-a-simple-encoder/20200210-153139
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9
config: x86_64-randconfig-f002-20200210 (attached as .config)
compiler: gcc-7 (Debian 7.5.0-3) 7.5.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   drivers/gpu/drm/qxl/qxl_display.c: In function 'qdev_output_init':
>> drivers/gpu/drm/qxl/qxl_display.c:1103:31: error: incompatible type for argument 2 of 'drm_simple_encoder_init'
     drm_simple_encoder_init(dev, qxl_output->enc, DRM_MODE_ENCODER_VIRTUAL,
                                  ^~~~~~~~~~
   In file included from include/drm/drm_modeset_helper_vtables.h:33:0,
                    from include/drm/drm_atomic_helper.h:32,
                    from drivers/gpu/drm/qxl/qxl_display.c:30:
   include/drm/drm_encoder.h:194:5: note: expected 'struct drm_encoder *' but argument is of type 'struct drm_encoder'
    int drm_simple_encoder_init(struct drm_device *dev,
        ^~~~~~~~~~~~~~~~~~~~~~~

vim +/drm_simple_encoder_init +1103 drivers/gpu/drm/qxl/qxl_display.c

  1084	
  1085	static int qdev_output_init(struct drm_device *dev, int num_output)
  1086	{
  1087		struct qxl_device *qdev = dev->dev_private;
  1088		struct qxl_output *qxl_output;
  1089		struct drm_connector *connector;
  1090		struct drm_encoder *encoder;
  1091	
  1092		qxl_output = kzalloc(sizeof(struct qxl_output), GFP_KERNEL);
  1093		if (!qxl_output)
  1094			return -ENOMEM;
  1095	
  1096		qxl_output->index = num_output;
  1097	
  1098		connector = &qxl_output->base;
  1099		encoder = &qxl_output->enc;
  1100		drm_connector_init(dev, &qxl_output->base,
  1101				   &qxl_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
  1102	
> 1103		drm_simple_encoder_init(dev, qxl_output->enc, DRM_MODE_ENCODER_VIRTUAL,
  1104					NULL);
  1105	
  1106		/* we get HPD via client monitors config */
  1107		connector->polled = DRM_CONNECTOR_POLL_HPD;
  1108		encoder->possible_crtcs = 1 << num_output;
  1109		drm_connector_attach_encoder(&qxl_output->base,
  1110						  &qxl_output->enc);
  1111		drm_connector_helper_add(connector, &qxl_connector_helper_funcs);
  1112	
  1113		drm_object_attach_property(&connector->base,
  1114					   qdev->hotplug_mode_update_property, 0);
  1115		drm_object_attach_property(&connector->base,
  1116					   dev->mode_config.suggested_x_property, 0);
  1117		drm_object_attach_property(&connector->base,
  1118					   dev->mode_config.suggested_y_property, 0);
  1119		return 0;
  1120	}
  1121	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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Re: [PATCH 5/6] drm/qxl: Use simple encoder

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 3282 bytes --]

Hi Thomas,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.6-rc1 next-20200210]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Thomas-Zimmermann/drm-Provide-a-simple-encoder/20200210-153139
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9
config: x86_64-randconfig-f002-20200210 (attached as .config)
compiler: gcc-7 (Debian 7.5.0-3) 7.5.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   drivers/gpu/drm/qxl/qxl_display.c: In function 'qdev_output_init':
>> drivers/gpu/drm/qxl/qxl_display.c:1103:31: error: incompatible type for argument 2 of 'drm_simple_encoder_init'
     drm_simple_encoder_init(dev, qxl_output->enc, DRM_MODE_ENCODER_VIRTUAL,
                                  ^~~~~~~~~~
   In file included from include/drm/drm_modeset_helper_vtables.h:33:0,
                    from include/drm/drm_atomic_helper.h:32,
                    from drivers/gpu/drm/qxl/qxl_display.c:30:
   include/drm/drm_encoder.h:194:5: note: expected 'struct drm_encoder *' but argument is of type 'struct drm_encoder'
    int drm_simple_encoder_init(struct drm_device *dev,
        ^~~~~~~~~~~~~~~~~~~~~~~

vim +/drm_simple_encoder_init +1103 drivers/gpu/drm/qxl/qxl_display.c

  1084	
  1085	static int qdev_output_init(struct drm_device *dev, int num_output)
  1086	{
  1087		struct qxl_device *qdev = dev->dev_private;
  1088		struct qxl_output *qxl_output;
  1089		struct drm_connector *connector;
  1090		struct drm_encoder *encoder;
  1091	
  1092		qxl_output = kzalloc(sizeof(struct qxl_output), GFP_KERNEL);
  1093		if (!qxl_output)
  1094			return -ENOMEM;
  1095	
  1096		qxl_output->index = num_output;
  1097	
  1098		connector = &qxl_output->base;
  1099		encoder = &qxl_output->enc;
  1100		drm_connector_init(dev, &qxl_output->base,
  1101				   &qxl_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
  1102	
> 1103		drm_simple_encoder_init(dev, qxl_output->enc, DRM_MODE_ENCODER_VIRTUAL,
  1104					NULL);
  1105	
  1106		/* we get HPD via client monitors config */
  1107		connector->polled = DRM_CONNECTOR_POLL_HPD;
  1108		encoder->possible_crtcs = 1 << num_output;
  1109		drm_connector_attach_encoder(&qxl_output->base,
  1110						  &qxl_output->enc);
  1111		drm_connector_helper_add(connector, &qxl_connector_helper_funcs);
  1112	
  1113		drm_object_attach_property(&connector->base,
  1114					   qdev->hotplug_mode_update_property, 0);
  1115		drm_object_attach_property(&connector->base,
  1116					   dev->mode_config.suggested_x_property, 0);
  1117		drm_object_attach_property(&connector->base,
  1118					   dev->mode_config.suggested_y_property, 0);
  1119		return 0;
  1120	}
  1121	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
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https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH 5/6] drm/qxl: Use simple encoder

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 3362 bytes --]

Hi Thomas,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.6-rc1 next-20200210]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Thomas-Zimmermann/drm-Provide-a-simple-encoder/20200210-153139
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9
config: x86_64-randconfig-f002-20200210 (attached as .config)
compiler: gcc-7 (Debian 7.5.0-3) 7.5.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   drivers/gpu/drm/qxl/qxl_display.c: In function 'qdev_output_init':
>> drivers/gpu/drm/qxl/qxl_display.c:1103:31: error: incompatible type for argument 2 of 'drm_simple_encoder_init'
     drm_simple_encoder_init(dev, qxl_output->enc, DRM_MODE_ENCODER_VIRTUAL,
                                  ^~~~~~~~~~
   In file included from include/drm/drm_modeset_helper_vtables.h:33:0,
                    from include/drm/drm_atomic_helper.h:32,
                    from drivers/gpu/drm/qxl/qxl_display.c:30:
   include/drm/drm_encoder.h:194:5: note: expected 'struct drm_encoder *' but argument is of type 'struct drm_encoder'
    int drm_simple_encoder_init(struct drm_device *dev,
        ^~~~~~~~~~~~~~~~~~~~~~~

vim +/drm_simple_encoder_init +1103 drivers/gpu/drm/qxl/qxl_display.c

  1084	
  1085	static int qdev_output_init(struct drm_device *dev, int num_output)
  1086	{
  1087		struct qxl_device *qdev = dev->dev_private;
  1088		struct qxl_output *qxl_output;
  1089		struct drm_connector *connector;
  1090		struct drm_encoder *encoder;
  1091	
  1092		qxl_output = kzalloc(sizeof(struct qxl_output), GFP_KERNEL);
  1093		if (!qxl_output)
  1094			return -ENOMEM;
  1095	
  1096		qxl_output->index = num_output;
  1097	
  1098		connector = &qxl_output->base;
  1099		encoder = &qxl_output->enc;
  1100		drm_connector_init(dev, &qxl_output->base,
  1101				   &qxl_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
  1102	
> 1103		drm_simple_encoder_init(dev, qxl_output->enc, DRM_MODE_ENCODER_VIRTUAL,
  1104					NULL);
  1105	
  1106		/* we get HPD via client monitors config */
  1107		connector->polled = DRM_CONNECTOR_POLL_HPD;
  1108		encoder->possible_crtcs = 1 << num_output;
  1109		drm_connector_attach_encoder(&qxl_output->base,
  1110						  &qxl_output->enc);
  1111		drm_connector_helper_add(connector, &qxl_connector_helper_funcs);
  1112	
  1113		drm_object_attach_property(&connector->base,
  1114					   qdev->hotplug_mode_update_property, 0);
  1115		drm_object_attach_property(&connector->base,
  1116					   dev->mode_config.suggested_x_property, 0);
  1117		drm_object_attach_property(&connector->base,
  1118					   dev->mode_config.suggested_y_property, 0);
  1119		return 0;
  1120	}
  1121	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[kbuild test robot]

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Hi Thomas,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.6-rc1 next-20200210]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Thomas-Zimmermann/drm-Provide-a-simple-encoder/20200210-153139
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9
reproduce: make htmldocs

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'getprocattr' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'setprocattr' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'locked_down' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_open' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_alloc' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_free' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_read' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_write' not described in 'security_list_options'
   drivers/usb/typec/bus.c:1: warning: 'typec_altmode_register_driver' not found
   drivers/usb/typec/bus.c:1: warning: 'typec_altmode_unregister_driver' not found
   drivers/usb/typec/class.c:1: warning: 'typec_altmode_unregister_notifier' not found
   drivers/usb/typec/class.c:1: warning: 'typec_altmode_register_notifier' not found
   include/linux/regulator/machine.h:196: warning: Function parameter or member 'max_uV_step' not described in 'regulation_constraints'
   include/linux/regulator/driver.h:223: warning: Function parameter or member 'resume' not described in 'regulator_ops'
   include/linux/skbuff.h:890: warning: Function parameter or member 'dev_scratch' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'list' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'ip_defrag_offset' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'skb_mstamp_ns' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member '__cloned_offset' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'head_frag' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member '__pkt_type_offset' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'encapsulation' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'encap_hdr_csum' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'csum_valid' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member '__pkt_vlan_present_offset' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'vlan_present' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'csum_complete_sw' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'csum_level' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'inner_protocol_type' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'remcsum_offload' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'sender_cpu' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'reserved_tailroom' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'inner_ipproto' not described in 'sk_buff'
   include/net/sock.h:232: warning: Function parameter or member 'skc_addrpair' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_portpair' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_ipv6only' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_net_refcnt' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_v6_daddr' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_v6_rcv_saddr' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_cookie' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_listener' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_tw_dr' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_rcv_wnd' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_tw_rcv_nxt' not described in 'sock_common'
   include/net/sock.h:498: warning: Function parameter or member 'sk_rx_skb_cache' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_wq_raw' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'tcp_rtx_queue' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_tx_skb_cache' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_route_forced_caps' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_txtime_report_errors' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_validate_xmit_skb' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_bpf_storage' not described in 'sock'
   include/net/sock.h:2444: warning: Function parameter or member 'tcp_rx_skb_cache_key' not described in 'DECLARE_STATIC_KEY_FALSE'
   include/net/sock.h:2444: warning: Excess function parameter 'sk' description in 'DECLARE_STATIC_KEY_FALSE'
   include/net/sock.h:2444: warning: Excess function parameter 'skb' description in 'DECLARE_STATIC_KEY_FALSE'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'gso_partial_features' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'l3mdev_ops' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xfrmdev_ops' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'tlsdev_ops' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'name_assign_type' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'ieee802154_ptr' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'mpls_ptr' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xdp_prog' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'gro_flush_timeout' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xdp_bulkq' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xps_cpus_map' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xps_rxqs_map' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'qdisc_hash' not described in 'net_device'
   include/linux/phylink.h:56: warning: Function parameter or member '__ETHTOOL_DECLARE_LINK_MODE_MASK(advertising' not described in 'phylink_link_state'
   include/linux/phylink.h:56: warning: Function parameter or member '__ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising' not described in 'phylink_link_state'
   drivers/infiniband/core/umem_odp.c:161: warning: Function parameter or member 'ops' not described in 'ib_umem_odp_alloc_child'
   drivers/infiniband/core/umem_odp.c:211: warning: Function parameter or member 'ops' not described in 'ib_umem_odp_get'
   drivers/infiniband/ulp/iser/iscsi_iser.h:401: warning: Function parameter or member 'all_list' not described in 'iser_fr_desc'
   drivers/infiniband/ulp/iser/iscsi_iser.h:415: warning: Function parameter or member 'all_list' not described in 'iser_fr_pool'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd0' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd1' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd2' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd3' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd4' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:205: warning: Function parameter or member 'rsvd0' not described in 'opa_per_veswport_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:205: warning: Function parameter or member 'rsvd1' not described in 'opa_per_veswport_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:205: warning: Function parameter or member 'rsvd2' not described in 'opa_per_veswport_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:205: warning: Function parameter or member 'rsvd3' not described in 'opa_per_veswport_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:263: warning: Function parameter or member 'tbl_entries' not described in 'opa_veswport_mactable'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:342: warning: Function parameter or member 'reserved' not described in 'opa_veswport_summary_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd0' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd1' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd2' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd3' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd4' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd5' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd6' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd7' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd8' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd9' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:460: warning: Function parameter or member 'reserved' not described in 'opa_vnic_vema_mad'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:485: warning: Function parameter or member 'reserved' not described in 'opa_vnic_notice_attr'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:500: warning: Function parameter or member 'reserved' not described in 'opa_vnic_vema_mad_trap'
   include/linux/input/sparse-keymap.h:43: warning: Function parameter or member 'sw' not described in 'key_entry'
   drivers/gpu/drm/drm_encoder.c:202: warning: Excess function parameter 'funcs' description in 'drm_simple_encoder_init'
>> drivers/gpu/drm/drm_encoder.c:203: warning: Function parameter or member 'encoder' not described in 'drm_simple_encoder_init'
   drivers/gpu/drm/drm_encoder.c:203: warning: Excess function parameter 'funcs' description in 'drm_simple_encoder_init'
   include/drm/drm_modeset_helper_vtables.h:1052: warning: Function parameter or member 'prepare_writeback_job' not described in 'drm_connector_helper_funcs'
   include/drm/drm_modeset_helper_vtables.h:1052: warning: Function parameter or member 'cleanup_writeback_job' not described in 'drm_connector_helper_funcs'
   drivers/gpu/drm/bridge/panel.c:303: warning: Function parameter or member 'bridge' not described in 'drm_panel_bridge_connector'
   include/drm/drm_dp_mst_helper.h:162: warning: Function parameter or member 'fec_capable' not described in 'drm_dp_mst_port'
   include/drm/gpu_scheduler.h:103: warning: Function parameter or member 'priority' not described in 'drm_sched_entity'
   drivers/gpu/drm/i915/i915_vma.h:1: warning: 'Virtual Memory Address' not found
   drivers/gpu/drm/i915/i915_gem_gtt.c:1: warning: 'Global GTT views' not found
   include/linux/host1x.h:66: warning: Function parameter or member 'parent' not described in 'host1x_client'
   include/linux/host1x.h:66: warning: Function parameter or member 'usecount' not described in 'host1x_client'
   include/linux/host1x.h:66: warning: Function parameter or member 'lock' not described in 'host1x_client'
   include/net/cfg80211.h:1189: warning: Function parameter or member 'txpwr' not described in 'station_parameters'
   include/net/mac80211.h:4081: warning: Function parameter or member 'sta_set_txpwr' not described in 'ieee80211_ops'
   include/net/mac80211.h:2036: warning: Function parameter or member 'txpwr' not described in 'ieee80211_sta'
   kernel/sched/fair.c:3526: warning: Excess function parameter 'flags' description in 'attach_entity_load_avg'
   Documentation/admin-guide/acpi/fan_performance_states.rst:21: WARNING: Literal block ends without a blank line; unexpected unindent.
   Documentation/admin-guide/acpi/fan_performance_states.rst:41: WARNING: Literal block expected; none found.
   Documentation/admin-guide/perf/imx-ddr.rst:47: WARNING: Unexpected indentation.
   Documentation/x86/index.rst:7: WARNING: toctree contains reference to nonexisting document 'x86/intel_mpx'
   Documentation/admin-guide/bootconfig.rst:26: WARNING: Literal block expected; none found.
   Documentation/admin-guide/hw-vuln/tsx_async_abort.rst:142: WARNING: duplicate label virt_mechanism, other instance in Documentation/admin-guide/hw-vuln/mds.rst
   drivers/message/fusion/mptbase.c:5057: WARNING: Definition list ends without a blank line; unexpected unindent.
   include/uapi/linux/firewire-cdev.h:312: WARNING: Inline literal start-string without end-string.
   drivers/firewire/core-transaction.c:606: WARNING: Inline strong start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:425: WARNING: Unexpected indentation.
   Documentation/driver-api/gpio/driver.rst:423: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:427: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/gpio/driver.rst:429: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:429: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:429: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:433: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:446: WARNING: Unexpected indentation.
   Documentation/driver-api/gpio/driver.rst:440: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:440: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:447: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/gpio/driver.rst:449: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/driver-api/gpio/driver.rst:462: WARNING: Unexpected indentation.
   Documentation/driver-api/gpio/driver.rst:460: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:462: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:465: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/gpio/driver.rst:467: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:467: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:467: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:471: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:478: WARNING: Inline emphasis start-string without end-string.
   include/linux/spi/spi.h:399: WARNING: Unexpected indentation.
   Documentation/power/index.rst:7: WARNING: toctree contains reference to nonexisting document 'power/interface'
   Documentation/power/pm_qos_interface.rst:12: WARNING: Unexpected indentation.
   Documentation/admin-guide/ras.rst:358: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/admin-guide/ras.rst:358: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/admin-guide/ras.rst:363: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/admin-guide/ras.rst:363: WARNING: Definition list ends without a blank line; unexpected unindent.
   include/linux/devfreq.h:156: WARNING: Inline emphasis start-string without end-string.
   include/linux/devfreq.h:261: WARNING: Inline emphasis start-string without end-string.
   include/linux/devfreq.h:281: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/dmaengine/client.rst:203: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/client.rst:204: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/client.rst:210: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/client.rst:211: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/client.rst:220: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/client.rst:221: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/client.rst:229: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/client.rst:230: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/provider.rst:270: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/provider.rst:273: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/provider.rst:288: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/provider.rst:290: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/driver-model/driver.rst:215: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/driver-model/driver.rst:215: WARNING: Inline emphasis start-string without end-string.
   Documentation/filesystems/fuse.rst:2: WARNING: Explicit markup ends without a blank line; unexpected unindent.
   Documentation/filesystems/ubifs-authentication.rst:94: WARNING: Inline interpreted text or phrase reference start-string without end-string.
   Documentation/trace/events.rst:589: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:620: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:623: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:626: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:703: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:697: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:722: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:775: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:814: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:817: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:820: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:823: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:826: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:829: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:832: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:844: WARNING: Unexpected indentation.
   Documentation/trace/events.rst:845: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:849: WARNING: Unexpected indentation.
   Documentation/trace/events.rst:850: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:883: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:886: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:889: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:895: WARNING: Bullet list ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:895: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:968: WARNING: Inline emphasis start-string without end-string.
   fs/inode.c:1608: WARNING: Inline emphasis start-string without end-string.
   fs/inode.c:1608: WARNING: Inline emphasis start-string without end-string.
   fs/inode.c:1614: WARNING: Inline emphasis start-string without end-string.
   fs/seq_file.c:40: WARNING: Inline strong start-string without end-string.

vim +203 drivers/gpu/drm/drm_encoder.c

   184	
   185	/**
   186	 * drm_simple_encoder_init - Init a preallocated encoder
   187	 * @dev: drm device
   188	 * @funcs: callbacks for this encoder
   189	 * @encoder_type: user visible type of the encoder
   190	 * @name: printf style format string for the encoder name, or NULL
   191	 *        for default name
   192	 *
   193	 * Initialises a preallocated encoder that has no further functionality. The
   194	 * encoder will be released automatically.
   195	 *
   196	 * Returns:
   197	 * Zero on success, error code on failure.
   198	 */
   199	int drm_simple_encoder_init(struct drm_device *dev,
   200				    struct drm_encoder *encoder,
   201				    int encoder_type, const char *name, ...)
   202	{
 > 203		char *namestr = NULL;
   204		int ret;
   205	
   206		if (name) {
   207			va_list ap;
   208	
   209			va_start(ap, name);
   210			namestr = kvasprintf(GFP_KERNEL, name, ap);
   211			va_end(ap);
   212			if (!namestr)
   213				return -ENOMEM;
   214		}
   215	
   216		ret = __drm_encoder_init(dev, encoder,
   217					 &drm_simple_encoder_funcs_cleanup,
   218					 encoder_type, namestr);
   219		if (ret)
   220			goto err_kfree;
   221	
   222		return 0;
   223	
   224	err_kfree:
   225		if (name)
   226			kfree(namestr);
   227		return ret;
   228	}
   229	EXPORT_SYMBOL(drm_simple_encoder_init);
   230	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization

Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init,create}()

[kbuild test robot]

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Hi Thomas,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.6-rc1 next-20200210]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Thomas-Zimmermann/drm-Provide-a-simple-encoder/20200210-153139
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9
reproduce: make htmldocs

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'getprocattr' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'setprocattr' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'locked_down' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_open' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_alloc' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_free' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_read' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_write' not described in 'security_list_options'
   drivers/usb/typec/bus.c:1: warning: 'typec_altmode_register_driver' not found
   drivers/usb/typec/bus.c:1: warning: 'typec_altmode_unregister_driver' not found
   drivers/usb/typec/class.c:1: warning: 'typec_altmode_unregister_notifier' not found
   drivers/usb/typec/class.c:1: warning: 'typec_altmode_register_notifier' not found
   include/linux/regulator/machine.h:196: warning: Function parameter or member 'max_uV_step' not described in 'regulation_constraints'
   include/linux/regulator/driver.h:223: warning: Function parameter or member 'resume' not described in 'regulator_ops'
   include/linux/skbuff.h:890: warning: Function parameter or member 'dev_scratch' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'list' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'ip_defrag_offset' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'skb_mstamp_ns' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member '__cloned_offset' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'head_frag' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member '__pkt_type_offset' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'encapsulation' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'encap_hdr_csum' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'csum_valid' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member '__pkt_vlan_present_offset' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'vlan_present' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'csum_complete_sw' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'csum_level' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'inner_protocol_type' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'remcsum_offload' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'sender_cpu' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'reserved_tailroom' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'inner_ipproto' not described in 'sk_buff'
   include/net/sock.h:232: warning: Function parameter or member 'skc_addrpair' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_portpair' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_ipv6only' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_net_refcnt' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_v6_daddr' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_v6_rcv_saddr' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_cookie' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_listener' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_tw_dr' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_rcv_wnd' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_tw_rcv_nxt' not described in 'sock_common'
   include/net/sock.h:498: warning: Function parameter or member 'sk_rx_skb_cache' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_wq_raw' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'tcp_rtx_queue' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_tx_skb_cache' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_route_forced_caps' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_txtime_report_errors' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_validate_xmit_skb' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_bpf_storage' not described in 'sock'
   include/net/sock.h:2444: warning: Function parameter or member 'tcp_rx_skb_cache_key' not described in 'DECLARE_STATIC_KEY_FALSE'
   include/net/sock.h:2444: warning: Excess function parameter 'sk' description in 'DECLARE_STATIC_KEY_FALSE'
   include/net/sock.h:2444: warning: Excess function parameter 'skb' description in 'DECLARE_STATIC_KEY_FALSE'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'gso_partial_features' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'l3mdev_ops' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xfrmdev_ops' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'tlsdev_ops' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'name_assign_type' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'ieee802154_ptr' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'mpls_ptr' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xdp_prog' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'gro_flush_timeout' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xdp_bulkq' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xps_cpus_map' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xps_rxqs_map' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'qdisc_hash' not described in 'net_device'
   include/linux/phylink.h:56: warning: Function parameter or member '__ETHTOOL_DECLARE_LINK_MODE_MASK(advertising' not described in 'phylink_link_state'
   include/linux/phylink.h:56: warning: Function parameter or member '__ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising' not described in 'phylink_link_state'
   drivers/infiniband/core/umem_odp.c:161: warning: Function parameter or member 'ops' not described in 'ib_umem_odp_alloc_child'
   drivers/infiniband/core/umem_odp.c:211: warning: Function parameter or member 'ops' not described in 'ib_umem_odp_get'
   drivers/infiniband/ulp/iser/iscsi_iser.h:401: warning: Function parameter or member 'all_list' not described in 'iser_fr_desc'
   drivers/infiniband/ulp/iser/iscsi_iser.h:415: warning: Function parameter or member 'all_list' not described in 'iser_fr_pool'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd0' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd1' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd2' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd3' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd4' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:205: warning: Function parameter or member 'rsvd0' not described in 'opa_per_veswport_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:205: warning: Function parameter or member 'rsvd1' not described in 'opa_per_veswport_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:205: warning: Function parameter or member 'rsvd2' not described in 'opa_per_veswport_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:205: warning: Function parameter or member 'rsvd3' not described in 'opa_per_veswport_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:263: warning: Function parameter or member 'tbl_entries' not described in 'opa_veswport_mactable'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:342: warning: Function parameter or member 'reserved' not described in 'opa_veswport_summary_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd0' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd1' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd2' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd3' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd4' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd5' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd6' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd7' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd8' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd9' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:460: warning: Function parameter or member 'reserved' not described in 'opa_vnic_vema_mad'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:485: warning: Function parameter or member 'reserved' not described in 'opa_vnic_notice_attr'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:500: warning: Function parameter or member 'reserved' not described in 'opa_vnic_vema_mad_trap'
   include/linux/input/sparse-keymap.h:43: warning: Function parameter or member 'sw' not described in 'key_entry'
   drivers/gpu/drm/drm_encoder.c:202: warning: Excess function parameter 'funcs' description in 'drm_simple_encoder_init'
>> drivers/gpu/drm/drm_encoder.c:203: warning: Function parameter or member 'encoder' not described in 'drm_simple_encoder_init'
   drivers/gpu/drm/drm_encoder.c:203: warning: Excess function parameter 'funcs' description in 'drm_simple_encoder_init'
   include/drm/drm_modeset_helper_vtables.h:1052: warning: Function parameter or member 'prepare_writeback_job' not described in 'drm_connector_helper_funcs'
   include/drm/drm_modeset_helper_vtables.h:1052: warning: Function parameter or member 'cleanup_writeback_job' not described in 'drm_connector_helper_funcs'
   drivers/gpu/drm/bridge/panel.c:303: warning: Function parameter or member 'bridge' not described in 'drm_panel_bridge_connector'
   include/drm/drm_dp_mst_helper.h:162: warning: Function parameter or member 'fec_capable' not described in 'drm_dp_mst_port'
   include/drm/gpu_scheduler.h:103: warning: Function parameter or member 'priority' not described in 'drm_sched_entity'
   drivers/gpu/drm/i915/i915_vma.h:1: warning: 'Virtual Memory Address' not found
   drivers/gpu/drm/i915/i915_gem_gtt.c:1: warning: 'Global GTT views' not found
   include/linux/host1x.h:66: warning: Function parameter or member 'parent' not described in 'host1x_client'
   include/linux/host1x.h:66: warning: Function parameter or member 'usecount' not described in 'host1x_client'
   include/linux/host1x.h:66: warning: Function parameter or member 'lock' not described in 'host1x_client'
   include/net/cfg80211.h:1189: warning: Function parameter or member 'txpwr' not described in 'station_parameters'
   include/net/mac80211.h:4081: warning: Function parameter or member 'sta_set_txpwr' not described in 'ieee80211_ops'
   include/net/mac80211.h:2036: warning: Function parameter or member 'txpwr' not described in 'ieee80211_sta'
   kernel/sched/fair.c:3526: warning: Excess function parameter 'flags' description in 'attach_entity_load_avg'
   Documentation/admin-guide/acpi/fan_performance_states.rst:21: WARNING: Literal block ends without a blank line; unexpected unindent.
   Documentation/admin-guide/acpi/fan_performance_states.rst:41: WARNING: Literal block expected; none found.
   Documentation/admin-guide/perf/imx-ddr.rst:47: WARNING: Unexpected indentation.
   Documentation/x86/index.rst:7: WARNING: toctree contains reference to nonexisting document 'x86/intel_mpx'
   Documentation/admin-guide/bootconfig.rst:26: WARNING: Literal block expected; none found.
   Documentation/admin-guide/hw-vuln/tsx_async_abort.rst:142: WARNING: duplicate label virt_mechanism, other instance in Documentation/admin-guide/hw-vuln/mds.rst
   drivers/message/fusion/mptbase.c:5057: WARNING: Definition list ends without a blank line; unexpected unindent.
   include/uapi/linux/firewire-cdev.h:312: WARNING: Inline literal start-string without end-string.
   drivers/firewire/core-transaction.c:606: WARNING: Inline strong start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:425: WARNING: Unexpected indentation.
   Documentation/driver-api/gpio/driver.rst:423: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:427: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/gpio/driver.rst:429: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:429: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:429: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:433: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:446: WARNING: Unexpected indentation.
   Documentation/driver-api/gpio/driver.rst:440: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:440: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:447: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/gpio/driver.rst:449: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/driver-api/gpio/driver.rst:462: WARNING: Unexpected indentation.
   Documentation/driver-api/gpio/driver.rst:460: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:462: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:465: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/gpio/driver.rst:467: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:467: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:467: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:471: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:478: WARNING: Inline emphasis start-string without end-string.
   include/linux/spi/spi.h:399: WARNING: Unexpected indentation.
   Documentation/power/index.rst:7: WARNING: toctree contains reference to nonexisting document 'power/interface'
   Documentation/power/pm_qos_interface.rst:12: WARNING: Unexpected indentation.
   Documentation/admin-guide/ras.rst:358: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/admin-guide/ras.rst:358: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/admin-guide/ras.rst:363: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/admin-guide/ras.rst:363: WARNING: Definition list ends without a blank line; unexpected unindent.
   include/linux/devfreq.h:156: WARNING: Inline emphasis start-string without end-string.
   include/linux/devfreq.h:261: WARNING: Inline emphasis start-string without end-string.
   include/linux/devfreq.h:281: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/dmaengine/client.rst:203: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/client.rst:204: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/client.rst:210: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/client.rst:211: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/client.rst:220: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/client.rst:221: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/client.rst:229: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/client.rst:230: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/provider.rst:270: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/provider.rst:273: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/provider.rst:288: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/provider.rst:290: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/driver-model/driver.rst:215: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/driver-model/driver.rst:215: WARNING: Inline emphasis start-string without end-string.
   Documentation/filesystems/fuse.rst:2: WARNING: Explicit markup ends without a blank line; unexpected unindent.
   Documentation/filesystems/ubifs-authentication.rst:94: WARNING: Inline interpreted text or phrase reference start-string without end-string.
   Documentation/trace/events.rst:589: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:620: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:623: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:626: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:703: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:697: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:722: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:775: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:814: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:817: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:820: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:823: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:826: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:829: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:832: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:844: WARNING: Unexpected indentation.
   Documentation/trace/events.rst:845: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:849: WARNING: Unexpected indentation.
   Documentation/trace/events.rst:850: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:883: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:886: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:889: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:895: WARNING: Bullet list ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:895: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:968: WARNING: Inline emphasis start-string without end-string.
   fs/inode.c:1608: WARNING: Inline emphasis start-string without end-string.
   fs/inode.c:1608: WARNING: Inline emphasis start-string without end-string.
   fs/inode.c:1614: WARNING: Inline emphasis start-string without end-string.
   fs/seq_file.c:40: WARNING: Inline strong start-string without end-string.

vim +203 drivers/gpu/drm/drm_encoder.c

   184	
   185	/**
   186	 * drm_simple_encoder_init - Init a preallocated encoder
   187	 * @dev: drm device
   188	 * @funcs: callbacks for this encoder
   189	 * @encoder_type: user visible type of the encoder
   190	 * @name: printf style format string for the encoder name, or NULL
   191	 *        for default name
   192	 *
   193	 * Initialises a preallocated encoder that has no further functionality. The
   194	 * encoder will be released automatically.
   195	 *
   196	 * Returns:
   197	 * Zero on success, error code on failure.
   198	 */
   199	int drm_simple_encoder_init(struct drm_device *dev,
   200				    struct drm_encoder *encoder,
   201				    int encoder_type, const char *name, ...)
   202	{
 > 203		char *namestr = NULL;
   204		int ret;
   205	
   206		if (name) {
   207			va_list ap;
   208	
   209			va_start(ap, name);
   210			namestr = kvasprintf(GFP_KERNEL, name, ap);
   211			va_end(ap);
   212			if (!namestr)
   213				return -ENOMEM;
   214		}
   215	
   216		ret = __drm_encoder_init(dev, encoder,
   217					 &drm_simple_encoder_funcs_cleanup,
   218					 encoder_type, namestr);
   219		if (ret)
   220			goto err_kfree;
   221	
   222		return 0;
   223	
   224	err_kfree:
   225		if (name)
   226			kfree(namestr);
   227		return ret;
   228	}
   229	EXPORT_SYMBOL(drm_simple_encoder_init);
   230	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH 2/6] drm: Add drm_simple_encoder_{init, create}()

[kbuild test robot]

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Hi Thomas,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.6-rc1 next-20200210]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Thomas-Zimmermann/drm-Provide-a-simple-encoder/20200210-153139
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9
reproduce: make htmldocs

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'getprocattr' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'setprocattr' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'locked_down' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_open' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_alloc' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_free' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_read' not described in 'security_list_options'
   include/linux/lsm_hooks.h:1830: warning: Function parameter or member 'perf_event_write' not described in 'security_list_options'
   drivers/usb/typec/bus.c:1: warning: 'typec_altmode_register_driver' not found
   drivers/usb/typec/bus.c:1: warning: 'typec_altmode_unregister_driver' not found
   drivers/usb/typec/class.c:1: warning: 'typec_altmode_unregister_notifier' not found
   drivers/usb/typec/class.c:1: warning: 'typec_altmode_register_notifier' not found
   include/linux/regulator/machine.h:196: warning: Function parameter or member 'max_uV_step' not described in 'regulation_constraints'
   include/linux/regulator/driver.h:223: warning: Function parameter or member 'resume' not described in 'regulator_ops'
   include/linux/skbuff.h:890: warning: Function parameter or member 'dev_scratch' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'list' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'ip_defrag_offset' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'skb_mstamp_ns' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member '__cloned_offset' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'head_frag' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member '__pkt_type_offset' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'encapsulation' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'encap_hdr_csum' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'csum_valid' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member '__pkt_vlan_present_offset' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'vlan_present' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'csum_complete_sw' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'csum_level' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'inner_protocol_type' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'remcsum_offload' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'sender_cpu' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'reserved_tailroom' not described in 'sk_buff'
   include/linux/skbuff.h:890: warning: Function parameter or member 'inner_ipproto' not described in 'sk_buff'
   include/net/sock.h:232: warning: Function parameter or member 'skc_addrpair' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_portpair' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_ipv6only' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_net_refcnt' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_v6_daddr' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_v6_rcv_saddr' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_cookie' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_listener' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_tw_dr' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_rcv_wnd' not described in 'sock_common'
   include/net/sock.h:232: warning: Function parameter or member 'skc_tw_rcv_nxt' not described in 'sock_common'
   include/net/sock.h:498: warning: Function parameter or member 'sk_rx_skb_cache' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_wq_raw' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'tcp_rtx_queue' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_tx_skb_cache' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_route_forced_caps' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_txtime_report_errors' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_validate_xmit_skb' not described in 'sock'
   include/net/sock.h:498: warning: Function parameter or member 'sk_bpf_storage' not described in 'sock'
   include/net/sock.h:2444: warning: Function parameter or member 'tcp_rx_skb_cache_key' not described in 'DECLARE_STATIC_KEY_FALSE'
   include/net/sock.h:2444: warning: Excess function parameter 'sk' description in 'DECLARE_STATIC_KEY_FALSE'
   include/net/sock.h:2444: warning: Excess function parameter 'skb' description in 'DECLARE_STATIC_KEY_FALSE'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'gso_partial_features' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'l3mdev_ops' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xfrmdev_ops' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'tlsdev_ops' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'name_assign_type' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'ieee802154_ptr' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'mpls_ptr' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xdp_prog' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'gro_flush_timeout' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xdp_bulkq' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xps_cpus_map' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'xps_rxqs_map' not described in 'net_device'
   include/linux/netdevice.h:2100: warning: Function parameter or member 'qdisc_hash' not described in 'net_device'
   include/linux/phylink.h:56: warning: Function parameter or member '__ETHTOOL_DECLARE_LINK_MODE_MASK(advertising' not described in 'phylink_link_state'
   include/linux/phylink.h:56: warning: Function parameter or member '__ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising' not described in 'phylink_link_state'
   drivers/infiniband/core/umem_odp.c:161: warning: Function parameter or member 'ops' not described in 'ib_umem_odp_alloc_child'
   drivers/infiniband/core/umem_odp.c:211: warning: Function parameter or member 'ops' not described in 'ib_umem_odp_get'
   drivers/infiniband/ulp/iser/iscsi_iser.h:401: warning: Function parameter or member 'all_list' not described in 'iser_fr_desc'
   drivers/infiniband/ulp/iser/iscsi_iser.h:415: warning: Function parameter or member 'all_list' not described in 'iser_fr_pool'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd0' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd1' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd2' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd3' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:148: warning: Function parameter or member 'rsvd4' not described in 'opa_vesw_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:205: warning: Function parameter or member 'rsvd0' not described in 'opa_per_veswport_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:205: warning: Function parameter or member 'rsvd1' not described in 'opa_per_veswport_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:205: warning: Function parameter or member 'rsvd2' not described in 'opa_per_veswport_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:205: warning: Function parameter or member 'rsvd3' not described in 'opa_per_veswport_info'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:263: warning: Function parameter or member 'tbl_entries' not described in 'opa_veswport_mactable'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:342: warning: Function parameter or member 'reserved' not described in 'opa_veswport_summary_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd0' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd1' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd2' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd3' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd4' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd5' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd6' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd7' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd8' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:394: warning: Function parameter or member 'rsvd9' not described in 'opa_veswport_error_counters'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:460: warning: Function parameter or member 'reserved' not described in 'opa_vnic_vema_mad'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:485: warning: Function parameter or member 'reserved' not described in 'opa_vnic_notice_attr'
   drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h:500: warning: Function parameter or member 'reserved' not described in 'opa_vnic_vema_mad_trap'
   include/linux/input/sparse-keymap.h:43: warning: Function parameter or member 'sw' not described in 'key_entry'
   drivers/gpu/drm/drm_encoder.c:202: warning: Excess function parameter 'funcs' description in 'drm_simple_encoder_init'
>> drivers/gpu/drm/drm_encoder.c:203: warning: Function parameter or member 'encoder' not described in 'drm_simple_encoder_init'
   drivers/gpu/drm/drm_encoder.c:203: warning: Excess function parameter 'funcs' description in 'drm_simple_encoder_init'
   include/drm/drm_modeset_helper_vtables.h:1052: warning: Function parameter or member 'prepare_writeback_job' not described in 'drm_connector_helper_funcs'
   include/drm/drm_modeset_helper_vtables.h:1052: warning: Function parameter or member 'cleanup_writeback_job' not described in 'drm_connector_helper_funcs'
   drivers/gpu/drm/bridge/panel.c:303: warning: Function parameter or member 'bridge' not described in 'drm_panel_bridge_connector'
   include/drm/drm_dp_mst_helper.h:162: warning: Function parameter or member 'fec_capable' not described in 'drm_dp_mst_port'
   include/drm/gpu_scheduler.h:103: warning: Function parameter or member 'priority' not described in 'drm_sched_entity'
   drivers/gpu/drm/i915/i915_vma.h:1: warning: 'Virtual Memory Address' not found
   drivers/gpu/drm/i915/i915_gem_gtt.c:1: warning: 'Global GTT views' not found
   include/linux/host1x.h:66: warning: Function parameter or member 'parent' not described in 'host1x_client'
   include/linux/host1x.h:66: warning: Function parameter or member 'usecount' not described in 'host1x_client'
   include/linux/host1x.h:66: warning: Function parameter or member 'lock' not described in 'host1x_client'
   include/net/cfg80211.h:1189: warning: Function parameter or member 'txpwr' not described in 'station_parameters'
   include/net/mac80211.h:4081: warning: Function parameter or member 'sta_set_txpwr' not described in 'ieee80211_ops'
   include/net/mac80211.h:2036: warning: Function parameter or member 'txpwr' not described in 'ieee80211_sta'
   kernel/sched/fair.c:3526: warning: Excess function parameter 'flags' description in 'attach_entity_load_avg'
   Documentation/admin-guide/acpi/fan_performance_states.rst:21: WARNING: Literal block ends without a blank line; unexpected unindent.
   Documentation/admin-guide/acpi/fan_performance_states.rst:41: WARNING: Literal block expected; none found.
   Documentation/admin-guide/perf/imx-ddr.rst:47: WARNING: Unexpected indentation.
   Documentation/x86/index.rst:7: WARNING: toctree contains reference to nonexisting document 'x86/intel_mpx'
   Documentation/admin-guide/bootconfig.rst:26: WARNING: Literal block expected; none found.
   Documentation/admin-guide/hw-vuln/tsx_async_abort.rst:142: WARNING: duplicate label virt_mechanism, other instance in Documentation/admin-guide/hw-vuln/mds.rst
   drivers/message/fusion/mptbase.c:5057: WARNING: Definition list ends without a blank line; unexpected unindent.
   include/uapi/linux/firewire-cdev.h:312: WARNING: Inline literal start-string without end-string.
   drivers/firewire/core-transaction.c:606: WARNING: Inline strong start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:425: WARNING: Unexpected indentation.
   Documentation/driver-api/gpio/driver.rst:423: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:427: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/gpio/driver.rst:429: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:429: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:429: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:433: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:446: WARNING: Unexpected indentation.
   Documentation/driver-api/gpio/driver.rst:440: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:440: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:447: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/gpio/driver.rst:449: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/driver-api/gpio/driver.rst:462: WARNING: Unexpected indentation.
   Documentation/driver-api/gpio/driver.rst:460: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:462: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:465: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/gpio/driver.rst:467: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:467: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:467: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:471: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/gpio/driver.rst:478: WARNING: Inline emphasis start-string without end-string.
   include/linux/spi/spi.h:399: WARNING: Unexpected indentation.
   Documentation/power/index.rst:7: WARNING: toctree contains reference to nonexisting document 'power/interface'
   Documentation/power/pm_qos_interface.rst:12: WARNING: Unexpected indentation.
   Documentation/admin-guide/ras.rst:358: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/admin-guide/ras.rst:358: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/admin-guide/ras.rst:363: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/admin-guide/ras.rst:363: WARNING: Definition list ends without a blank line; unexpected unindent.
   include/linux/devfreq.h:156: WARNING: Inline emphasis start-string without end-string.
   include/linux/devfreq.h:261: WARNING: Inline emphasis start-string without end-string.
   include/linux/devfreq.h:281: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/dmaengine/client.rst:203: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/client.rst:204: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/client.rst:210: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/client.rst:211: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/client.rst:220: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/client.rst:221: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/client.rst:229: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/client.rst:230: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/provider.rst:270: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/provider.rst:273: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/dmaengine/provider.rst:288: WARNING: Unexpected indentation.
   Documentation/driver-api/dmaengine/provider.rst:290: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/driver-api/driver-model/driver.rst:215: WARNING: Inline emphasis start-string without end-string.
   Documentation/driver-api/driver-model/driver.rst:215: WARNING: Inline emphasis start-string without end-string.
   Documentation/filesystems/fuse.rst:2: WARNING: Explicit markup ends without a blank line; unexpected unindent.
   Documentation/filesystems/ubifs-authentication.rst:94: WARNING: Inline interpreted text or phrase reference start-string without end-string.
   Documentation/trace/events.rst:589: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:620: WARNING: Inline emphasis start-string without end-string.
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   Documentation/trace/events.rst:697: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:722: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:775: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:814: WARNING: Inline emphasis start-string without end-string.
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   Documentation/trace/events.rst:844: WARNING: Unexpected indentation.
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   Documentation/trace/events.rst:849: WARNING: Unexpected indentation.
   Documentation/trace/events.rst:850: WARNING: Block quote ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:883: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:886: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:889: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:895: WARNING: Bullet list ends without a blank line; unexpected unindent.
   Documentation/trace/events.rst:895: WARNING: Inline emphasis start-string without end-string.
   Documentation/trace/events.rst:968: WARNING: Inline emphasis start-string without end-string.
   fs/inode.c:1608: WARNING: Inline emphasis start-string without end-string.
   fs/inode.c:1608: WARNING: Inline emphasis start-string without end-string.
   fs/inode.c:1614: WARNING: Inline emphasis start-string without end-string.
   fs/seq_file.c:40: WARNING: Inline strong start-string without end-string.

vim +203 drivers/gpu/drm/drm_encoder.c

   184	
   185	/**
   186	 * drm_simple_encoder_init - Init a preallocated encoder
   187	 * @dev: drm device
   188	 * @funcs: callbacks for this encoder
   189	 * @encoder_type: user visible type of the encoder
   190	 * @name: printf style format string for the encoder name, or NULL
   191	 *        for default name
   192	 *
   193	 * Initialises a preallocated encoder that has no further functionality. The
   194	 * encoder will be released automatically.
   195	 *
   196	 * Returns:
   197	 * Zero on success, error code on failure.
   198	 */
   199	int drm_simple_encoder_init(struct drm_device *dev,
   200				    struct drm_encoder *encoder,
   201				    int encoder_type, const char *name, ...)
   202	{
 > 203		char *namestr = NULL;
   204		int ret;
   205	
   206		if (name) {
   207			va_list ap;
   208	
   209			va_start(ap, name);
   210			namestr = kvasprintf(GFP_KERNEL, name, ap);
   211			va_end(ap);
   212			if (!namestr)
   213				return -ENOMEM;
   214		}
   215	
   216		ret = __drm_encoder_init(dev, encoder,
   217					 &drm_simple_encoder_funcs_cleanup,
   218					 encoder_type, namestr);
   219		if (ret)
   220			goto err_kfree;
   221	
   222		return 0;
   223	
   224	err_kfree:
   225		if (name)
   226			kfree(namestr);
   227		return ret;
   228	}
   229	EXPORT_SYMBOL(drm_simple_encoder_init);
   230	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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