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2024-01-31 f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 
 kernel/include/media/v4l2-mc.h
....@@ -1,19 +1,10 @@
1
+/* SPDX-License-Identifier: GPL-2.0-or-later */
12 /*
23  * v4l2-mc.h - Media Controller V4L2 types and prototypes
34  *
45  * Copyright (C) 2016 Mauro Carvalho Chehab <mchehab@kernel.org>
56  * Copyright (C) 2006-2010 Nokia Corporation
67  * Copyright (c) 2016 Intel Corporation.
7
- *
8
- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
10
- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
178  */
189 
1910 #ifndef _V4L2_MC_H
....@@ -21,85 +12,8 @@
2112 
2213 #include <media/media-device.h>
2314 #include <media/v4l2-dev.h>
15
+#include <media/v4l2-subdev.h>
2416 #include <linux/types.h>
25
-
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-/**
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- * enum tuner_pad_index - tuner pad index for MEDIA_ENT_F_TUNER
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- *
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- * @TUNER_PAD_RF_INPUT:	Radiofrequency (RF) sink pad, usually linked to a
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- *			RF connector entity.
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- * @TUNER_PAD_OUTPUT:	Tuner video output source pad. Contains the video
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- *			chrominance and luminance or the hole bandwidth
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- *			of the signal converted to an Intermediate Frequency
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- *			(IF) or to baseband (on zero-IF tuners).
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- * @TUNER_PAD_AUD_OUT:	Tuner audio output source pad. Tuners used to decode
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- *			analog TV signals have an extra pad for audio output.
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- *			Old tuners use an analog stage with a saw filter for
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- *			the audio IF frequency. The output of the pad is, in
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- *			this case, the audio IF, with should be decoded either
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- *			by the bridge chipset (that's the case of cx2388x
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- *			chipsets) or may require an external IF sound
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- *			processor, like msp34xx. On modern silicon tuners,
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- *			the audio IF decoder is usually incorporated at the
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- *			tuner. On such case, the output of this pad is an
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- *			audio sampled data.
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- * @TUNER_NUM_PADS:	Number of pads of the tuner.
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- */
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-enum tuner_pad_index {
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-	TUNER_PAD_RF_INPUT,
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-	TUNER_PAD_OUTPUT,
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-	TUNER_PAD_AUD_OUT,
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-	TUNER_NUM_PADS
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-};
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-
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-/**
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- * enum if_vid_dec_pad_index - video IF-PLL pad index for
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- *			   MEDIA_ENT_F_IF_VID_DECODER
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- *
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- * @IF_VID_DEC_PAD_IF_INPUT:	video Intermediate Frequency (IF) sink pad
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- * @IF_VID_DEC_PAD_OUT:		IF-PLL video output source pad. Contains the
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- *				video chrominance and luminance IF signals.
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- * @IF_VID_DEC_PAD_NUM_PADS:	Number of pads of the video IF-PLL.
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- */
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-enum if_vid_dec_pad_index {
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-	IF_VID_DEC_PAD_IF_INPUT,
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-	IF_VID_DEC_PAD_OUT,
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-	IF_VID_DEC_PAD_NUM_PADS
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-};
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-
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-/**
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- * enum if_aud_dec_pad_index - audio/sound IF-PLL pad index for
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- *			   MEDIA_ENT_F_IF_AUD_DECODER
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- *
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- * @IF_AUD_DEC_PAD_IF_INPUT:	audio Intermediate Frequency (IF) sink pad
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- * @IF_AUD_DEC_PAD_OUT:		IF-PLL audio output source pad. Contains the
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- *				audio sampled stream data, usually connected
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- *				to the bridge bus via an Inter-IC Sound (I2S)
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- *				bus.
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- * @IF_AUD_DEC_PAD_NUM_PADS:	Number of pads of the audio IF-PLL.
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- */
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-enum if_aud_dec_pad_index {
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-	IF_AUD_DEC_PAD_IF_INPUT,
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-	IF_AUD_DEC_PAD_OUT,
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-	IF_AUD_DEC_PAD_NUM_PADS
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-};
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-
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-/**
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- * enum demod_pad_index - analog TV pad index for MEDIA_ENT_F_ATV_DECODER
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- *
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- * @DEMOD_PAD_IF_INPUT:	IF input sink pad.
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- * @DEMOD_PAD_VID_OUT:	Video output source pad.
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- * @DEMOD_PAD_VBI_OUT:	Vertical Blank Interface (VBI) output source pad.
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- * @DEMOD_PAD_AUDIO_OUT: Audio output source pad.
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- * @DEMOD_NUM_PADS:	Maximum number of output pads.
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- */
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-enum demod_pad_index {
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-	DEMOD_PAD_IF_INPUT,
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-	DEMOD_PAD_VID_OUT,
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-	DEMOD_PAD_VBI_OUT,
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-	DEMOD_PAD_AUDIO_OUT,
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-	DEMOD_NUM_PADS
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-};
10317 
10418 /* We don't need to include pci.h or usb.h here */
10519 struct pci_dev;
....@@ -171,25 +85,79 @@
17185  */
17286 int v4l_vb2q_enable_media_source(struct vb2_queue *q);
17387 
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+/**
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+ * v4l2_create_fwnode_links_to_pad - Create fwnode-based links from a
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+ *                                   source subdev to a sink subdev pad.
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+ *
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+ * @src_sd: pointer to a source subdev
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+ * @sink:  pointer to a subdev sink pad
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+ *
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+ * This function searches for fwnode endpoint connections from a source
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+ * subdevice to a single sink pad, and if suitable connections are found,
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+ * translates them into media links to that pad. The function can be
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+ * called by the sink subdevice, in its v4l2-async notifier subdev bound
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+ * callback, to create links from a bound source subdevice.
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+ *
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+ * .. note::
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+ *
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+ *    Any sink subdevice that calls this function must implement the
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+ *    .get_fwnode_pad media operation in order to verify endpoints passed
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+ *    to the sink are owned by the sink.
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+ *
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+ * Return 0 on success or a negative error code on failure.
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+ */
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+int v4l2_create_fwnode_links_to_pad(struct v4l2_subdev *src_sd,
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+				    struct media_pad *sink);
174111 
175112 /**
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- * v4l2_pipeline_pm_use - Update the use count of an entity
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- * @entity: The entity
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- * @use: Use (1) or stop using (0) the entity
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+ * v4l2_create_fwnode_links - Create fwnode-based links from a source
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+ *                            subdev to a sink subdev.
179115  *
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- * Update the use count of all entities in the pipeline and power entities on or
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- * off accordingly.
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+ * @src_sd: pointer to a source subdevice
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+ * @sink_sd: pointer to a sink subdevice
182118  *
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- * This function is intended to be called in video node open (use ==
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- * 1) and release (use == 0). It uses struct media_entity.use_count to
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- * track the power status. The use of this function should be paired
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- * with v4l2_pipeline_link_notify().
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+ * This function searches for any and all fwnode endpoint connections
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+ * between source and sink subdevices, and translates them into media
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+ * links. The function can be called by the sink subdevice, in its
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+ * v4l2-async notifier subdev bound callback, to create all links from
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+ * a bound source subdevice.
187124  *
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- * Return 0 on success or a negative error code on failure. Powering entities
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- * off is assumed to never fail. No failure can occur when the use parameter is
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- * set to 0.
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+ * .. note::
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+ *
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+ *    Any sink subdevice that calls this function must implement the
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+ *    .get_fwnode_pad media operation in order to verify endpoints passed
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+ *    to the sink are owned by the sink.
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+ *
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+ * Return 0 on success or a negative error code on failure.
191132  */
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-int v4l2_pipeline_pm_use(struct media_entity *entity, int use);
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+int v4l2_create_fwnode_links(struct v4l2_subdev *src_sd,
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+			     struct v4l2_subdev *sink_sd);
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+
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+/**
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+ * v4l2_pipeline_pm_get - Increase the use count of a pipeline
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+ * @entity: The root entity of a pipeline
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+ *
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+ * Update the use count of all entities in the pipeline and power entities on.
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+ *
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+ * This function is intended to be called in video node open. It uses
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+ * struct media_entity.use_count to track the power status. The use
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+ * of this function should be paired with v4l2_pipeline_link_notify().
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+ *
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+ * Return 0 on success or a negative error code on failure.
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+ */
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+int v4l2_pipeline_pm_get(struct media_entity *entity);
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+
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+/**
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+ * v4l2_pipeline_pm_put - Decrease the use count of a pipeline
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+ * @entity: The root entity of a pipeline
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+ *
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+ * Update the use count of all entities in the pipeline and power entities off.
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+ *
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+ * This function is intended to be called in video node release. It uses
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+ * struct media_entity.use_count to track the power status. The use
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+ * of this function should be paired with v4l2_pipeline_link_notify().
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+ */
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+void v4l2_pipeline_pm_put(struct media_entity *entity);
193161 
194162 
195163 /**
....@@ -201,7 +169,7 @@
201169  * React to link management on powered pipelines by updating the use count of
202170  * all entities in the source and sink sides of the link. Entities are powered
203171  * on or off accordingly. The use of this function should be paired
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- * with v4l2_pipeline_pm_use().
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+ * with v4l2_pipeline_pm_{get,put}().
205173  *
206174  * Return 0 on success or a negative error code on failure. Powering entities
207175  * off is assumed to never fail. This function will not fail for disconnection
....@@ -231,11 +199,14 @@
231199 	return 0;
232200 }
233201 
234
-static inline int v4l2_pipeline_pm_use(struct media_entity *entity, int use)
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+static inline int v4l2_pipeline_pm_get(struct media_entity *entity)
235203 {
236204 	return 0;
237205 }
238206 
207
+static inline void v4l2_pipeline_pm_put(struct media_entity *entity)
208
+{}
209
+
239210 static inline int v4l2_pipeline_link_notify(struct media_link *link, u32 flags,
240211 					    unsigned int notification)
241212 {