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246 lines
8.0 KiB
246 lines
8.0 KiB
/* |
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* v4l2-mc.h - Media Controller V4L2 types and prototypes |
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* |
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* Copyright (C) 2016 Mauro Carvalho Chehab <[email protected]> |
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* Copyright (C) 2006-2010 Nokia Corporation |
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* Copyright (c) 2016 Intel Corporation. |
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* |
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* 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 |
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* 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. |
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*/ |
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#ifndef _V4L2_MC_H |
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#define _V4L2_MC_H |
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#include <media/media-device.h> |
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#include <media/v4l2-dev.h> |
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#include <linux/types.h> |
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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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* 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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* 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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* 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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}; |
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/* We don't need to include pci.h or usb.h here */ |
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struct pci_dev; |
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struct usb_device; |
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#ifdef CONFIG_MEDIA_CONTROLLER |
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/** |
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* v4l2_mc_create_media_graph() - create Media Controller links at the graph. |
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* |
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* @mdev: pointer to the &media_device struct. |
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* |
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* Add links between the entities commonly found on PC customer's hardware at |
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* the V4L2 side: camera sensors, audio and video PLL-IF decoders, tuners, |
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* analog TV decoder and I/O entities (video, VBI and Software Defined Radio). |
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* |
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* .. note:: |
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* |
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* Webcams are modelled on a very simple way: the sensor is |
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* connected directly to the I/O entity. All dirty details, like |
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* scaler and crop HW are hidden. While such mapping is enough for v4l2 |
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* interface centric PC-consumer's hardware, V4L2 subdev centric camera |
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* hardware should not use this routine, as it will not build the right graph. |
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*/ |
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int v4l2_mc_create_media_graph(struct media_device *mdev); |
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/** |
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* v4l_enable_media_source() - Hold media source for exclusive use |
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* if free |
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* |
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* @vdev: pointer to struct video_device |
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* |
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* This interface calls enable_source handler to determine if |
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* media source is free for use. The enable_source handler is |
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* responsible for checking is the media source is free and |
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* start a pipeline between the media source and the media |
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* entity associated with the video device. This interface |
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* should be called from v4l2-core and dvb-core interfaces |
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* that change the source configuration. |
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* |
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* Return: returns zero on success or a negative error code. |
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*/ |
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int v4l_enable_media_source(struct video_device *vdev); |
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/** |
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* v4l_disable_media_source() - Release media source |
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* |
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* @vdev: pointer to struct video_device |
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* |
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* This interface calls disable_source handler to release |
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* the media source. The disable_source handler stops the |
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* active media pipeline between the media source and the |
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* media entity associated with the video device. |
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* |
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* Return: returns zero on success or a negative error code. |
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*/ |
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void v4l_disable_media_source(struct video_device *vdev); |
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/* |
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* v4l_vb2q_enable_media_tuner - Hold media source for exclusive use |
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* if free. |
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* @q - pointer to struct vb2_queue |
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* |
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* Wrapper for v4l_enable_media_source(). This function should |
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* be called from v4l2-core to enable the media source with |
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* pointer to struct vb2_queue as the input argument. Some |
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* v4l2-core interfaces don't have access to video device and |
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* this interface finds the struct video_device for the q and |
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* calls v4l_enable_media_source(). |
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*/ |
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int v4l_vb2q_enable_media_source(struct vb2_queue *q); |
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/** |
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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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* |
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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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* |
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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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* |
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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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*/ |
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int v4l2_pipeline_pm_use(struct media_entity *entity, int use); |
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/** |
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* v4l2_pipeline_link_notify - Link management notification callback |
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* @link: The link |
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* @flags: New link flags that will be applied |
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* @notification: The link's state change notification type (MEDIA_DEV_NOTIFY_*) |
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* |
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* React to link management on powered pipelines by updating the use count of |
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* all entities in the source and sink sides of the link. Entities are powered |
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* 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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* |
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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. This function will not fail for disconnection |
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* events. |
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*/ |
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int v4l2_pipeline_link_notify(struct media_link *link, u32 flags, |
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unsigned int notification); |
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#else /* CONFIG_MEDIA_CONTROLLER */ |
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static inline int v4l2_mc_create_media_graph(struct media_device *mdev) |
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{ |
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return 0; |
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} |
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static inline int v4l_enable_media_source(struct video_device *vdev) |
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{ |
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return 0; |
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} |
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static inline void v4l_disable_media_source(struct video_device *vdev) |
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{ |
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} |
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static inline int v4l_vb2q_enable_media_source(struct vb2_queue *q) |
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{ |
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return 0; |
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} |
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static inline int v4l2_pipeline_pm_use(struct media_entity *entity, int use) |
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{ |
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return 0; |
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} |
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static inline int v4l2_pipeline_link_notify(struct media_link *link, u32 flags, |
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unsigned int notification) |
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{ |
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return 0; |
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} |
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#endif /* CONFIG_MEDIA_CONTROLLER */ |
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#endif /* _V4L2_MC_H */
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