Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * vimc-streamer.c Virtual Media Controller Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2018 Lucas A. M. Magalhães <lucmaga@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/freezer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/kthread.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include "vimc-streamer.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * vimc_get_source_entity - get the entity connected with the first sink pad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * @ent:	reference media_entity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * Helper function that returns the media entity containing the source pad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * linked with the first sink pad from the given media entity pad list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  * Return: The source pad or NULL, if it wasn't found.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) static struct media_entity *vimc_get_source_entity(struct media_entity *ent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	struct media_pad *pad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	for (i = 0; i < ent->num_pads; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		if (ent->pads[i].flags & MEDIA_PAD_FL_SOURCE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		pad = media_entity_remote_pad(&ent->pads[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		return pad ? pad->entity : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  * vimc_streamer_pipeline_terminate - Disable stream in all ved in stream
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  * @stream: the pointer to the stream structure with the pipeline to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  *	    disabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  * Calls s_stream to disable the stream in each entity of the pipeline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) static void vimc_streamer_pipeline_terminate(struct vimc_stream *stream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct vimc_ent_device *ved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	struct v4l2_subdev *sd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	while (stream->pipe_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		stream->pipe_size--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		ved = stream->ved_pipeline[stream->pipe_size];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		stream->ved_pipeline[stream->pipe_size] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		if (!is_media_entity_v4l2_subdev(ved->ent))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		sd = media_entity_to_v4l2_subdev(ved->ent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		v4l2_subdev_call(sd, video, s_stream, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67)  * vimc_streamer_pipeline_init - Initializes the stream structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69)  * @stream: the pointer to the stream structure to be initialized
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70)  * @ved:    the pointer to the vimc entity initializing the stream
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72)  * Initializes the stream structure. Walks through the entity graph to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73)  * construct the pipeline used later on the streamer thread.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74)  * Calls vimc_streamer_s_stream() to enable stream in all entities of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75)  * the pipeline.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77)  * Return: 0 if success, error code otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) static int vimc_streamer_pipeline_init(struct vimc_stream *stream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 				       struct vimc_ent_device *ved)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	struct media_entity *entity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	struct video_device *vdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	struct v4l2_subdev *sd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	stream->pipe_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	while (stream->pipe_size < VIMC_STREAMER_PIPELINE_MAX_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		if (!ved) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			vimc_streamer_pipeline_terminate(stream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		stream->ved_pipeline[stream->pipe_size++] = ved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		if (is_media_entity_v4l2_subdev(ved->ent)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			sd = media_entity_to_v4l2_subdev(ved->ent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			ret = v4l2_subdev_call(sd, video, s_stream, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			if (ret && ret != -ENOIOCTLCMD) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 				dev_err(ved->dev, "subdev_call error %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 					ved->ent->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 				vimc_streamer_pipeline_terminate(stream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 				return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		entity = vimc_get_source_entity(ved->ent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		/* Check if the end of the pipeline was reached */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		if (!entity) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 			/* the first entity of the pipe should be source only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 			if (!vimc_is_source(ved->ent)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 				dev_err(ved->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 					"first entity in the pipe '%s' is not a source\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 					ved->ent->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 				vimc_streamer_pipeline_terminate(stream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 				return -EPIPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		/* Get the next device in the pipeline */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		if (is_media_entity_v4l2_subdev(entity)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			sd = media_entity_to_v4l2_subdev(entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			ved = v4l2_get_subdevdata(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			vdev = container_of(entity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 					    struct video_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 					    entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			ved = video_get_drvdata(vdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	vimc_streamer_pipeline_terminate(stream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)  * vimc_streamer_thread - Process frames through the pipeline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)  * @data:	vimc_stream struct of the current stream
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)  * From the source to the sink, gets a frame from each subdevice and send to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)  * the next one of the pipeline at a fixed framerate.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)  * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)  * Always zero (created as ``int`` instead of ``void`` to comply with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)  * kthread API).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static int vimc_streamer_thread(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	struct vimc_stream *stream = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	u8 *frame = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	set_freezable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		try_to_freeze();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		if (kthread_should_stop())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		for (i = stream->pipe_size - 1; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			frame = stream->ved_pipeline[i]->process_frame(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 					stream->ved_pipeline[i], frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 			if (!frame || IS_ERR(frame))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		//wait for 60hz
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		set_current_state(TASK_UNINTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		schedule_timeout(HZ / 60);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)  * vimc_streamer_s_stream - Start/stop the streaming on the media pipeline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)  * @stream:	the pointer to the stream structure of the current stream
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)  * @ved:	pointer to the vimc entity of the entity of the stream
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)  * @enable:	flag to determine if stream should start/stop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)  * When starting, check if there is no ``stream->kthread`` allocated. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)  * should indicate that a stream is already running. Then, it initializes the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)  * pipeline, creates and runs a kthread to consume buffers through the pipeline.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)  * When stopping, analogously check if there is a stream running, stop the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)  * thread and terminates the pipeline.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)  * Return: 0 if success, error code otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) int vimc_streamer_s_stream(struct vimc_stream *stream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			   struct vimc_ent_device *ved,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 			   int enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	if (!stream || !ved)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	if (enable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		if (stream->kthread)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		ret = vimc_streamer_pipeline_init(stream, ved);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		stream->kthread = kthread_run(vimc_streamer_thread, stream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 					      "vimc-streamer thread");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		if (IS_ERR(stream->kthread)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 			ret = PTR_ERR(stream->kthread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 			dev_err(ved->dev, "kthread_run failed with %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 			vimc_streamer_pipeline_terminate(stream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 			stream->kthread = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		if (!stream->kthread)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		ret = kthread_stop(stream->kthread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		 * kthread_stop returns -EINTR in cases when streamon was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		 * immediately followed by streamoff, and the thread didn't had
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		 * a chance to run. Ignore errors to stop the stream in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		 * pipeline.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 			dev_dbg(ved->dev, "kthread_stop returned '%d'\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		stream->kthread = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		vimc_streamer_pipeline_terminate(stream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }