diff --git a/drivers/staging/media/atomisp/pci/atomisp_compat.h b/drivers/staging/media/atomisp/pci/atomisp_compat.h
index 64c1bf0943e6..07569f47498d 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_compat.h
+++ b/drivers/staging/media/atomisp/pci/atomisp_compat.h
@@ -442,33 +442,8 @@ int atomisp_css_get_dis_stat(struct atomisp_sub_device *asd,
 
 int atomisp_css_update_stream(struct atomisp_sub_device *asd);
 
-int atomisp_css_create_acc_pipe(struct atomisp_sub_device *asd);
-
-int atomisp_css_start_acc_pipe(struct atomisp_sub_device *asd);
-
-int atomisp_css_stop_acc_pipe(struct atomisp_sub_device *asd);
-
-void atomisp_css_destroy_acc_pipe(struct atomisp_sub_device *asd);
-
-int atomisp_css_load_acc_extension(struct atomisp_sub_device *asd,
-				   struct ia_css_fw_info *fw,
-				   enum ia_css_pipe_id pipe_id,
-				   unsigned int type);
-
-void atomisp_css_unload_acc_extension(struct atomisp_sub_device *asd,
-				      struct ia_css_fw_info *fw,
-				      enum ia_css_pipe_id pipe_id);
-
-int atomisp_css_wait_acc_finish(struct atomisp_sub_device *asd);
-
 void atomisp_css_acc_done(struct atomisp_sub_device *asd);
 
-int atomisp_css_load_acc_binary(struct atomisp_sub_device *asd,
-				struct ia_css_fw_info *fw,
-				unsigned int index);
-
-void atomisp_css_unload_acc_binary(struct atomisp_sub_device *asd);
-
 struct atomisp_acc_fw;
 int atomisp_css_set_acc_parameters(struct atomisp_acc_fw *acc_fw);
 
diff --git a/drivers/staging/media/atomisp/pci/atomisp_compat_css20.c b/drivers/staging/media/atomisp/pci/atomisp_compat_css20.c
index 89002df530b3..51b31e6c4811 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_compat_css20.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_compat_css20.c
@@ -3828,25 +3828,6 @@ void atomisp_css_acc_done(struct atomisp_sub_device *asd)
 	complete(&asd->acc.acc_done);
 }
 
-int atomisp_css_wait_acc_finish(struct atomisp_sub_device *asd)
-{
-	int ret = 0;
-	struct atomisp_device *isp = asd->isp;
-
-	/* Unlock the isp mutex taken in IOCTL handler before sleeping! */
-	rt_mutex_unlock(&isp->mutex);
-	if (wait_for_completion_interruptible_timeout(&asd->acc.acc_done,
-		ATOMISP_ISP_TIMEOUT_DURATION) == 0) {
-		dev_err(isp->dev, "<%s: completion timeout\n", __func__);
-		ia_css_debug_dump_sp_sw_debug_info();
-		ia_css_debug_dump_debug_info(__func__);
-		ret = -EIO;
-	}
-	rt_mutex_lock(&isp->mutex);
-
-	return ret;
-}
-
 /* Set the ACC binary arguments */
 int atomisp_css_set_acc_parameters(struct atomisp_acc_fw *acc_fw)
 {
@@ -3865,204 +3846,6 @@ int atomisp_css_set_acc_parameters(struct atomisp_acc_fw *acc_fw)
 	return 0;
 }
 
-/* Load acc binary extension */
-int atomisp_css_load_acc_extension(struct atomisp_sub_device *asd,
-				   struct ia_css_fw_info *fw,
-				   enum ia_css_pipe_id pipe_id,
-				   unsigned int type)
-{
-	struct ia_css_fw_info **hd;
-
-	fw->next = NULL;
-	hd = &(asd->stream_env[ATOMISP_INPUT_STREAM_GENERAL]
-	       .pipe_configs[pipe_id].acc_extension);
-	while (*hd)
-		hd = &(*hd)->next;
-	*hd = fw;
-
-	asd->stream_env[ATOMISP_INPUT_STREAM_GENERAL]
-	.update_pipe[pipe_id] = true;
-	return 0;
-}
-
-/* Unload acc binary extension */
-void atomisp_css_unload_acc_extension(struct atomisp_sub_device *asd,
-				      struct ia_css_fw_info *fw,
-				      enum ia_css_pipe_id pipe_id)
-{
-	struct ia_css_fw_info **hd;
-
-	hd = &(asd->stream_env[ATOMISP_INPUT_STREAM_GENERAL]
-	       .pipe_configs[pipe_id].acc_extension);
-	while (*hd && *hd != fw)
-		hd = &(*hd)->next;
-	if (!*hd) {
-		dev_err(asd->isp->dev, "did not find acc fw for removal\n");
-		return;
-	}
-	*hd = fw->next;
-	fw->next = NULL;
-
-	asd->stream_env[ATOMISP_INPUT_STREAM_GENERAL]
-	.update_pipe[pipe_id] = true;
-}
-
-int atomisp_css_create_acc_pipe(struct atomisp_sub_device *asd)
-{
-	struct atomisp_device *isp = asd->isp;
-	struct ia_css_pipe_config *pipe_config;
-	struct atomisp_stream_env *stream_env =
-		    &asd->stream_env[ATOMISP_INPUT_STREAM_GENERAL];
-
-	if (stream_env->acc_stream) {
-		if (stream_env->acc_stream_state == CSS_STREAM_STARTED) {
-			if (ia_css_stream_stop(stream_env->acc_stream)
-			    != 0) {
-				dev_err(isp->dev, "stop acc_stream failed.\n");
-				return -EBUSY;
-			}
-		}
-
-		if (ia_css_stream_destroy(stream_env->acc_stream)
-		    != 0) {
-			dev_err(isp->dev, "destroy acc_stream failed.\n");
-			return -EBUSY;
-		}
-		stream_env->acc_stream = NULL;
-	}
-
-	pipe_config = &stream_env->pipe_configs[IA_CSS_PIPE_ID_ACC];
-	ia_css_pipe_config_defaults(pipe_config);
-	asd->acc.acc_stages = kzalloc(MAX_ACC_STAGES *
-				      sizeof(void *), GFP_KERNEL);
-	if (!asd->acc.acc_stages)
-		return -ENOMEM;
-	pipe_config->acc_stages = asd->acc.acc_stages;
-	pipe_config->mode = IA_CSS_PIPE_MODE_ACC;
-	pipe_config->num_acc_stages = 0;
-
-	/*
-	 * We delay the ACC pipeline creation to atomisp_css_start_acc_pipe,
-	 * because pipe configuration will soon be changed by
-	 * atomisp_css_load_acc_binary()
-	 */
-	return 0;
-}
-
-int atomisp_css_start_acc_pipe(struct atomisp_sub_device *asd)
-{
-	struct atomisp_device *isp = asd->isp;
-	struct atomisp_stream_env *stream_env =
-		    &asd->stream_env[ATOMISP_INPUT_STREAM_GENERAL];
-	struct ia_css_pipe_config *pipe_config =
-		    &stream_env->pipe_configs[IA_CSS_PIPE_ID_ACC];
-
-	if (ia_css_pipe_create(pipe_config,
-			       &stream_env->pipes[IA_CSS_PIPE_ID_ACC]) != 0) {
-		dev_err(isp->dev, "%s: ia_css_pipe_create failed\n",
-			__func__);
-		return -EBADE;
-	}
-
-	memset(&stream_env->acc_stream_config, 0,
-	       sizeof(struct ia_css_stream_config));
-	if (ia_css_stream_create(&stream_env->acc_stream_config, 1,
-				 &stream_env->pipes[IA_CSS_PIPE_ID_ACC],
-				 &stream_env->acc_stream) != 0) {
-		dev_err(isp->dev, "%s: create acc_stream error.\n", __func__);
-		return -EINVAL;
-	}
-	stream_env->acc_stream_state = CSS_STREAM_CREATED;
-
-	init_completion(&asd->acc.acc_done);
-	asd->acc.pipeline = stream_env->pipes[IA_CSS_PIPE_ID_ACC];
-
-	atomisp_freq_scaling(isp, ATOMISP_DFS_MODE_MAX, false);
-
-	if (ia_css_start_sp()) {
-		dev_err(isp->dev, "start sp error.\n");
-		return -EIO;
-	}
-
-	if (ia_css_stream_start(stream_env->acc_stream)
-	    != 0) {
-		dev_err(isp->dev, "acc_stream start error.\n");
-		return -EIO;
-	}
-
-	stream_env->acc_stream_state = CSS_STREAM_STARTED;
-	return 0;
-}
-
-int atomisp_css_stop_acc_pipe(struct atomisp_sub_device *asd)
-{
-	struct atomisp_stream_env *stream_env =
-		    &asd->stream_env[ATOMISP_INPUT_STREAM_GENERAL];
-	if (stream_env->acc_stream_state == CSS_STREAM_STARTED) {
-		ia_css_stream_stop(stream_env->acc_stream);
-		stream_env->acc_stream_state = CSS_STREAM_STOPPED;
-	}
-	return 0;
-}
-
-void atomisp_css_destroy_acc_pipe(struct atomisp_sub_device *asd)
-{
-	struct atomisp_stream_env *stream_env =
-		    &asd->stream_env[ATOMISP_INPUT_STREAM_GENERAL];
-	if (stream_env->acc_stream) {
-		if (ia_css_stream_destroy(stream_env->acc_stream)
-		    != 0)
-			dev_warn(asd->isp->dev,
-				 "destroy acc_stream failed.\n");
-		stream_env->acc_stream = NULL;
-	}
-
-	if (stream_env->pipes[IA_CSS_PIPE_ID_ACC]) {
-		if (ia_css_pipe_destroy(stream_env->pipes[IA_CSS_PIPE_ID_ACC])
-		    != 0)
-			dev_warn(asd->isp->dev,
-				 "destroy ACC pipe failed.\n");
-		stream_env->pipes[IA_CSS_PIPE_ID_ACC] = NULL;
-		stream_env->update_pipe[IA_CSS_PIPE_ID_ACC] = false;
-		ia_css_pipe_config_defaults(
-		    &stream_env->pipe_configs[IA_CSS_PIPE_ID_ACC]);
-		ia_css_pipe_extra_config_defaults(
-		    &stream_env->pipe_extra_configs[IA_CSS_PIPE_ID_ACC]);
-	}
-	asd->acc.pipeline = NULL;
-
-	/* css 2.0 API limitation: ia_css_stop_sp() could be only called after
-	 * destroy all pipes
-	 */
-	ia_css_stop_sp();
-
-	kfree(asd->acc.acc_stages);
-	asd->acc.acc_stages = NULL;
-
-	atomisp_freq_scaling(asd->isp, ATOMISP_DFS_MODE_LOW, false);
-}
-
-int atomisp_css_load_acc_binary(struct atomisp_sub_device *asd,
-				struct ia_css_fw_info *fw,
-				unsigned int index)
-{
-	struct ia_css_pipe_config *pipe_config =
-		    &asd->stream_env[ATOMISP_INPUT_STREAM_GENERAL]
-		    .pipe_configs[IA_CSS_PIPE_ID_ACC];
-
-	if (index >= MAX_ACC_STAGES) {
-		dev_dbg(asd->isp->dev, "%s: index(%d) out of range\n",
-			__func__, index);
-		return -ENOMEM;
-	}
-
-	pipe_config->acc_stages[index] = fw;
-	pipe_config->num_acc_stages = index + 1;
-	pipe_config->acc_num_execs = 1;
-
-	return 0;
-}
-
 static struct atomisp_sub_device *__get_atomisp_subdev(
     struct ia_css_pipe *css_pipe,
     struct atomisp_device *isp,
diff --git a/drivers/staging/media/atomisp/pci/atomisp_subdev.h b/drivers/staging/media/atomisp/pci/atomisp_subdev.h
index c2f3ea2c5076..f1e87c3a9dfa 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_subdev.h
+++ b/drivers/staging/media/atomisp/pci/atomisp_subdev.h
@@ -325,7 +325,6 @@ struct atomisp_sub_device {
 	struct {
 		struct ia_css_pipe *pipeline;
 		struct completion acc_done;
-		void *acc_stages;
 	} acc;
 
 	struct atomisp_subdev_params params;
