From patchwork Wed May 29 15:28:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Scally X-Patchwork-Id: 102029 Received: from ny.mirrors.kernel.org ([147.75.199.223]) by linuxtv.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1sCLFu-0007vN-16 for patchwork@linuxtv.org; Wed, 29 May 2024 15:30:23 +0000 Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ny.mirrors.kernel.org (Postfix) with ESMTPS id 3B0AF1C221AD for ; Wed, 29 May 2024 15:30:21 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 7FFC5746E; Wed, 29 May 2024 15:29:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="uFxecbGh" X-Original-To: linux-media@vger.kernel.org Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2B67C181D1C; Wed, 29 May 2024 15:29:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716996581; cv=none; b=KdLpyuvV8N3qJUXI+pCmL9+L3NQjtRu79/4d+XEzl0T7TWjmoB6mZ7WRjEjozO/PBed2RkUhNNuJinV3aAimyOAnRTZ5T6ROK+ZV7fnFoZHVa5yYHS4OmwEWFe7E4T4sa3VG+dLQu8qDw5hBTu2H15VukJkaZlVLhd4lk20yJY8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716996581; c=relaxed/simple; bh=XxcGSyPAiUZ/hh5eIE+k+9lAAocmer1k9qTXVmiX/bw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=R1Gb7MQsspefeFenUKX+1dKM7vP/xGb2Cr0aVctd1OPlF0z4Tom5hH1uaO4U/dLE4WRWlYr93tq7tyQKBkQW6ipeYsK3iY66/3S7foO1quJMJ1xyt39m8BX3QlT/jseQh755HTNNR+W6M3S+99QzyKnUs1+AjJofhUhpf/spycM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=uFxecbGh; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Received: from mail.ideasonboard.com (cpc141996-chfd3-2-0-cust928.12-3.cable.virginm.net [86.13.91.161]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id ED6692F62; Wed, 29 May 2024 17:29:21 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1716996562; bh=XxcGSyPAiUZ/hh5eIE+k+9lAAocmer1k9qTXVmiX/bw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uFxecbGh6SzBSyIAXuF66EmBBRlZJeU6JfZJ8AgMuGkl/n/vyLmIO/qteYxwWg7up f6rKNQhxDxXRUwrOO6JRDhJkQRj+xOZqNA5u9UnA+3AOc5o6Lz/Rh7VEVqRUp+yGO3 e9aC1V2cSLQglEmJ4KwCVJzooQubiProqYaAfI7k= From: Daniel Scally To: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: jacopo.mondi@ideasonboard.com, nayden.kanchev@arm.com, robh+dt@kernel.org, mchehab@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, jerome.forissier@linaro.org, kieran.bingham@ideasonboard.com, laurent.pinchart@ideasonboard.com, sakari.ailus@iki.fi, dan.scally@ideasonboard.com Subject: [PATCH v5 10/16] media: platform: Add mali-c55 3a stats devnode Date: Wed, 29 May 2024 16:28:52 +0100 Message-Id: <20240529152858.183799-11-dan.scally@ideasonboard.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240529152858.183799-1-dan.scally@ideasonboard.com> References: <20240529152858.183799-1-dan.scally@ideasonboard.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-LSpam-Score: -2.6 (--) X-LSpam-Report: No, score=-2.6 required=5.0 tests=ARC_SIGNED=0.001,ARC_VALID=-0.1,BAYES_00=-1.9,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,DMARC_MISSING=0.001,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1,SPF_HELO_NONE=0.001,SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no Add a new code file to govern the 3a statistics capture node. Acked-by: Nayden Kanchev Co-developed-by: Jacopo Mondi Signed-off-by: Jacopo Mondi Signed-off-by: Daniel Scally --- Changes in v5: - New patch drivers/media/platform/arm/mali-c55/Makefile | 3 +- .../platform/arm/mali-c55/mali-c55-common.h | 28 ++ .../platform/arm/mali-c55/mali-c55-core.c | 15 + .../platform/arm/mali-c55/mali-c55-isp.c | 1 + .../arm/mali-c55/mali-c55-registers.h | 3 + .../platform/arm/mali-c55/mali-c55-stats.c | 350 ++++++++++++++++++ 6 files changed, 399 insertions(+), 1 deletion(-) create mode 100644 drivers/media/platform/arm/mali-c55/mali-c55-stats.c diff --git a/drivers/media/platform/arm/mali-c55/Makefile b/drivers/media/platform/arm/mali-c55/Makefile index 77dcb2fbf0f4..cd5a64bf0c62 100644 --- a/drivers/media/platform/arm/mali-c55/Makefile +++ b/drivers/media/platform/arm/mali-c55/Makefile @@ -4,6 +4,7 @@ mali-c55-y := mali-c55-capture.o \ mali-c55-core.o \ mali-c55-isp.o \ mali-c55-tpg.o \ - mali-c55-resizer.o + mali-c55-resizer.o \ + mali-c55-stats.o obj-$(CONFIG_VIDEO_MALI_C55) += mali-c55.o diff --git a/drivers/media/platform/arm/mali-c55/mali-c55-common.h b/drivers/media/platform/arm/mali-c55/mali-c55-common.h index 2d0c4d152beb..44119e04009b 100644 --- a/drivers/media/platform/arm/mali-c55/mali-c55-common.h +++ b/drivers/media/platform/arm/mali-c55/mali-c55-common.h @@ -79,6 +79,7 @@ enum mali_c55_isp_pads { MALI_C55_ISP_PAD_SINK_VIDEO, MALI_C55_ISP_PAD_SOURCE, MALI_C55_ISP_PAD_SOURCE_BYPASS, + MALI_C55_ISP_PAD_SOURCE_3A, MALI_C55_ISP_NUM_PADS, }; @@ -194,6 +195,28 @@ struct mali_c55_cap_dev { bool streaming; }; +struct mali_c55_stats_buf { + struct vb2_v4l2_buffer vb; + spinlock_t lock; + unsigned int segments_remaining; + struct list_head queue; + bool failed; +}; + +struct mali_c55_stats { + struct mali_c55 *mali_c55; + struct video_device vdev; + struct dma_chan *channel; + struct vb2_queue queue; + struct media_pad pad; + struct mutex lock; + + struct { + spinlock_t lock; + struct list_head queue; + } buffers; +}; + enum mali_c55_config_spaces { MALI_C55_CONFIG_PING, MALI_C55_CONFIG_PONG, @@ -224,6 +247,7 @@ struct mali_c55 { struct mali_c55_isp isp; struct mali_c55_resizer resizers[MALI_C55_NUM_RZRS]; struct mali_c55_cap_dev cap_devs[MALI_C55_NUM_CAP_DEVS]; + struct mali_c55_stats stats; struct list_head contexts; enum mali_c55_config_spaces next_config; @@ -245,6 +269,8 @@ int mali_c55_register_resizers(struct mali_c55 *mali_c55); void mali_c55_unregister_resizers(struct mali_c55 *mali_c55); int mali_c55_register_capture_devs(struct mali_c55 *mali_c55); void mali_c55_unregister_capture_devs(struct mali_c55 *mali_c55); +int mali_c55_register_stats(struct mali_c55 *mali_c55); +void mali_c55_unregister_stats(struct mali_c55 *mali_c55); struct mali_c55_ctx *mali_c55_get_active_context(struct mali_c55 *mali_c55); void mali_c55_set_plane_done(struct mali_c55_cap_dev *cap_dev, enum mali_c55_planes plane); @@ -262,5 +288,7 @@ mali_c55_isp_fmt_next(const struct mali_c55_isp_fmt *fmt); bool mali_c55_isp_is_format_supported(unsigned int mbus_code); #define for_each_mali_isp_fmt(fmt)\ for ((fmt) = NULL; ((fmt) = mali_c55_isp_fmt_next((fmt)));) +void mali_c55_stats_fill_buffer(struct mali_c55 *mali_c55, + enum mali_c55_config_spaces cfg_space); #endif /* _MALI_C55_COMMON_H */ diff --git a/drivers/media/platform/arm/mali-c55/mali-c55-core.c b/drivers/media/platform/arm/mali-c55/mali-c55-core.c index 50caf5ee7474..9ea70010876c 100644 --- a/drivers/media/platform/arm/mali-c55/mali-c55-core.c +++ b/drivers/media/platform/arm/mali-c55/mali-c55-core.c @@ -337,6 +337,16 @@ static int mali_c55_create_links(struct mali_c55 *mali_c55) } } + ret = media_create_pad_link(&mali_c55->isp.sd.entity, + MALI_C55_ISP_PAD_SOURCE_3A, + &mali_c55->stats.vdev.entity, 0, + MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE); + if (ret) { + dev_err(mali_c55->dev, + "failed to link ISP and 3a stats node\n"); + goto err_remove_links; + } + return 0; err_remove_links: @@ -350,6 +360,7 @@ static void mali_c55_unregister_entities(struct mali_c55 *mali_c55) mali_c55_unregister_isp(mali_c55); mali_c55_unregister_resizers(mali_c55); mali_c55_unregister_capture_devs(mali_c55); + mali_c55_unregister_stats(mali_c55); } static int mali_c55_register_entities(struct mali_c55 *mali_c55) @@ -372,6 +383,10 @@ static int mali_c55_register_entities(struct mali_c55 *mali_c55) if (ret) goto err_unregister_entities; + ret = mali_c55_register_stats(mali_c55); + if (ret) + goto err_unregister_entities; + ret = mali_c55_create_links(mali_c55); if (ret) goto err_unregister_entities; diff --git a/drivers/media/platform/arm/mali-c55/mali-c55-isp.c b/drivers/media/platform/arm/mali-c55/mali-c55-isp.c index ea8b7b866e7a..94876fba3353 100644 --- a/drivers/media/platform/arm/mali-c55/mali-c55-isp.c +++ b/drivers/media/platform/arm/mali-c55/mali-c55-isp.c @@ -564,6 +564,7 @@ int mali_c55_register_isp(struct mali_c55 *mali_c55) isp->pads[MALI_C55_ISP_PAD_SINK_VIDEO].flags = MEDIA_PAD_FL_SINK; isp->pads[MALI_C55_ISP_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE; isp->pads[MALI_C55_ISP_PAD_SOURCE_BYPASS].flags = MEDIA_PAD_FL_SOURCE; + isp->pads[MALI_C55_ISP_PAD_SOURCE_3A].flags = MEDIA_PAD_FL_SOURCE; ret = media_entity_pads_init(&sd->entity, MALI_C55_ISP_NUM_PADS, isp->pads); diff --git a/drivers/media/platform/arm/mali-c55/mali-c55-registers.h b/drivers/media/platform/arm/mali-c55/mali-c55-registers.h index cb27abde2aa5..eb3719245ec3 100644 --- a/drivers/media/platform/arm/mali-c55/mali-c55-registers.h +++ b/drivers/media/platform/arm/mali-c55/mali-c55-registers.h @@ -68,6 +68,9 @@ #define MALI_C55_VC_START(v) ((v) & 0xffff) #define MALI_C55_VC_SIZE(v) (((v) & 0xffff) << 16) +#define MALI_C55_REG_1024BIN_HIST 0x054a8 +#define MALI_C55_1024BIN_HIST_SIZE 4096 + /* Ping/Pong Configuration Space */ #define MALI_C55_REG_BASE_ADDR 0x18e88 #define MALI_C55_REG_BYPASS_0 0x18eac diff --git a/drivers/media/platform/arm/mali-c55/mali-c55-stats.c b/drivers/media/platform/arm/mali-c55/mali-c55-stats.c new file mode 100644 index 000000000000..aa40480ed814 --- /dev/null +++ b/drivers/media/platform/arm/mali-c55/mali-c55-stats.c @@ -0,0 +1,350 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ARM Mali-C55 ISP Driver - 3A Statistics capture device + * + * Copyright (C) 2023 Ideas on Board Oy + */ + +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#include "mali-c55-common.h" +#include "mali-c55-registers.h" + +static unsigned int metering_space_addrs[] = { + [MALI_C55_CONFIG_PING] = 0x095AC, + [MALI_C55_CONFIG_PONG] = 0x2156C, +}; + +static int mali_c55_stats_enum_fmt_meta_cap(struct file *file, void *fh, + struct v4l2_fmtdesc *f) +{ + if (f->index || f->type != V4L2_BUF_TYPE_META_CAPTURE) + return -EINVAL; + + f->pixelformat = V4L2_META_FMT_MALI_C55_3A_STATS; + + return 0; +} + +static int mali_c55_stats_g_fmt_meta_cap(struct file *file, void *fh, + struct v4l2_format *f) +{ + static const struct v4l2_meta_format mfmt = { + .dataformat = V4L2_META_FMT_MALI_C55_3A_STATS, + .buffersize = sizeof(struct mali_c55_stats_buffer) + }; + + if (f->type != V4L2_BUF_TYPE_META_CAPTURE) + return -EINVAL; + + f->fmt.meta = mfmt; + + return 0; +} + +static int mali_c55_stats_querycap(struct file *file, + void *priv, struct v4l2_capability *cap) +{ + strscpy(cap->driver, MALI_C55_DRIVER_NAME, sizeof(cap->driver)); + strscpy(cap->card, "ARM Mali-C55 ISP", sizeof(cap->card)); + + return 0; +} + +static const struct v4l2_ioctl_ops mali_c55_stats_v4l2_ioctl_ops = { + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_expbuf = vb2_ioctl_expbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + .vidioc_enum_fmt_meta_cap = mali_c55_stats_enum_fmt_meta_cap, + .vidioc_g_fmt_meta_cap = mali_c55_stats_g_fmt_meta_cap, + .vidioc_s_fmt_meta_cap = mali_c55_stats_g_fmt_meta_cap, + .vidioc_try_fmt_meta_cap = mali_c55_stats_g_fmt_meta_cap, + .vidioc_querycap = mali_c55_stats_querycap, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +static const struct v4l2_file_operations mali_c55_stats_v4l2_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = video_ioctl2, + .open = v4l2_fh_open, + .release = vb2_fop_release, + .poll = vb2_fop_poll, + .mmap = vb2_fop_mmap, +}; + +static int +mali_c55_stats_queue_setup(struct vb2_queue *q, unsigned int *num_buffers, + unsigned int *num_planes, unsigned int sizes[], + struct device *alloc_devs[]) +{ + struct mali_c55_stats *stats = vb2_get_drv_priv(q); + + if (*num_planes && *num_planes > 1) + return -EINVAL; + + if (sizes[0] && sizes[0] != sizeof(struct mali_c55_stats_buffer)) + return -EINVAL; + + *num_planes = 1; + sizes[0] = sizeof(struct mali_c55_stats_buffer); + + if (stats->channel) + alloc_devs[0] = stats->channel->device->dev; + + return 0; +} + +static void mali_c55_stats_buf_queue(struct vb2_buffer *vb) +{ + struct mali_c55_stats *stats = vb2_get_drv_priv(vb->vb2_queue); + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct mali_c55_stats_buf *buf = container_of(vbuf, + struct mali_c55_stats_buf, vb); + + vb2_set_plane_payload(vb, 0, sizeof(struct mali_c55_stats_buffer)); + buf->segments_remaining = 2; + buf->failed = false; + + spin_lock(&stats->buffers.lock); + list_add_tail(&buf->queue, &stats->buffers.queue); + spin_unlock(&stats->buffers.lock); +} + +static void mali_c55_stats_stop_streaming(struct vb2_queue *q) +{ + struct mali_c55_stats *stats = vb2_get_drv_priv(q); + struct mali_c55_stats_buf *buf, *tmp; + + spin_lock(&stats->buffers.lock); + + list_for_each_entry_safe(buf, tmp, &stats->buffers.queue, queue) { + list_del(&buf->queue); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + } + + spin_unlock(&stats->buffers.lock); +} + +static const struct vb2_ops mali_c55_stats_vb2_ops = { + .queue_setup = mali_c55_stats_queue_setup, + .buf_queue = mali_c55_stats_buf_queue, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .stop_streaming = mali_c55_stats_stop_streaming, +}; + +static void +mali_c55_stats_metering_complete(void *param, + const struct dmaengine_result *result) +{ + struct mali_c55_stats_buf *buf = param; + + spin_lock(&buf->lock); + + if (buf->failed) + goto out_unlock; + + buf->vb.vb2_buf.timestamp = ktime_get_boottime_ns(); + + if (result->result != DMA_TRANS_NOERROR) { + buf->failed = true; + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + goto out_unlock; + } + + if (!--buf->segments_remaining) + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); + +out_unlock: + spin_unlock(&buf->lock); +} + +static int mali_c55_stats_dma_xfer(struct mali_c55_stats *stats, dma_addr_t src, + dma_addr_t dst, + struct mali_c55_stats_buf *buf, + size_t length, + void (*callback)(void *, const struct dmaengine_result *result)) +{ + struct dma_async_tx_descriptor *tx; + dma_cookie_t cookie; + + tx = dmaengine_prep_dma_memcpy(stats->channel, dst, src, length, 0); + if (!tx) { + dev_err(stats->mali_c55->dev, "failed to prep stats DMA\n"); + return -EIO; + } + + tx->callback_result = callback; + tx->callback_param = buf; + + cookie = dmaengine_submit(tx); + if (dma_submit_error(cookie)) { + dev_err(stats->mali_c55->dev, "failed to submit stats DMA\n"); + return -EIO; + } + + dma_async_issue_pending(stats->channel); + return 0; +} + +void mali_c55_stats_fill_buffer(struct mali_c55 *mali_c55, + enum mali_c55_config_spaces cfg_space) +{ + struct mali_c55_ctx *ctx = mali_c55_get_active_context(mali_c55); + struct mali_c55_stats *stats = &mali_c55->stats; + struct mali_c55_stats_buf *buf = NULL; + dma_addr_t src, dst; + int ret; + + spin_lock(&stats->buffers.lock); + if (!list_empty(&stats->buffers.queue)) { + buf = list_first_entry(&stats->buffers.queue, + struct mali_c55_stats_buf, queue); + list_del(&buf->queue); + } + spin_unlock(&stats->buffers.lock); + + if (!buf) + return; + + buf->vb.sequence = mali_c55->isp.frame_sequence; + + /* + * There are infact two noncontiguous sections of the ISP's + * memory space that hold statistics for 3a algorithms to use. A + * section in each config space and a global section holding + * histograms which is double buffered and so holds data for the + * last frame. We need to read both. + */ + src = ctx->base + MALI_C55_REG_1024BIN_HIST; + dst = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0); + + ret = mali_c55_stats_dma_xfer(stats, src, dst, buf, + MALI_C55_1024BIN_HIST_SIZE, + mali_c55_stats_metering_complete); + if (ret) + goto err_fail_buffer; + + src = ctx->base + metering_space_addrs[cfg_space]; + dst += MALI_C55_1024BIN_HIST_SIZE; + + ret = mali_c55_stats_dma_xfer( + stats, src, dst, buf, + sizeof(struct mali_c55_stats_buffer) - MALI_C55_1024BIN_HIST_SIZE, + mali_c55_stats_metering_complete); + if (ret) { + dmaengine_terminate_sync(stats->channel); + goto err_fail_buffer; + } + + return; + +err_fail_buffer: + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); +} + +void mali_c55_unregister_stats(struct mali_c55 *mali_c55) +{ + struct mali_c55_stats *stats = &mali_c55->stats; + + if (!video_is_registered(&stats->vdev)) + return; + + vb2_video_unregister_device(&stats->vdev); + media_entity_cleanup(&stats->vdev.entity); + dma_release_channel(stats->channel); + mutex_destroy(&stats->lock); +} + +int mali_c55_register_stats(struct mali_c55 *mali_c55) +{ + struct mali_c55_stats *stats = &mali_c55->stats; + struct video_device *vdev = &stats->vdev; + struct vb2_queue *vb2q = &stats->queue; + dma_cap_mask_t mask; + int ret; + + mutex_init(&stats->lock); + INIT_LIST_HEAD(&stats->buffers.queue); + + dma_cap_zero(mask); + dma_cap_set(DMA_MEMCPY, mask); + + stats->channel = dma_request_channel(mask, 0, NULL); + if (!stats->channel) { + ret = -ENODEV; + goto err_destroy_mutex; + } + + stats->pad.flags = MEDIA_PAD_FL_SINK; + ret = media_entity_pads_init(&stats->vdev.entity, 1, &stats->pad); + if (ret) + goto err_release_dma_channel; + + vb2q->type = V4L2_BUF_TYPE_META_CAPTURE; + vb2q->io_modes = VB2_MMAP | VB2_DMABUF; + vb2q->drv_priv = stats; + vb2q->mem_ops = &vb2_dma_contig_memops; + vb2q->ops = &mali_c55_stats_vb2_ops; + vb2q->buf_struct_size = sizeof(struct mali_c55_stats_buf); + vb2q->min_queued_buffers = 1; + vb2q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + vb2q->lock = &stats->lock; + vb2q->dev = mali_c55->dev; + + ret = vb2_queue_init(vb2q); + if (ret) { + dev_err(mali_c55->dev, "stats vb2 queue init failed\n"); + goto err_cleanup_entity; + } + + strscpy(stats->vdev.name, "mali-c55 3a stats", sizeof(stats->vdev.name)); + vdev->release = video_device_release_empty; + vdev->fops = &mali_c55_stats_v4l2_fops; + vdev->ioctl_ops = &mali_c55_stats_v4l2_ioctl_ops; + vdev->lock = &stats->lock; + vdev->v4l2_dev = &mali_c55->v4l2_dev; + vdev->queue = &stats->queue; + vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING; + vdev->vfl_dir = VFL_DIR_RX; + video_set_drvdata(vdev, stats); + + ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1); + if (ret) { + dev_err(mali_c55->dev, + "failed to register stats video device\n"); + goto err_release_vb2q; + } + + stats->mali_c55 = mali_c55; + + return 0; + +err_release_vb2q: + vb2_queue_release(vb2q); +err_cleanup_entity: + media_entity_cleanup(&stats->vdev.entity); +err_release_dma_channel: + dma_release_channel(stats->channel); +err_destroy_mutex: + mutex_destroy(&stats->lock); + + return ret; +}