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Fri, 30 Jan 2026 04:50:01 -0800 (PST) Received: from xeon ([188.163.112.49]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-435e10e4757sm22738783f8f.5.2026.01.30.04.50.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Jan 2026 04:50:00 -0800 (PST) From: Svyatoslav Ryhel To: Thierry Reding , Mikko Perttunen , David Airlie , Simona Vetter , Jonathan Hunter , Sowjanya Komatineni , Luca Ceresoli , Mauro Carvalho Chehab , Greg Kroah-Hartman , Hans Verkuil , Svyatoslav Ryhel Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-media@vger.kernel.org, linux-staging@lists.linux.dev Subject: [PATCH v6 06/15] staging: media: tegra-video: vi: improve logic of source requesting Date: Fri, 30 Jan 2026 14:49:23 +0200 Message-ID: <20260130124932.351328-7-clamor95@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260130124932.351328-1-clamor95@gmail.com> References: <20260130124932.351328-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" By default tegra_channel_get_remote_csi_subdev returns next device in pipe assuming it is CSI but in case of Tegra20 and Tegra30 it can also be VIP or even HOST. Define tegra_channel_get_remote_csi_subdev within CSI and add check if returned device is actually CSI by comparing subdevice operations. Previous tegra_channel_get_remote_csi_subdev definition in VI rename to tegra_channel_get_remote_bridge_subdev and use it only in VI driver since core VI driver does not care about source and does not call any specific functions. Tested-by: Luca Ceresoli # tegra20, parallel ca= mera Signed-off-by: Svyatoslav Ryhel --- drivers/staging/media/tegra-video/csi.c | 16 ++++++++++++++++ drivers/staging/media/tegra-video/vi.c | 14 +++++++------- 2 files changed, 23 insertions(+), 7 deletions(-) diff --git a/drivers/staging/media/tegra-video/csi.c b/drivers/staging/medi= a/tegra-video/csi.c index 9fdc8ac1c754..38bff499a8e0 100644 --- a/drivers/staging/media/tegra-video/csi.c +++ b/drivers/staging/media/tegra-video/csi.c @@ -445,6 +445,22 @@ static const struct v4l2_subdev_ops tegra_csi_ops =3D { .pad =3D &tegra_csi_pad_ops, }; =20 +struct v4l2_subdev *tegra_channel_get_remote_csi_subdev(struct tegra_vi_ch= annel *chan) +{ + struct media_pad *pad; + struct v4l2_subdev *subdev; + + pad =3D media_pad_remote_pad_first(&chan->pad); + if (!pad) + return NULL; + + subdev =3D media_entity_to_v4l2_subdev(pad->entity); + if (!subdev) + return NULL; + + return subdev->ops =3D=3D &tegra_csi_ops ? subdev : NULL; +} + static int tegra_csi_channel_alloc(struct tegra_csi *csi, struct device_node *node, unsigned int port_num, unsigned int lanes, diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media= /tegra-video/vi.c index 0f98157a7e91..f0725312e236 100644 --- a/drivers/staging/media/tegra-video/vi.c +++ b/drivers/staging/media/tegra-video/vi.c @@ -160,8 +160,8 @@ static void tegra_channel_buffer_queue(struct vb2_buffe= r *vb) wake_up_interruptible(&chan->start_wait); } =20 -struct v4l2_subdev * -tegra_channel_get_remote_csi_subdev(struct tegra_vi_channel *chan) +static struct v4l2_subdev * +tegra_channel_get_remote_bridge_subdev(struct tegra_vi_channel *chan) { struct media_pad *pad; =20 @@ -182,7 +182,7 @@ tegra_channel_get_remote_source_subdev(struct tegra_vi_= channel *chan) struct v4l2_subdev *subdev; struct media_entity *entity; =20 - subdev =3D tegra_channel_get_remote_csi_subdev(chan); + subdev =3D tegra_channel_get_remote_bridge_subdev(chan); if (!subdev) return NULL; =20 @@ -204,7 +204,7 @@ static int tegra_channel_enable_stream(struct tegra_vi_= channel *chan) struct v4l2_subdev *subdev; int ret; =20 - subdev =3D tegra_channel_get_remote_csi_subdev(chan); + subdev =3D tegra_channel_get_remote_bridge_subdev(chan); ret =3D v4l2_subdev_call(subdev, video, s_stream, true); if (ret < 0 && ret !=3D -ENOIOCTLCMD) return ret; @@ -217,7 +217,7 @@ static int tegra_channel_disable_stream(struct tegra_vi= _channel *chan) struct v4l2_subdev *subdev; int ret; =20 - subdev =3D tegra_channel_get_remote_csi_subdev(chan); + subdev =3D tegra_channel_get_remote_bridge_subdev(chan); ret =3D v4l2_subdev_call(subdev, video, s_stream, false); if (ret < 0 && ret !=3D -ENOIOCTLCMD) return ret; @@ -1631,11 +1631,11 @@ static int tegra_vi_graph_notify_complete(struct v4= l2_async_notifier *notifier) goto unregister_video; } =20 - subdev =3D tegra_channel_get_remote_csi_subdev(chan); + subdev =3D tegra_channel_get_remote_bridge_subdev(chan); if (!subdev) { ret =3D -ENODEV; dev_err(vi->dev, - "failed to get remote csi subdev: %d\n", ret); + "failed to get remote bridge subdev: %d\n", ret); goto unregister_video; } =20 --=20 2.51.0