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Fri, 08 May 2026 09:17:44 -0700 (PDT) From: Arash Golgol To: linux-media@vger.kernel.org Cc: yong.deng@magewell.com, paulk@sys-base.io, mchehab@kernel.org, wens@kernel.org, jernej.skrabec@gmail.com, samuel@sholland.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, laurent.pinchart@ideasonboard.com, sakari.ailus@linux.intel.com, Arash Golgol Subject: [PATCH v2 3/3] media: sun6i-csi: capture: Support MC-centric format enumeration Date: Fri, 8 May 2026 19:47:21 +0330 Message-Id: <20260508161721.94285-4-arash.golgol@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260508161721.94285-1-arash.golgol@gmail.com> References: <20260508161721.94285-1-arash.golgol@gmail.com> Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Extend vidioc_enum_fmt to support MC-centric enumeration by filtering pixel formats based on the provided mbus code. Advertise MC I/O support on the video device to reflect its intended usage within a media graph. Signed-off-by: Arash Golgol Reviewed-by: Laurent Pinchart --- Changes in v2: - Return pixelformat directly instead of a pointer - Link to v1: https://patchwork.kernel.org/project/linux-media/patch/20260217064050.18388-4-arash.golgol@gmail.com/ .../sunxi/sun6i-csi/sun6i_csi_capture.c | 39 +++++++++++++++++-- 1 file changed, 36 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c index 375ea6745eed..2db96ee19d8b 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c @@ -327,6 +327,22 @@ static bool sun6i_csi_capture_format_match(u32 pixelformat, u32 mbus_code) return false; } +static u32 sun6i_csi_capture_pixelformat_find(u32 mbus_code) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(sun6i_csi_capture_format_matches); i++) { + const struct sun6i_csi_capture_format_match *match = + &sun6i_csi_capture_format_matches[i]; + + if (match->mbus_code == mbus_code) + return match->pixelformat; + } + + /* Valid fourcc is non-zero. */ + return 0; +} + /* Capture */ static void @@ -729,11 +745,27 @@ static int sun6i_csi_capture_enum_fmt(struct file *file, void *priv, struct v4l2_fmtdesc *fmtdesc) { u32 index = fmtdesc->index; + u32 mbus_code = fmtdesc->mbus_code; + u32 pixelformat; + + /* MC-centric or Video-node-centric */ + if (mbus_code) { + /* There is only one pixelformat for a mbus_code. */ + if (index) + return -EINVAL; + + pixelformat = sun6i_csi_capture_pixelformat_find(mbus_code); + } else { + if (index >= ARRAY_SIZE(sun6i_csi_capture_formats)) + return -EINVAL; + + pixelformat = sun6i_csi_capture_formats[index].pixelformat; + } - if (index >= ARRAY_SIZE(sun6i_csi_capture_formats)) + if (!pixelformat) return -EINVAL; - fmtdesc->pixelformat = sun6i_csi_capture_formats[index].pixelformat; + fmtdesc->pixelformat = pixelformat; return 0; } @@ -1065,7 +1097,8 @@ int sun6i_csi_capture_setup(struct sun6i_csi_device *csi_dev) strscpy(video_dev->name, SUN6I_CSI_CAPTURE_NAME, sizeof(video_dev->name)); - video_dev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; + video_dev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | + V4L2_CAP_IO_MC; video_dev->vfl_dir = VFL_DIR_RX; video_dev->release = video_device_release_empty; video_dev->fops = &sun6i_csi_capture_fops; -- 2.34.1