From patchwork Thu Jan 11 16:07:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 762351 Received: from madrid.collaboradmins.com (madrid.collaboradmins.com [46.235.227.194]) (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 AD68550241; Thu, 11 Jan 2024 16:07:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="Pfzq54u1" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1704989248; bh=4Ntkv53/ay1b9IY+9lgJ2+STZE4g9vhrLr7e58YkCSw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Pfzq54u1c66toyzrg6Ae0/4xekI4QbiTFLBxcwK1U1zUVQyLlF0N4LA2MfFZ9qevQ c5YbXpgf1HHmoWDMXAe/5TYTmga088smayHf5geKOHJgliMJK9bcVaAdFViPQegpqE VtqNygrjEhu8QHVvOruLKp1XcF4LCBb6lpFlaGREt8GabhIiNIzKFjXmBy1UvgUCrU 3tazA6pEhOl/2BSs92cX7oxBkOR+OEu50J4ve6OGcLrqylhNFSD0E5ZqoOJIxJ+FZo b2w89CdMxwkX/vjRJjDqpha7k89+GQGTW2wu3hs+uxaxtFQAlbp99xaR5SfwxcL6IW n7aTJbucp/SKg== Received: from benjamin-XPS-13-9310.. (cola.collaboradmins.com [195.201.22.229]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: benjamin.gaignard) by madrid.collaboradmins.com (Postfix) with ESMTPSA id 944693782011; Thu, 11 Jan 2024 16:07:27 +0000 (UTC) From: Benjamin Gaignard To: mchehab@kernel.org, p.zabel@pengutronix.de, hverkuil-cisco@xs4all.nl, nicolas.dufresne@collabora.com Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, kernel@collabora.com, Benjamin Gaignard Subject: [RCF 1/2] media: videodev2: Add V4L2_FMT_FLAG_ALL_FORMATS flag Date: Thu, 11 Jan 2024 17:07:20 +0100 Message-Id: <20240111160721.50020-2-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240111160721.50020-1-benjamin.gaignard@collabora.com> References: <20240111160721.50020-1-benjamin.gaignard@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add new flag to allow enumerate all pixels formats when calling VIDIOC_ENUM_FMT ioctl. When this flag is set drivers must ignore the configuration and return the hardware supported pixel formats for the specified queue. This will permit to discover which pixels formats are supported without setting codec-specific information so userland can more easily knows if the driver suit well to what it needs. The main target are stateless decoders so update the documentation about how use this flag. Signed-off-by: Benjamin Gaignard --- .../userspace-api/media/v4l/dev-stateless-decoder.rst | 3 +++ Documentation/userspace-api/media/v4l/vidioc-enum-fmt.rst | 4 ++++ Documentation/userspace-api/media/videodev2.h.rst.exceptions | 1 + drivers/media/v4l2-core/v4l2-ioctl.c | 2 +- include/uapi/linux/videodev2.h | 1 + 5 files changed, 10 insertions(+), 1 deletion(-) diff --git a/Documentation/userspace-api/media/v4l/dev-stateless-decoder.rst b/Documentation/userspace-api/media/v4l/dev-stateless-decoder.rst index 35ed05f2695e..b7b650f1a18f 100644 --- a/Documentation/userspace-api/media/v4l/dev-stateless-decoder.rst +++ b/Documentation/userspace-api/media/v4l/dev-stateless-decoder.rst @@ -58,6 +58,9 @@ Querying capabilities default values for these controls being used, and a returned set of formats that may not be usable for the media the client is trying to decode. + * If ``V4L2_FMT_FLAG_ALL_FORMATS`` flag is set the driver must enumerate + all the supported formats without taking care of codec-dependent controls. + 3. The client may use :c:func:`VIDIOC_ENUM_FRAMESIZES` to detect supported resolutions for a given format, passing desired pixel format in :c:type:`v4l2_frmsizeenum`'s ``pixel_format``. diff --git a/Documentation/userspace-api/media/v4l/vidioc-enum-fmt.rst b/Documentation/userspace-api/media/v4l/vidioc-enum-fmt.rst index 000c154b0f98..db8bc8e29a91 100644 --- a/Documentation/userspace-api/media/v4l/vidioc-enum-fmt.rst +++ b/Documentation/userspace-api/media/v4l/vidioc-enum-fmt.rst @@ -227,6 +227,10 @@ the ``mbus_code`` field is handled differently: The application can ask to configure the quantization of the capture device when calling the :ref:`VIDIOC_S_FMT ` ioctl with :ref:`V4L2_PIX_FMT_FLAG_SET_CSC ` set. + * - ``V4L2_FMT_FLAG_ALL_FORMATS`` + - 0x0200 + - Set by userland application to enumerate all possible pixels formats + without taking care of the current configuration. Return Value ============ diff --git a/Documentation/userspace-api/media/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions index 3e58aac4ef0b..42d9075b7fc2 100644 --- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions +++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions @@ -215,6 +215,7 @@ replace define V4L2_FMT_FLAG_CSC_XFER_FUNC fmtdesc-flags replace define V4L2_FMT_FLAG_CSC_YCBCR_ENC fmtdesc-flags replace define V4L2_FMT_FLAG_CSC_HSV_ENC fmtdesc-flags replace define V4L2_FMT_FLAG_CSC_QUANTIZATION fmtdesc-flags +replace define V4L2_FMT_FLAG_ALL_FORMATS fmtdesc-flags # V4L2 timecode types replace define V4L2_TC_TYPE_24FPS timecode-type diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 33076af4dfdb..22a93d074a5b 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1544,7 +1544,7 @@ static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, p->mbus_code = 0; mbus_code = p->mbus_code; - memset_after(p, 0, type); + memset_after(p, 0, flags); p->mbus_code = mbus_code; switch (p->type) { diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 68e7ac178cc2..82d8c8a7fb7f 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -869,6 +869,7 @@ struct v4l2_fmtdesc { #define V4L2_FMT_FLAG_CSC_YCBCR_ENC 0x0080 #define V4L2_FMT_FLAG_CSC_HSV_ENC V4L2_FMT_FLAG_CSC_YCBCR_ENC #define V4L2_FMT_FLAG_CSC_QUANTIZATION 0x0100 +#define V4L2_FMT_FLAG_ALL_FORMATS 0x0200 /* Frame Size and frame rate enumeration */ /*