From patchwork Thu Sep 14 15:06:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Dufresne X-Patchwork-Id: 94718 X-Patchwork-Delegate: hverkuil@xs4all.nl Received: from vger.kernel.org ([23.128.96.18]) by www.linuxtv.org with esmtp (Exim 4.92) (envelope-from ) id 1qgnwl-004hgk-0n; Thu, 14 Sep 2023 15:07:59 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240876AbjINPIB (ORCPT + 1 other); Thu, 14 Sep 2023 11:08:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43222 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240773AbjINPH5 (ORCPT ); Thu, 14 Sep 2023 11:07:57 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4E43A1FC2; Thu, 14 Sep 2023 08:07:47 -0700 (PDT) Received: from whitebuilder.lan (unknown [IPv6:2606:6d00:15:bae9::c73]) (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: nicolas) by madras.collabora.co.uk (Postfix) with ESMTPSA id 91CFF6607346; Thu, 14 Sep 2023 16:07:45 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1694704066; bh=BJuuCTccNm1wBpGqGQgbWiAbPnhCietftX460WOqvPg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cnsYCWbf3pb1Gpp1Vxj5TDJOdfpaZC4yAUDTBm740nba91i/CYena1dpS4uYjA+mn MZceFljVTGR0RLT+94d7ruPsQaiF/q08r6kP8FX2XkVr9DlB7bM0fMtg2OSLef+z7i IGPlwgVXg0WOFot/QduWvs9TvhDKKjleZmo1XG8r2pjHNEg1h6u+j1buBYFaRQP520 bapyYSfKYFOpioCV660wApIcB9qcuFKQSgKWgRSv3Z/TCt7Dv+GD093kL6TvtfSmnB v3qw7k7KlYzQzsYNtZLhI+bI2cGbqHTrfvjNLxaKKA4zBW5zWHlLw13dtUvqUXnO76 TQycxNNBvnvYQ== From: Nicolas Dufresne To: Mauro Carvalho Chehab Cc: kernel@collabora.com, Nicolas Dufresne , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 5/5] docs: uapi: media: Document Mediatek 10bit tiled formats Date: Thu, 14 Sep 2023 11:06:51 -0400 Message-Id: <20230914150651.3114134-6-nicolas.dufresne@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230914150651.3114134-1-nicolas.dufresne@collabora.com> References: <20230914150651.3114134-1-nicolas.dufresne@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-LSpam-Score: -2.5 (--) X-LSpam-Report: No, score=-2.5 required=5.0 tests=BAYES_00=-1.9,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1 autolearn=ham autolearn_force=no Document V4L2_PIX_FMT_MT2110T and V4L2_PIX_FMT_MT2110R. These two formats are nearly identical, reusing MM21 format and expending it by inserting chunk of 16 bytes of lower 2 bit pixel data after each chunk of 64 bytes higher 8 bit of data. Signed-off-by: Nicolas Dufresne --- .../media/v4l/pixfmt-reserved.rst | 13 -- .../media/v4l/pixfmt-yuv-planar.rst | 129 ++++++++++++++++++ 2 files changed, 129 insertions(+), 13 deletions(-) diff --git a/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst b/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst index 296ad2025e8d3..58f6ae25b2e7d 100644 --- a/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst +++ b/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst @@ -275,19 +275,6 @@ please make a proposal on the linux-media mailing list. Decoder's implementation can be found here, `aspeed_codec `__ - * .. _V4L2-PIX-FMT-MT2110T: - - - ``V4L2_PIX_FMT_MT2110T`` - - 'MT2110T' - - This format is two-planar 10-Bit tile mode and having similitude with - ``V4L2_PIX_FMT_MM21`` in term of alignment and tiling. Used for VP9, AV1 - and HEVC. - * .. _V4L2-PIX-FMT-MT2110R: - - - ``V4L2_PIX_FMT_MT2110R`` - - 'MT2110R' - - This format is two-planar 10-Bit raster mode and having similitude with - ``V4L2_PIX_FMT_MM21`` in term of alignment and tiling. Used for AVC. .. raw:: latex \normalsize diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst index 2f0e0c97870b2..e37fe1d6cf166 100644 --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst @@ -144,6 +144,20 @@ All components are stored with the same number of bits per component. - Cb, Cr - Yes - 4x4 tiles + * - V4L2_PIX_FMT_MT2110T + - 'MT2T' + - 15 + - 4:2:0 + - Cb, Cr + - No + - 16x32 / 16x16 tiles tiled low bits + * - V4L2_PIX_FMT_MT2110R + - 'MT2R' + - 15 + - 4:2:0 + - Cb, Cr + - No + - 16x32 / 16x16 tiles raster low bits * - V4L2_PIX_FMT_NV16 - 'NV16' - 8 @@ -369,6 +383,8 @@ two non-contiguous planes. .. _V4L2-PIX-FMT-NV15-4L4: .. _V4L2-PIX-FMT-NV12M-10BE-8L128: .. _V4L2-PIX-FMT-NV12-10BE-8L128: +.. _V4L2-PIX-FMT-MT2110T: +.. _V4L2-PIX-FMT-MT2110R: Tiled NV15 ---------- @@ -514,6 +530,119 @@ be in different tiles. ``V4L2_PIX_FMT_NV12_10BE_8L128`` is similar to ``V4L2_PIX_FMT_NV12M_10BE_8L128`` but stores two planes in one memory. +``V4L2_PIX_FMT_MT2110T`` is one of Mediatek packed 10bit YUV 4:2:0 formats. +It is fully packed 10bit 4:2:0 format like NV15 (15 bits per pixel), except +that the lower two bits data is stored in separate partitions. The format is +composed of 16x32 luma tiles, and 16x16 chroma tiles. Each tiles is 640 bytes +long, divided into 8 partitions of 80 bytes. The first 16 bytes of the +partition represent the 2 least significant bits of pixel data. The remaining +64 bytes represent the 8 most significant bits of pixel data. + +.. kernel-figure:: mt2110t.svg + :alt: mt2110t.svg + :align: center + + Layout of MT2110T Chroma Tile + +Filtering out the upper part of each partitions results in a valid +``V4L2_PIX_FMT_MM21`` frame. A partition is a sub-tile of size 16 x 4. The +lower two bits is said to be tiled since each bytes contains the lower two +bits of the column of for pixel matching the same index. The chroma tiles +only have 4 partitions. + +.. flat-table:: MT2110T LSB bits layout + :header-rows: 1 + :stub-columns: 1 + + * - + - start + 0: + - start + 1: + - . . . + - start\ +\ 15: + * - Bits 1:0 + - Y'\ :sub:`0:0` + - Y'\ :sub:`0:1` + - . . . + - Y'\ :sub:`0:15` + * - Bit 3:2 + - Y'\ :sub:`1:0` + - Y'\ :sub:`1:1` + - . . . + - Y'\ :sub:`1:15` + * - Bits 5:4 + - Y'\ :sub:`2:0` + - Y'\ :sub:`2:1` + - . . . + - Y'\ :sub:`2:15` + * - Bits 7:6 + - Y'\ :sub:`3:0` + - Y'\ :sub:`3:1` + - . . . + - Y'\ :sub:`3:15` + +``V4L2_PIX_FMT_MT2110R`` is identical to ``V4L2_PIX_FMT_MT2110T`` except that +the least significant two bits layout is in raster order. This means the first byte +contains 4 pixels of the first row, with 4 bytes per line. + +.. flat-table:: MT2110R LSB bits layout + :header-rows: 2 + :stub-columns: 1 + + * - + - :cspan:`3` Byte 0 + - ... + - :cspan:`3` Byte 3 + * - + - 7:6 + - 5:4 + - 3:2 + - 1:0 + - ... + - 7:6 + - 5:4 + - 3:2 + - 1:0 + * - start + 0: + - Y'\ :sub:`0:3` + - Y'\ :sub:`0:2` + - Y'\ :sub:`0:1` + - Y'\ :sub:`0:0` + - ... + - Y'\ :sub:`0:15` + - Y'\ :sub:`0:14` + - Y'\ :sub:`0:13` + - Y'\ :sub:`0:12` + * - start + 4: + - Y'\ :sub:`1:3` + - Y'\ :sub:`1:2` + - Y'\ :sub:`1:1` + - Y'\ :sub:`1:0` + - ... + - Y'\ :sub:`1:15` + - Y'\ :sub:`1:14` + - Y'\ :sub:`1:13` + - Y'\ :sub:`1:12` + * - start + 8: + - Y'\ :sub:`2:3` + - Y'\ :sub:`2:2` + - Y'\ :sub:`2:1` + - Y'\ :sub:`2:0` + - ... + - Y'\ :sub:`2:15` + - Y'\ :sub:`2:14` + - Y'\ :sub:`2:13` + - Y'\ :sub:`2:12` + * - start\ +\ 12: + - Y'\ :sub:`3:3` + - Y'\ :sub:`3:2` + - Y'\ :sub:`3:1` + - Y'\ :sub:`3:0` + - ... + - Y'\ :sub:`3:15` + - Y'\ :sub:`3:14` + - Y'\ :sub:`3:13` + - Y'\ :sub:`3:12` + .. _V4L2-PIX-FMT-NV16: .. _V4L2-PIX-FMT-NV61: