From patchwork Tue Aug 31 18:51:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Michel Hautbois X-Patchwork-Id: 12467669 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EBBE8C432BE for ; Tue, 31 Aug 2021 18:51:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D1C5861075 for ; Tue, 31 Aug 2021 18:51:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239210AbhHaSws (ORCPT ); Tue, 31 Aug 2021 14:52:48 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:57974 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229946AbhHaSws (ORCPT ); Tue, 31 Aug 2021 14:52:48 -0400 Received: from tatooine.ideasonboard.com (unknown [IPv6:2a01:e0a:169:7140:b904:a32:6762:6e37]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 1921524F; Tue, 31 Aug 2021 20:51:51 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1630435911; bh=MTpHPcv7BpJs9Hw6l+l851YdSllFKlcRtf1S4bEHtvI=; h=From:To:Cc:Subject:Date:From; b=VXGn2YtNt+lyM/TLI2L4dj8KQ9JRckzfqnWmbeWRTnJIbOutLhjQRNyIheh29zCAf UZIkQEzicP9hio4RuorPRQaRZ5hAbhNmDj0y763pGOiBDWgApYxzRmBT8UHi30Qycl D1eWVXAw3atoA43o47erWpVzxV5ojHoH4hd075s0= From: Jean-Michel Hautbois To: linux-media@vger.kernel.org Cc: sakari.ailus@linux.intel.com, bingbu.cao@intel.com, laurent.pinchart@ideasonboard.com, Jean-Michel Hautbois Subject: [RFC PATCH] media: staging: ipu3-imgu: add the AWB memory layout Date: Tue, 31 Aug 2021 20:51:40 +0200 Message-Id: <20210831185140.77400-1-jeanmichel.hautbois@ideasonboard.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org While parsing the RAW AWB metadata, the AWB layout was missing to fully understand which byte corresponds to which feature. Make the field names and usage explicit, as it is used by the userspace applications. Signed-off-by: Jean-Michel Hautbois --- This structure layout is defined in CrOs: https://chromium.googlesource.com/chromiumos/platform/arc-camera/+/refs/heads/master/hal/intel/include/ia_imaging/awb_public.h There are a few things not really understood right now: - Is sat_ratio a full scale ratio (I can't get more than some values out of it, is it a ratio of 25%, 50%, 75%, 100% ?) - What are the real minimum and maximum values for the grid size ? From CrOs it appears to be [16, 80] for width and [16, 60] for height while in this file it seems to be [16, 160] for width and not really defined for height AFAICT ? - Same for the block_width_log2 and block_height_log2 which are [3, 7] in this file and [3, 6] in the awb_public.h header ? .../media/ipu3/include/uapi/intel-ipu3.h | 38 ++++++++++++++----- 1 file changed, 29 insertions(+), 9 deletions(-) diff --git a/drivers/staging/media/ipu3/include/uapi/intel-ipu3.h b/drivers/staging/media/ipu3/include/uapi/intel-ipu3.h index fa3d6ee5adf2..83191aff2ddd 100644 --- a/drivers/staging/media/ipu3/include/uapi/intel-ipu3.h +++ b/drivers/staging/media/ipu3/include/uapi/intel-ipu3.h @@ -61,20 +61,40 @@ struct ipu3_uapi_grid_config { __u16 y_end; } __packed; +/** + * struct ipu3_uapi_awb_raw_buffer - Memory layout for each cell in AWB + * + * @Gr_avg: Green average for red lines in the cell. + * @R_avg: Red average in the cell. + * @B_avg: Blue average in the cell. + * @Gb_avg: Green average for blue lines in the cell. + * @sat_ratio: Saturation ratio in the cell. + * @padding0: Unused byte for padding. + * @padding1: Unused byte for padding. + * @padding2: Unused byte for padding. + */ +struct ipu3_uapi_awb_raw_buffer { + unsigned char Gr_avg; + unsigned char R_avg; + unsigned char B_avg; + unsigned char Gb_avg; + unsigned char sat_ratio; + unsigned char padding0; + unsigned char padding1; + unsigned char padding2; +} __packed; + /* * The grid based data is divided into "slices" called set, each slice of setX * refers to ipu3_uapi_grid_config width * height_per_slice. */ #define IPU3_UAPI_AWB_MAX_SETS 60 -/* Based on grid size 80 * 60 and cell size 16 x 16 */ -#define IPU3_UAPI_AWB_SET_SIZE 1280 -#define IPU3_UAPI_AWB_MD_ITEM_SIZE 8 -#define IPU3_UAPI_AWB_SPARE_FOR_BUBBLES \ - (IPU3_UAPI_MAX_BUBBLE_SIZE * IPU3_UAPI_MAX_STRIPES * \ - IPU3_UAPI_AWB_MD_ITEM_SIZE) +#define AWB_PUBLIC_NUM_OF_ITEMS_IN_SET 160 +/* Based on max grid height + Spare for bubbles */ +#define AWB_PUBLIC_NUM_OF_SETS_IN_BUFFER IPU3_UAPI_AWB_MAX_SETS + \ + (IPU3_UAPI_MAX_BUBBLE_SIZE * IPU3_UAPI_MAX_STRIPES) #define IPU3_UAPI_AWB_MAX_BUFFER_SIZE \ - (IPU3_UAPI_AWB_MAX_SETS * \ - (IPU3_UAPI_AWB_SET_SIZE + IPU3_UAPI_AWB_SPARE_FOR_BUBBLES)) + AWB_PUBLIC_NUM_OF_SETS_IN_BUFFER * AWB_PUBLIC_NUM_OF_ITEMS_IN_SET /** * struct ipu3_uapi_awb_raw_buffer - AWB raw buffer @@ -83,7 +103,7 @@ struct ipu3_uapi_grid_config { * the average values for each color channel. */ struct ipu3_uapi_awb_raw_buffer { - __u8 meta_data[IPU3_UAPI_AWB_MAX_BUFFER_SIZE] + struct ipu3_uapi_awb_raw_buffer meta_data[IPU3_UAPI_AWB_MAX_BUFFER_SIZE] __attribute__((aligned(32))); } __packed;