From patchwork Wed Oct 2 19:35:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Jernej_=C5=A0krabec?= X-Patchwork-Id: 11171833 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 533DC1599 for ; Wed, 2 Oct 2019 19:36:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3B84D21A4C for ; Wed, 2 Oct 2019 19:36:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729048AbfJBTgH (ORCPT ); Wed, 2 Oct 2019 15:36:07 -0400 Received: from mailoutvs50.siol.net ([185.57.226.241]:42338 "EHLO mail.siol.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727594AbfJBTgG (ORCPT ); Wed, 2 Oct 2019 15:36:06 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.siol.net (Postfix) with ESMTP id 74B5A523B61; Wed, 2 Oct 2019 21:36:03 +0200 (CEST) X-Virus-Scanned: amavisd-new at psrvmta11.zcs-production.pri Received: from mail.siol.net ([127.0.0.1]) by localhost (psrvmta11.zcs-production.pri [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id 6VtHZmapx71V; Wed, 2 Oct 2019 21:36:02 +0200 (CEST) Received: from mail.siol.net (localhost [127.0.0.1]) by mail.siol.net (Postfix) with ESMTPS id CA2A5523B67; Wed, 2 Oct 2019 21:36:02 +0200 (CEST) Received: from localhost.localdomain (cpe-86-58-59-25.static.triera.net [86.58.59.25]) (Authenticated sender: 031275009) by mail.siol.net (Postfix) with ESMTPSA id 1F5D6523B61; Wed, 2 Oct 2019 21:36:00 +0200 (CEST) From: Jernej Skrabec To: mripard@kernel.org, paul.kocialkowski@bootlin.com Cc: mchehab@kernel.org, hverkuil-cisco@xs4all.nl, gregkh@linuxfoundation.org, wens@csie.org, linux-media@vger.kernel.org, devel@driverdev.osuosl.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/3] media: cedrus: Fix decoding for some H264 videos Date: Wed, 2 Oct 2019 21:35:51 +0200 Message-Id: <20191002193553.1633467-2-jernej.skrabec@siol.net> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191002193553.1633467-1-jernej.skrabec@siol.net> References: <20191002193553.1633467-1-jernej.skrabec@siol.net> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org It seems that for some H264 videos at least one bitstream parsing trigger must be called in order to be decoded correctly. There is no explanation why this helps, but it was observed that two sample videos with this fix are now decoded correctly and there is no regression with others. Signed-off-by: Jernej Skrabec Acked-by: Paul Kocialkowski --- .../staging/media/sunxi/cedrus/cedrus_h264.c | 30 +++++++++++++++++-- .../staging/media/sunxi/cedrus/cedrus_regs.h | 3 ++ 2 files changed, 30 insertions(+), 3 deletions(-) diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_h264.c b/drivers/staging/media/sunxi/cedrus/cedrus_h264.c index d6a782703c9b..bd848146eada 100644 --- a/drivers/staging/media/sunxi/cedrus/cedrus_h264.c +++ b/drivers/staging/media/sunxi/cedrus/cedrus_h264.c @@ -6,6 +6,7 @@ * Copyright (c) 2018 Bootlin */ +#include #include #include @@ -289,6 +290,28 @@ static void cedrus_write_pred_weight_table(struct cedrus_ctx *ctx, } } +/* + * It turns out that using VE_H264_VLD_OFFSET to skip bits is not reliable. In + * rare cases frame is not decoded correctly. However, setting offset to 0 and + * skipping appropriate amount of bits with flush bits trigger always works. + */ +static void cedrus_skip_bits(struct cedrus_dev *dev, int num) +{ + int count = 0; + + while (count < num) { + int tmp = min(num - count, 32); + + cedrus_write(dev, VE_H264_TRIGGER_TYPE, + VE_H264_TRIGGER_TYPE_FLUSH_BITS | + VE_H264_TRIGGER_TYPE_N_BITS(tmp)); + while (cedrus_read(dev, VE_H264_STATUS) & VE_H264_STATUS_VLD_BUSY) + udelay(1); + + count += tmp; + } +} + static void cedrus_set_params(struct cedrus_ctx *ctx, struct cedrus_run *run) { @@ -299,12 +322,11 @@ static void cedrus_set_params(struct cedrus_ctx *ctx, struct vb2_buffer *src_buf = &run->src->vb2_buf; struct cedrus_dev *dev = ctx->dev; dma_addr_t src_buf_addr; - u32 offset = slice->header_bit_size; - u32 len = (slice->size * 8) - offset; + u32 len = slice->size * 8; u32 reg; cedrus_write(dev, VE_H264_VLD_LEN, len); - cedrus_write(dev, VE_H264_VLD_OFFSET, offset); + cedrus_write(dev, VE_H264_VLD_OFFSET, 0); src_buf_addr = vb2_dma_contig_plane_dma_addr(src_buf, 0); cedrus_write(dev, VE_H264_VLD_END, @@ -323,6 +345,8 @@ static void cedrus_set_params(struct cedrus_ctx *ctx, cedrus_write(dev, VE_H264_TRIGGER_TYPE, VE_H264_TRIGGER_TYPE_INIT_SWDEC); + cedrus_skip_bits(dev, slice->header_bit_size); + if (((pps->flags & V4L2_H264_PPS_FLAG_WEIGHTED_PRED) && (slice->slice_type == V4L2_H264_SLICE_TYPE_P || slice->slice_type == V4L2_H264_SLICE_TYPE_SP)) || diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_regs.h b/drivers/staging/media/sunxi/cedrus/cedrus_regs.h index 3329f9aaf975..b52926a54025 100644 --- a/drivers/staging/media/sunxi/cedrus/cedrus_regs.h +++ b/drivers/staging/media/sunxi/cedrus/cedrus_regs.h @@ -538,13 +538,16 @@ VE_H264_CTRL_SLICE_DECODE_INT) #define VE_H264_TRIGGER_TYPE 0x224 +#define VE_H264_TRIGGER_TYPE_N_BITS(x) (((x) & 0x3f) << 8) #define VE_H264_TRIGGER_TYPE_AVC_SLICE_DECODE (8 << 0) #define VE_H264_TRIGGER_TYPE_INIT_SWDEC (7 << 0) +#define VE_H264_TRIGGER_TYPE_FLUSH_BITS (3 << 0) #define VE_H264_STATUS 0x228 #define VE_H264_STATUS_VLD_DATA_REQ_INT VE_H264_CTRL_VLD_DATA_REQ_INT #define VE_H264_STATUS_DECODE_ERR_INT VE_H264_CTRL_DECODE_ERR_INT #define VE_H264_STATUS_SLICE_DECODE_INT VE_H264_CTRL_SLICE_DECODE_INT +#define VE_H264_STATUS_VLD_BUSY BIT(8) #define VE_H264_STATUS_INT_MASK VE_H264_CTRL_INT_MASK