linux-kernel - [PATCH v5 10/20] media: rkvdec: h264: Fix bit depth wrap in pps packet

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Message-Id: <20220513202922.13846-11-nicolas.dufresne@collabora.com>
Date:   Fri, 13 May 2022 16:29:12 -0400
From:   Nicolas Dufresne <nicolas.dufresne@...labora.com>
To:     Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Boris Brezillon <boris.brezillon@...labora.com>
Cc:     nicolas@...fresne.ca, Jonas Karlman <jonas@...boo.se>,
        linux-media@...r.kernel.org,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: [PATCH v5 10/20] media: rkvdec: h264: Fix bit depth wrap in pps packet

From: Jonas Karlman <jonas@...boo.se>

The luma and chroma bit depth fields in the pps packet are 3 bits wide.
8 is wrongly added to the bit depth values written to these 3 bit fields.
Because only the 3 LSB are written, the hardware was configured
correctly.

Correct this by not adding 8 to the luma and chroma bit depth value.

Fixes: cd33c830448ba ("media: rkvdec: Add the rkvdec driver")
Signed-off-by: Jonas Karlman <jonas@...boo.se>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>
Reviewed-by: Ezequiel Garcia <ezequiel@...labora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
---
 drivers/staging/media/rkvdec/rkvdec-h264.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/media/rkvdec/rkvdec-h264.c b/drivers/staging/media/rkvdec/rkvdec-h264.c
index bcde37d72244..8d44a884a52e 100644
--- a/drivers/staging/media/rkvdec/rkvdec-h264.c
+++ b/drivers/staging/media/rkvdec/rkvdec-h264.c
@@ -662,8 +662,8 @@ static void assemble_hw_pps(struct rkvdec_ctx *ctx,
 	WRITE_PPS(0xff, PROFILE_IDC);
 	WRITE_PPS(1, CONSTRAINT_SET3_FLAG);
 	WRITE_PPS(sps->chroma_format_idc, CHROMA_FORMAT_IDC);
-	WRITE_PPS(sps->bit_depth_luma_minus8 + 8, BIT_DEPTH_LUMA);
-	WRITE_PPS(sps->bit_depth_chroma_minus8 + 8, BIT_DEPTH_CHROMA);
+	WRITE_PPS(sps->bit_depth_luma_minus8, BIT_DEPTH_LUMA);
+	WRITE_PPS(sps->bit_depth_chroma_minus8, BIT_DEPTH_CHROMA);
 	WRITE_PPS(0, QPPRIME_Y_ZERO_TRANSFORM_BYPASS_FLAG);
 	WRITE_PPS(sps->log2_max_frame_num_minus4, LOG2_MAX_FRAME_NUM_MINUS4);
 	WRITE_PPS(sps->max_num_ref_frames, MAX_NUM_REF_FRAMES);
-- 
2.34.3