linux-kernel - Re: [RFC 3/6] media: verisilicon: Improve constant's name

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Message-ID: <0b16a22f-9d23-41d4-a106-a5a20b3f52c5@collabora.com>
Date:   Fri, 17 Nov 2023 09:44:15 +0100
From:   Andrzej Pietrasiewicz <andrzej.p@...labora.com>
To:     Chen-Yu Tsai <wenst@...omium.org>
Cc:     linux-media@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com,
        Hugues Fruchet <hugues.fruchet@...s.st.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Daniel Almeida <daniel.almeida@...labora.com>,
        Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        Philipp Zabel <p.zabel@...gutronix.de>, kernel@...labora.com
Subject: Re: [RFC 3/6] media: verisilicon: Improve constant's name

Hi,

Thanks for looking at it.

W dniu 17.11.2023 o 07:11, Chen-Yu Tsai pisze:
> On Thu, Nov 16, 2023 at 11:48 PM Andrzej Pietrasiewicz
> <andrzej.p@...labora.com> wrote:
>>
>> For VP8 BIT(18) of this register is for enabling the boolean encoder.
> 
> Yes, but for H.264 it selects the entropy coding mode, 0 for CAVLC
> and 1 for CABAC. You even add it back in the last patch. I'd do it
> here, so you disambiguate the definition within one patch.
> 

The rationale behind doing what I did is this:

At this moment the H1 H.264 encoder is non-existent in the kernel,
so why would we keep H.264-related definitions? I re-introduce it
when the encoder appears.

That said, other H.264-specific constants do exist at this moment anyway.
So I'm fine with either approach.

Andrzej

> ChenYu
> 
> 
>> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@...labora.com>
>> ---
>>   drivers/media/platform/verisilicon/hantro_h1_regs.h    | 2 +-
>>   drivers/media/platform/verisilicon/hantro_h1_vp8_enc.c | 2 +-
>>   2 files changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/media/platform/verisilicon/hantro_h1_regs.h b/drivers/media/platform/verisilicon/hantro_h1_regs.h
>> index 7752d1291c0e..c1c66c934a24 100644
>> --- a/drivers/media/platform/verisilicon/hantro_h1_regs.h
>> +++ b/drivers/media/platform/verisilicon/hantro_h1_regs.h
>> @@ -70,7 +70,7 @@
>>   #define    H1_REG_ENC_CTRL2_DISABLE_QUARTER_PIXMV      BIT(22)
>>   #define    H1_REG_ENC_CTRL2_TRANS8X8_MODE_EN           BIT(21)
>>   #define    H1_REG_ENC_CTRL2_CABAC_INIT_IDC(x)          ((x) << 19)
>> -#define    H1_REG_ENC_CTRL2_ENTROPY_CODING_MODE                BIT(18)
>> +#define    H1_REG_ENC_CTRL2_VP8_BOOLENC_ENABLE         BIT(18)
>>   #define    H1_REG_ENC_CTRL2_H264_INTER4X4_MODE         BIT(17)
>>   #define    H1_REG_ENC_CTRL2_H264_STREAM_MODE           BIT(16)
>>   #define    H1_REG_ENC_CTRL2_INTRA16X16_MODE(x)         ((x))
>> diff --git a/drivers/media/platform/verisilicon/hantro_h1_vp8_enc.c b/drivers/media/platform/verisilicon/hantro_h1_vp8_enc.c
>> index 05aa0dd9c09c..08c5079fbfd0 100644
>> --- a/drivers/media/platform/verisilicon/hantro_h1_vp8_enc.c
>> +++ b/drivers/media/platform/verisilicon/hantro_h1_vp8_enc.c
>> @@ -1226,7 +1226,7 @@ static void hantro_h1_vp8_enc_set_params(struct hantro_dev *vpu, struct hantro_c
>>          reg = 0;
>>          if (mb_width * mb_height > MAX_MB_COUNT_TO_DISABLE_QUARTER_PIXEL_MV)
>>                  reg = H1_REG_ENC_CTRL2_DISABLE_QUARTER_PIXMV;
>> -       reg |= H1_REG_ENC_CTRL2_ENTROPY_CODING_MODE;
>> +       reg |= H1_REG_ENC_CTRL2_VP8_BOOLENC_ENABLE;
>>
>>          inter_favor = 128 - ctx->vp8_enc.prob_intra;
>>          if (inter_favor >= 0)
>> --
>> 2.25.1
>>
>>
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