linux-kernel - Re: [PATCH v1 8/9] media: qcom: camss: Fix set CSI2_RX_CFG1_VC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5c917927-92ed-4139-a69f-95761ec63c83@linaro.org>
Date:   Tue, 22 Aug 2023 18:32:54 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bryan O'Donoghue <bryan.odonoghue@...aro.org>, rfoss@...nel.org,
        todor.too@...il.com, agross@...nel.org, andersson@...nel.org,
        mchehab@...nel.org, hverkuil-cisco@...all.nl,
        laurent.pinchart@...asonboard.com, sakari.ailus@...ux.intel.com,
        andrey.konovalov@...aro.org
Cc:     linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH v1 8/9] media: qcom: camss: Fix set CSI2_RX_CFG1_VC_MODE
 when VC is greater than 3

On 22.08.2023 18:16, Bryan O'Donoghue wrote:
> VC_MODE = 0 implies a two bit VC address.
> VC_MODE = 1 is required for VCs with a larger address than two bits.
> 
> Fixes: eebe6d00e9bf ("media: camss: Add support for CSID hardware version Titan 170")
> Cc: stable@...r.kernel.org
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
> ---
>  drivers/media/platform/qcom/camss/camss-csid-gen2.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/media/platform/qcom/camss/camss-csid-gen2.c b/drivers/media/platform/qcom/camss/camss-csid-gen2.c
> index 45c7986d4a8d0..140c584bfb8b1 100644
> --- a/drivers/media/platform/qcom/camss/camss-csid-gen2.c
> +++ b/drivers/media/platform/qcom/camss/camss-csid-gen2.c
> @@ -449,6 +449,8 @@ static void __csid_configure_stream(struct csid_device *csid, u8 enable, u8 vc)
>  	writel_relaxed(val, csid->base + CSID_CSI2_RX_CFG0);
>  
>  	val = 1 << CSI2_RX_CFG1_PACKET_ECC_CORRECTION_EN;
> +	if (vc > 3)
I hope you don't pull your hair out, but I think GENMASK(1,0) could be
in order here with a comment about the bitlength requirements

Konrad
> +		val |= 1 << CSI2_RX_CFG1_VC_MODE;
>  	val |= 1 << CSI2_RX_CFG1_MISR_EN;
>  	writel_relaxed(val, csid->base + CSID_CSI2_RX_CFG1);
>