linux-kernel - Re: [PATCH 05/17] media: camss: csid-170: don't enable unused irqs

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Message-ID: <CAG3jFytS-SBsgPTwN5Uzn=g9k_o-+ifyN7aPrzTvY1nb_csptA@mail.gmail.com>
Date:   Thu, 20 May 2021 12:39:33 +0200
From:   Robert Foss <robert.foss@...aro.org>
To:     Jonathan Marek <jonathan@...ek.ca>
Cc:     MSM <linux-arm-msm@...r.kernel.org>,
        Andrey Konovalov <andrey.konovalov@...aro.org>,
        Todor Tomov <todor.too@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        "open list:QUALCOMM CAMERA SUBSYSTEM DRIVER" 
        <linux-media@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 05/17] media: camss: csid-170: don't enable unused irqs

On Tue, 11 May 2021 at 20:08, Jonathan Marek <jonathan@...ek.ca> wrote:
>
> csid_isr() only checks for the reset irq, so enabling any other irqs
> doesn't make sense. The "RDI irq" comment is also wrong, the register
> should be CSID_CSI2_RDIN_IRQ_MASK. Without this fix there may be an
> excessive amount of irqs.
>
> Fixes: eebe6d00e9bf ("media: camss: Add support for CSID hardware version Titan 170")
> Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
> ---
>  drivers/media/platform/qcom/camss/camss-csid-170.c | 6 ------
>  1 file changed, 6 deletions(-)
>
> diff --git a/drivers/media/platform/qcom/camss/camss-csid-170.c b/drivers/media/platform/qcom/camss/camss-csid-170.c
> index a81cc94c075f..2bc695819919 100644
> --- a/drivers/media/platform/qcom/camss/camss-csid-170.c
> +++ b/drivers/media/platform/qcom/camss/camss-csid-170.c
> @@ -443,12 +443,6 @@ static void csid_configure_stream(struct csid_device *csid, u8 enable)
>         val |= 1 << CSI2_RX_CFG1_MISR_EN;
>         writel_relaxed(val, csid->base + CSID_CSI2_RX_CFG1); // csi2_vc_mode_shift_val ?
>
> -       /* error irqs start at BIT(11) */
> -       writel_relaxed(~0u, csid->base + CSID_CSI2_RX_IRQ_MASK);
> -
> -       /* RDI irq */
> -       writel_relaxed(~0u, csid->base + CSID_TOP_IRQ_MASK);
> -
>         val = 1 << RDI_CTRL_HALT_CMD;
>         writel_relaxed(val, csid->base + CSID_RDI_CTRL(0));
>  }

Reviewed-by: Robert Foss <robert.foss@...aro.org>