linux-kernel - Re: [PATCH v2 07/29] venus: hfi_venus: add halt AXI support for Venus 4xx

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Date:   Fri, 18 May 2018 23:23:25 +0900
From:   Tomasz Figa <tfiga@...gle.com>
To:     Stanimir Varbanov <stanimir.varbanov@...aro.org>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        vgarodia@...eaurora.org
Subject: Re: [PATCH v2 07/29] venus: hfi_venus: add halt AXI support for Venus 4xx

On Tue, May 15, 2018 at 5:12 PM Stanimir Varbanov <
stanimir.varbanov@...aro.org> wrote:

> Add AXI halt support for version 4xx by using venus wrapper
> registers.

> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
> ---
>   drivers/media/platform/qcom/venus/hfi_venus.c | 17 +++++++++++++++++
>   1 file changed, 17 insertions(+)

> diff --git a/drivers/media/platform/qcom/venus/hfi_venus.c
b/drivers/media/platform/qcom/venus/hfi_venus.c
> index 734ce11b0ed0..53546174aab8 100644
> --- a/drivers/media/platform/qcom/venus/hfi_venus.c
> +++ b/drivers/media/platform/qcom/venus/hfi_venus.c
> @@ -532,6 +532,23 @@ static int venus_halt_axi(struct venus_hfi_device
*hdev)
>          u32 val;
>          int ret;

> +       if (hdev->core->res->hfi_version == HFI_VERSION_4XX) {
> +               val = venus_readl(hdev, WRAPPER_CPU_AXI_HALT);
> +               val |= BIT(16);

Can we have the bit defined?

> +               venus_writel(hdev, WRAPPER_CPU_AXI_HALT, val);
> +
> +               ret = readl_poll_timeout(base +
WRAPPER_CPU_AXI_HALT_STATUS,
> +                                        val, val & BIT(24),

Ditto.

Best regards,
Tomasz