linux-kernel - Re: [PATCH] venus: fix calculating mbps in calculate_inst

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Date:   Mon, 9 Nov 2020 10:31:53 -0800
From:   Fritz Koenig <frkoenig@...omium.org>
To:     Mansur Alisha Shaik <mansur@...eaurora.org>
Cc:     linux-media@...r.kernel.org,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Vikash Garodia <vgarodia@...eaurora.org>
Subject: Re: [PATCH] venus: fix calculating mbps in calculate_inst_freq()

On Mon, Nov 2, 2020 at 2:25 AM Mansur Alisha Shaik
<mansur@...eaurora.org> wrote:
>
> Currently in calculate_inst_freq() video driver is calculating
> macro blocks per frame in steam of macro blocks per second(mpbs).
> Which results frequency is always setting to lower frequency (150MB)
> as per frequency table for sc7180. Hence the playback is not smooth.
>
> Corrected this by correcting the mbps calculation.
>
> Signed-off-by: Mansur Alisha Shaik <mansur@...eaurora.org>
> ---
>  drivers/media/platform/qcom/venus/pm_helpers.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c
> index 57877ea..001513f 100644
> --- a/drivers/media/platform/qcom/venus/pm_helpers.c
> +++ b/drivers/media/platform/qcom/venus/pm_helpers.c
> @@ -928,7 +928,7 @@ static unsigned long calculate_inst_freq(struct venus_inst *inst,
>         u32 fps = (u32)inst->fps;
>         u32 mbs_per_sec;
>
> -       mbs_per_sec = load_per_instance(inst) / fps;
> +       mbs_per_sec = load_per_instance(inst);
>
>         vpp_freq = mbs_per_sec * inst->clk_data.codec_freq_data->vpp_freq;
>         /* 21 / 20 is overhead factor */
> --
> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
> of Code Aurora Forum, hosted by The Linux Foundation
>

Reviewed-by: Fritz Koenig <frkoenig@...omium.org>