linux-kernel - Re: [PATCH v2 01/18] media: venus: hfi_venus: Only consider sys_idle

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Date:   Fri, 5 May 2023 17:58:19 +0530
From:   Vikash Garodia <quic_vgarodia@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Stanimir Varbanov <stanimir.k.varbanov@...il.com>,
        Andy Gross <agross@...nel.org>,
        "Bjorn Andersson" <andersson@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Dikshita Agarwal <dikshita@....qualcomm.com>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Mansur Alisha Shaik <mansur@...eaurora.org>,
        Jonathan Marek <jonathan@...ek.ca>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Dikshita Agarwal <quic_dikshita@...cinc.com>
CC:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        <linux-media@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        "Marijn Suijten" <marijn.suijten@...ainline.org>
Subject: Re: [PATCH v2 01/18] media: venus: hfi_venus: Only consider
 sys_idle_indicator on V1

On 5/4/2023 1:30 PM, Konrad Dybcio wrote:
> As per information from Qualcomm [1], this property is not really
> supported beyond msm8916 (HFI V1) and some newer HFI versions really
> dislike receiving it, going as far as crashing the device.
>
> Only consider toggling it (via the module option) on HFIV1.
> While at it, get rid of the global static variable (which defaulted
> to zero) which was never explicitly assigned to for V1.
>
> Note: [1] is a reply to the actual message in question, as lore did not
> properly receive some of the emails..
>
> [1] https://lore.kernel.org/lkml/955cd520-3881-0c22-d818-13fe9a47e124@linaro.org/
> Fixes: 7ed9e0b3393c ("media: venus: hfi, vdec: v6 Add IS_V6() to existing IS_V4() if locations")
> Fixes: d96d3f30c0f2 ("[media] media: venus: hfi: add Venus HFI files")
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>   drivers/media/platform/qcom/venus/hfi_venus.c | 18 ++++++------------
>   1 file changed, 6 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/media/platform/qcom/venus/hfi_venus.c b/drivers/media/platform/qcom/venus/hfi_venus.c
> index 2ad40b3945b0..bff435abd59b 100644
> --- a/drivers/media/platform/qcom/venus/hfi_venus.c
> +++ b/drivers/media/platform/qcom/venus/hfi_venus.c
> @@ -131,7 +131,6 @@ struct venus_hfi_device {
>   
>   static bool venus_pkt_debug;
>   int venus_fw_debug = HFI_DEBUG_MSG_ERROR | HFI_DEBUG_MSG_FATAL;
> -static bool venus_sys_idle_indicator;
>   static bool venus_fw_low_power_mode = true;
>   static int venus_hw_rsp_timeout = 1000;
>   static bool venus_fw_coverage;
> @@ -947,17 +946,12 @@ static int venus_sys_set_default_properties(struct venus_hfi_device *hdev)
>   	if (ret)
>   		dev_warn(dev, "setting fw debug msg ON failed (%d)\n", ret);
>   
> -	/*
> -	 * Idle indicator is disabled by default on some 4xx firmware versions,
> -	 * enable it explicitly in order to make suspend functional by checking
> -	 * WFI (wait-for-interrupt) bit.
> -	 */
> -	if (IS_V4(hdev->core) || IS_V6(hdev->core))
> -		venus_sys_idle_indicator = true;
> -
> -	ret = venus_sys_set_idle_message(hdev, venus_sys_idle_indicator);
> -	if (ret)
> -		dev_warn(dev, "setting idle response ON failed (%d)\n", ret);
> +	/* HFI_PROPERTY_SYS_IDLE_INDICATOR is not supported beyond 8916 (HFI V1) */
> +	if (IS_V1(hdev->core)) {
> +		ret = venus_sys_set_idle_message(hdev, false);
> +		if (ret)
> +			dev_warn(dev, "setting idle response ON failed (%d)\n", ret);
> +	}

This property was enabled in video firmware for SDM845 by default from 
version #7. Need to confirm if patch[1]

was added before the default enablement in firmware. This patch need to 
be verified on SDM845 for suspend

functionality, before removing it for V4 to avoid power regression.

[1] 17cd3d1d2e52: media: venus: hfi_venus: add suspend functionality for 
Venus 4xx

-Vikash

>   
>   	ret = venus_sys_set_power_control(hdev, venus_fw_low_power_mode);
>   	if (ret)
>