linux-kernel - Re: [PATCH v2 2/5] media: venus: add a routine to set venus state

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Date:   Tue, 5 Jun 2018 16:33:27 +0530
From:   Vinod <vkoul@...nel.org>
To:     Vikash Garodia <vgarodia@...eaurora.org>
Cc:     hverkuil@...all.nl, mchehab@...nel.org, robh@...nel.org,
        mark.rutland@....com, andy.gross@...aro.org,
        bjorn.andersson@...aro.org, stanimir.varbanov@...aro.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        devicetree@...r.kernel.org, acourbot@...omium.org
Subject: Re: [PATCH v2 2/5] media: venus: add a routine to set venus state

On 02-06-18, 01:56, Vikash Garodia wrote:

> +int venus_set_hw_state(enum tzbsp_video_state state, struct venus_core *core)
> +{
> +	int ret;

this should be init to 0 ...

> +	struct device *dev = core->dev;
> +	void __iomem *reg_base = core->base;
> +
> +	switch (state) {
> +	case TZBSP_VIDEO_SUSPEND:
> +		if (qcom_scm_is_available())
> +			ret = qcom_scm_set_remote_state(TZBSP_VIDEO_SUSPEND, 0);
> +		else
> +			writel_relaxed(1, reg_base + WRAPPER_A9SS_SW_RESET);
> +		break;
> +	case TZBSP_VIDEO_RESUME:
> +		if (qcom_scm_is_available())
> +			ret = qcom_scm_set_remote_state(TZBSP_VIDEO_RESUME, 0);
> +		else
> +			venus_reset_hw(core);
> +		break;
> +	default:

if it is default, ret contains garbage

> +		dev_err(dev, "invalid state\n");
> +		break;
> +	}
> +	return ret;

and that is returned.

Compiler should complain about these ...

> -enum tzbsp_video_state {
> -	TZBSP_VIDEO_STATE_SUSPEND = 0,
> -	TZBSP_VIDEO_STATE_RESUME
> -};

ah you are moving existing defines, please mention this in changelog.
Till this line I was expecting additions...
-- 
~Vinod