linux-kernel - Re: [PATCH 3/4] drm/msm/disp/dpu1: helper function to determine if encoder is virtual

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Message-ID: <3f054ff6-3868-d0c0-a8ad-66b87489714f@linaro.org>
Date:   Wed, 9 Nov 2022 15:23:34 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Kalyan Thota <quic_kalyant@...cinc.com>,
        dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, robdclark@...omium.org,
        dianders@...omium.org, swboyd@...omium.org,
        quic_vpolimer@...cinc.com, quic_abhinavk@...cinc.com
Subject: Re: [PATCH 3/4] drm/msm/disp/dpu1: helper function to determine if
 encoder is virtual

On 09/11/2022 15:16, Kalyan Thota wrote:
> Add a helper function to determine if an encoder is of type
> virtual.

Please use commit messages to describe why you are doing something, not 
what you are doing. In this case I can predict, why do you need this API 
without going to patch 4.

> 
> Signed-off-by: Kalyan Thota <quic_kalyant@...cinc.com>
> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 11 +++++++++++
>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h |  6 ++++++
>   2 files changed, 17 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 5d6ad1f..4c56a16 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -2469,6 +2469,17 @@ bool dpu_encoder_is_external(struct drm_encoder *drm_enc)
>   	return dpu_enc->disp_info.is_external;
>   }
>   
> +bool dpu_encoder_is_virtual(struct drm_encoder *drm_enc)
> +{
> +	struct dpu_encoder_virt *dpu_enc;
> +
> +	if (!drm_enc)
> +		return false;
> +
> +	dpu_enc = to_dpu_encoder_virt(drm_enc);
> +	return (dpu_enc->disp_info.intf_type == DRM_MODE_ENCODER_VIRTUAL);
> +}
> +
>   struct drm_encoder *dpu_encoder_init(struct drm_device *dev,
>   		int drm_enc_mode)
>   {
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> index 43f0d8b..6ae3c62 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> @@ -136,6 +136,12 @@ void dpu_encoder_virt_runtime_resume(struct drm_encoder *encoder);
>   bool dpu_encoder_is_external(struct drm_encoder *drm_enc);
>   
>   /**
> + * dpu_encoder_is_virtual - find if the encoder is of type virtual.
> + * @drm_enc:    Pointer to previously created drm encoder structure
> + */
> +bool dpu_encoder_is_virtual(struct drm_encoder *drm_enc);
> +
> +/**
>    * dpu_encoder_init - initialize virtual encoder object
>    * @dev:        Pointer to drm device structure
>    * @disp_info:  Pointer to display information structure

-- 
With best wishes
Dmitry