linux-kernel - Re: [PATCH v8 1/2] drm/msm/disp/dpu1: add inline function to validate format support

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Message-ID: <d39dca75-4f0c-6a8a-8bb3-fb745116c6f8@linaro.org>
Date:   Thu, 14 Apr 2022 01:48:12 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Vinod Polimera <quic_vpolimer@...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@...il.com,
        dianders@...omium.org, quic_kalyant@...cinc.com
Subject: Re: [PATCH v8 1/2] drm/msm/disp/dpu1: add inline function to validate
 format support

On 11/04/2022 19:37, Vinod Polimera wrote:
> Check if the dpu format is supported or not using dpu_find_format.
> 
> Co-developed-by: Kalyan Thota <quic_kalyant@...cinc.com>
> Signed-off-by: Kalyan Thota <quic_kalyant@...cinc.com>
> Signed-off-by: Vinod Polimera <quic_vpolimer@...cinc.com>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_formats.h | 22 ++++++++++++++++++++++
>   drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c   | 10 +++-------
>   2 files changed, 25 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_formats.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_formats.h
> index 418f5ae..84b8b32 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_formats.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_formats.h
> @@ -21,6 +21,28 @@ const struct dpu_format *dpu_get_dpu_format_ext(
>   #define dpu_get_dpu_format(f) dpu_get_dpu_format_ext(f, 0)
>   
>   /**
> + * dpu_find_format - validate if the pixel format is supported
> + * @format:		dpu format
> + * @supported_formats:	supported formats by dpu HW
> + * @num_formatss:	total number of formats
> + *
> + * Return: false if not valid format, true on success
> + */
> +static inline bool dpu_find_format(u32 format, const u32 *supported_formats,
> +					size_t num_formats)
> +{
> +	int i;
> +
> +	for (i = 0; i < num_formats; i++) {
> +		/* check for valid formats supported */
> +		if (format == supported_formats[i])
> +			return true;
> +	}
> +
> +	return false;
> +}
> +
> +/**
>    * dpu_get_msm_format - get an dpu_format by its msm_format base
>    *                     callback function registers with the msm_kms layer
>    * @kms:             kms driver
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> index 6565682..3216cda 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> @@ -1411,13 +1411,9 @@ static bool dpu_plane_format_mod_supported(struct drm_plane *plane,
>   	if (modifier == DRM_FORMAT_MOD_LINEAR)
>   		return true;
>   
> -	if (modifier == DRM_FORMAT_MOD_QCOM_COMPRESSED) {
> -		int i;
> -		for (i = 0; i < ARRAY_SIZE(qcom_compressed_supported_formats); i++) {
> -			if (format == qcom_compressed_supported_formats[i])
> -				return true;
> -		}
> -	}
> +	if (modifier == DRM_FORMAT_MOD_QCOM_COMPRESSED)
> +		return dpu_find_format(format, qcom_compressed_supported_formats,
> +				ARRAY_SIZE(qcom_compressed_supported_formats));
>   
>   	return false;
>   }


-- 
With best wishes
Dmitry