linux-kernel - Re: [PATCH 5/9] drm: atmel-hlcdc: add compatible string check for XLCDC and HLCDC

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Date:   Wed, 14 Jun 2023 06:49:09 +0000
From:   <Claudiu.Beznea@...rochip.com>
To:     <Manikandan.M@...rochip.com>, <lee@...nel.org>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <Nicolas.Ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <sam@...nborg.org>,
        <bbrezillon@...nel.org>, <airlied@...il.com>, <daniel@...ll.ch>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>
CC:     <Hari.PrasathGE@...rochip.com>,
        <Balamanikandan.Gunasundar@...rochip.com>,
        <Durai.ManickamKR@...rochip.com>, <Nayabbasha.Sayed@...rochip.com>,
        <Dharma.B@...rochip.com>, <Varshini.Rajendran@...rochip.com>,
        <Balakrishnan.S@...rochip.com>
Subject: Re: [PATCH 5/9] drm: atmel-hlcdc: add compatible string check for
 XLCDC and HLCDC

On 13.06.2023 10:04, Manikandan Muralidharan wrote:
> From: Durai Manickam KR <durai.manickamkr@...rochip.com>
> 
> Add compatible string check to differentiate XLCDC and HLCDC code
> within the atmel-hlcdc driver files.
> 
> Signed-off-by: Durai Manickam KR <durai.manickamkr@...rochip.com>
> Signed-off-by: Manikandan Muralidharan <manikandan.m@...rochip.com>
> ---
>  drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 7 +++++++
>  drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h | 1 +
>  2 files changed, 8 insertions(+)
> 
> diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> index d7ad828e9e8c..fbbd2592efc7 100644
> --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> @@ -761,6 +761,13 @@ static int atmel_hlcdc_dc_load(struct drm_device *dev)
>  	if (!dc)
>  		return -ENOMEM;
>  
> +	/* SAM9X7 supports XLCDC */
> +	if (!strcmp(match->compatible, "microchip,sam9x7-xlcdc"))

This could be avoided if ix_xlcd in added in driver data.

> +		dc->is_xlcdc = true;
> +	else
> +		/* Other SoC's that supports HLCDC IP */
> +		dc->is_xlcdc = false;
> +
>  	dc->desc = match->data;
>  	dc->hlcdc = dev_get_drvdata(dev->dev->parent);
>  	dev->dev_private = dc;
> diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
> index aed1742b3665..804e4d476f2b 100644
> --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
> +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h
> @@ -451,6 +451,7 @@ struct atmel_hlcdc_dc {
>  		u32 imr;
>  		struct drm_atomic_state *state;
>  	} suspend;
> +	bool is_xlcdc;
>  };
>  
>  extern struct atmel_hlcdc_formats atmel_hlcdc_plane_rgb_formats;