linux-kernel - Re: [PATCH v3 09/14] drm/sun4i: Allow VI layers to be primary planes

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Date:   Sun, 24 Apr 2022 22:01:15 +0200
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     Chen-Yu Tsai <wens@...e.org>, Maxime Ripard <mripard@...nel.org>,
        Samuel Holland <samuel@...lland.org>
Cc:     Samuel Holland <samuel@...lland.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH v3 09/14] drm/sun4i: Allow VI layers to be primary planes

Dne nedelja, 24. april 2022 ob 18:26:27 CEST je Samuel Holland napisal(a):
> D1's mixer 1 has no UI layers, only a single VI layer. That means the
> mixer can only be used if the primary plane comes from this VI layer.
> Add the code to handle this case.
> 
> Signed-off-by: Samuel Holland <samuel@...lland.org>

Reviewed-by: Jernej Skrabec <jernej.skrabec@...il.com>

Best regards,
Jernej Skrabec

> ---
> 
> (no changes since v2)
> 
> Changes in v2:
>  - Use Jernej's patches for mixer mode setting.
> 
>  drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/
sun8i_vi_layer.c
> index bb7c43036dfa..f7d0b082d634 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> @@ -542,6 +542,7 @@ struct sun8i_vi_layer *sun8i_vi_layer_init_one(struct 
drm_device *drm,
>  					       struct 
sun8i_mixer *mixer,
>  					       int index)
>  {
> +	enum drm_plane_type type = DRM_PLANE_TYPE_OVERLAY;
>  	u32 supported_encodings, supported_ranges;
>  	unsigned int plane_cnt, format_count;
>  	struct sun8i_vi_layer *layer;
> @@ -560,12 +561,15 @@ struct sun8i_vi_layer *sun8i_vi_layer_init_one(struct 
drm_device *drm,
>  		format_count = ARRAY_SIZE(sun8i_vi_layer_formats);
>  	}
>  
> +	if (!mixer->cfg->ui_num && index == 0)
> +		type = DRM_PLANE_TYPE_PRIMARY;
> +
>  	/* possible crtcs are set later */
>  	ret = drm_universal_plane_init(drm, &layer->plane, 0,
>  				       &sun8i_vi_layer_funcs,
>  				       formats, format_count,
>  				       sun8i_layer_modifiers,
> -				       DRM_PLANE_TYPE_OVERLAY, 
NULL);
> +				       type, NULL);
>  	if (ret) {
>  		dev_err(drm->dev, "Couldn't initialize layer\n");
>  		return ERR_PTR(ret);
> -- 
> 2.35.1
> 
>