linux-kernel - Re: [RFC v3 AFBC 12/12] drm/arm/malidp: Added support for AFBC modifiers for all layers except DE

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Message-ID: <20181204175421.GT988@e110455-lin.cambridge.arm.com>
Date:   Tue, 4 Dec 2018 17:54:21 +0000
From:   Liviu Dudau <Liviu.Dudau@....com>
To:     Ayan Halder <Ayan.Halder@....com>
Cc:     Brian Starkey <Brian.Starkey@....com>,
        "malidp@...s.arm.com" <malidp@...s.arm.com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "maxime.ripard@...tlin.com" <maxime.ripard@...tlin.com>,
        "sean@...rly.run" <sean@...rly.run>,
        "maarten.lankhorst@...ux.intel.com" 
        <maarten.lankhorst@...ux.intel.com>,
        "corbet@....net" <corbet@....net>,
        "mchehab+samsung@...nel.org" <mchehab+samsung@...nel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "nicolas.ferre@...rochip.com" <nicolas.ferre@...rochip.com>,
        "arnd@...db.de" <arnd@...db.de>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        nd <nd@....com>
Subject: Re: [RFC v3 AFBC 12/12] drm/arm/malidp: Added support for AFBC
 modifiers for all layers except DE_SMART

On Mon, Dec 03, 2018 at 11:32:06AM +0000, Ayan Halder wrote:
> The list of modifiers to be supported for each plane has been dynamically generated
> from 'malidp_format_modifiers[]' and 'malidp_hw_regmap->features'.
> 
> Changes from v1:-
> 1. Replaced DRM_ERROR() with DRM_DEBUG_KMS() in malidp_format_mod_supported()
> to report unsupported modifiers.
> 
> Changes from v2:-
> 1. Removed malidp_format_mod_supported() from the current patch. This has been added
> in "PATCH 7/12"
> 2. Dynamically generate the list of modifiers (to be supported for each plane) from
> 'malidp_format_modifiers' and features.
> 
> Signed-off-by: Ayan Kumar halder <ayan.halder@....com>

Reviewed-by: Liviu Dudau <liviu.dudau@....com>

Best regards,
Liviu

> ---
>  drivers/gpu/drm/arm/malidp_drv.c    |  1 +
>  drivers/gpu/drm/arm/malidp_planes.c | 28 ++++++++++++++++++++++++++--
>  2 files changed, 27 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
> index b2b97db..be45703 100644
> --- a/drivers/gpu/drm/arm/malidp_drv.c
> +++ b/drivers/gpu/drm/arm/malidp_drv.c
> @@ -388,6 +388,7 @@ static int malidp_init(struct drm_device *drm)
>  	drm->mode_config.max_height = hwdev->max_line_size;
>  	drm->mode_config.funcs = &malidp_mode_config_funcs;
>  	drm->mode_config.helper_private = &malidp_mode_config_helpers;
> +	drm->mode_config.allow_fb_modifiers = true;
>  
>  	ret = malidp_crtc_init(drm);
>  	if (ret)
> diff --git a/drivers/gpu/drm/arm/malidp_planes.c b/drivers/gpu/drm/arm/malidp_planes.c
> index eec0442..01037d0 100644
> --- a/drivers/gpu/drm/arm/malidp_planes.c
> +++ b/drivers/gpu/drm/arm/malidp_planes.c
> @@ -934,6 +934,25 @@ int malidp_de_planes_init(struct drm_device *drm)
>  				  BIT(DRM_MODE_BLEND_COVERAGE);
>  	u32 *formats;
>  	int ret, i, j, n;
> +	u64 supported_modifiers[MODIFIERS_COUNT_MAX];
> +	const u64 *modifiers;
> +
> +	modifiers = malidp_format_modifiers;
> +
> +	if (!(map->features & MALIDP_DEVICE_AFBC_SUPPORT_SPLIT)) {
> +		/*
> +		 * Since our hardware does not support SPLIT, so build the list of
> +		 * supported modifiers excluding SPLIT ones.
> +		 */
> +		while (*modifiers != DRM_FORMAT_MOD_INVALID) {
> +			if (!(*modifiers & AFBC_SPLIT))
> +				supported_modifiers[j++] = *modifiers;
> +
> +			modifiers++;
> +		}
> +		supported_modifiers[j++] = DRM_FORMAT_MOD_INVALID;
> +		modifiers = supported_modifiers;
> +	}
>  
>  	formats = kcalloc(map->n_pixel_formats, sizeof(*formats), GFP_KERNEL);
>  	if (!formats) {
> @@ -958,9 +977,14 @@ int malidp_de_planes_init(struct drm_device *drm)
>  
>  		plane_type = (i == 0) ? DRM_PLANE_TYPE_PRIMARY :
>  					DRM_PLANE_TYPE_OVERLAY;
> +
> +		/*
> +		 * All the layers except smart layer supports AFBC modifiers.
> +		 */
>  		ret = drm_universal_plane_init(drm, &plane->base, crtcs,
> -					       &malidp_de_plane_funcs, formats,
> -					       n, NULL, plane_type, NULL);
> +				&malidp_de_plane_funcs, formats, n,
> +				(id == DE_SMART) ? NULL : modifiers, plane_type, NULL);
> +
>  		if (ret < 0)
>  			goto cleanup;
>  
> -- 
> 2.7.4
> 

-- 
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