linux-kernel - Re: [PATCH 15/20] drm: rcar-du: Claim CMM support for Gen3 SoCs

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Message-ID: <20190607113845.GD7593@pendragon.ideasonboard.com>
Date:   Fri, 7 Jun 2019 14:38:45 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Jacopo Mondi <jacopo+renesas@...ndi.org>
Cc:     kieran.bingham+renesas@...asonboard.com, airlied@...ux.ie,
        daniel@...ll.ch, koji.matsuoka.xm@...esas.com, muroya@....co.jp,
        VenkataRajesh.Kalakodima@...bosch.com,
        Harsha.ManjulaMallikarjun@...bosch.com,
        linux-renesas-soc@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 15/20] drm: rcar-du: Claim CMM support for Gen3 SoCs

Hi Jacopo,

Thank you for the patch.

On Thu, Jun 06, 2019 at 04:22:15PM +0200, Jacopo Mondi wrote:
> Add CMM to the list of supported features for Gen3 SoCs that provide it:
> - R8A7795
> - R8A7796
> - R8A77965
> - R8A7799x
> 
> Leave R8A77970 out as V3M and V3H are the only Gen3 SoCs that do not
> support CMM.
> 
> Signed-off-by: Jacopo Mondi <jacopo+renesas@...ndi.org>

Do we actually need this ? Could we just skip CMM handling if the cmms
property isn't set in DT ?

> ---
>  drivers/gpu/drm/rcar-du/rcar_du_drv.c | 12 ++++++++----
>  drivers/gpu/drm/rcar-du/rcar_du_drv.h |  1 +
>  2 files changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> index 75ab17af13a9..1e69cfa11798 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> @@ -247,7 +247,8 @@ static const struct rcar_du_device_info rcar_du_r8a7795_info = {
>  	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
>  		  | RCAR_DU_FEATURE_VSP1_SOURCE
>  		  | RCAR_DU_FEATURE_INTERLACED
> -		  | RCAR_DU_FEATURE_TVM_SYNC,
> +		  | RCAR_DU_FEATURE_TVM_SYNC
> +		  | RCAR_DU_FEATURE_CMM,
>  	.channels_mask = BIT(3) | BIT(2) | BIT(1) | BIT(0),
>  	.routes = {
>  		/*
> @@ -280,7 +281,8 @@ static const struct rcar_du_device_info rcar_du_r8a7796_info = {
>  	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
>  		  | RCAR_DU_FEATURE_VSP1_SOURCE
>  		  | RCAR_DU_FEATURE_INTERLACED
> -		  | RCAR_DU_FEATURE_TVM_SYNC,
> +		  | RCAR_DU_FEATURE_TVM_SYNC
> +		  | RCAR_DU_FEATURE_CMM,
>  	.channels_mask = BIT(2) | BIT(1) | BIT(0),
>  	.routes = {
>  		/*
> @@ -309,7 +311,8 @@ static const struct rcar_du_device_info rcar_du_r8a77965_info = {
>  	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
>  		  | RCAR_DU_FEATURE_VSP1_SOURCE
>  		  | RCAR_DU_FEATURE_INTERLACED
> -		  | RCAR_DU_FEATURE_TVM_SYNC,
> +		  | RCAR_DU_FEATURE_TVM_SYNC
> +		  | RCAR_DU_FEATURE_CMM,
>  	.channels_mask = BIT(3) | BIT(1) | BIT(0),
>  	.routes = {
>  		/*
> @@ -357,7 +360,8 @@ static const struct rcar_du_device_info rcar_du_r8a77970_info = {
>  static const struct rcar_du_device_info rcar_du_r8a7799x_info = {
>  	.gen = 3,
>  	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
> -		  | RCAR_DU_FEATURE_VSP1_SOURCE,
> +		  | RCAR_DU_FEATURE_VSP1_SOURCE
> +		  | RCAR_DU_FEATURE_CMM,
>  	.channels_mask = BIT(1) | BIT(0),
>  	.routes = {
>  		/*
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> index 1327cd0df90a..a00dccc447aa 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> @@ -28,6 +28,7 @@ struct rcar_du_encoder;
>  #define RCAR_DU_FEATURE_VSP1_SOURCE	BIT(1)	/* Has inputs from VSP1 */
>  #define RCAR_DU_FEATURE_INTERLACED	BIT(2)	/* HW supports interlaced */
>  #define RCAR_DU_FEATURE_TVM_SYNC	BIT(3)	/* Has TV switch/sync modes */
> +#define RCAR_DU_FEATURE_CMM		BIT(4)	/* Has CMM */
>  
>  #define RCAR_DU_QUIRK_ALIGN_128B	BIT(0)	/* Align pitches to 128 bytes */
>  

-- 
Regards,

Laurent Pinchart