From mboxrd@z Thu Jan  1 00:00:00 1970
From: CK Hu <ck.hu@mediatek.com>
Subject: Re: [PATCH 27/28] drm/mediatek: add third ddp path
Date: Wed, 13 Jun 2018 15:38:37 +0800
Message-ID: <1528875517.30263.15.camel@mtksdaap41>
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         <1528687580-549-28-git-send-email-stu.hsieh@mediatek.com>
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To: Stu Hsieh <stu.hsieh@mediatek.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>, David Airlie <airlied@linux.ie>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Matthias Brugger <matthias.bgg@gmail.com>, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, srv_heupstream@mediatek.com
List-Id: devicetree@vger.kernel.org

On Mon, 2018-06-11 at 11:26 +0800, Stu Hsieh wrote:
> This patch create third crtc by third ddp path
> 
> Signed-off-by: Stu Hsieh <stu.hsieh@mediatek.com>

Reviewed-by: CK Hu <ck.hu at mediatek.com>

> ---
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 3 +++
>  drivers/gpu/drm/mediatek/mtk_drm_drv.c  | 5 +++++
>  drivers/gpu/drm/mediatek/mtk_drm_drv.h  | 5 ++++-
>  3 files changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index 658b8dd45b83..2d6aa150a9ff 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -539,6 +539,9 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>  	int ret;
>  	int i;
>  
> +	if (!path)
> +		return 0;
> +
>  	for (i = 0; i < path_len; i++) {
>  		enum mtk_ddp_comp_id comp_id = path[i];
>  		struct device_node *node;
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index 08d5d0b47bfe..3d279a299383 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -232,6 +232,11 @@ static int mtk_drm_kms_init(struct drm_device *drm)
>  	if (ret < 0)
>  		goto err_component_unbind;
>  
> +	ret = mtk_drm_crtc_create(drm, private->data->third_path,
> +				  private->data->third_len);
> +	if (ret < 0)
> +		goto err_component_unbind;
> +
>  	/* Use OVL device for all DMA memory allocations */
>  	np = private->comp_node[private->data->main_path[0]] ?:
>  	     private->comp_node[private->data->ext_path[0]];
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> index c3378c452c0a..ecc00ca3221d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> @@ -17,7 +17,7 @@
>  #include <linux/io.h>
>  #include "mtk_drm_ddp_comp.h"
>  
> -#define MAX_CRTC	2
> +#define MAX_CRTC	3
>  #define MAX_CONNECTOR	2
>  
>  struct device;
> @@ -33,6 +33,9 @@ struct mtk_mmsys_driver_data {
>  	unsigned int main_len;
>  	const enum mtk_ddp_comp_id *ext_path;
>  	unsigned int ext_len;
> +	const enum mtk_ddp_comp_id *third_path;
> +	unsigned int third_len;
> +
>  	bool shadow_register;
>  };
>