linux-kernel - Re: [PATCH 13/28] drm/mediatek: add connection from RDMA0 to DSI3

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Message-ID: <1528868751.15127.10.camel@mtksdaap41>
Date:   Wed, 13 Jun 2018 13:45:51 +0800
From:   CK Hu <ck.hu@...iatek.com>
To:     Stu Hsieh <stu.hsieh@...iatek.com>
CC:     Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <srv_heupstream@...iatek.com>
Subject: Re: [PATCH 13/28] drm/mediatek: add connection from RDMA0 to DSI3

Hi, Stu:

Two inline comment.

On Mon, 2018-06-11 at 11:26 +0800, Stu Hsieh wrote:
> This patch add the connection from RDMA0 to DSI3
> 
> Signed-off-by: Stu Hsieh <stu.hsieh@...iatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_ddp.c      | 4 ++++
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 2 +-
>  2 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> index c08aed8dae44..fed1b5704355 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> @@ -83,6 +83,7 @@
>  #define GAMMA_MOUT_EN_RDMA1		0x1
>  #define RDMA0_MOUT_DPI0			0x2
>  #define RDMA0_MOUT_DSI2			0x4
> +#define RDMA0_MOUT_DSI3			0x5

Usually, each bit of a mout register represent a output enable. Is this
value 0x5 is a correct value?

>  #define RDMA1_MOUT_DPI0			0x2
>  #define DPI0_SEL_IN_RDMA1		0x1
>  #define COLOR1_SEL_IN_OVL1		0x1
> @@ -164,6 +165,9 @@ static unsigned int mtk_ddp_mout_en(enum mtk_ddp_comp_id cur,
>  	} else if (cur == DDP_COMPONENT_RDMA0 && next == DDP_COMPONENT_DSI2) {
>  		*addr = DISP_REG_CONFIG_DISP_RDMA0_MOUT_EN;
>  		value = RDMA0_MOUT_DSI2;
> +	} else if (cur == DDP_COMPONENT_RDMA0 && next == DDP_COMPONENT_DSI3) {
> +		*addr = DISP_REG_CONFIG_DISP_RDMA0_MOUT_EN;
> +		value = RDMA0_MOUT_DSI3;
>  	} else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI0) {
>  		*addr = DISP_REG_CONFIG_DISP_RDMA1_MOUT_EN;
>  		value = RDMA1_MOUT_DPI0;
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index fe6fdc021fc7..22f4c72fa785 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -228,7 +228,7 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
>  	[DDP_COMPONENT_DSI0]	= { MTK_DSI,		0, NULL },
>  	[DDP_COMPONENT_DSI1]	= { MTK_DSI,		1, NULL },
>  	[DDP_COMPONENT_DSI2]	= { MTK_DSI,		2, NULL },
> -	[DDP_COMPONENT_DSI2]	= { MTK_DSI,		3, NULL },
> +	[DDP_COMPONENT_DSI3]	= { MTK_DSI,		3, NULL },

I think this is not related to this patch.

Regards,
CK

>  	[DDP_COMPONENT_GAMMA]	= { MTK_DISP_GAMMA,	0, &ddp_gamma },
>  	[DDP_COMPONENT_OD0]	= { MTK_DISP_OD,	0, &ddp_od },
>  	[DDP_COMPONENT_OD1]	= { MTK_DISP_OD,	1, &ddp_od },