linux-kernel - Re: [PATCH 19/28] drm/mediatek: add connection from RDMA2 to DPI1

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Message-ID: <1528874037.30263.6.camel@mtksdaap41>
Date:   Wed, 13 Jun 2018 15:13:57 +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 19/28] drm/mediatek: add connection from RDMA2 to DPI1

Hi, Stu:

On Mon, 2018-06-11 at 11:26 +0800, Stu Hsieh wrote:
> This patch add the connection from RDMA2 to DPI1
> 
> Signed-off-by: Stu Hsieh <stu.hsieh@...iatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_ddp.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> index 31a0832ef9ec..2d883815d79c 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> @@ -93,9 +93,11 @@
>  #define RDMA1_MOUT_DPI0			0x2
>  #define RDMA1_MOUT_DPI1			0x3
>  #define RDMA2_MOUT_DPI0			0x2
> +#define RDMA2_MOUT_DPI1			0x3

Usually, each bit of a mout register represent a output enable. Is this
value 0x3 a correct value?

Regards,
CK

>  #define DPI0_SEL_IN_RDMA1		0x1
>  #define DPI0_SEL_IN_RDMA2		0x3
>  #define DPI1_SEL_IN_RDMA1		(0x1 << 8)
> +#define DPI1_SEL_IN_RDMA2		(0x3 << 8)
>  #define DSI1_SEL_IN_RDMA1		0x1
>  #define DSI2_SEL_IN_RDMA1		(0x1 << 16)
>  #define DSI3_SEL_IN_RDMA1		(0x1 << 16)
> @@ -199,6 +201,9 @@ static unsigned int mtk_ddp_mout_en(enum mtk_ddp_comp_id cur,
>  	} else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DPI0) {
>  		*addr = DISP_REG_CONFIG_DISP_RDMA2_SOUT;
>  		value = RDMA2_MOUT_DPI0;
> +	} else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DPI1) {
> +		*addr = DISP_REG_CONFIG_DISP_RDMA2_SOUT;
> +		value = RDMA2_MOUT_DPI1;
>  	} else {
>  		value = 0;
>  	}
> @@ -233,6 +238,9 @@ static unsigned int mtk_ddp_sel_in(enum mtk_ddp_comp_id cur,
>  	} else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DPI0) {
>  		*addr = DISP_REG_CONFIG_DPI_SEL_IN;
>  		value = DPI0_SEL_IN_RDMA2;
> +	} else if (cur == DDP_COMPONENT_RDMA2 && next == DDP_COMPONENT_DPI1) {
> +		*addr = DISP_REG_CONFIG_DPI_SEL_IN;
> +		value = DPI1_SEL_IN_RDMA2;
>  	} else if (cur == DDP_COMPONENT_OVL1 && next == DDP_COMPONENT_COLOR1) {
>  		*addr = DISP_REG_CONFIG_DISP_COLOR1_SEL_IN;
>  		value = COLOR1_SEL_IN_OVL1;