linux-kernel - Re: [PATCH v2 11/13] drm/mediatek: implement connection from BLS to DPI0

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Date:   Thu, 6 Sep 2018 13:42:54 +0800
From:   CK Hu <ck.hu@...iatek.com>
To:     Bibby Hsieh <bibby.hsieh@...iatek.com>
CC:     David Airlie <airlied@...ux.ie>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-mediatek@...ts.infradead.org>,
        Yingjoe Chen <yingjoe.chen@...iatek.com>,
        Cawa Cheng <cawa.cheng@...iatek.com>,
        Daniel Kurtz <djkurtz@...omium.org>,
        "Philipp Zabel" <p.zabel@...gutronix.de>,
        YT Shen <yt.shen@...iatek.com>,
        "Thierry Reding" <thierry.reding@...il.com>,
        Mao Huang <littlecvr@...omium.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        "Sascha Hauer" <kernel@...gutronix.de>
Subject: Re: [PATCH v2 11/13] drm/mediatek: implement connection from BLS to
 DPI0

Hi, Bibby:

On Wed, 2018-09-05 at 16:31 +0800, Bibby Hsieh wrote:
> Modify display driver to support connection from BLS to DPI.
> 
> Signed-off-by: Bibby Hsieh <bibby.hsieh@...iatek.com>

Reviewed-by: CK Hu <ck.hu@...iatek.com>

> ---
>  drivers/gpu/drm/mediatek/mtk_drm_ddp.c | 19 ++++++++++++++++++-
>  1 file changed, 18 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> index 87e4191c250e..cc8d49e60c7e 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> @@ -39,6 +39,7 @@
>  #define DISP_REG_CONFIG_DISP_OVL_MOUT_EN	0x030
>  #define DISP_REG_CONFIG_OUT_SEL			0x04c
>  #define DISP_REG_CONFIG_DSI_SEL			0x050
> +#define DISP_REG_CONFIG_DPI_SEL			0x064
>  
>  #define DISP_REG_MUTEX_EN(n)	(0x20 + 0x20 * (n))
>  #define DISP_REG_MUTEX(n)	(0x24 + 0x20 * (n))
> @@ -132,7 +133,11 @@
>  
>  #define OVL_MOUT_EN_RDMA		0x1
>  #define BLS_TO_DSI_RDMA1_TO_DPI1	0x8
> +#define BLS_TO_DPI_RDMA1_TO_DSI		0x2
>  #define DSI_SEL_IN_BLS			0x0
> +#define DPI_SEL_IN_BLS			0x0
> +#define DSI_SEL_IN_RDMA			0x1
> +#define DPI_SEL_IN_RDMA			0x1
>  
>  struct mtk_disp_mutex {
>  	int id;
> @@ -323,9 +328,21 @@ static void mtk_ddp_sout_sel(void __iomem *config_regs,
>  			     enum mtk_ddp_comp_id cur,
>  			     enum mtk_ddp_comp_id next)
>  {
> -	if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DSI0)
> +	if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DSI0) {
>  		writel_relaxed(BLS_TO_DSI_RDMA1_TO_DPI1,
>  			       config_regs + DISP_REG_CONFIG_OUT_SEL);
> +		writel_relaxed(DSI_SEL_IN_BLS,
> +			       config_regs + DISP_REG_CONFIG_DSI_SEL);
> +		writel_relaxed(DPI_SEL_IN_RDMA,
> +			       config_regs + DISP_REG_CONFIG_DPI_SEL);
> +	} else if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DPI0) {
> +		writel_relaxed(BLS_TO_DPI_RDMA1_TO_DSI,
> +			       config_regs + DISP_REG_CONFIG_OUT_SEL);
> +		writel_relaxed(DSI_SEL_IN_RDMA,
> +			       config_regs + DISP_REG_CONFIG_DSI_SEL);
> +		writel_relaxed(DPI_SEL_IN_BLS,
> +			       config_regs + DISP_REG_CONFIG_DPI_SEL);
> +	}
>  }
>  
>  void mtk_ddp_add_comp_to_path(void __iomem *config_regs,