linux-kernel - Re: [RESEND PATCH v6 16/27] drm/bridge: analogix_dp: Fix incorrect operations with register ANALOGIX_DP_FUNC_EN

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Message-ID: <000101d3db6b$a2a14d20$e7e3e760$@gmail.com>
Date:   Mon, 23 Apr 2018 21:29:04 -0400
From:   "Jingoo Han" <jingoohan1@...il.com>
To:     "'Enric Balletbo i Serra'" <enric.balletbo@...labora.com>,
        <architt@...eaurora.org>, <inki.dae@...sung.com>,
        <thierry.reding@...il.com>, <hjc@...k-chips.com>,
        <seanpaul@...omium.org>, <airlied@...ux.ie>, <tfiga@...omium.org>,
        <heiko@...ech.de>
Cc:     <dri-devel@...ts.freedesktop.org>, <dianders@...omium.org>,
        <a.hajda@...sung.com>, <kernel@...labora.com>,
        <m.szyprowski@...sung.com>, <linux-samsung-soc@...r.kernel.org>,
        <jy0922.shim@...sung.com>, <rydberg@...math.org>,
        <krzk@...nel.org>, <linux-rockchip@...ts.infradead.org>,
        <kgene@...nel.org>, <orjan.eide@....com>, <wxt@...k-chips.com>,
        <jeffy.chen@...k-chips.com>,
        <linux-arm-kernel@...ts.infradead.org>, <wzz@...k-chips.com>,
        <hl@...k-chips.com>, <sw0312.kim@...sung.com>,
        <linux-kernel@...r.kernel.org>, <kyungmin.park@...sung.com>,
        <Laurent.pinchart@...asonboard.com>, <kuankuan.y@...il.com>,
        <hshi@...omium.org>
Subject: Re: [RESEND PATCH v6 16/27] drm/bridge: analogix_dp: Fix incorrect operations with register ANALOGIX_DP_FUNC_EN_1

On Monday, April 23, 2018 6:50 AM, Enric Balletbo i Serra wrote:
> 
> From: zain wang <wzz@...k-chips.com>
> 
> Register ANALOGIX_DP_FUNC_EN_1(offset 0x18), Rockchip is different to
> Exynos:
> 
> on Exynos edp phy,
> BIT 7		MASTER_VID_FUNC_EN_N
> BIT 6		reserved
> BIT 5		SLAVE_VID_FUNC_EN_N
> 
> on Rockchip edp phy,
> BIT 7		reserved
> BIT 6		RK_VID_CAP_FUNC_EN_N
> BIT 5		RK_VID_FIFO_FUNC_EN_N
> 
> So, we should do some private operations to Rockchip.
> 
> Cc: Tomasz Figa <tfiga@...omium.org>
> Signed-off-by: zain wang <wzz@...k-chips.com>
> Signed-off-by: Sean Paul <seanpaul@...omium.org>
> Signed-off-by: Thierry Escande <thierry.escande@...labora.com>
> Reviewed-by: Andrzej Hajda <a.hajda@...sung.com>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
> Reviewed-by: Archit Taneja <architt@...eaurora.org>

Acked-by: Jingoo Han <jingoohan1@...il.com>

Best regards,
Jingoo Han

> ---
> 
>  .../gpu/drm/bridge/analogix/analogix_dp_reg.c | 19 ++++++++++++++-----
>  .../gpu/drm/bridge/analogix/analogix_dp_reg.h |  2 ++
>  2 files changed, 16 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
> b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
> index 02ab1aaa9993..4eae206ec31b 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
> @@ -126,9 +126,14 @@ void analogix_dp_reset(struct analogix_dp_device *dp)
>  	analogix_dp_stop_video(dp);
>  	analogix_dp_enable_video_mute(dp, 0);
> 
> -	reg = MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N |
> -		AUD_FIFO_FUNC_EN_N | AUD_FUNC_EN_N |
> -		HDCP_FUNC_EN_N | SW_FUNC_EN_N;
> +	if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
> +		reg = RK_VID_CAP_FUNC_EN_N | RK_VID_FIFO_FUNC_EN_N |
> +			SW_FUNC_EN_N;
> +	else
> +		reg = MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N |
> +			AUD_FIFO_FUNC_EN_N | AUD_FUNC_EN_N |
> +			HDCP_FUNC_EN_N | SW_FUNC_EN_N;
> +
>  	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
> 
>  	reg = SSC_FUNC_EN_N | AUX_FUNC_EN_N |
> @@ -971,8 +976,12 @@ void analogix_dp_config_video_slave_mode(struct
> analogix_dp_device *dp)
>  	u32 reg;
> 
>  	reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
> -	reg &= ~(MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N);
> -	reg |= MASTER_VID_FUNC_EN_N;
> +	if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) {
> +		reg &= ~(RK_VID_CAP_FUNC_EN_N | RK_VID_FIFO_FUNC_EN_N);
> +	} else {
> +		reg &= ~(MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N);
> +		reg |= MASTER_VID_FUNC_EN_N;
> +	}
>  	writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
> 
>  	reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h
> b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h
> index b633a4a5082a..0cf27c731727 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h
> @@ -127,7 +127,9 @@
> 
>  /* ANALOGIX_DP_FUNC_EN_1 */
>  #define MASTER_VID_FUNC_EN_N			(0x1 << 7)
> +#define RK_VID_CAP_FUNC_EN_N			(0x1 << 6)
>  #define SLAVE_VID_FUNC_EN_N			(0x1 << 5)
> +#define RK_VID_FIFO_FUNC_EN_N			(0x1 << 5)
>  #define AUD_FIFO_FUNC_EN_N			(0x1 << 4)
>  #define AUD_FUNC_EN_N				(0x1 << 3)
>  #define HDCP_FUNC_EN_N				(0x1 << 2)
> --
> 2.17.0