linux-kernel - Re: [PATCH v5 20/36] drm/bridge: analogix_dp: Don't use ANALOGIX_DP_PLL

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Message-ID: <d6e35524-3eb6-8fa6-21c3-9f9463365236@codeaurora.org>
Date:   Wed, 14 Mar 2018 12:03:02 +0530
From:   Archit Taneja <architt@...eaurora.org>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        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, ykk@...k-chips.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,
        linux-input@...r.kernel.org, orjan.eide@....com,
        wxt@...k-chips.com, jeffy.chen@...k-chips.com,
        linux-arm-kernel@...ts.infradead.org, mark.yao@...k-chips.com,
        wzz@...k-chips.com, hl@...k-chips.com, jingoohan1@...il.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: [PATCH v5 20/36] drm/bridge: analogix_dp: Don't use
 ANALOGIX_DP_PLL_CTL to control pll



On Saturday 10 March 2018 03:53 AM, Enric Balletbo i Serra wrote:
> From: zain wang <wzz@...k-chips.com>
> 
> There is no register named ANALOGIX_DP_PLL_CTL in Rockchip edp phy reg
> list.  We should use BIT_4 in ANALOGIX_DP_PD to control the pll power
> instead of ANALOGIX_DP_PLL_CTL.
> 

Reviewed-by: Archit Taneja <architt@...eaurora.org>

Thanks,
Archit

> Cc: Douglas Anderson <dianders@...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>
> ---
> 
>   drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 20 ++++++++++++--------
>   1 file changed, 12 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
> index 7b7fd227e1f9..02ab1aaa9993 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
> @@ -230,16 +230,20 @@ enum pll_status analogix_dp_get_pll_lock_status(struct analogix_dp_device *dp)
>   void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable)
>   {
>   	u32 reg;
> +	u32 mask = DP_PLL_PD;
> +	u32 pd_addr = ANALOGIX_DP_PLL_CTL;
>   
> -	if (enable) {
> -		reg = readl(dp->reg_base + ANALOGIX_DP_PLL_CTL);
> -		reg |= DP_PLL_PD;
> -		writel(reg, dp->reg_base + ANALOGIX_DP_PLL_CTL);
> -	} else {
> -		reg = readl(dp->reg_base + ANALOGIX_DP_PLL_CTL);
> -		reg &= ~DP_PLL_PD;
> -		writel(reg, dp->reg_base + ANALOGIX_DP_PLL_CTL);
> +	if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) {
> +		pd_addr = ANALOGIX_DP_PD;
> +		mask = RK_PLL_PD;
>   	}
> +
> +	reg = readl(dp->reg_base + pd_addr);
> +	if (enable)
> +		reg |= mask;
> +	else
> +		reg &= ~mask;
> +	writel(reg, dp->reg_base + pd_addr);
>   }
>   
>   void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
>