Message-ID: <564EE060.5040404@rock-chips.com>
Date: Fri, 20 Nov 2015 16:57:04 +0800
From: Mark yao <mark.yao@rock-chips.com>
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To: Chris Zhong <zyw@rock-chips.com>, heiko@sntech.de,
        linux-rockchip@lists.infradead.org, treding@nvidia.com,
        emil.l.velikov@gmail.com
CC: airlied@linux.ie, ajaykumar.rs@samsung.com, rmk+kernel@arm.linux.org.uk,
        dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 03/13] drm/rockchip: return a true clock rate to adjusted_mode
References: <1448007339-10966-1-git-send-email-zyw@rock-chips.com> <1448007339-10966-4-git-send-email-zyw@rock-chips.com>
In-Reply-To: <1448007339-10966-4-git-send-email-zyw@rock-chips.com>
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On 2015年11月20日 16:15, Chris Zhong wrote:
> Since the mipi dsi driver need to use the clock of vop to make the
> calculation of Blanking. But sometimes the clock driver can not set a
> accurate clock_rate for vop, get it by clk_round_rate before mode_set,
> so we can get the true value.
>
> Signed-off-by: Chris Zhong <zyw@rock-chips.com>
>
> ---
>
> Changes in v4:
> use clk_round_rate to check the clock rate in vop_crtc_mode_fixup
>
> Changes in v3: None
> Changes in v2: None
>
>   drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 5 +++++
>   1 file changed, 5 insertions(+)
>
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> index 5d8ae5e..eff545b 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> @@ -1136,9 +1136,14 @@ static bool vop_crtc_mode_fixup(struct drm_crtc *crtc,
>   				const struct drm_display_mode *mode,
>   				struct drm_display_mode *adjusted_mode)
>   {
> +	struct vop *vop = to_vop(crtc);
> +
>   	if (adjusted_mode->htotal == 0 || adjusted_mode->vtotal == 0)
>   		return false;
>   
> +	adjusted_mode->clock =
> +		clk_round_rate(vop->dclk, mode->clock * 1000) / 1000;
> +
>   	return true;
>   }
>   
Looks good for me, so
     Acked-by: Mark Yao <mark.yao@rock-chips.com>


-- 
Ｍark Yao


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