linux-kernel - Re: [PATCH v7 7/9] drm/mediatek: add dsi transfer function

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Date:   Wed, 7 Sep 2016 10:33:52 +0800
From:   CK Hu <ck.hu@...iatek.com>
To:     YT Shen <yt.shen@...iatek.com>
CC:     <dri-devel@...ts.freedesktop.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Daniel Kurtz <djkurtz@...omium.org>,
        Mao Huang <littlecvr@...omium.org>,
        Bibby Hsieh <bibby.hsieh@...iatek.com>,
        "Daniel Vetter" <daniel.vetter@...ll.ch>,
        Thierry Reding <thierry.reding@...il.com>,
        Jie Qiu <jie.qiu@...iatek.com>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chris Wilson <chris@...is-wilson.co.uk>,
        shaoming chen <shaoming.chen@...iatek.com>,
        Jitao Shi <jitao.shi@...iatek.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <srv_heupstream@...iatek.com>,
        Sascha Hauer <kernel@...gutronix.de>,
        <yingjoe.chen@...iatek.com>, <emil.l.velikov@...il.com>
Subject: Re: [PATCH v7 7/9] drm/mediatek: add dsi transfer function

Hi, YT:

On Fri, 2016-09-02 at 19:24 +0800, YT Shen wrote:
> From: shaoming chen <shaoming.chen@...iatek.com>
> 
> add dsi read/write commands for transfer function
> 
> Signed-off-by: shaoming chen <shaoming.chen@...iatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_dsi.c | 188 +++++++++++++++++++++++++++++++++++++
>  1 file changed, 188 insertions(+)
> 

[snip...]

>  
> +static void mtk_dsi_irq_data_clear(struct mtk_dsi *dsi, u32 irq_bit)
> +{
> +	dsi->irq_data &= ~irq_bit;
> +}
> +

[snip...]

> +
> +static s32 mtk_dsi_wait_for_irq_done(struct mtk_dsi *dsi, u32 irq_flag,
> +				     unsigned int timeout)
> +{
> +	s32 ret = 0;
> +	unsigned long jiffies = msecs_to_jiffies(timeout);
> +
> +	ret = wait_event_interruptible_timeout(_dsi_irq_wait_queue,
> +					       dsi->irq_data & irq_flag,
> +					       jiffies);
> +	if (ret == 0) {
> +		dev_info(dsi->dev, "Wait DSI IRQ(0x%08x) Timeout\n", irq_flag);
> +
> +		mtk_dsi_enable(dsi);
> +		mtk_dsi_reset_engine(dsi);
> +	}
> +
> +	return ret;
> +}

I think mtk_dsi_irq_data_clear() and mtk_dsi_wait_for_irq_done() should
be moved to the 6th patch [1] of this series because these two functions
deal the irq control.


[1] https://patchwork.kernel.org/patch/9310819/


Regards,
CK