linux-kernel - Re: [regression, bisected] rockchip rk3399 video output breakage

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Message-ID: <179239ba-0833-945c-0c2f-26fd9b7c2755@theobroma-systems.com>
Date:   Tue, 24 Apr 2018 15:47:35 +0200
From:   Jakob Unterwurzacher <jakob.unterwurzacher@...obroma-systems.com>
To:     JeffyChen <jeffy.chen@...k-chips.com>,
        linux-kernel@...r.kernel.org, Joerg Roedel <jroedel@...e.de>,
        linux-rockchip@...ts.infradead.org
Cc:     klaus.goger@...obroma-systems.com,
        Huang Jiachai <sandy.huang@...k-chips.com>
Subject: Re: [regression, bisected] rockchip rk3399 video output breakage

On 24.04.18 15:33, JeffyChen wrote:
>>> [   36.076577] WARNING: CPU: 1 PID: 83 at
>>> drivers/gpu/drm/rockchip/rockchip_drm_vop.c:1004
>>> vop_crtc_atomic_flush+0x1c0/0x1c8
> 
> this looks like an issue recently reported by heiko, we found that might 
> due to an unbalanced irq disable in vop driver.
> 
> my test patch is:
> 
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> @@ -1601,6 +1601,8 @@ static void vop_unbind(struct device *dev, struct 
> device *master, void *data)
>   {
>          struct vop *vop = dev_get_drvdata(dev);
> 
> +       // Pair with the initial disable_irq()
> +       enable_irq(vop->irq);
> 
> 
> 
> and i think sandy would send the real patch soon(maybe already sent?)

Works fine with your patch! Thank you very much Jeffy.

Best regards,
Jakob