linux-kernel - Re: [PATCH 17/20] video: msm: Prevent framebuffer glitch during initialization

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Date:	Mon, 21 Mar 2011 16:39:57 +0300
From:	Sergei Shtylyov <sshtylyov@...sta.com>
To:	Carl Vanderlip <carlv@...eaurora.org>
CC:	David Brown <davidb@...eaurora.org>,
	Daniel Walker <dwalker@...o99.com>,
	Bryan Huntsman <bryanh@...eaurora.org>,
	linux-fbdev@...r.kernel.org, Brian Swetland <swetland@...gle.com>,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Colin Cross <ccross@...roid.com>,
	Rebecca Schultz Zavin <rebecca@...roid.com>,
	Dima Zavin <dima@...roid.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 17/20] video: msm: Prevent framebuffer glitch during	initialization

Hello.

Carl Vanderlip wrote:

> Holds a reference to the mdp_clk until lateinit, and moves the frambuffer
> initialization to device_init.

    Maybe I'm just blind but I don't see where the patch does the latter...

> The framebuffer lcdc driver will grab a
> reference to mdp_clk, which prevents the clock from being disabled by
> clock_late_init.

> Authors:
> Dima Zavin <dima@...roid.com>
> Rebecca Schultz Zavin <rebecca@...roid.com>
> Colin Cross <ccross@...roid.com>

> Signed-off-by: Carl Vanderlip <carlv@...eaurora.org>
> ---
>  drivers/video/msm/mdp.c |   10 ++++++++++
>  1 files changed, 10 insertions(+), 0 deletions(-)

> diff --git a/drivers/video/msm/mdp.c b/drivers/video/msm/mdp.c
> index 0bb19fa..b3f334ad 100644
> --- a/drivers/video/msm/mdp.c
> +++ b/drivers/video/msm/mdp.c
> @@ -38,6 +38,7 @@ struct class *mdp_class;
>  
>  static DECLARE_WAIT_QUEUE_HEAD(mdp_ppp_waitqueue);
>  static unsigned int mdp_irq_mask;
> +struct clk *mdp_clk_to_disable_later;

    Why not just 'mdp_clk'? :-)

WBR, Sergei
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