linux-kernel - Re: [PATCH 3/3] staging: sm7xxfb: change return of sm7xx_vga

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Message-ID: <20150309140414.GA11015@mwanda>
Date:	Mon, 9 Mar 2015 17:04:14 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	devel@...verdev.osuosl.org, linux-fbdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] staging: sm7xxfb: change return of sm7xx_vga_setup

On Mon, Mar 09, 2015 at 07:23:43PM +0530, Sudip Mukherjee wrote:
> On Mon, Mar 09, 2015 at 04:38:05PM +0300, Dan Carpenter wrote:
> > 
> > 
> > On Mon, Mar 09, 2015 at 07:00:33PM +0530, Sudip Mukherjee wrote:
> > > On Mon, Mar 09, 2015 at 04:13:43PM +0300, Dan Carpenter wrote:
> > > > On Sun, Mar 08, 2015 at 11:10:11PM +0530, Sudip Mukherjee wrote:
> > > > > change return type of sm7xx_vga_setup() to void as we are not using
> > > > > the return type anywhere. if this function fails we fall back to the
> > > > > default configuration.
> > > > > 
> > > > > Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
> > > > 
> > > > Reviewed-by: Dan Carpenter <dan.carpenter@...cle.com>
> > > > 
> > > > This patch is fine but if you wanted you could send a follow on which
> > > > set it to SCREEN_X_RES, SCREEN_Y_RES, SCREEN_BPP if there were no
> > > > options.  Then remove the "if (smtc_scr_info.lfb_width != 0) " condition
> > > > in smtcfb_pci_probe().
> > > 
> > > yes, i could have. But actually I am thinking to totally remove this function and use more conventional fb_get_mode() in its places. But if i do so then the boot parameters will change. Currently it is like vga=sm712fb:0x301 but if i change it to use fb_get_mode() then the boot parameters will change to vga=sm712fb:640x480@...8 , and that is why I am hesitating. But it will be more conventional to what all framebuffer drivers follows.
> > > 
> > 
> > Hm...  That's a good question.
> > 
> > I suspect we should just go with fb_get_mode() and do it quickly.  This
> > driver is so new in the kernel that there are no users to get upset.
>
> i am afraid that is not correct. this driver was in staging from long
> back, and Greg removed it from staging as no one was working with it.
> But after that removal Lemote Yeeloong laptop of Steven Rostedt
> stopped working. (https://lkml.org/lkml/2014/11/20/698) , so i guess
> there will be many such users.

Hm...  I suspect we should still change it so it matches the other FB
drivers but I don't know.

Perhaps Greg has an opinion?

regards,
dan carpenter

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