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Date:   Mon, 27 May 2019 08:13:06 +0200
From:   Daniel Vetter <daniel@ffwll.ch>
To:     Sam Ravnborg <sam@ravnborg.org>
Cc:     Daniel Vetter <daniel.vetter@ffwll.ch>,
        LKML <linux-kernel@vger.kernel.org>,
        Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        DRI Development <dri-devel@lists.freedesktop.org>
Subject: Re: [PATCH 11/33] fbdev/sh_mobile: remove
 sh_mobile_lcdc_display_notify
Message-ID: <20190527061306.GG21222@phenom.ffwll.local>
Mail-Followup-To: Sam Ravnborg <sam@ravnborg.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        DRI Development <dri-devel@lists.freedesktop.org>
References: <20190524085354.27411-1-daniel.vetter@ffwll.ch>
 <20190524085354.27411-12-daniel.vetter@ffwll.ch>
 <20190525150159.GA27341@ravnborg.org>
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On Sat, May 25, 2019 at 05:01:59PM +0200, Sam Ravnborg wrote:
> Hi Daniel
> 
> > It's dead code, and removing it avoids me having to understand
> > what it's doing with lock_fb_info.
> 
> I pushed the series through my build tests which include the sh
> architecture.
> 
> One error and one warning was triggered from sh_mobile_lcdcfb.c.
> The rest was fine.
> 
> The patch below removed the sole user of
> sh_mobile_lcdc_must_reconfigure() so this triggers a warning.
> 
> And I also get the following error:
> drivers/video/fbdev/sh_mobile_lcdcfb.c: In function ‘sh_mobile_fb_reconfig’:
> drivers/video/fbdev/sh_mobile_lcdcfb.c:1800:2: error: implicit declaration of function ‘fbcon_update_vcs’; did you mean ‘file_update_time’? [-Werror=implicit-function-declaration]
>   fbcon_update_vcs(info, true);
>   ^~~~~~~~~~~~~~~~
>   file_update_time
> 
> I did not check but assume the error was triggered in patch 28 where
> fbcon_update_vcs() in introduced.

Oops. Can I have your sob so I can squash this in?

Thanks, Daniel

> 
> 
> Both are trivially fixed by appended patch.
> 
> 	Sam
> 
> diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
> index bb1a610d0363..b8454424910d 100644
> --- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
> +++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
> @@ -15,6 +15,7 @@
>  #include <linux/ctype.h>
>  #include <linux/dma-mapping.h>
>  #include <linux/delay.h>
> +#include <linux/fbcon.h>
>  #include <linux/gpio.h>
>  #include <linux/init.h>
>  #include <linux/interrupt.h>
> @@ -533,25 +534,6 @@ static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
>  		ch->tx_dev->ops->display_off(ch->tx_dev);
>  }
>  
> -static bool
> -sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
> -				const struct fb_videomode *new_mode)
> -{
> -	dev_dbg(ch->info->dev, "Old %ux%u, new %ux%u\n",
> -		ch->display.mode.xres, ch->display.mode.yres,
> -		new_mode->xres, new_mode->yres);
> -
> -	/* It can be a different monitor with an equal video-mode */
> -	if (fb_mode_is_equal(&ch->display.mode, new_mode))
> -		return false;
> -
> -	dev_dbg(ch->info->dev, "Switching %u -> %u lines\n",
> -		ch->display.mode.yres, new_mode->yres);
> -	ch->display.mode = *new_mode;
> -
> -	return true;
> -}
> -
>  static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
>  				    struct fb_info *info);
>  
> 
>  
> > Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> > Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> > Cc: Geert Uytterhoeven <geert+renesas@glider.be>
> > Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> > ---
> >  drivers/video/fbdev/sh_mobile_lcdcfb.c | 63 --------------------------
> >  drivers/video/fbdev/sh_mobile_lcdcfb.h |  5 --
> >  2 files changed, 68 deletions(-)
> > 
> > diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
> > index dc46be38c970..c5924f5e98c6 100644
> > --- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
> > +++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
> > @@ -556,67 +556,6 @@ sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
> >  static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
> >  				    struct fb_info *info);
> >  
> > -static int sh_mobile_lcdc_display_notify(struct sh_mobile_lcdc_chan *ch,
> > -					 enum sh_mobile_lcdc_entity_event event,
> > -					 const struct fb_videomode *mode,
> > -					 const struct fb_monspecs *monspec)
> > -{
> > -	struct fb_info *info = ch->info;
> > -	struct fb_var_screeninfo var;
> > -	int ret = 0;
> > -
> > -	switch (event) {
> > -	case SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT:
> > -		/* HDMI plug in */
> > -		console_lock();
> > -		if (lock_fb_info(info)) {
> > -
> > -
> > -			ch->display.width = monspec->max_x * 10;
> > -			ch->display.height = monspec->max_y * 10;
> > -
> > -			if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
> > -			    info->state == FBINFO_STATE_RUNNING) {
> > -				/* First activation with the default monitor.
> > -				 * Just turn on, if we run a resume here, the
> > -				 * logo disappears.
> > -				 */
> > -				info->var.width = ch->display.width;
> > -				info->var.height = ch->display.height;
> > -				sh_mobile_lcdc_display_on(ch);
> > -			} else {
> > -				/* New monitor or have to wake up */
> > -				fb_set_suspend(info, 0);
> > -			}
> > -
> > -
> > -			unlock_fb_info(info);
> > -		}
> > -		console_unlock();
> > -		break;
> > -
> > -	case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
> > -		/* HDMI disconnect */
> > -		console_lock();
> > -		if (lock_fb_info(info)) {
> > -			fb_set_suspend(info, 1);
> > -			unlock_fb_info(info);
> > -		}
> > -		console_unlock();
> > -		break;
> > -
> > -	case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
> > -		/* Validate a proposed new mode */
> > -		fb_videomode_to_var(&var, mode);
> > -		var.bits_per_pixel = info->var.bits_per_pixel;
> > -		var.grayscale = info->var.grayscale;
> > -		ret = sh_mobile_lcdc_check_var(&var, info);
> > -		break;
> > -	}
> > -
> > -	return ret;
> > -}
> > -
> >  /* -----------------------------------------------------------------------------
> >   * Format helpers
> >   */
> > @@ -2540,8 +2479,6 @@ sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
> >  	unsigned int max_size;
> >  	unsigned int i;
> >  
> > -	ch->notify = sh_mobile_lcdc_display_notify;
> > -
> >  	/* Validate the format. */
> >  	format = sh_mobile_format_info(cfg->fourcc);
> >  	if (format == NULL) {
> > diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.h b/drivers/video/fbdev/sh_mobile_lcdcfb.h
> > index b8e47a8bd8ab..589400372098 100644
> > --- a/drivers/video/fbdev/sh_mobile_lcdcfb.h
> > +++ b/drivers/video/fbdev/sh_mobile_lcdcfb.h
> > @@ -87,11 +87,6 @@ struct sh_mobile_lcdc_chan {
> >  	unsigned long base_addr_c;
> >  	unsigned int line_size;
> >  
> > -	int (*notify)(struct sh_mobile_lcdc_chan *ch,
> > -		      enum sh_mobile_lcdc_entity_event event,
> > -		      const struct fb_videomode *mode,
> > -		      const struct fb_monspecs *monspec);
> > -
> >  	/* Backlight */
> >  	struct backlight_device *bl;
> >  	unsigned int bl_brightness;
> > -- 
> > 2.20.1
> > 
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch