Re: [PATCH 1/2]Freescale i.MX framebuffer driver

["Antonino A. Daplas" <adaplas@hotpop.com>]

On Saturday 19 March 2005 01:54, Sascha Hauer wrote:
> +/*
> + * imxfb_blank():
> + *	Blank the display by setting all palette values to zero.  Note, the
> + * 	12 and 16 bpp modes don't really use the palette, so this will not
> + *      blank the display in all modes.
> + */
> +static int imxfb_blank(int blank, struct fb_info *info)
> +{
> +	struct imxfb_info *fbi = info->par;
> +	int i;
> +
> +	pr_debug("imxfb_blank: blank=%d\n", blank);
> +
> +	switch (blank) {
> +	case FB_BLANK_POWERDOWN:
> +	case FB_BLANK_VSYNC_SUSPEND:
> +	case FB_BLANK_HSYNC_SUSPEND:
> +		if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR ||
> +		    info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
> +			for (i = 0; i < fbi->palette_size; i++)
> +				imxfb_setpalettereg(i, 0, 0, 0, 0, info);
> +		imxfb_disable_controller(fbi);
> +		break;
> +
> +	case FB_BLANK_UNBLANK:
> +		if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR ||
> +		    info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
> +			fb_set_cmap(&info->cmap, info);
> +		imxfb_enable_controller(fbi);
> +	}
> +	return 0;
> +}

FB_BLANK_NORMAL? It's actually important because FB_BLANK_UNBLANK and
FB_BLANK_NORMAL are commonly requested by fbcon. FB_BLANK_NORMAL is the case
where you need to blank the screen without turning off monitor sync signals,
ie, set cmap to all black but controller is still enabled.

Tony




-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now.
http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click