[PATCH] radeonfb: Add quirk for the graphics adapter in some JSxx

[Jingoo Han]

On Thursday, July 19, 2012 1:49 AM, olaf at aepfle.de wrote:
> From: Tony Breeds <tony at bakeyournoodle.com>
> 
> These devices are set to 640x480 by firmware, switch them to 800x600 at 60
> so that the graphical installer can run on remote console.
> 
> Reported by IBM during SLES10 SP2 beta testing:
> 
> https://bugzilla.novell.com/show_bug.cgi?id=461002
> LTC50817
> 
> Signed-off-by: Olaf Hering <olaf at aepfle.de>

If the author is Tony Breeds, please add 'Signed-off-by: Tony Breeds <tony at bakeyournoodle.com>'.

Best regards,
Jingoo Han

> 
> diff --git a/drivers/video/aty/radeon_monitor.c b/drivers/video/aty/radeon_monitor.c
> index 9261c91..5c23eac 100644
> --- a/drivers/video/aty/radeon_monitor.c
> +++ b/drivers/video/aty/radeon_monitor.c
> @@ -730,6 +730,25 @@ static void radeon_videomode_to_var(struct fb_var_screeninfo *var,
>  	var->vmode = mode->vmode;
>  }
> 
> +#ifdef CONFIG_PPC_PSERIES
> +static int is_powerblade(const char *model)
> +{
> +	struct device_node *root;
> +	const char* cp;
> +	int len, l, rc = 0;
> +
> +	root = of_find_node_by_path("/");
> +	if (root && model) {
> +		l = strlen(model);
> +		cp = of_get_property(root, "model", &len);
> +		if (cp)
> +			rc = memcmp(model, cp, min(len, l)) == 0;
> +		of_node_put(root);
> +	}
> +	return rc;
> +}
> +#endif
> +
>  /*
>   * Build the modedb for head 1 (head 2 will come later), check panel infos
>   * from either BIOS or EDID, and pick up the default mode
> @@ -865,6 +884,22 @@ void __devinit radeon_check_modes(struct radeonfb_info *rinfo, const char *mode_
>  			has_default_mode = 1;
>   	}
> 
> +#ifdef CONFIG_PPC_PSERIES
> +	if (!has_default_mode && (
> +		is_powerblade("IBM,8842") || /* JS20 */
> +		is_powerblade("IBM,8844") || /* JS21 */
> +		is_powerblade("IBM,7998") || /* JS12/JS21/JS22 */
> +		is_powerblade("IBM,0792") || /* QS21 */
> +		is_powerblade("IBM,0793")    /* QS22 */
> +	    )) {
> +		printk("Falling back to 800x600 on JSxx hardware\n");
> +		if (fb_find_mode(&info->var, info, "800x600 at 60",
> +				 info->monspecs.modedb,
> +				 info->monspecs.modedb_len, NULL, 8) != 0)
> +			has_default_mode = 1;
> +	}
> +#endif
> +
>  	/*
>  	 * Still no mode, let's pick up a default from the db
>  	 */
> --
> 1.7.10.4
> 
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