[PATCH] drm/edid: shorten log output in case of all zeroes edid block

[Jani Nikula]

On Thu, 20 Nov 2014, Stefan Brüns <stefan.bruens at rwth-aachen.de> wrote:
> There is no need to dump the whole EDID block in case it contains no
> information. Just print a single line stating the block is empty instead
> of 8 lines containing only zeroes.
>
> Signed-off-by: Stefan Brüns <stefan.bruens at rwth-aachen.de>

Reviewed-by: Jani Nikula <jani.nikula at intel.com>

> ---
>  drivers/gpu/drm/drm_edid.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 3bf9991..ec4f91f 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -1080,9 +1080,13 @@ bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid)
>  
>  bad:
>  	if (print_bad_edid) {
> -		printk(KERN_ERR "Raw EDID:\n");
> -		print_hex_dump(KERN_ERR, " \t", DUMP_PREFIX_NONE, 16, 1,
> +		if (drm_edid_is_zero(raw_edid, EDID_LENGTH)) {
> +			printk(KERN_ERR "EDID block is all zeroes\n");
> +		} else {
> +			printk(KERN_ERR "Raw EDID:\n");
> +			print_hex_dump(KERN_ERR, " \t", DUMP_PREFIX_NONE, 16, 1,
>  			       raw_edid, EDID_LENGTH, false);
> +		}
>  	}
>  	return false;
>  }
> -- 
> 2.1.2
>
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-- 
Jani Nikula, Intel Open Source Technology Center