[Intel-gfx] [PATCH] drm/i915: Enable 5.4Ghz (HBR2) link rate for Displayport 1.2-capable devices

[Damien Lespiau]

On Thu, Jan 16, 2014 at 08:06:08PM -0700, Todd Previte wrote:
> For HSW+ platforms, enable the 5.4Ghz (HBR2) link rate for devices that support it. The
> sink device must report that is supports Displayport 1.2 and the HBR2 bit rate in the
> DPCD in order to use HBR2.
> ---
>  drivers/gpu/drm/i915/intel_dp.c | 21 +++++++++++++++------
>  1 file changed, 15 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 7df5085..f92d1c0 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -102,7 +102,10 @@ intel_dp_max_link_bw(struct intel_dp *intel_dp)
>  	case DP_LINK_BW_2_7:
>  		break;
>  	case DP_LINK_BW_5_4: /* 1.2 capable displays may advertise higher bw */
> -		max_link_bw = DP_LINK_BW_2_7;
> +        if (intel_dp->dpcd[DP_DPCD_REV] == 0x12)
> +            max_link_bw = DP_LINK_BW_5_4;
> +        else
> +            max_link_bw = DP_LINK_BW_2_7;
>  		break;

I see spaces instead of tabs. You can use the useful checkpatch.pl
script on patches to catch those pesky style issues (from within a linux
tree):

$ ./scripts/checkpatch.pl 0001-drm-i915-Enable-5.4Ghz-HBR2-link-rate-for-Displaypor.patch

[...]

total: 6 errors, 9 warnings, 55 lines checked

-- 
Damien