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

[Todd Previte]

On 1/17/2014 4:55 AM, Damien Lespiau wrote:
> 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
>
Gah. That's what happens when I make changes with different editors. 
I'll fix those in the next revision.

-T