[Intel-gfx] [PATCH v2] drm/i915/skl: Implement WaDisableHBR2

[Jani Nikula]

On Thu, 12 Mar 2015, Jesse Barnes <jbarnes at virtuousgeek.org> wrote:
> On 02/11/2015 09:43 AM, Damien Lespiau wrote:
>> v2: Use the recently introduced INTEL_REVID() and SKL_REVID defines
>>     (Nick Hoath)
>> 
>> Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
>> ---
>>  drivers/gpu/drm/i915/intel_dp.c | 5 ++++-
>>  1 file changed, 4 insertions(+), 1 deletion(-)
>> 
>> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
>> index d4c82d7..a7bc3e8 100644
>> --- a/drivers/gpu/drm/i915/intel_dp.c
>> +++ b/drivers/gpu/drm/i915/intel_dp.c
>> @@ -129,7 +129,10 @@ 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 */
>> -		if (((IS_HASWELL(dev) && !IS_HSW_ULX(dev)) ||
>> +		if (IS_SKYLAKE(dev) && INTEL_REVID(dev) <= SKL_REVID_B0)
>> +			/* WaDisableHBR2:skl */
>> +			max_link_bw = DP_LINK_BW_2_7;
>> +		else if (((IS_HASWELL(dev) && !IS_HSW_ULX(dev)) ||
>>  		     INTEL_INFO(dev)->gen >= 8) &&
>>  		    intel_dp->dpcd[DP_DPCD_REV] >= 0x12)
>>  			max_link_bw = DP_LINK_BW_5_4;
>> 
>
> Reviewed-by: Jesse Barnes <jbarnes at virtuousgeek.org>
> Tested-by: Jesse Barnes <jbarnes at virtuousgeek.org>

Potentially

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89554


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-- 
Jani Nikula, Intel Open Source Technology Center