Re: [Intel-gfx] force DP lane count on Broadwell platform

2016-05-18 Thread Jani Nikula
On Wed, 18 May 2016, "Sanchez, AdolfoX" wrote: > A customer of mine decided to work with a modified DP port with only > two lanes and is facing issues. I guess modifying the suggested > values might be useful at O.S leve, however I was wondering if > modifyint the register that I mentioned earli

Re: [Intel-gfx] force DP lane count on Broadwell platform

2016-05-18 Thread Sanchez, AdolfoX
same for the pre-OS stage. Best Regards, Adolfo Sanchez -Original Message- From: Jani Nikula [mailto:jani.nik...@linux.intel.com] Sent: Wednesday, May 18, 2016 12:38 AM To: Sanchez, AdolfoX ; intel-gfx@lists.freedesktop.org Subject: Re: [Intel-gfx] force DP lane count on Broadwell platform

Re: [Intel-gfx] force DP lane count on Broadwell platform

2016-05-17 Thread Jani Nikula
On Wed, 18 May 2016, "Sanchez, AdolfoX" wrote: > What PRM registers should be modified to force the source lanes to > report 2 lanes maximum? Is it enough to modify the registers > DP_TP_CTL and DDI_BUF_CTL, or should any other register be modified? You should probably look at intel_ddi_init() i

[Intel-gfx] force DP lane count on Broadwell platform

2016-05-17 Thread Sanchez, AdolfoX
Hello What PRM registers should be modified to force the source lanes to report 2 lanes maximum? Is it enough to modify the registers DP_TP_CTL and DDI_BUF_CTL, or should any other register be modified? Best Regards, Adolfo Sanchez. ___ Intel-gfx mail