Re: [Intel-gfx] [v6] drm/i915/display: Enable DP Display Audio WA

2020-04-17 Thread Chris Wilson
Quoting Shankar, Uma (2020-04-17 12:49:21) > > > > -Original Message- > > From: Shankar, Uma > > Sent: Thursday, April 16, 2020 4:24 PM > > To: intel-gfx@lists.freedesktop.org > > Cc: Vehmanen, Kai ; Gupta, Anshuman > > ; jani.nik...@linux.intel.com; Shankar, Uma > > > > Subject: [v6] d

Re: [Intel-gfx] [v6] drm/i915/display: Enable DP Display Audio WA

2020-04-17 Thread Shankar, Uma
> -Original Message- > From: Shankar, Uma > Sent: Thursday, April 16, 2020 4:24 PM > To: intel-gfx@lists.freedesktop.org > Cc: Vehmanen, Kai ; Gupta, Anshuman > ; jani.nik...@linux.intel.com; Shankar, Uma > > Subject: [v6] drm/i915/display: Enable DP Display Audio WA > > For certain D

[Intel-gfx] [v6] drm/i915/display: Enable DP Display Audio WA

2020-04-16 Thread Uma Shankar
For certain DP VDSC bpp settings, hblank asserts before hblank_early, leading to a bad audio state. Driver need to program "hblank early enable" and "samples per line" parameters in AUDIO_CONFIG_BE register. This is Display Audio WA #1406928334 for 4k+VDSC usecase applicable on DP encoders. Implem