To Sebastian Reichel: If this e-mail has the bizarre email address formatting issue you noticed in the last patch series I sent please let me know. I haven't gotten a chance to properly look at the e-mail you forwarded to me to see what's causing the problem, but I double checked the Cc: line for this e-mail manually before sending it out so hopefully I should be good for now…
Anyway, onto the actual patch series:
Unfortunately as a few of you are aware, Skylake is still very prone to pipe underruns. Most of this comes from not doing things atomically enough (e.g. needing to ensure that we update watermarks with other plane attributes, not forcefully flushing pipes until we need to, etc.). Now that I've finally got a grasp on how double buffered registers, arming registers, etc. works on skl, I've written up patches that fix all of the pipe underruns on Skylake I was able to reproduce.
Of course, one of the prerequisites for this patch series to actually fix all of the pipe underruns is the patch I previously submitted that added support for Skylake's SAGV.
Originally this patch series left behind the issue of running into pipe underruns when we disabled pipes, however I've now managed to fix that behavior as well. As such I've renamed the patch series appropriately instead of just incrementing the version.
Signed-off-by: Lyude cpaul@redhat.com Cc: stable@vger.kernel.org Cc: Ville Syrjälä ville.syrjala@linux.intel.com Cc: Daniel Vetter daniel.vetter@intel.com Cc: Radhakrishna Sripada radhakrishna.sripada@intel.com Cc: Hans de Goede hdegoede@redhat.com Cc: Matt Roper matthew.d.roper@intel.com
Lyude (5): drm/i915/skl: Update plane watermarks atomically during plane updates drm/i915/skl: Actually reuse wm values when pipes don't change drm/i915/skl: Always wait for pipes to update after a flush drm/i915/skl: Only flush pipes when we change the ddb allocation drm/i915/skl: Fix extra whitespace in skl_flush_wm_values()
Matt Roper (1): drm/i915/gen9: Only copy WM results for changed pipes to skl_hw
drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/intel_display.c | 5 ++ drivers/gpu/drm/i915/intel_drv.h | 2 + drivers/gpu/drm/i915/intel_pm.c | 133 +++++++++++++++++++++++++++++------ drivers/gpu/drm/i915/intel_sprite.c | 2 + 5 files changed, 120 insertions(+), 23 deletions(-)