diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 9e765462ca44..60febfb33154 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6032,6 +6032,9 @@ enum { #define IVB_CURSOR_B_OFFSET 0x71080 #define IVB_CURSOR_C_OFFSET 0x72080 +#define _CUR_SURLIVE 0x700AC +#define CUR_SURLIVE(pipe) _CURSOR2(pipe, _CUR_SURLIVE) + /* Display A control */ #define _DSPACNTR 0x70180 #define DISPLAY_PLANE_ENABLE (1<<31) diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c index 23175c5c4a50..975ebb51c7af 100644 --- a/drivers/gpu/drm/i915/intel_psr.c +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -1027,8 +1027,23 @@ void intel_psr_flush(struct drm_i915_private *dev_priv, dev_priv->psr.busy_frontbuffer_bits &= ~frontbuffer_bits; /* By definition flush = invalidate + flush */ - if (frontbuffer_bits) - intel_psr_exit(dev_priv); + if (frontbuffer_bits) { + if (dev_priv->psr.psr2_support || + IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { + intel_psr_exit(dev_priv); + } else { + /* + * Display WA #0884: all + * This documented WA for bxt can be safely applied + * broadly so we can force HW tracking to exit PSR + * instead of disabling and re-enabling. + * Workaround tells us to write 0 to CUR_SURLIVE_A, + * but it makes more sense write to the current active + * pipe. + */ + I915_WRITE(CUR_SURLIVE(pipe), 0); + } + } if (!dev_priv->psr.active && !dev_priv->psr.busy_frontbuffer_bits) if (!work_busy(&dev_priv->psr.work.work))