Commit a77c3fe3 authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm/i915/psr: Implement WaPsrDPAMaskVBlankInSRD:hsw 



Implement WaPsrDPAMaskVBlankInSRD:hsw, which makes the hardware
generate the extra vblank between link training and first frame
being transmitted. This is the same thing that's controlled by
TRANS_CHICKEN[21] on skl+ (but due to the funky double buffering
it's effectively always at the rest value after DC5 exit). So
for consistent behaviour we want every platform to generate said
vblank. BDW is already setting this up correctly.

Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230609141404.12729-9-ville.syrjala@linux.intel.com


Reviewed-by: default avatarJouni Högander <jouni.hogander@intel.com>
parent e8b883c1

drivers/gpu/drm/i915/intel_clock_gating.c

+3 −0
Original line number Diff line number Diff line
@@ -562,6 +562,9 @@ static void hsw_init_clock_gating(struct drm_i915_private *i915) 
	/* WaFbcAsynchFlipDisableFbcQueue:hsw,bdw */

	intel_uncore_rmw(&i915->uncore, CHICKEN_PIPESL_1(PIPE_A), 0, HSW_FBCQ_DIS);



	/* WaPsrDPAMaskVBlankInSRD:hsw */

	intel_uncore_rmw(&i915->uncore, CHICKEN_PAR1_1, 0, HSW_MASK_VBL_TO_PIPE_IN_SRD);



	/* This is required by WaCatErrorRejectionIssue:hsw */

	intel_uncore_rmw(&i915->uncore, GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,

			 0, GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);