Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/i915/psr: Do not unnecessarily remove underrun on idle PSR WA
We are currently removing underrun on idle PSR WA even if it's not
applied. Fix this by checking pkg_c_latency_used on PSR exit as well.
Fixes: 9b1795e9b0ae ("drm/i915/psr: Underrun on idle PSR wa only when pkgc latency > delayed vblank")
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Link: https://lore.kernel.org/r/20250822105846.1023631-1-jouni.hogander@intel.com
+3
-2
+3
-2
drivers/gpu/drm/i915/display/intel_psr.c
+3
-2
drivers/gpu/drm/i915/display/intel_psr.c
···
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2095
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drm_WARN_ON(display->drm, !(val & EDP_PSR2_ENABLE));
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} else {
2098
-
if (DISPLAY_VER(display) == 20 ||
2099
-
IS_DISPLAY_VERx100_STEP(display, 3000, STEP_A0, STEP_B0))
2098
+
if ((DISPLAY_VER(display) == 20 ||
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+
IS_DISPLAY_VERx100_STEP(display, 3000, STEP_A0, STEP_B0)) &&
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+
intel_dp->psr.pkg_c_latency_used)
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intel_dmc_start_pkgc_exit_at_start_of_undelayed_vblank(display,
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intel_dp->psr.pipe,
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false);