drm/i915/psr: Add enable_panel_replay module parameter

Add new module parameter enable_panel_replay. This can be used to
enable/disable Panel Replay. 0=disabled, 1=enabled. -1=use per-chip default
(default).

Signed-off-by: Jouni Högander <[e-mail]>
Reviewed-by: Rodrigo Vivi <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/gpu/drm/i915/display/intel_display_params.c

···
 	"(0=disabled, 1=enable up to PSR1, 2=enable up to PSR2) "
 	"Default: -1 (use per-chip default)");
 
+intel_display_param_named_unsafe(enable_panel_replay, int, 0400,
+	"Enable Panel Replay (0=disabled, 1=enabled). Default: -1 (use per-chip default)");
+
 intel_display_param_named(psr_safest_params, bool, 0400,
 	"Replace PSR VBT parameters by the safest and not optimal ones. This "
 	"is helpful to detect if PSR issues are related to bad values set in "

drivers/gpu/drm/i915/display/intel_display_params.h

···
 	param(bool, enable_dp_mst, true, 0600) \
 	param(int, enable_fbc, -1, 0600) \
 	param(int, enable_psr, -1, 0600) \
+	param(int, enable_panel_replay, -1, 0600) \
 	param(bool, psr_safest_params, false, 0400) \
 	param(bool, enable_psr2_sel_fetch, true, 0400) \
 	param(int, enable_dmc_wl, -1, 0400) \

drivers/gpu/drm/i915/display/intel_psr.c

···
 
 static bool panel_replay_global_enabled(struct intel_dp *intel_dp)
 {
-	return !(intel_dp->psr.debug & I915_PSR_DEBUG_PANEL_REPLAY_DISABLE);
+	struct intel_display *display = to_intel_display(intel_dp);
+
+	return !(intel_dp->psr.debug & I915_PSR_DEBUG_PANEL_REPLAY_DISABLE) &&
+		display->params.enable_panel_replay;
 }
 
 static u32 psr_irq_psr_error_bit_get(struct intel_dp *intel_dp)