From: Mahesh Kumar <mahesh1.kumar@intel.com>
Date: Tue, 30 Jan 2018 11:49:10 -0200
Subject: drm/i915/icl: Don't allocate fixed bypass path blocks for ICL
Git-commit: 9a9e3dfd6f8bff68434b9c5e1a3aa88f83a612ad
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
GEN9 onwards bypass path allocation of 4 blocks was needed, as per
hardware design. ICL doesn't require bypass path allocation of 4 DDB
blocks, handling the same in this patch.
v2 (from Paulo):
- No need for a comment that says what the code already says.
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: James Ausmus <james.ausmus@intel.com>
Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180130134918.32283-2-paulo.r.zanoni@intel.com
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/intel_pm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3778,7 +3778,8 @@ skl_ddb_get_pipe_allocation_limits(struc
ddb_size = INTEL_INFO(dev_priv)->ddb_size;
WARN_ON(ddb_size == 0);
- ddb_size -= 4; /* 4 blocks for bypass path allocation */
+ if (INTEL_GEN(dev_priv) < 11)
+ ddb_size -= 4; /* 4 blocks for bypass path allocation */
/*
* If the state doesn't change the active CRTC's, then there's