From cbb6ea8c6841f172efcf794bc5b2c70cb3c3f249 Mon Sep 17 00:00:00 2001
From: Anshuman Gupta <anshuman.gupta@intel.com>
Date: Wed, 14 Oct 2020 12:19:35 -0700
Subject: [PATCH] drm/i915/dg1: DG1 does not support DC6
DC6 is not supported on DG1, so change the allowed DC mask for DG1.
This is not yet on bspec, but it has been confirmed by HW engineers.
Cc: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201014191937.1266226-9-lucas.demarchi@intel.com
---
drivers/gpu/drm/i915/display/intel_display_power.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 18af078c208b7..45806cfc679aa 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -4492,7 +4492,10 @@ static u32 get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
int max_dc;
if (INTEL_GEN(dev_priv) >= 12) {
- max_dc = 4;
+ if (IS_DG1(dev_priv))
+ max_dc = 3;
+ else
+ max_dc = 4;
/*
* DC9 has a separate HW flow from the rest of the DC states,
* not depending on the DMC firmware. It's needed by system
--
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