From 7a40aac1d77ab05ca375ac34de44e7972cc61dc3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= <jose.souza@intel.com>
Date: Fri, 25 Oct 2019 17:13:21 -0700
Subject: drm/i915/display: Check if FBC is fused off
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Git-commit: 7a40aac1d77ab05ca375ac34de44e7972cc61dc3
Patch-mainline: v5.5-rc1
References: bsc#1152489
Check if FBC is fused off and handle it.
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Martin Peres <martin.peres@linux.intel.com>
Reviewed-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191026001323.216052-3-jose.souza@intel.com
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/i915/i915_reg.h | 1 +
drivers/gpu/drm/i915/intel_device_info.c | 3 +++
2 files changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index d90adf02e0a5..ecbcc0e33850 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7743,6 +7743,7 @@ enum {
#define CNL_DDI_CLOCK_REG_ACCESS_ON (1 << 7)
#define SKL_DFSM _MMIO(0x51000)
+#define SKL_DFSM_DISPLAY_PM_DISABLE (1 << 27)
#define SKL_DFSM_DISPLAY_HDCP_DISABLE (1 << 25)
#define SKL_DFSM_CDCLK_LIMIT_MASK (3 << 23)
#define SKL_DFSM_CDCLK_LIMIT_675 (0 << 23)
diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index e7dd6092c105..a3e90714cfa2 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -984,6 +984,9 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
if (dfsm & SKL_DFSM_DISPLAY_HDCP_DISABLE)
info->display.has_hdcp = 0;
+
+ if (dfsm & SKL_DFSM_DISPLAY_PM_DISABLE)
+ info->display.has_fbc = 0;
}
/* Initialize slice/subslice/EU info */
--
2.28.0