From ee595888e1c25fb31bbc10a317a576311356babd 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 17:13:22 -0700
Subject: drm/i915/display/icl+: Check if DMC is fused off
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Git-commit: ee595888e1c25fb31bbc10a317a576311356babd
Patch-mainline: v5.5-rc1
References: bsc#1152489
Check if DMC 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/20191026001323.216052-4-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 ecbcc0e33850..32a5371fff4f 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7750,6 +7750,7 @@ enum {
#define SKL_DFSM_CDCLK_LIMIT_540 (1 << 23)
#define SKL_DFSM_CDCLK_LIMIT_450 (2 << 23)
#define SKL_DFSM_CDCLK_LIMIT_337_5 (3 << 23)
+#define ICL_DFSM_DMC_DISABLE (1 << 23)
#define SKL_DFSM_PIPE_A_DISABLE (1 << 30)
#define SKL_DFSM_PIPE_B_DISABLE (1 << 21)
#define SKL_DFSM_PIPE_C_DISABLE (1 << 28)
diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index a3e90714cfa2..fa6464879142 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -987,6 +987,9 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
if (dfsm & SKL_DFSM_DISPLAY_PM_DISABLE)
info->display.has_fbc = 0;
+
+ if (INTEL_GEN(dev_priv) >= 11 && (dfsm & ICL_DFSM_DMC_DISABLE))
+ info->display.has_csr = 0;
}
/* Initialize slice/subslice/EU info */
--
2.28.0