[PATCH 4/5] drm/i915/display/icl+: Check if DMC is fused off

[José Roberto de Souza]

Check if DMC is fused off and handle it.

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Martin Peres <martin.peres at linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 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 31375ddc2b3b..84fca4f3af5a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7660,6 +7660,7 @@ 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 b6a9f527f8f9..97d962944e48 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -993,6 +993,9 @@ 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 */
-- 
2.23.0