[PATCH 3/3] drm/i915/display: Check if FBC and DMC are fused off

[José Roberto de Souza]

Those features could be fused off on GEN9 non-low power and newer
GENs.

Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h          | 2 ++
 drivers/gpu/drm/i915/intel_device_info.c | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 6cd63329101f..2f53b47d04bc 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7644,12 +7644,14 @@ enum {
 
 #define SKL_DFSM			_MMIO(0x51000)
 #define SKL_DFSM_INTERNAL_DISPLAY_DISABLE (1 << 30)
+#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)
 #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 881e006b5198..894f1e7e1af3 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -990,6 +990,12 @@ 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;
+
+		if (INTEL_GEN(dev_priv) >= 11 && (dfsm & ICL_DFSM_DMC_DISABLE))
+			info->display.has_csr = 0;
 	}
 
 	/* Initialize slice/subslice/EU info */
-- 
2.23.0