drm/i915/display: Handle fused off HDCP

HDCP could be fused off, so not all GEN9+ platforms will support 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>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191026001323.216052-2-jose.souza@intel.com

drivers/gpu/drm/i915/display/intel_hdcp.c

@@ -922,7 +922,7 @@ static void intel_hdcp_prop_work(struct work_struct *work)
 bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port)
 {
 	/* PORT E doesn't have HDCP, and PORT F is disabled */
-	return INTEL_GEN(dev_priv) >= 9 && port < PORT_E;
+	return INTEL_INFO(dev_priv)->display.has_hdcp && port < PORT_E;
 }
 
 static int

drivers/gpu/drm/i915/i915_pci.c

@@ -612,6 +612,7 @@ static const struct intel_device_info intel_cherryview_info = {
 	.has_logical_ring_preemption = 1, \
 	.display.has_csr = 1, \
 	.has_gt_uc = 1, \
+	.display.has_hdcp = 1, \
 	.display.has_ipc = 1, \
 	.ddb_size = 896
 
@@ -655,6 +656,7 @@ static const struct intel_device_info intel_skylake_gt4_info = {
 	.display.has_ddi = 1, \
 	.has_fpga_dbg = 1, \
 	.display.has_fbc = 1, \
+	.display.has_hdcp = 1, \
 	.display.has_psr = 1, \
 	.has_runtime_pm = 1, \
 	.display.has_csr = 1, \

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_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)

drivers/gpu/drm/i915/intel_device_info.c

@@ -981,6 +981,9 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
 				  enabled_mask);
 		else
 			info->pipe_mask = enabled_mask;
+
+		if (dfsm & SKL_DFSM_DISPLAY_HDCP_DISABLE)
+			info->display.has_hdcp = 0;
 	}
 
 	/* Initialize slice/subslice/EU info */

drivers/gpu/drm/i915/intel_device_info.h

@@ -139,6 +139,7 @@ enum intel_ppgtt_type {
 	func(has_dsb); \
 	func(has_fbc); \
 	func(has_gmch); \
+	func(has_hdcp); \
 	func(has_hotplug); \
 	func(has_ipc); \
 	func(has_modular_fia); \