drm/i915/tgl: Check if pipe D is fused

On Tiger Lake there is one more pipe - check if it's fused.
Signed-off-by: NJosé Roberto de Souza <jose.souza@intel.com>
Signed-off-by: NLucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: NMika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190711173115.28296-7-lucas.demarchi@intel.com

drivers/gpu/drm/i915/i915_reg.h

@@ -7633,6 +7633,7 @@ enum {
 #define SKL_DFSM_PIPE_A_DISABLE		(1 << 30)
 #define SKL_DFSM_PIPE_B_DISABLE		(1 << 21)
 #define SKL_DFSM_PIPE_C_DISABLE		(1 << 28)
+#define TGL_DFSM_PIPE_D_DISABLE		(1 << 22)
 
 #define SKL_DSSM				_MMIO(0x51004)
 #define CNL_DSSM_CDCLK_PLL_REFCLK_24MHz		(1 << 31)

drivers/gpu/drm/i915/intel_device_info.c

@@ -938,6 +938,9 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
 			enabled_mask &= ~BIT(PIPE_B);
 		if (dfsm & SKL_DFSM_PIPE_C_DISABLE)
 			enabled_mask &= ~BIT(PIPE_C);
+		if (INTEL_GEN(dev_priv) >= 12 &&
+		    (dfsm & TGL_DFSM_PIPE_D_DISABLE))
+			enabled_mask &= ~BIT(PIPE_D);
 
 		/*
 		 * At least one pipe should be enabled and if there are