disp: msm: sde: add helper api to check executing VM

Adds a DT property to indicate trusted VM execution
environment and support catalog parsing for the same.
Add helper API to read the value.

Change-Id: I9194618b6f080119f1f15271a9b3c7edf938ca08
Signed-off-by: Jeykumar Sankaran <[email protected]>

msm/sde/sde_hw_catalog.c

@@ -201,6 +201,7 @@ enum sde_prop {
 	PIPE_ORDER_VERSION,
 	SEC_SID_MASK,
 	BASE_LAYER,
+	TRUSTED_VM_ENV,
 	SDE_PROP_MAX,
 };
 
@@ -571,6 +572,7 @@ static struct sde_prop_type sde_prop[] = {
 			PROP_TYPE_U32},
 	{SEC_SID_MASK, "qcom,sde-secure-sid-mask", false, PROP_TYPE_U32_ARRAY},
 	{BASE_LAYER, "qcom,sde-mixer-stage-base-layer", false, PROP_TYPE_BOOL},
+	{TRUSTED_VM_ENV, "qcom,sde-trusted-vm-env", false, PROP_TYPE_BOOL},
 };
 
 static struct sde_prop_type sde_perf_prop[] = {
@@ -3733,6 +3735,8 @@ static void _sde_top_parse_dt_helper(struct sde_mdss_cfg *cfg,
 	cfg->has_base_layer = PROP_VALUE_ACCESS(props->values, BASE_LAYER, 0);
 	cfg->qseed_hw_version = PROP_VALUE_ACCESS(props->values,
 			 QSEED_HW_VERSION, 0);
+	cfg->trusted_vm_env = PROP_VALUE_ACCESS(props->values, TRUSTED_VM_ENV,
+			 0);
 }
 
 static int sde_top_parse_dt(struct device_node *np, struct sde_mdss_cfg *cfg)

msm/sde/sde_hw_catalog.h

@@ -1360,6 +1360,8 @@ struct sde_perf_cfg {
  * this HW version. Contains number of instances,
  * register offsets, capabilities of the all MDSS HW sub-blocks.
  *
+ * @trusted_vm_env	set to true, if the driver is executing in
+ *			the trusted VM. false, otherwise.
  * @max_sspp_linewidth max source pipe line width support.
  * @vig_sspp_linewidth max vig source pipe line width support.
  * @scaling_linewidth max vig source pipe linewidth for scaling usecases
@@ -1432,6 +1434,7 @@ struct sde_perf_cfg {
  */
 struct sde_mdss_cfg {
 	u32 hwversion;
+	bool trusted_vm_env;
 
 	u32 max_sspp_linewidth;
 	u32 vig_sspp_linewidth;

msm/sde/sde_kms.h

@@ -642,6 +642,19 @@ static inline bool sde_kms_rect_is_null(const struct sde_rect *r)
 	return (!r->w || !r->h);
 }
 
+/*
+ * sde_in_trusted_vm - checks the executing VM
+ * return: true, if the device driver is executing in the trusted VM
+ *         false, if the device driver is executing in the primary VM
+ */
+static inline bool sde_in_trusted_vm(const struct sde_kms *sde_kms)
+{
+	if (sde_kms && sde_kms->catalog)
+		return sde_kms->catalog->trusted_vm_env;
+
+	return false;
+}
+
 /**
  * Vblank enable/disable functions
  */