disp: msm: sde: dynamic lm reservation for secondary disp

Primary and secondary displays should have first priority
when reserving lms. Static reservation can potentially block
higher resolutions for the required displays. This patch gets
the layer mixer requirement for primary or secondary display
if available. It reserves those layer mixers dynamically
for the respective display when connector is registered.

Change-Id: Id69dac4c72d6b20008049f4aeb71c0f97d0a426b
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>

msm/sde/sde_connector.c

@@ -1533,8 +1533,8 @@ int sde_connector_helper_reset_custom_properties(
 	return 0;
 }
 
-static int _sde_connector_primary_preference(struct sde_connector *sde_conn,
-		struct sde_kms *sde_kms)
+static int _sde_connector_lm_preference(struct sde_connector *sde_conn,
+		 struct sde_kms *sde_kms, uint32_t disp_type)
 {
 	int ret = 0;
 	u32 num_lm = 0;
@@ -1544,6 +1544,11 @@ static int _sde_connector_primary_preference(struct sde_connector *sde_conn,
 		return -EINVAL;
 	}
 
+	if (!disp_type || disp_type >= SDE_CONNECTOR_MAX) {
+		SDE_DEBUG("invalid display_type");
+		return -EINVAL;
+	}
+
 	ret = sde_conn->ops.get_default_lms(sde_conn->display, &num_lm);
 	if (ret || !num_lm) {
 		SDE_DEBUG("failed to get default lm count");
@@ -1557,7 +1562,7 @@ static int _sde_connector_primary_preference(struct sde_connector *sde_conn,
 		return -EINVAL;
 	}
 
-	sde_hw_mixer_set_preference(sde_kms->catalog, num_lm);
+	sde_hw_mixer_set_preference(sde_kms->catalog, num_lm, disp_type);
 
 	return ret;
 }
@@ -2453,8 +2458,8 @@ struct drm_connector *sde_connector_init(struct drm_device *dev,
 		goto error_destroy_property;
 	}
 
-	if (display_info.is_primary)
-		_sde_connector_primary_preference(c_conn, sde_kms);
+	_sde_connector_lm_preference(c_conn, sde_kms,
+			display_info.display_type);
 
 	SDE_DEBUG("connector %d attach encoder %d\n",
 			c_conn->base.base.id, encoder->base.id);