disp: msm: use FB_NON_SEC_DIR_TRANS plane hint for TUI VM buffers

Add plane buffer flag to get the correct aspace during
TUI VM usecase. FB_NON_SEC_DIR_TRANS plane flag is set
by user-mode to indicate S2-only non-secure buffer in
TUI VM. Return the default drm device when SMMU is not
available during get_aspace_device to make the working
seamless with/without SMMU.

Change-Id: I158dc17ba51ff4b2f302d3e7017db8ab3cfe2b84
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>

msm/msm_gem.c

@@ -1259,12 +1259,6 @@ struct drm_gem_object *msm_gem_import(struct drm_device *dev,
 	int ret;
 	unsigned long flags = 0;
 
-	/* if we don't have IOMMU, don't bother pretending we can import: */
-	if (!iommu_present(&platform_bus_type)) {
-		dev_err(dev->dev, "cannot import without IOMMU\n");
-		return ERR_PTR(-EINVAL);
-	}
-
 	size = PAGE_ALIGN(dmabuf->size);
 
 	ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj,

msm/sde/sde_crtc.c

@@ -1726,6 +1726,8 @@ int sde_crtc_find_plane_fb_modes(struct drm_crtc *crtc,
 		case SDE_DRM_FB_SEC_DIR_TRANS:
 			(*fb_sec_dir)++;
 			break;
+		case SDE_DRM_FB_NON_SEC_DIR_TRANS:
+			break;
 		default:
 			SDE_ERROR("Error: Plane[%d], fb_trans_mode:%d",
 					DRMID(plane), mode);
@@ -1773,6 +1775,8 @@ int sde_crtc_state_find_plane_fb_modes(struct drm_crtc_state *state,
 		case SDE_DRM_FB_SEC_DIR_TRANS:
 			(*fb_sec_dir)++;
 			break;
+		case SDE_DRM_FB_NON_SEC_DIR_TRANS:
+			break;
 		default:
 			SDE_ERROR("Error: Plane[%d], fb_trans_mode:%d",
 					DRMID(plane), mode);
@@ -1927,6 +1931,10 @@ int sde_crtc_get_secure_transition_ops(struct drm_crtc *crtc,
 				old_valid_fb, post_commit, &ops);
 		break;
 
+	case SDE_DRM_FB_NON_SEC_DIR_TRANS:
+		ops = 0;
+		break;
+
 	default:
 		SDE_ERROR("crtc%d: invalid plane fb_mode %d\n",
 				DRMID(crtc), translation_mode);

msm/sde/sde_kms.c

@@ -2147,11 +2147,31 @@ _sde_kms_get_address_space(struct msm_kms *kms,
 static struct device *_sde_kms_get_address_space_device(struct msm_kms *kms,
 		unsigned int domain)
 {
-	struct msm_gem_address_space *aspace =
+	struct sde_kms *sde_kms;
-		_sde_kms_get_address_space(kms, domain);
+	struct device *dev;
+	struct msm_gem_address_space *aspace;
 
-	return (aspace && aspace->domain_attached) ?
+	if (!kms) {
-			msm_gem_get_aspace_device(aspace) : NULL;
+		SDE_ERROR("invalid kms\n");
+		return  NULL;
+	}
+
+	sde_kms = to_sde_kms(kms);
+	if (!sde_kms || !sde_kms->dev || !sde_kms->dev->dev) {
+		SDE_ERROR("invalid params\n");
+		return NULL;
+	}
+
+	/* return default device, when IOMMU is not present */
+	if (!iommu_present(&platform_bus_type)) {
+		dev = sde_kms->dev->dev;
+	} else {
+		aspace = _sde_kms_get_address_space(kms, domain);
+		dev =  (aspace && aspace->domain_attached) ?
+				msm_gem_get_aspace_device(aspace) : NULL;
+	}
+
+	return dev;
 }
 
 static void _sde_kms_post_open(struct msm_kms *kms, struct drm_file *file)

msm/sde/sde_plane.c

@@ -701,6 +701,7 @@ static int _sde_plane_get_aspace(
 		if (!aspace)
 			return -EINVAL;
 		break;
+	case SDE_DRM_FB_NON_SEC_DIR_TRANS:
 	case SDE_DRM_FB_SEC_DIR_TRANS:
 		*aspace = NULL;
 		break;