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Commit 7d1fdf14 authored by Veera Sundaram Sankaran's avatar Veera Sundaram Sankaran
Browse files

drm: msm: attach devices to dma_buf based on ION flags 



Attach the appropriate secure/non-secure context-bank
device based on secure/non-secure buffers.
For secure-display and secure-camera-preview buffers,
attach it with the MDP device which does not have IOMMU.
These are direct S2-translation buffers and does not
require S1/S2 translations of IOMMU. This is required
as during the secure-camera-preview/secure-display usecases,
the secure-context bank is detached and might leave
the IOMMU ops in an unknown state.

Change-Id: I457865461e6b57fa90fa58884d78dc813ed5f7ec
Signed-off-by: default avatarVeera Sundaram Sankaran <veeras@codeaurora.org>
parent f5f31790

drivers/gpu/drm/msm/msm_gem_prime.c

+20 −5
Original line number Diff line number Diff line
@@ -128,11 +128,26 @@ struct drm_gem_object *msm_gem_prime_import(struct drm_device *dev, 
		goto fail_put;

	}



	domain = (flags & ION_FLAG_SECURE) ? MSM_SMMU_DOMAIN_SECURE :

						MSM_SMMU_DOMAIN_UNSECURE;

	if (kms && kms->funcs->get_address_space_device)

		attach_dev = kms->funcs->get_address_space_device(

							kms, domain);

	if (!kms || !kms->funcs->get_address_space_device) {

		DRM_ERROR("invalid kms ops\n");

		goto fail_put;

	}



	if (flags & ION_FLAG_SECURE) {

		if (flags & ION_FLAG_CP_PIXEL)

			attach_dev = kms->funcs->get_address_space_device(kms,

						MSM_SMMU_DOMAIN_SECURE);



		else if ((flags & ION_FLAG_CP_SEC_DISPLAY)

				|| (flags & ION_FLAG_CP_CAMERA_PREVIEW))

			attach_dev = dev->dev;

		else

			DRM_ERROR("invalid ion secure flag: 0x%x\n", flags);

	} else {

		attach_dev = kms->funcs->get_address_space_device(kms,

						MSM_SMMU_DOMAIN_UNSECURE);

	}



	if (!attach_dev) {

		DRM_ERROR("aspace device not found for domain:%d\n", domain);

		ret = -EINVAL;