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| author |   Lowry Li (Arm Technology China) <Lowry.Li@arm.com> | 2019-06-06 10:53:05 +0100 |
|---|---|---|
| committer |   Liviu Dudau <Liviu.Dudau@arm.com> | 2019-06-19 11:42:17 +0100 |
| commit | e87cae37f6006f5cebb2ae2b39daf39be7fc0a27 (patch) | |
| tree | 0561ff5289d4614ddb4609fbfe1a50fb10916570 /drivers/gpu/drm/arm/display/komeda/komeda_dev.c | |
| parent | drm/komeda: Enable color-encoding (YUV format) support (diff) | |
| download | linux-stable-e87cae37f6006f5cebb2ae2b39daf39be7fc0a27.tar.xz linux-stable-e87cae37f6006f5cebb2ae2b39daf39be7fc0a27.zip | |
drm/komeda: Adds SMMU support
Adds iommu_connect and disconnect for SMMU support, and configures
TBU translation once SMMU has been attached to the display device.
Signed-off-by: Lowry Li (Arm Technology China) <lowry.li@arm.com>
[fixed checking of error code returned by dp_wait_cond() and removed
extraneous DRM_ERROR() calls]
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Diffstat (limited to 'drivers/gpu/drm/arm/display/komeda/komeda_dev.c')
| -rw-r--r-- | drivers/gpu/drm/arm/display/komeda/komeda_dev.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c index b67030a9f056..7bb5f88db792 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c @@ -5,6 +5,7 @@ * */ #include <linux/io.h> +#include <linux/iommu.h> #include <linux/of_device.h> #include <linux/of_graph.h> #include <linux/platform_device.h> @@ -253,6 +254,18 @@ struct komeda_dev *komeda_dev_create(struct device *dev) dev->dma_parms = &mdev->dma_parms; dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); + mdev->iommu = iommu_get_domain_for_dev(mdev->dev); + if (!mdev->iommu) + DRM_INFO("continue without IOMMU support!\n"); + + if (mdev->iommu && mdev->funcs->connect_iommu) { + err = mdev->funcs->connect_iommu(mdev); + if (err) { + mdev->iommu = NULL; + goto err_cleanup; + } + } + err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group); if (err) { DRM_ERROR("create sysfs group failed.\n"); @@ -282,6 +295,10 @@ void komeda_dev_destroy(struct komeda_dev *mdev) debugfs_remove_recursive(mdev->debugfs_root); #endif + if (mdev->iommu && mdev->funcs->disconnect_iommu) + mdev->funcs->disconnect_iommu(mdev); + mdev->iommu = NULL; + for (i = 0; i < mdev->n_pipelines; i++) { komeda_pipeline_destroy(mdev, mdev->pipelines[i]); mdev->pipelines[i] = NULL; |