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drm/exynos: clear channels only when iommu is enabled 

This is simplest solution about reported problem[1]. It's no problem to
clear channel only when iommu is enabled, if we consider that we cannot
recognize iommu errors when iommu is disabled and it have been valid
until now. But this cannot be nice solution.

[1] https://lkml.org/lkml/2015/7/21/404

Reported-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Joonyoung Shim 2015-07-28 17:51:02 +09:00 committed by Inki Dae
parent eb7a3fc74c
commit 43a3b866a9
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/exynos/exynos_drm_fimd.c
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@ -956,7 +956,8 @@ static int fimd_bind(struct device *dev, struct device *master, void *data)
if (ctx->display)
exynos_drm_create_enc_conn(drm_dev, ctx->display);
fimd_clear_channels(ctx->crtc);
if (is_drm_iommu_supported(drm_dev))
fimd_clear_channels(ctx->crtc);
ret = drm_iommu_attach_device(drm_dev, dev);
if (ret)