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drm/exynos: allocate non-contigous buffers when iommu is enabled

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Allow to allocate non-contigous buffers when iommu is enabled.
Currently, it tries to allocates contigous buffer which consistently
fail for large buffers and then fall back to non contigous. Apart
from being slow, this implementation is also very noisy and fills
the screen with alloc fail logs.

Signed-off-by: Rahul Sharma <Rahul.Sharma@samsung.com>
Reviewed-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Rahul Sharma 2014-05-07 17:21:29 +05:30 committed by Inki Dae
parent e2a562dce8
commit 122beea84b
1 changed files with 10 additions and 12 deletions
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22
drivers/gpu/drm/exynos/exynos_drm_gem.c
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@ -612,22 +612,20 @@ int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
args->pitch = args->width * ((args->bpp + 7) / 8);
args->size = args->pitch * args->height;
exynos_gem_obj = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG |
EXYNOS_BO_WC, args->size);
/*
* If physically contiguous memory allocation fails and if IOMMU is
* supported then try to get buffer from non physically contiguous
* memory area.
*/
if (IS_ERR(exynos_gem_obj) && is_drm_iommu_supported(dev)) {
dev_warn(dev->dev, "contiguous FB allocation failed, falling back to non-contiguous\n");
if (is_drm_iommu_supported(dev)) {
exynos_gem_obj = exynos_drm_gem_create(dev,
EXYNOS_BO_NONCONTIG | EXYNOS_BO_WC,
args->size);
EXYNOS_BO_NONCONTIG | EXYNOS_BO_WC,
args->size);
} else {
exynos_gem_obj = exynos_drm_gem_create(dev,
EXYNOS_BO_CONTIG | EXYNOS_BO_WC,
args->size);
}
if (IS_ERR(exynos_gem_obj))
if (IS_ERR(exynos_gem_obj)) {
dev_warn(dev->dev, "FB allocation failed.\n");
return PTR_ERR(exynos_gem_obj);
}
ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv,
&args->handle);