Hi Inki,
The below fix doesn't affect the FB dev buffer allocation. IMO the scenario where u-boot allocates the buffer is not disturbed. Please review the implementation.
Regards, Rahul Sharma.
On 7 May 2014 17:21, Rahul Sharma rahul.sharma@samsung.com wrote:
From: Rahul Sharma Rahul.Sharma@samsung.com
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.
Change-Id: I523e95aa308122ed2edc55e065ae6eb8be996541 Signed-off-by: Rahul Sharma Rahul.Sharma@samsung.com
drivers/gpu/drm/exynos/exynos_drm_gem.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c index 5d88924..7136945 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -624,22 +624,20 @@ 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);} else { exynos_gem_obj = exynos_drm_gem_create(dev,
EXYNOS_BO_NONCONTIG | EXYNOS_BO_WC,args->size);
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);-- 1.7.9.5