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Commit 3fec4532 authored by Vikas Sajjan's avatar Vikas Sajjan Committed by Inki Dae
Browse files

drm/exynos: Consider fallback option to allocation fail 



To address the case where physically contiguous memory
MAY NOT be a mandatory requirement for framebuffer for
the application calling exynos_drm_gem_dumb_create,
the patch adds a feature to get non physically contiguous
memory for framebuffer, if physically contiguous memory
allocation fails and if IOMMU is supported.

Signed-off-by: default avatarVikas Sajjan <vikas.sajjan@linaro.org>
Signed-off-by: default avatarArun Kumar <arun.kk@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
parent 562ad9f4

drivers/gpu/drm/exynos/exynos_drm_gem.c

+13 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include "exynos_drm_drv.h"

#include "exynos_drm_gem.h"

#include "exynos_drm_buf.h"

#include "exynos_drm_iommu.h"



static unsigned int convert_to_vm_err_msg(int msg)

{
@@ -666,6 +667,18 @@ int exynos_drm_gem_dumb_create(struct drm_file *file_priv, 


	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");

		exynos_gem_obj = exynos_drm_gem_create(dev,

					EXYNOS_BO_NONCONTIG | EXYNOS_BO_WC,

					args->size);

	}



	if (IS_ERR(exynos_gem_obj))

		return PTR_ERR(exynos_gem_obj);