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drm/exynos: Add fallback option to get non physically contiguous memory for fb

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While trying to get boot-logo up on exynos5420 SMDK which has eDP panel
connected with resolution 2560x1600, following error occured even with
IOMMU enabled:
[0.880000] [drm:lowlevel_buffer_allocate] *ERROR* failed to allocate buffer.
[0.890000] [drm] Initialized exynos 1.0.0 20110530 on minor 0

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

Signed-off-by: Vikas Sajjan <vikas.sajjan@linaro.org>
Signed-off-by: Arun Kumar <arun.kk@samsung.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Vikas Sajjan 2013-08-06 17:22:04 +05:30 committed by Inki Dae
parent 3b28802e37
commit a1bfacf400
1 changed files with 13 additions and 2 deletions
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15
drivers/gpu/drm/exynos/exynos_drm_fbdev.c
View File

@ -16,6 +16,7 @@
#include <drm/drm_crtc.h> #include <drm/drm_crtc.h>
#include <drm/drm_fb_helper.h> #include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h> #include <drm/drm_crtc_helper.h>
#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h" #include "exynos_drm_drv.h"
#include "exynos_drm_fb.h" #include "exynos_drm_fb.h"
@ -165,8 +166,18 @@ static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
size = mode_cmd.pitches[0] * mode_cmd.height; size = mode_cmd.pitches[0] * mode_cmd.height;
/* 0 means to allocate physically continuous memory */ exynos_gem_obj = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG, size);
exynos_gem_obj = exynos_drm_gem_create(dev, 0, 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(&pdev->dev, "contiguous FB allocation failed, falling back to non-contiguous\n");
exynos_gem_obj = exynos_drm_gem_create(dev, EXYNOS_BO_NONCONTIG,
size);
}
if (IS_ERR(exynos_gem_obj)) { if (IS_ERR(exynos_gem_obj)) {
ret = PTR_ERR(exynos_gem_obj); ret = PTR_ERR(exynos_gem_obj);
goto err_release_framebuffer; goto err_release_framebuffer;