Hi Vikas,
On 6 August 2013 10:53, Vikas Sajjan vikas.sajjan@linaro.org wrote:
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 continous memory MAY NOT be a mandatory requirement for fb, the patch adds a feature to get non physically continous memory for fb if IOMMU is supported and if CONTIG memory allocation fails.
The patch looks fine. Just a small nit. Please use the word contiguous instead of continuous to refer to memory locations consistently in this patch.
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
changes since v2: - addressed comments given by Tomasz Figa tomasz.figa@gmail.com.
changes since v1: - Modified to add the fallback patch if CONTIG alloc fails as suggested by Rob Clark robdclark@gmail.com and Tomasz Figa tomasz.figa@gmail.com.
- changed the commit message.
drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c index 8e60bd6..faec77e 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c @@ -16,6 +16,7 @@ #include <drm/drm_crtc.h> #include <drm/drm_fb_helper.h> #include <drm/drm_crtc_helper.h> +#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h" #include "exynos_drm_fb.h" @@ -165,8 +166,17 @@ static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
size = mode_cmd.pitches[0] * mode_cmd.height;
/* 0 means to allocate physically continuous memory */exynos_gem_obj = exynos_drm_gem_create(dev, 0, size);
exynos_gem_obj = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG, size);/** If IOMMU is supported then try to get buffer from non physically* continous memory area.*/
To make this more clear, you could say, "If physically contiguous memory allocation fails and if IOMMU is supported, try to ....."
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)) { ret = PTR_ERR(exynos_gem_obj); goto err_release_framebuffer;-- 1.7.9.5
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