Hi Inki,
On Tue, Aug 6, 2013 at 5:27 PM, Sachin Kamat <sachin.kamat@xxxxxxxxxx> wrote:
> On 6 August 2013 17:22, Vikas Sajjan <vikas.sajjan@xxxxxxxxxx> 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 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@xxxxxxxxxx>
>> Signed-off-by: Arun Kumar <arun.kk@xxxxxxxxxxx>
>> Reviewed-by: Rob Clark <robdclark@xxxxxxxxx>
>> ---
>> changes since v3:
>> - addressed nits pointed out by Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
>> and Sachin Kamat <sachin.kamat@xxxxxxxxxx>.
>>
>> changes since v2:
>> - addressed comments given by Tomasz Figa <tomasz.figa@xxxxxxxxx>.
>>
>> changes since v1:
>> - Modified to add the fallback patch if CONTIG alloc fails as suggested
>> by Rob Clark robdclark@xxxxxxxxx and Tomasz Figa <tomasz.figa@xxxxxxxxx>.
>>
>> - changed the commit message.
>> ---
>> drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 15 +++++++++++++--
>> 1 file changed, 13 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..5292fc7 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 +166,18 @@ 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 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)) {
>> ret = PTR_ERR(exynos_gem_obj);
>> goto err_release_framebuffer;
>> --
>> 1.7.9.5
>
> Looks good to me.
>
Can you apply this patch.
> --
> With warm regards,
> Sachin
> --
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