> -----Original Message-----
> From: Prathyush K [mailto:prathyus...@samsung.com]
> Sent: Wednesday, July 11, 2012 6:40 PM
> To: dri-devel@lists.freedesktop.org
> Cc: prathy...@chromium.org; m.szyprow...@samsung.com;
inki....@samsung.com;
> subash.ramasw...@linaro.org
> Subject: [PATCH 5/7] drm/exynos: attach drm device with common drm mapping
>
> This patch sets the common mapping created during drm init, to the
> drm device's archdata. The dma_ops of drm device is set as arm_iommu_ops.
> The common mapping is shared across all the drm devices which ensures
> that any buffer allocated with drm is accessible by drm-fimd or drm-hdmi
> or both.
>
> Signed-off-by: Prathyush K <prathyus...@samsung.com>
> ---
> drivers/gpu/drm/exynos/exynos_drm_drv.c | 9 +++++++++
> 1 files changed, 9 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c
> b/drivers/gpu/drm/exynos/exynos_drm_drv.c
> index c3ad87e..2e40ca8 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
> @@ -276,6 +276,15 @@ static struct drm_driver exynos_drm_driver = {
>
> static int exynos_drm_platform_probe(struct platform_device *pdev)
> {
> +#ifdef CONFIG_EXYNOS_IOMMU
> + struct device *dev = &pdev->dev;
> +
> + kref_get(&exynos_drm_common_mapping->kref);
> + dev->archdata.mapping = exynos_drm_common_mapping;
Ok, exynos_drm_common_mapping is shared with drivers using
dev->archdata.mapping
> + set_dma_ops(dev, &arm_iommu_ops);
> +
> + DRM_INFO("drm common mapping set to drm device.\n");
> +#endif
> DRM_DEBUG_DRIVER("%s\n", __FILE__);
>
> exynos_drm_driver.num_ioctls = DRM_ARRAY_SIZE(exynos_ioctls);
> --
> 1.7.0.4
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