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| author | Jonathan Marek <jonathan@marek.ca> | 2018-11-14 17:08:04 -0500 |
|---|---|---|
| committer | Rob Clark <robdclark@gmail.com> | 2018-12-11 13:07:10 -0500 |
| commit | c2052a4e5c99f7edcb0283e6e12b2fb6975b7353 (patch) | |
| tree | 2c1b7d32227e42b3d757d3cce7b6a5af1fbdad4a /drivers/gpu/drm/msm/msm_drv.c | |
| parent | d1d9d0e1724d6a7123b4280fdf6630ae70f96c9c (diff) | |
| download | linux-c2052a4e5c99f7edcb0283e6e12b2fb6975b7353.tar.gz | |
drm/msm: implement a2xx mmu
A2XX has its own very simple MMU.
Added a msm_use_mmu() function because we can't rely on iommu_present to
decide to use MMU or not.
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/msm/msm_drv.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_drv.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 7661ca71fca6..ae3d6b440bcc 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -26,6 +26,7 @@ #include "msm_gem.h" #include "msm_gpu.h" #include "msm_kms.h" +#include "adreno/adreno_gpu.h" /* @@ -361,6 +362,14 @@ static int get_mdp_ver(struct platform_device *pdev) #include <linux/of_address.h> +bool msm_use_mmu(struct drm_device *dev) +{ + struct msm_drm_private *priv = dev->dev_private; + + /* a2xx comes with its own MMU */ + return priv->is_a2xx || iommu_present(&platform_bus_type); +} + static int msm_init_vram(struct drm_device *dev) { struct msm_drm_private *priv = dev->dev_private; @@ -399,7 +408,7 @@ static int msm_init_vram(struct drm_device *dev) * Grab the entire CMA chunk carved out in early startup in * mach-msm: */ - } else if (!iommu_present(&platform_bus_type)) { + } else if (!msm_use_mmu(dev)) { DRM_INFO("using %s VRAM carveout\n", vram); size = memparse(vram, NULL); } |