diff options
| author | Ivaylo Dimitrov <[email protected]> | 2022-01-19 10:23:11 +0000 |
|---|---|---|
| committer | Tomi Valkeinen <[email protected]> | 2022-03-28 09:39:52 +0000 |
| commit | 3ccd59f93004c369cc4c0f0939f80cb069f0fc2d (patch) | |
| tree | 5ce3eca7d913e4bbc1fab6988f74f8919a828c5b /drivers/gpu/drm/omapdrm/omap_gem.c | |
| parent | drm: omapdrm: Support exporting of non-contiguous GEM BOs (diff) | |
| download | kernel-3ccd59f93004c369cc4c0f0939f80cb069f0fc2d.tar.gz kernel-3ccd59f93004c369cc4c0f0939f80cb069f0fc2d.zip | |
drm: omapdrm: Do no allocate non-scanout GEMs through DMM/TILER
On devices with DMM, all allocations are done through either DMM or TILER.
DMM/TILER being a limited resource means that such allocations will start
to fail before actual free memory is exhausted. What is even worse is that
with time DMM/TILER space gets fragmented to the point that even if we have
enough free DMM/TILER space and free memory, allocation fails because there
is no big enough free block in DMM/TILER space.
Such failures can be easily observed with OMAP xorg DDX, for example -
starting few GUI applications (so buffers for their windows are allocated)
and then rotating landscape<->portrait while closing and opening new
windows soon results in allocation failures.
Fix that by mapping buffers through DMM/TILER only when really needed,
like, for scanout buffers.
Signed-off-by: Ivaylo Dimitrov <[email protected]>
Signed-off-by: Tomi Valkeinen <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'drivers/gpu/drm/omapdrm/omap_gem.c')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_gem.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c index 41c1a6d83b2b..cf571796fd26 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem.c +++ b/drivers/gpu/drm/omapdrm/omap_gem.c @@ -821,10 +821,12 @@ int omap_gem_pin(struct drm_gem_object *obj, dma_addr_t *dma_addr) if (ret) goto fail; - if (priv->has_dmm) { - ret = omap_gem_pin_tiler(obj); - if (ret) - goto fail; + if (omap_obj->flags & OMAP_BO_SCANOUT) { + if (priv->has_dmm) { + ret = omap_gem_pin_tiler(obj); + if (ret) + goto fail; + } } } else { refcount_inc(&omap_obj->pin_cnt); @@ -861,6 +863,8 @@ static void omap_gem_unpin_locked(struct drm_gem_object *obj) kfree(omap_obj->sgt); omap_obj->sgt = NULL; } + if (!(omap_obj->flags & OMAP_BO_SCANOUT)) + return; if (priv->has_dmm) { ret = tiler_unpin(omap_obj->block); if (ret) { |