diff options
| author | Alexey Brodkin <abrodkin@synopsys.com> | 2016-04-27 16:02:39 +0300 |
|---|---|---|
| committer | Alexey Brodkin <abrodkin@synopsys.com> | 2016-04-29 14:22:32 +0300 |
| commit | 8aeab995fa142523f376369e4ce0608df6727706 (patch) | |
| tree | f3c63d317d6627afa3e9c61d0b61500cf55bf2e2 /drivers | |
| parent | b89359bdf0f1e95a4c5f92300594ba9dde323fc4 (diff) | |
| download | linux-8aeab995fa142523f376369e4ce0608df6727706.tar.xz | |
drm/arcpgu: use dedicated memory area for frame buffer
Now when ARC supports reserved memory areas and
per-device coherent DMA allocations we may switch ARC PGU
to use of those dedicated areas.
One of the benefits we may move frame-buffer area out
from IO Coherency aperture and so significantly
reduce IOC utilization allowing less demanding
peripherals to use all perks of IOC.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: linux-kernel@vger.kernel.org
Cc: linux-snps-arc@lists.infradead.org
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/arc/arcpgu_drv.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/arc/arcpgu_drv.c b/drivers/gpu/drm/arc/arcpgu_drv.c index 5b35e5dbae38..76e187a5bde0 100644 --- a/drivers/gpu/drm/arc/arcpgu_drv.c +++ b/drivers/gpu/drm/arc/arcpgu_drv.c @@ -19,6 +19,7 @@ #include <drm/drm_fb_cma_helper.h> #include <drm/drm_gem_cma_helper.h> #include <drm/drm_atomic_helper.h> +#include <linux/of_reserved_mem.h> #include "arcpgu.h" #include "arcpgu_regs.h" @@ -135,6 +136,11 @@ static int arcpgu_load(struct drm_device *drm) dev_info(drm->dev, "arc_pgu ID: 0x%x\n", arc_pgu_read(arcpgu, ARCPGU_REG_ID)); + /* Get the optional framebuffer memory resource */ + ret = of_reserved_mem_device_init(drm->dev); + if (ret && ret != -ENODEV) + return ret; + if (dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32))) return -ENODEV; |