Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-19 10:31:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

drm/meson: add size and alignment requirements for dumb buffers

Browse Source 
The Amlogic SoCs Canvas buffers stride must be aligned on 64bytes
and overall size should be aligned on PAGE width.

Adds a custom dumb_create op to adds these requirements.

Fixes: bbbe775ec5 ("drm: Add support for Amlogic Meson Graphic Controller")
Suggested-by: Sky Zhou <sky.zhou@amlogic.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Sky Zhou <sky.zhou@amlogic.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190408090137.2402-1-narmstrong@baylibre.com
This commit is contained in:
Neil Armstrong 2019-04-08 11:01:37 +02:00
parent 2ccb8433eb
commit 852ce7285c
1 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/gpu/drm/meson/meson_drv.c
View File

@ -90,6 +90,18 @@ static irqreturn_t meson_irq(int irq, void *arg)
return IRQ_HANDLED;
}
static int meson_dumb_create(struct drm_file *file, struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
/*
* We need 64bytes aligned stride, and PAGE aligned size
*/
args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), SZ_64);
args->size = PAGE_ALIGN(args->pitch * args->height);
return drm_gem_cma_dumb_create_internal(file, dev, args);
}
DEFINE_DRM_GEM_CMA_FOPS(fops);
static struct drm_driver meson_driver = {
@ -112,7 +124,7 @@ static struct drm_driver meson_driver = {
.gem_prime_mmap = drm_gem_cma_prime_mmap,
/* GEM Ops */
.dumb_create = drm_gem_cma_dumb_create,
.dumb_create = meson_dumb_create,
.gem_free_object_unlocked = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,