Adding the pitch alignment as an argument to drm_gem_vram_fill_create_dumb() allows to align scanlines to certain offsets. A value of 0 disables scanline pitches.
v3: * only do power-of-2 test if pitch_align given; fails otherwise * mgag200: call drm_gem_vram_fill_create_dumb() with pitch_align v2: * split of patch from related hibmc changes * test if scanline pitch is power of 2
Signed-off-by: Thomas Zimmermann tzimmermann@suse.de Reviewed-by: Daniel Vetter daniel.vetter@ffwll.ch Acked-by: Sam Ravnborg sam@ravnborg.org --- drivers/gpu/drm/drm_gem_vram_helper.c | 13 ++++++++++--- drivers/gpu/drm/mgag200/mgag200_drv.c | 2 +- include/drm/drm_gem_vram_helper.h | 1 + 3 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c index 666cb4c22bb9..51ee1f7bc730 100644 --- a/drivers/gpu/drm/drm_gem_vram_helper.c +++ b/drivers/gpu/drm/drm_gem_vram_helper.c @@ -485,6 +485,7 @@ EXPORT_SYMBOL(drm_gem_vram_vunmap); * @dev: the DRM device * @bdev: the TTM BO device managing the buffer object * @pg_align: the buffer's alignment in multiples of the page size + * @pitch_align: the scanline's alignment in powers of 2 * @interruptible: sleep interruptible if waiting for memory * @args: the arguments as provided to \ &struct drm_driver.dumb_create @@ -502,6 +503,7 @@ int drm_gem_vram_fill_create_dumb(struct drm_file *file, struct drm_device *dev, struct ttm_bo_device *bdev, unsigned long pg_align, + unsigned long pitch_align, bool interruptible, struct drm_mode_create_dumb *args) { @@ -510,7 +512,12 @@ int drm_gem_vram_fill_create_dumb(struct drm_file *file, int ret; u32 handle;
- pitch = args->width * ((args->bpp + 7) / 8); + pitch = args->width * DIV_ROUND_UP(args->bpp, 8); + if (pitch_align) { + if (WARN_ON_ONCE(!is_power_of_2(pitch_align))) + return -EINVAL; + pitch = ALIGN(pitch, pitch_align); + } size = pitch * args->height;
size = roundup(size, PAGE_SIZE); @@ -612,8 +619,8 @@ int drm_gem_vram_driver_dumb_create(struct drm_file *file, if (WARN_ONCE(!dev->vram_mm, "VRAM MM not initialized")) return -EINVAL;
- return drm_gem_vram_fill_create_dumb(file, dev, &dev->vram_mm->bdev, 0, - false, args); + return drm_gem_vram_fill_create_dumb(file, dev, &dev->vram_mm->bdev, + 0, 0, false, args); } EXPORT_SYMBOL(drm_gem_vram_driver_dumb_create);
diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c index d43951caeea0..17877263cc9b 100644 --- a/drivers/gpu/drm/mgag200/mgag200_drv.c +++ b/drivers/gpu/drm/mgag200/mgag200_drv.c @@ -88,7 +88,7 @@ int mgag200_driver_dumb_create(struct drm_file *file, pg_align = PFN_UP(mdev->mc.vram_size);
return drm_gem_vram_fill_create_dumb(file, dev, &dev->vram_mm->bdev, - pg_align, false, args); + pg_align, 0, false, args); }
static struct drm_driver driver = { diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h index 08adaf3695ea..b86d038f8a3d 100644 --- a/include/drm/drm_gem_vram_helper.h +++ b/include/drm/drm_gem_vram_helper.h @@ -112,6 +112,7 @@ int drm_gem_vram_fill_create_dumb(struct drm_file *file, struct drm_device *dev, struct ttm_bo_device *bdev, unsigned long pg_align, + unsigned long pitch_align, bool interruptible, struct drm_mode_create_dumb *args);