diff options
| author | Philippe Cornu <philippe.cornu@st.com> | 2018-01-30 11:42:00 +0100 |
|---|---|---|
| committer | Benjamin Gaignard <benjamin.gaignard@linaro.org> | 2018-01-30 11:45:15 +0100 |
| commit | 21f815bf773c1f7dc278060eb49d7651c3175148 (patch) | |
| tree | 6d4ec9d251e33bfeed9095583c186313cd91c9bb /drivers/gpu/drm/stm | |
| parent | 023f34890199dc16c6b4451fa30b7b1ced54113c (diff) | |
drm/stm: drv: Improve data transfers
To optimize data transfers, align pitch on 128 bytes & height
on 4 bytes. This optimization is not applicable on hw without MMU.
Signed-off-by: Yannick Fertre <yannick.fertre@st.com>
Signed-off-by: Vincent Abriou <vincent.abriou@st.com>
Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180130104200.21602-1-philippe.cornu@st.com
Diffstat (limited to 'drivers/gpu/drm/stm')
| -rw-r--r-- | drivers/gpu/drm/stm/drv.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/gpu/drm/stm/drv.c b/drivers/gpu/drm/stm/drv.c index 8fe954c27fba..8bc7e8418b8d 100644 --- a/drivers/gpu/drm/stm/drv.c +++ b/drivers/gpu/drm/stm/drv.c @@ -31,6 +31,24 @@ static const struct drm_mode_config_funcs drv_mode_config_funcs = { .atomic_commit = drm_atomic_helper_commit, }; +static int stm_gem_cma_dumb_create(struct drm_file *file, + struct drm_device *dev, + struct drm_mode_create_dumb *args) +{ +#ifdef CONFIG_MMU + unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); + + /* + * in order to optimize data transfer, pitch is aligned on + * 128 bytes, height is aligned on 4 bytes + */ + args->pitch = roundup(min_pitch, 128); + args->height = roundup(args->height, 4); +#endif + + return drm_gem_cma_dumb_create_internal(file, dev, args); +} + DEFINE_DRM_GEM_CMA_FOPS(drv_driver_fops); static struct drm_driver drv_driver = { @@ -44,7 +62,7 @@ static struct drm_driver drv_driver = { .minor = 0, .patchlevel = 0, .fops = &drv_driver_fops, - .dumb_create = drm_gem_cma_dumb_create, + .dumb_create = stm_gem_cma_dumb_create, .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_free_object_unlocked = drm_gem_cma_free_object, |