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authorPhilippe Cornu <philippe.cornu@st.com>2018-01-30 11:42:00 +0100
committerBenjamin Gaignard <benjamin.gaignard@linaro.org>2018-01-30 11:45:15 +0100
commit21f815bf773c1f7dc278060eb49d7651c3175148 (patch)
tree6d4ec9d251e33bfeed9095583c186313cd91c9bb /drivers
parent023f34890199dc16c6b4451fa30b7b1ced54113c (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')
-rw-r--r--drivers/gpu/drm/stm/drv.c20
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,