The DU requires a 16 pixels pitch alignement. Make sure dumb buffers are
allocated with the correct pitch, and validate the pitch when creating
frame buffers.
Signed-off-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
---
drivers/gpu/drm/rcar-du/rcar_du_drv.c | 2 +-
drivers/gpu/drm/rcar-du/rcar_du_kms.c | 19 ++++++++++++++++++-
drivers/gpu/drm/rcar-du/rcar_du_kms.h | 3 +++
3 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index 2a85056..bcda2e0 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -200,7 +200,7 @@ static struct drm_driver rcar_du_driver = {
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_import = drm_gem_cma_dmabuf_import,
.gem_prime_export = drm_gem_cma_dmabuf_export,
- .dumb_create = drm_gem_cma_dumb_create,
+ .dumb_create = rcar_du_dumb_create,
.dumb_map_offset = drm_gem_cma_dumb_map_offset,
.dumb_destroy = drm_gem_cma_dumb_destroy,
.fops = &rcar_du_fops,
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 06cacf6..d30c2e2 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -138,11 +138,25 @@ void rcar_du_encoder_mode_commit(struct drm_encoder
*encoder)
* Frame buffer
*/
+int rcar_du_dumb_create(struct drm_file *file, struct drm_device *dev,
+ struct drm_mode_create_dumb *args)
+{
+ unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
+ unsigned int align;
+
+ /* The pitch must be aligned to a 16 pixels boundary. */
+ align = 16 * args->bpp / 8;
+ args->pitch = roundup(max(args->pitch, min_pitch), align);
+
+ return drm_gem_cma_dumb_create(file, dev, args);
+}
+
static struct drm_framebuffer *
rcar_du_fb_create(struct drm_device *dev, struct drm_file *file_priv,
struct drm_mode_fb_cmd2 *mode_cmd)
{
const struct rcar_du_format_info *format;
+ unsigned int align;
format = rcar_du_format_info(mode_cmd->pixel_format);
if (format == NULL) {
@@ -151,7 +165,10 @@ rcar_du_fb_create(struct drm_device *dev, struct drm_file
*file_priv,
return ERR_PTR(-EINVAL);
}
- if (mode_cmd->pitches[0] & 15 || mode_cmd->pitches[0] >= 8192) {
+ align = 16 * format->bpp / 8;
+
+ if (mode_cmd->pitches[0] & (align - 1) ||
+ mode_cmd->pitches[0] >= 8192) {
dev_dbg(dev->dev, "invalid pitch value %u\n",
mode_cmd->pitches[0]);
return ERR_PTR(-EINVAL);
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.h
b/drivers/gpu/drm/rcar-du/rcar_du_kms.h
index e4d8db0..dba4722 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.h
@@ -56,4 +56,7 @@ void rcar_du_encoder_mode_commit(struct drm_encoder *encoder);
int rcar_du_modeset_init(struct rcar_du_device *rcdu);
+int rcar_du_dumb_create(struct drm_file *file, struct drm_device *dev,
+ struct drm_mode_create_dumb *args);
+
#endif /* __RCAR_DU_KMS_H__ */
--
1.8.1.5
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