diff options
| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2013-07-04 20:05:51 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2013-07-05 15:35:13 +1000 |
| commit | 59e32642d2e8fb170a1e777906dcb13359ea230f (patch) | |
| tree | 9867f1bcc22b862e1aa23da61154619ef075e41a /drivers/gpu/drm/rcar-du/rcar_du_kms.c | |
| parent | 3463ff67bc8d049098559adb850299c26b52350d (diff) | |
| download | op-kernel-dev-59e32642d2e8fb170a1e777906dcb13359ea230f.zip op-kernel-dev-59e32642d2e8fb170a1e777906dcb13359ea230f.tar.gz | |
drm/rcar-du: Fix buffer pitch alignment
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+renesas@ideasonboard.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/rcar-du/rcar_du_kms.c')
| -rw-r--r-- | drivers/gpu/drm/rcar-du/rcar_du_kms.c | 19 |
1 files changed, 18 insertions, 1 deletions
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); |
