diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2019-01-18 13:20:17 +0100 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2019-01-28 14:24:53 +0100 |
| commit | feba24de7003d93fd156bb72763283832b8af3d6 (patch) | |
| tree | 7aacbc03dd6e6df0f3f21936a1619ac83117bbbb /drivers/gpu/drm | |
| parent | 182e7f96f0cb7878d7e001cf9176aae56283f233 (diff) | |
drm/qxl: add mode/framebuffer check functions
Add a helper functions to check video modes. Also add a helper to check
framebuffer buffer objects, using the former for consistency. That way
we should not fail in qxl_primary_atomic_check() because video modes
which are too big will not be added to the mode list in the first place.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20190118122020.27596-21-kraxel@redhat.com
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/qxl/qxl_display.c | 44 |
1 files changed, 26 insertions, 18 deletions
diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c index e8c646ffab90..4b901e810467 100644 --- a/drivers/gpu/drm/qxl/qxl_display.c +++ b/drivers/gpu/drm/qxl/qxl_display.c @@ -190,6 +190,28 @@ void qxl_display_read_client_monitors_config(struct qxl_device *qdev) } } +static int qxl_check_mode(struct qxl_device *qdev, + unsigned int width, + unsigned int height) +{ + unsigned int stride; + unsigned int size; + + if (check_mul_overflow(width, 4u, &stride)) + return -EINVAL; + if (check_mul_overflow(stride, height, &size)) + return -EINVAL; + if (size > qdev->vram_size) + return -ENOMEM; + return 0; +} + +static int qxl_check_framebuffer(struct qxl_device *qdev, + struct qxl_bo *bo) +{ + return qxl_check_mode(qdev, bo->surf.width, bo->surf.height); +} + static int qxl_add_monitors_config_modes(struct drm_connector *connector, unsigned *pwidth, unsigned *pheight) @@ -469,12 +491,7 @@ static int qxl_primary_atomic_check(struct drm_plane *plane, bo = gem_to_qxl_bo(state->fb->obj[0]); - if (bo->surf.stride * bo->surf.height > qdev->vram_size) { - DRM_ERROR("Mode doesn't fit in vram size (vgamem)"); - return -EINVAL; - } - - return 0; + return qxl_check_framebuffer(qdev, bo); } static int qxl_primary_apply_cursor(struct drm_plane *plane) @@ -990,20 +1007,11 @@ static enum drm_mode_status qxl_conn_mode_valid(struct drm_connector *connector, { struct drm_device *ddev = connector->dev; struct qxl_device *qdev = ddev->dev_private; - int i; - - /* TODO: is this called for user defined modes? (xrandr --add-mode) - * TODO: check that the mode fits in the framebuffer */ - if (qdev->monitors_config_width == mode->hdisplay && - qdev->monitors_config_height == mode->vdisplay) - return MODE_OK; + if (qxl_check_mode(qdev, mode->hdisplay, mode->vdisplay) != 0) + return MODE_BAD; - for (i = 0; i < ARRAY_SIZE(common_modes); i++) { - if (common_modes[i].w == mode->hdisplay && common_modes[i].h == mode->vdisplay) - return MODE_OK; - } - return MODE_BAD; + return MODE_OK; } static struct drm_encoder *qxl_best_encoder(struct drm_connector *connector) |