diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2013-05-27 20:19:56 +0300 |
|---|---|---|
| committer | Dave Airlie <airlied@gmail.com> | 2013-06-17 19:42:46 +1000 |
| commit | 8391a3d5bc6269cb0622c136ec7f125a2d5fb5f9 (patch) | |
| tree | 6d905c86cd00fa40c391e213ffbb1c7d5bf003c1 /drivers/gpu/drm/drm_fb_helper.c | |
| parent | 778ad903f951a45a309a5a70dbdcf38eccabeaf0 (diff) | |
drm/fb-helper: Don't clobber the display palette when fbdev isn't bound
Perform the drm_fb_helper_is_bound() check to avoid clobbering the
display palette of some other KMS client.
While at it, fix up the locking by grabbing all modeset locks for the
duration of the fb_setcmap operation.
v2: Make a note of the locking changes in the commit message
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/drm_fb_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 78219752dd0e..dff205849b34 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -640,12 +640,19 @@ static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; + struct drm_device *dev = fb_helper->dev; struct drm_crtc_helper_funcs *crtc_funcs; u16 *red, *green, *blue, *transp; struct drm_crtc *crtc; int i, j, rc = 0; int start; + drm_modeset_lock_all(dev); + if (!drm_fb_helper_is_bound(fb_helper)) { + drm_modeset_unlock_all(dev); + return -EBUSY; + } + for (i = 0; i < fb_helper->crtc_count; i++) { crtc = fb_helper->crtc_info[i].mode_set.crtc; crtc_funcs = crtc->helper_private; @@ -668,10 +675,12 @@ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); if (rc) - return rc; + goto out; } crtc_funcs->load_lut(crtc); } + out: + drm_modeset_unlock_all(dev); return rc; } EXPORT_SYMBOL(drm_fb_helper_setcmap); |