[PATCH v2 3/3] drm/kms: allocate framebuffer cmap

Clemens Ladisch
2009-11-03T12:20:14Z

Without an allocated colormap, FBIOGETCMAP fails. This would make
programs restore an all-black colormap ("links -g") or fail to work
altogether ("mplayer -vo fbdev2").

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
---
v2: implemented suggestions by James Simmons

drivers/gpu/drm/drm_fb_helper.c | 4 ++++
1 file changed, 4 insertions(+)

--- linux-2.6/drivers/gpu/drm/drm_fb_helper.c
+++ linux-2.6/drivers/gpu/drm/drm_fb_helper.c
@@ -905,6 +905,9 @@ int drm_fb_helper_single_fb_probe(struct

if (new_fb) {
info->var.pixclock = 0;
+ ret = fb_alloc_cmap(&info->cmap, crtc->gamma_size, 0);
+ if (ret)
+ return ret;
if (register_framebuffer(info) < 0)
return -EINVAL;
} else {
@@ -936,6 +939,7 @@ void drm_fb_helper_free(struct drm_fb_he
unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
}
drm_fb_helper_crtc_free(helper);
+ fb_dealloc_cmap(&helper->fb->fbdev->cmap);
}
EXPORT_SYMBOL(drm_fb_helper_free);