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authorDima Zavin <dima@android.com>2011-03-02 13:16:36 -0800
committerDavid Brown <davidb@codeaurora.org>2011-03-02 13:43:15 -0800
commitb0a679326ce90e65779178906df5b8b6180163d6 (patch)
tree27fd11f34cdf1fdc880730a2c22b59aeba718276 /drivers/video/msm
parentbd32344a6baa8baac9c2b3e9c6c649cc4ed53920 (diff)
downloadop-kernel-dev-b0a679326ce90e65779178906df5b8b6180163d6.zip
op-kernel-dev-b0a679326ce90e65779178906df5b8b6180163d6.tar.gz
video: msmfb: Put the partial update magic value into the fix_screen struct.
This can then be tested by userspace to see if the capability is supported. Userspace cannot rely on that value being left in var_screen, since userspace itself can change it. Signed-off-by: Dima Zavin <dima@android.com> Signed-off-by: Carl Vanderlip <carlv@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org>
Diffstat (limited to 'drivers/video/msm')
-rw-r--r--drivers/video/msm/msm_fb.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/video/msm/msm_fb.c b/drivers/video/msm/msm_fb.c
index 5436aeb..fe5efe5 100644
--- a/drivers/video/msm/msm_fb.c
+++ b/drivers/video/msm/msm_fb.c
@@ -469,6 +469,18 @@ static void setup_fb_info(struct msmfb_info *msmfb)
fb_info->var.yoffset = 0;
if (msmfb->panel->caps & MSMFB_CAP_PARTIAL_UPDATES) {
+ /*
+ * Set the param in the fixed screen, so userspace can't
+ * change it. This will be used to check for the
+ * capability.
+ */
+ fb_info->fix.reserved[0] = 0x5444;
+ fb_info->fix.reserved[1] = 0x5055;
+
+ /*
+ * This preloads the value so that if userspace doesn't
+ * change it, it will be a full update
+ */
fb_info->var.reserved[0] = 0x54445055;
fb_info->var.reserved[1] = 0;
fb_info->var.reserved[2] = (uint16_t)msmfb->xres |
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