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video: msmfb: Put the partial update magic value into the fix_screen struct.

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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>
This commit is contained in:
Dima Zavin 2011-03-02 13:16:36 -08:00 committed by David Brown
parent bd32344a6b
commit b0a679326c
1 changed files with 12 additions and 0 deletions
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12
drivers/video/msm/msm_fb.c
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@ -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 |