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[PATCH] savagefb: Fix black screen on load in Savage IX

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This is a hack that seems to kick start the 2D engine of the Savage IX in some
Toshiba laptops.  Without this, the laptop starts with a black screen and
occasionally crashes X.

Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Antonino A. Daplas 2007-03-16 13:38:18 -08:00 committed by Linus Torvalds
parent e52e15d3c1
commit 5b600464f0
1 changed files with 13 additions and 0 deletions
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13
drivers/video/savage/savagefb_driver.c
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@ -384,6 +384,19 @@ SavageSetup2DEngine(struct savagefb_par *par)
BCI_SEND(0);
BCI_SEND(BCI_CMD_SETREG | (1 << 16) | BCI_GBD2);
BCI_SEND(GlobalBitmapDescriptor);
/*
* I don't know why, sending this twice fixes the intial black screen,
* prevents X from crashing at least in Toshiba laptops with SavageIX.
* --Tony
*/
par->bci_ptr = 0;
par->SavageWaitFifo(par, 4);
BCI_SEND(BCI_CMD_SETREG | (1 << 16) | BCI_GBD1);
BCI_SEND(0);
BCI_SEND(BCI_CMD_SETREG | (1 << 16) | BCI_GBD2);
BCI_SEND(GlobalBitmapDescriptor);
}
static void savagefb_set_clip(struct fb_info *info)