[PATCH] savagefb: Fix black screen on load in Savage IX (5b600464) · Commits · 戴 / test

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>

drivers/video/savage/savagefb_driver.c

+13 −0

Original line number	Diff line number	Diff line
		@@ -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)

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