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Commit eb78f9b3 authored by Ben Dooks's avatar Ben Dooks Committed by Linus Torvalds
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sm501fb: Ensure panel interface is not tristated when setup 



When we setup the panel interface whilst configuring the
framebuffer, we should ensure the panel interface is not
in tristate, in case the bootloader or previous setup has
not enabled it.

Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
Signed-off-by: default avatarAntonino Daplas <adaplas@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent f22e521f

drivers/video/sm501fb.c

+5 −0
Original line number Diff line number Diff line
@@ -777,6 +777,11 @@ static int sm501fb_set_par_pnl(struct fb_info *info) 
	writel(control, fbi->regs + SM501_DC_PANEL_CONTROL);

	sm501fb_sync_regs(fbi);



	/* ensure the panel interface is not tristated at this point */



	sm501_modify_reg(fbi->dev->parent, SM501_SYSTEM_CONTROL,

			 0, SM501_SYSCTRL_PANEL_TRISTATE);



	/* power the panel up */

	sm501fb_panel_power(fbi, 1);

	return 0;

include/linux/sm501-regs.h

+18 −0
Original line number Diff line number Diff line
@@ -15,6 +15,24 @@ 


/* config 1 */

#define SM501_SYSTEM_CONTROL 		(0x000000)



#define SM501_SYSCTRL_PANEL_TRISTATE	(1<<0)

#define SM501_SYSCTRL_MEM_TRISTATE	(1<<1)

#define SM501_SYSCTRL_CRT_TRISTATE	(1<<2)



#define SM501_SYSCTRL_PCI_SLAVE_BURST_MASK (3<<4)

#define SM501_SYSCTRL_PCI_SLAVE_BURST_1	(0<<4)

#define SM501_SYSCTRL_PCI_SLAVE_BURST_2	(1<<4)

#define SM501_SYSCTRL_PCI_SLAVE_BURST_4	(2<<4)

#define SM501_SYSCTRL_PCI_SLAVE_BURST_8	(3<<4)



#define SM501_SYSCTRL_PCI_CLOCK_RUN_EN	(1<<6)

#define SM501_SYSCTRL_PCI_RETRY_DISABLE	(1<<7)

#define SM501_SYSCTRL_PCI_SUBSYS_LOCK	(1<<11)

#define SM501_SYSCTRL_PCI_BURST_READ_EN	(1<<15)



/* miscellaneous control */



#define SM501_MISC_CONTROL		(0x000004)



#define SM501_MISC_BUS_SH		(0x0)