From eb78f9b3fa8532057d2a45acbe415b27ece6341b Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Tue, 16 Oct 2007 01:28:39 -0700 Subject: [PATCH 1/1] 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: Ben Dooks Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/sm501fb.c | 5 +++++ include/linux/sm501-regs.h | 18 ++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/drivers/video/sm501fb.c b/drivers/video/sm501fb.c index d97edd7a6e..1be95a68d6 100644 --- a/drivers/video/sm501fb.c +++ b/drivers/video/sm501fb.c @@ -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; diff --git a/include/linux/sm501-regs.h b/include/linux/sm501-regs.h index 014e73b31f..df7620dd8f 100644 --- a/include/linux/sm501-regs.h +++ b/include/linux/sm501-regs.h @@ -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) -- 2.39.2