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authorBen Dooks <ben-linux@fluff.org>2007-10-16 01:28:39 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:43:14 -0700
commiteb78f9b3fa8532057d2a45acbe415b27ece6341b (patch)
tree0ad087338d6b29887533a20e97770a56ea4308ef
parentf22e521f2992031fdedb661f2a647cafd2e45fa1 (diff)
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 <ben-linux@fluff.org> 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>
-rw-r--r--drivers/video/sm501fb.c5
-rw-r--r--include/linux/sm501-regs.h18
2 files changed, 23 insertions, 0 deletions
diff --git a/drivers/video/sm501fb.c b/drivers/video/sm501fb.c
index d97edd7a6e4..1be95a68d69 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 014e73b31fc..df7620dd8f3 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)