[ARM] pxafb: allow insertion of delay to the smart panel command sequence

Some smart panel requires a delay between command sequences, while PXA
LCD controller didn't provide such one, let's emulate this by software.

A software delay marker can be inserted into the command sequence, once
pxafb_smart_queue() detects this, it flushes the previous commands and
delay for a specified number of milliseconds.

Signed-off-by: Eric Miao <eric.miao@marvell.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/include/mach/regs-lcd.h b/arch/arm/mach-pxa/include/mach/regs-lcd.h
index c689c4ea769c..f817878d256b 100644
--- a/arch/arm/mach-pxa/include/mach/regs-lcd.h
+++ b/arch/arm/mach-pxa/include/mach/regs-lcd.h
@@ -177,4 +177,11 @@
 
 #define SMART_CMD(x)    (SMART_CMD_WRITE_COMMAND | ((x) & 0xff))
 #define SMART_DAT(x)    (SMART_CMD_WRITE_DATA | ((x) & 0xff))
+
+/* SMART_DELAY() is introduced for software controlled delay primitive which
+ * can be inserted between command sequences, unused command 0x6 is used here
+ * and delay ranges from 0ms ~ 255ms
+ */
+#define SMART_CMD_DELAY         (0x6 << 9)
+#define SMART_DELAY(ms)         (SMART_CMD_DELAY | ((ms) & 0xff))
 #endif /* __ASM_ARCH_REGS_LCD_H */