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| author | Eric Miao <eric.miao@marvell.com> | 2008-12-08 18:46:00 +0800 |
|---|---|---|
| committer | Eric Miao <eric.miao@marvell.com> | 2008-12-17 22:50:52 +0800 |
| commit | 69bdea7047fbac88beb8b7ba9e428c4f0e53f563 (patch) | |
| tree | db4b378ef239087317cd0b4f8ba4c9d7ed8d638a | |
| parent | c1f99c215c58111629984a49ba87b2b145dd1f5b (diff) | |
| download | kernel_samsung_smdk4412-69bdea7047fbac88beb8b7ba9e428c4f0e53f563.zip kernel_samsung_smdk4412-69bdea7047fbac88beb8b7ba9e428c4f0e53f563.tar.gz kernel_samsung_smdk4412-69bdea7047fbac88beb8b7ba9e428c4f0e53f563.tar.bz2 | |
[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>
| -rw-r--r-- | arch/arm/mach-pxa/include/mach/regs-lcd.h | 7 | ||||
| -rw-r--r-- | drivers/video/pxafb.c | 13 |
2 files changed, 17 insertions, 3 deletions
diff --git a/arch/arm/mach-pxa/include/mach/regs-lcd.h b/arch/arm/mach-pxa/include/mach/regs-lcd.h index c689c4e..f817878 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 */ diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c index d6de84b..1e1c4ec 100644 --- a/drivers/video/pxafb.c +++ b/drivers/video/pxafb.c @@ -723,12 +723,19 @@ int pxafb_smart_queue(struct fb_info *info, uint16_t *cmds, int n_cmds) int i; struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb); - /* leave 2 commands for INTERRUPT and WAIT_FOR_SYNC */ - for (i = 0; i < n_cmds; i++) { + for (i = 0; i < n_cmds; i++, cmds++) { + /* if it is a software delay, flush and delay */ + if ((*cmds & 0xff00) == SMART_CMD_DELAY) { + pxafb_smart_flush(info); + mdelay(*cmds & 0xff); + continue; + } + + /* leave 2 commands for INTERRUPT and WAIT_FOR_SYNC */ if (fbi->n_smart_cmds == CMD_BUFF_SIZE - 8) pxafb_smart_flush(info); - fbi->smart_cmds[fbi->n_smart_cmds++] = *cmds++; + fbi->smart_cmds[fbi->n_smart_cmds++] = *cmds; } return 0; |