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[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>
This commit is contained in:
Eric Miao 2008-12-08 18:46:00 +08:00
parent c1f99c215c
commit 69bdea7047
2 changed files with 17 additions and 3 deletions
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7
arch/arm/mach-pxa/include/mach/regs-lcd.h
View File

@ -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 */

13
drivers/video/pxafb.c
View File

@ -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;