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Commit 69bdea70 authored by Eric Miao's avatar Eric Miao
Browse files

[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: default avatarEric Miao <eric.miao@marvell.com>
parent c1f99c21

arch/arm/mach-pxa/include/mach/regs-lcd.h

+7 −0
Original line number Diff line number Diff line
@@ -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 */

drivers/video/pxafb.c

+10 −3
Original line number Diff line number Diff line
@@ -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);



	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 */

	for (i = 0; i < n_cmds; i++) {

		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;