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Apply the lcd speed fix from fuze also to e200v2. Improves speed by a factor ~2.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22575 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dominik Wenger 2009-08-31 20:45:26 +00:00
parent 7dd548c697
commit a56199c49e
1 changed files with 30 additions and 9 deletions
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39
firmware/target/arm/as3525/sansa-e200v2/lcd-e200v2.c
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@ -130,15 +130,16 @@ static void ams3525_dbop_init(void)
/* TODO: The OF calls some other functions here, but maybe not important */
}
#define lcd_write_single_data16(value) do {\
DBOP_CTRL &= ~(1<<14|1<<13); \
DBOP_DOUT16 = (fb_data)(value); \
} while(0)
static void lcd_write_cmd(int cmd)
{
/* Write register */
DBOP_CTRL &= ~(1<<14);
DBOP_TIMPOL_23 = 0xa167006e;
DBOP_DOUT = cmd;
lcd_write_single_data16(cmd);
/* Wait for fifo to empty */
while ((DBOP_STAT & (1<<10)) == 0);
@ -152,13 +153,33 @@ static void lcd_write_cmd(int cmd)
void lcd_write_data(const fb_data* p_bytes, int count)
{
while (count--)
const long *data;
if ((int)p_bytes & 0x3)
{ /* need to do a single 16bit write beforehand if the address is */
/* not word aligned*/
lcd_write_single_data16(*p_bytes);
count--;p_bytes++;
}
/* from here, 32bit transfers are save */
/* set it to transfer 4*(outputwidth) units at a time, */
/* if bit 12 is set it only does 2 halfwords though */
DBOP_CTRL |= (1<<13|1<<14);
data = (long*)p_bytes;
while (count > 1)
{
DBOP_DOUT = *p_bytes++;
DBOP_DOUT32 = *data++;
count -= 2;
/* Wait for fifo to empty */
/* TODO: We should normally fill the fifo until it's full
* instead of waiting after each word,
* but that causes blue lines on the display */
while ((DBOP_STAT & (1<<10)) == 0);
}
/* due to the 32bit alignment requirement, we possibly need to do a
* 16bit transfer at the end also */
if (count > 0)
lcd_write_single_data16(*(fb_data*)data);
}
static void lcd_write_reg(int reg, int value)
@ -166,7 +187,7 @@ static void lcd_write_reg(int reg, int value)
fb_data data = value;
lcd_write_cmd(reg);
lcd_write_data(&data, 1);
lcd_write_single_data16(data);
}
/*** hardware configuration ***/
@ -555,6 +576,6 @@ bool lcd_button_support(void)
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
lcd_write_data(&data, 1);
lcd_write_single_data16(data);
return true;
}