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video: atmel_hlcdfb: enable dcache support 

To support dcache, we need flush DMA descriptor buffer before enable lcd
DMA.

Also we need call lcd_set_flush_dcache(1) to make lcd driver flush the
lcd buffer if there is any change.

Cc: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Josh Wu <josh.wu@atmel.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
This commit is contained in:
Wu, Josh 2014-05-19 19:51:27 +08:00 committed by Andreas Bießmann
parent 5ae0e38278
commit b137bd8c8d
1 changed files with 6 additions and 0 deletions
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6
drivers/video/atmel_hlcdfb.c
View File

@ -171,6 +171,9 @@ void lcd_ctrl_init(void *lcdbase)
| LCDC_BASECTRL_DMAIEN | LCDC_BASECTRL_DFETCH;
desc->next = (u32)desc;
/* Flush the DMA descriptor if we enabled dcache */
flush_dcache_range((u32)desc, (u32)desc + sizeof(*desc));
lcdc_writel(&regs->lcdc_baseaddr, desc->address);
lcdc_writel(&regs->lcdc_basectrl, desc->control);
lcdc_writel(&regs->lcdc_basenext, desc->next);
@ -194,4 +197,7 @@ void lcd_ctrl_init(void *lcdbase)
lcdc_writel(&regs->lcdc_lcden, value | LCDC_LCDEN_PWMEN);
while (!(lcdc_readl(&regs->lcdc_lcdsr) & LCDC_LCDSR_PWMSTS))
udelay(1);
/* Enable flushing if we enabled dcache */
lcd_set_flush_dcache(1);
}