diff options
Diffstat (limited to 'arch/arm/plat-omap/dma.c')
| -rw-r--r-- | arch/arm/plat-omap/dma.c | 44 |
1 files changed, 37 insertions, 7 deletions
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index 015bd2cf869f..c0a5c2fa42bd 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -794,10 +794,6 @@ static void set_b1_regs(void) w = omap_readw(OMAP1610_DMA_LCD_CTRL); /* Always set the source port as SDRAM for now*/ w &= ~(0x03 << 6); - if (lcd_dma.ext_ctrl) - w |= 1 << 8; - else - w &= ~(1 << 8); if (lcd_dma.callback != NULL) w |= 1 << 1; /* Block interrupt enable */ else @@ -889,9 +885,15 @@ void omap_enable_lcd_dma(void) */ if (enable_1510_mode || !lcd_dma.ext_ctrl) return; + + w = omap_readw(OMAP1610_DMA_LCD_CTRL); + w |= 1 << 8; + omap_writew(w, OMAP1610_DMA_LCD_CTRL); + w = omap_readw(OMAP1610_DMA_LCD_CCR); w |= 1 << 7; omap_writew(w, OMAP1610_DMA_LCD_CCR); + lcd_dma.active = 1; } @@ -922,10 +924,19 @@ void omap_setup_lcd_dma(void) void omap_stop_lcd_dma(void) { + u16 w; + lcd_dma.active = 0; - if (!enable_1510_mode && lcd_dma.ext_ctrl) - omap_writew(omap_readw(OMAP1610_DMA_LCD_CCR) & ~(1 << 7), - OMAP1610_DMA_LCD_CCR); + if (enable_1510_mode || !lcd_dma.ext_ctrl) + return; + + w = omap_readw(OMAP1610_DMA_LCD_CCR); + w &= ~(1 << 7); + omap_writew(w, OMAP1610_DMA_LCD_CCR); + + w = omap_readw(OMAP1610_DMA_LCD_CTRL); + w &= ~(1 << 8); + omap_writew(w, OMAP1610_DMA_LCD_CTRL); } /* @@ -972,6 +983,25 @@ dma_addr_t omap_get_dma_dst_pos(int lch) (OMAP_DMA_CDSA_U(lch) << 16)); } +int omap_dma_running(void) +{ + int lch; + + /* Check if LCD DMA is running */ + if (cpu_is_omap16xx()) + if (omap_readw(OMAP1610_DMA_LCD_CCR) & OMAP_DMA_CCR_EN) + return 1; + + for (lch = 0; lch < dma_chan_count; lch++) { + u16 w; + + w = omap_readw(OMAP_DMA_CCR(lch)); + if (w & OMAP_DMA_CCR_EN) + return 1; + } + return 0; +} + static int __init omap_init_dma(void) { int ch, r; |