diff options
| author | Liu Ying <Ying.Liu@freescale.com> | 2014-02-28 15:12:25 +0800 |
|---|---|---|
| committer | Anatolij Gustschin <agust@denx.de> | 2014-08-11 17:31:41 +0200 |
| commit | e66866c542e492c42f04cfc2e59317203b7cd6ea (patch) | |
| tree | 7b9f9ab94172bb0eb046029f7b4bd821ba0f0f91 /drivers/video/ipu_disp.c | |
| parent | 3c5fabd13993172e6c29500cc78de8ef7c1abbc0 (diff) | |
video: ipu_disp: wait for DP SF end irq when disabling sync BG flows
Instead of waiting for DC triple buffer to be cleared, this patch
changes to wait for a relevant DP sync flow end interrupt to come
when disabling sync BG flows. In this way, we align the implement
to the freescale internal IPUv3 driver. After applying this patch,
an uboot hang up issue at the arch_preboot_os() stage, where we
disable a relevant ipu display channel, is not observed any more on
some MX6DL platforms.
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Diffstat (limited to 'drivers/video/ipu_disp.c')
| -rw-r--r-- | drivers/video/ipu_disp.c | 27 |
1 files changed, 8 insertions, 19 deletions
diff --git a/drivers/video/ipu_disp.c b/drivers/video/ipu_disp.c index cefd2dc14a..bf39a517fa 100644 --- a/drivers/video/ipu_disp.c +++ b/drivers/video/ipu_disp.c @@ -666,13 +666,16 @@ void ipu_dp_dc_disable(ipu_channel_t channel, unsigned char swap) uint32_t csc; uint32_t dc_chan = 0; int timeout = 50; + int irq = 0; dc_swap = swap; if (channel == MEM_DC_SYNC) { dc_chan = 1; + irq = IPU_IRQ_DC_FC_1; } else if (channel == MEM_BG_SYNC) { dc_chan = 5; + irq = IPU_IRQ_DP_SF_END; } else if (channel == MEM_FG_SYNC) { /* Disable FG channel */ dc_chan = 5; @@ -723,25 +726,11 @@ void ipu_dp_dc_disable(ipu_channel_t channel, unsigned char swap) reg ^= DC_WR_CH_CONF_PROG_DI_ID; __raw_writel(reg, DC_WR_CH_CONF(dc_chan)); } else { - timeout = 50; - - /* Wait for DC triple buffer to empty */ - if (g_dc_di_assignment[dc_chan] == 0) - while ((__raw_readl(DC_STAT) & 0x00000002) - != 0x00000002) { - udelay(2000); - timeout -= 2; - if (timeout <= 0) - break; - } - else if (g_dc_di_assignment[dc_chan] == 1) - while ((__raw_readl(DC_STAT) & 0x00000020) - != 0x00000020) { - udelay(2000); - timeout -= 2; - if (timeout <= 0) - break; - } + /* Make sure that we leave at the irq starting edge */ + __raw_writel(IPUIRQ_2_MASK(irq), IPUIRQ_2_STATREG(irq)); + do { + reg = __raw_readl(IPUIRQ_2_STATREG(irq)); + } while (!(reg & IPUIRQ_2_MASK(irq))); reg = __raw_readl(DC_WR_CH_CONF(dc_chan)); reg &= ~DC_WR_CH_CONF_PROG_TYPE_MASK; |