diff options
| author | Jason Chen <b02280@freescale.com> | 2010-11-01 10:42:04 +0800 |
|---|---|---|
| committer | Scott Sweeny <scott.sweeny@timesys.com> | 2011-01-19 11:50:17 -0500 |
| commit | 4a45394671ae2b0c049cb468dd63168706e3a186 (patch) | |
| tree | bb8f7c36cee0cac829ad2aa840c13cf39aa31aac /drivers | |
| parent | 6bbbb9f8a59f7b9d917a4cf0d55fa0ba93df17eb (diff) | |
ENGR00133034 ipuv3: fix black flash issue during high resolution video playback
When v4l2 using ic bypass mode, and format is non-interleaving, if
the resolution is large, like 720P on mx51, it has chance to make
screen black flash.
Need enlarge burst size of IDMA display for above case.
Signed-off-by: Jason Chen <b02280@freescale.com>
Signed-off-by: Ferderber Ran <r53561@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mxc/ipu3/ipu_common.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/mxc/ipu3/ipu_common.c b/drivers/mxc/ipu3/ipu_common.c index e65faa83fac3..87a7cf2c43ab 100644 --- a/drivers/mxc/ipu3/ipu_common.c +++ b/drivers/mxc/ipu3/ipu_common.c @@ -1032,6 +1032,53 @@ int32_t ipu_init_channel_buffer(ipu_channel_t channel, ipu_buffer_t type, _ipu_ch_param_set_burst_size(dma_chan, 8); _ipu_ch_param_set_block_mode(dma_chan); } else if (_ipu_is_dmfc_chan(dma_chan)) { + u32 dmfc_dp_chan, dmfc_wr_chan; + /* + * non-interleaving format need enlarge burst size + * to work-around black flash issue. + */ + if (((dma_chan == 23) || (dma_chan == 27) || (dma_chan == 28)) + && ((pixel_fmt == IPU_PIX_FMT_YUV420P) || + (pixel_fmt == IPU_PIX_FMT_YUV420P2) || + (pixel_fmt == IPU_PIX_FMT_YVU422P) || + (pixel_fmt == IPU_PIX_FMT_YUV422P) || + (pixel_fmt == IPU_PIX_FMT_NV12))) { + if (dma_chan == 23) { + dmfc_dp_chan = __raw_readl(DMFC_DP_CHAN); + dmfc_dp_chan &= ~(0xc0); + dmfc_dp_chan |= 0x40; + __raw_writel(dmfc_dp_chan, DMFC_DP_CHAN); + } else if (dma_chan == 27) { + dmfc_dp_chan = __raw_readl(DMFC_DP_CHAN); + dmfc_dp_chan &= ~(0xc000); + dmfc_dp_chan |= 0x4000; + __raw_writel(dmfc_dp_chan, DMFC_DP_CHAN); + } else if (dma_chan == 28) { + dmfc_wr_chan = __raw_readl(DMFC_WR_CHAN); + dmfc_wr_chan &= ~(0xc0); + dmfc_wr_chan |= 0x40; + __raw_writel(dmfc_wr_chan, DMFC_WR_CHAN); + } + _ipu_ch_param_set_burst_size(dma_chan, 64); + } else { + if (dma_chan == 23) { + dmfc_dp_chan = __raw_readl(DMFC_DP_CHAN); + dmfc_dp_chan &= ~(0xc0); + dmfc_dp_chan |= 0x80; + __raw_writel(dmfc_dp_chan, DMFC_DP_CHAN); + } else if (dma_chan == 27) { + dmfc_dp_chan = __raw_readl(DMFC_DP_CHAN); + dmfc_dp_chan &= ~(0xc000); + dmfc_dp_chan |= 0x8000; + __raw_writel(dmfc_dp_chan, DMFC_DP_CHAN); + } else { + dmfc_wr_chan = __raw_readl(DMFC_WR_CHAN); + dmfc_wr_chan &= ~(0xc0); + dmfc_wr_chan |= 0x80; + __raw_writel(dmfc_wr_chan, DMFC_WR_CHAN); + } + _ipu_ch_param_set_burst_size(dma_chan, 32); + } spin_lock_irqsave(&ipu_lock, lock_flags); _ipu_dmfc_set_wait4eot(dma_chan, width); spin_unlock_irqrestore(&ipu_lock, lock_flags); |