ENGR00153761 imx6q ipuv3: improve display quality

to avoid ipu starvation issue.
1. enable IPU AXI cache in uboot
2. set Qos to 7 for IPU to highest priority in uboot.
3. set AXI id to 0 for high priority IDMA channel in linux.

Signed-off-by: Jason Chen <b02280@freescale.com>

diff --git a/drivers/mxc/ipu3/ipu_common.c b/drivers/mxc/ipu3/ipu_common.c
index 7927665c92a6423a31752f750bc7acb3fa940db2..db35c2995b9560ec56a13e5ba4202f475aaa0d50 100644 (file)
--- a/drivers/mxc/ipu3/ipu_common.c
+++ b/drivers/mxc/ipu3/ipu_common.c
@@ -1368,7 +1368,8 @@ int32_t ipu_init_channel_buffer(struct ipu_soc *ipu, ipu_channel_t channel,
                _ipu_smfc_set_burst_size(ipu, channel, burst_size-1);
        }
 
-       if (idma_is_set(ipu, IDMAC_CHA_PRI, dma_chan) && !cpu_is_mx53())
+       if (idma_is_set(ipu, IDMAC_CHA_PRI, dma_chan) && !cpu_is_mx53()
+               && !cpu_is_mx6q())
                _ipu_ch_param_set_high_priority(ipu, dma_chan);
 
        _ipu_ch_param_dump(ipu, dma_chan);