diff options
Diffstat (limited to 'drivers/gpu/imx/ipu-v3/ipu-pre.c')
| -rw-r--r-- | drivers/gpu/imx/ipu-v3/ipu-pre.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/imx/ipu-v3/ipu-pre.c b/drivers/gpu/imx/ipu-v3/ipu-pre.c index 1d1612e28854..6fd4af647f59 100644 --- a/drivers/gpu/imx/ipu-v3/ipu-pre.c +++ b/drivers/gpu/imx/ipu-v3/ipu-pre.c @@ -102,6 +102,7 @@ struct ipu_pre { void *buffer_virt; bool in_use; unsigned int safe_window_end; + unsigned int last_bufaddr; }; static DEFINE_MUTEX(ipu_pre_list_mutex); @@ -177,6 +178,7 @@ void ipu_pre_configure(struct ipu_pre *pre, unsigned int width, writel(bufaddr, pre->regs + IPU_PRE_CUR_BUF); writel(bufaddr, pre->regs + IPU_PRE_NEXT_BUF); + pre->last_bufaddr = bufaddr; val = IPU_PRE_PREF_ENG_CTRL_INPUT_PIXEL_FORMAT(0) | IPU_PRE_PREF_ENG_CTRL_INPUT_ACTIVE_BPP(active_bpp) | @@ -218,7 +220,11 @@ void ipu_pre_update(struct ipu_pre *pre, unsigned int bufaddr) unsigned short current_yblock; u32 val; + if (bufaddr == pre->last_bufaddr) + return; + writel(bufaddr, pre->regs + IPU_PRE_NEXT_BUF); + pre->last_bufaddr = bufaddr; do { if (time_after(jiffies, timeout)) { |