Re: [PATCH] gpu: ipu-v3: pre: don't trigger update if buffer address doesn't change

2019-01-23 Thread Philipp Zabel
On Mon, 2019-01-07 at 12:58 +0100, Lucas Stach wrote: > Am Freitag, den 21.12.2018, 12:11 +0100 schrieb Philipp Zabel: > > Hi Lucas, > > > > > On Wed, Dec 19, 2018 at 4:40 PM Lucas Stach > > > wrote: > > > > > > On a NOP double buffer update where current buffer address is the same > > > as the

Re: [PATCH] gpu: ipu-v3: pre: don't trigger update if buffer address doesn't change

2019-01-07 Thread Lucas Stach
Am Freitag, den 21.12.2018, 12:11 +0100 schrieb Philipp Zabel: > Hi Lucas, > > > On Wed, Dec 19, 2018 at 4:40 PM Lucas Stach wrote: > > > > On a NOP double buffer update where current buffer address is the same > > as the next buffer address, the SDW_UPDATE bit clears too late. > > What does th

Re: [PATCH] gpu: ipu-v3: pre: don't trigger update if buffer address doesn't change

2018-12-21 Thread Philipp Zabel
Hi Lucas, On Wed, Dec 19, 2018 at 4:40 PM Lucas Stach wrote: > > On a NOP double buffer update where current buffer address is the same > as the next buffer address, the SDW_UPDATE bit clears too late. What does this mean, exactly? Does the hardware behave differently if the writel to IPU_PRE_NE

[PATCH] gpu: ipu-v3: pre: don't trigger update if buffer address doesn't change

2018-12-19 Thread Lucas Stach
On a NOP double buffer update where current buffer address is the same as the next buffer address, the SDW_UPDATE bit clears too late. As we are now using this bit to determine when it is safe to signal flip completion to userspace this will delay completion of atomic commits where one plane doesn'