Hi Angelo! On 2021-09-01 19:43:47, AngeloGioacchino Del Regno wrote: > In function dpu_encoder_phys_cmd_wait_for_commit_done we are always > checking if the relative CTL is started by waiting for an interrupt > to fire: it is fine to do that, but then sometimes we call this > function while the CTL is up and has never been put down, but that > interrupt gets raised only when the CTL gets a state change from > 0 to 1 (disabled to enabled), so we're going to wait for something > that will never happen on its own. > > Solving this while avoiding to restart the CTL is actually possible > and can be done by just checking if it is already up and running > when the wait_for_commit_done function is called: in this case, so, > if the CTL was already running, we can say that the commit is done > if the command transmission is complete (in other terms, if the > interface has been flushed). > > Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxxx> > --- > drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c > index aa01698d6b25..b5b1b555ac4e 100644 > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c > @@ -682,6 +682,9 @@ static int dpu_encoder_phys_cmd_wait_for_commit_done( > if (!dpu_encoder_phys_cmd_is_master(phys_enc)) > return 0; > > + if (phys_enc->hw_ctl->ops.is_started) > + return dpu_encoder_phys_cmd_wait_for_tx_complete(phys_enc); In the previous commit you introduced is_started to the ops struct as function pointer, and you probably intend to call it here instead of just checking whether it might be NULL. As far as I remember this was also the reason for previously mentioning that it was faulty and required a v2 in: https://lore.kernel.org/linux-arm-msm/bdc67afc-3736-5497-c43f-5165c55e0354@xxxxxxxxxxxxxx/ Thanks! - Marijn > + > return _dpu_encoder_phys_cmd_wait_for_ctl_start(phys_enc); > } > > -- > 2.32.0 >
