5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Marijn Suijten <marijn.suijten@xxxxxxxxxxxxxx> [ Upstream commit 2b938c3ab0a69ec6ea587bbf6fc2aec3db4a8736 ] As we can clearly see in a downstream kernel [1], flushing the slave INTF is skipped /only if/ the PPSPLIT topology is active. However, when DPU was originally submitted to mainline PPSPLIT was no longer part of it (seems to have been ripped out before submission), but this clause was incorrectly ported from the original SDE driver. Given that there is no support for PPSPLIT (currently), flushing the slave INTF should /never/ be skipped (as the `if (ppsplit && !master) goto skip;` clause downstream never becomes true). [1]: https://git.codelinaro.org/clo/la/platform/vendor/opensource/display-drivers/-/blob/display-kernel.lnx.5.4.r1-rel/msm/sde/sde_encoder_phys_cmd.c?ref_type=heads#L1131-1139 Fixes: 25fdd5933e4c ("drm/msm: Add SDM845 DPU support") Signed-off-by: Marijn Suijten <marijn.suijten@xxxxxxxxxxxxxx> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Patchwork: https://patchwork.freedesktop.org/patch/589901/ Link: https://lore.kernel.org/r/20240417-drm-msm-initial-dualpipe-dsc-fixes-v1-3-78ae3ee9a697@xxxxxxxxxxxxxx Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 3 --- 1 file changed, 3 deletions(-) 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 2923b63d95fec..34b39a475e3e6 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 @@ -479,9 +479,6 @@ static void dpu_encoder_phys_cmd_enable_helper( _dpu_encoder_phys_cmd_pingpong_config(phys_enc); - if (!dpu_encoder_phys_cmd_is_master(phys_enc)) - return; - ctl = phys_enc->hw_ctl; ctl->ops.get_bitmask_intf(ctl, &flush_mask, phys_enc->intf_idx); ctl->ops.update_pending_flush(ctl, flush_mask); -- 2.43.0
