From 8250262b93c400321570f50f5e9965b22cae67ab Mon Sep 17 00:00:00 2001
From: Marijn Suijten <marijn.suijten@somainline.org>
Date: Wed, 23 Feb 2022 12:40:10 +0100
Subject: drm/msm/dpu: Bind pingpong block to intf on active ctls in cmd
 encoder
Git-commit: f271d3bfeba99b8af373d10343b02769febd8762
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

As per the specification of DPU_CTL_ACTIVE_CFG the configuration of
active blocks should be proactively specified, and the pingpong block is
no different.

The downstream display driver [1] confirms this by also calling
bind_pingpong_blk on CTL_ACTIVE_CFG.  Note that this else-if is always
entered, as setup_intf_cfg - unlike this mainline dpu driver that
combines both behind the same function pointer - is left NULL in favour
of using setup_intf_cfg_v1 when CTL_ACTIVE_CFG is set.

This solves continuous timeouts on at least the Qualcomm sm6125 SoC:

    [drm:dpu_encoder_frame_done_timeout:2091] [dpu error]enc31 frame done timeout
    [drm:_dpu_encoder_phys_cmd_handle_ppdone_timeout.isra.0] *ERROR* id:31 pp:0 kickoff timeout 0 cnt 1 koff_cnt 1
    [drm:dpu_encoder_phys_cmd_prepare_for_kickoff] *ERROR* failed wait_for_idle: id:31 ret:-110 pp:0

In the same way this pingpong block should also be unbound followed by
an interface flush when the encoder is disabled, according to the
downstream display driver [2].

[1]: https://source.codeaurora.org/quic/la/platform/vendor/opensource/display-drivers/tree/msm/sde/sde_encoder_phys_cmd.c?h=LA.UM.9.16.r1-08500-MANNAR.0#n167
[2]: https://source.codeaurora.org/quic/la/platform/vendor/opensource/display-drivers/tree/msm/sde/sde_encoder.c?h=LA.UM.9.16.r1-08500-MANNAR.0#n2986

Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/475874/
Link: https://lore.kernel.org/r/20220223114011.219044-1-marijn.suijten@somainline.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 .../drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c  | 19 +++++++++++++++++++
 1 file changed, 19 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 5e9c434dcb2e..ae28b2b93e69 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
@@ -62,6 +62,13 @@ static void _dpu_encoder_phys_cmd_update_intf_cfg(
 	intf_cfg.stream_sel = cmd_enc->stream_sel;
 	intf_cfg.mode_3d = dpu_encoder_helper_get_3d_blend_mode(phys_enc);
 	ctl->ops.setup_intf_cfg(ctl, &intf_cfg);
+
+	/* setup which pp blk will connect to this intf */
+	if (test_bit(DPU_CTL_ACTIVE_CFG, &ctl->caps->features) && phys_enc->hw_intf->ops.bind_pingpong_blk)
+		phys_enc->hw_intf->ops.bind_pingpong_blk(
+				phys_enc->hw_intf,
+				true,
+				phys_enc->hw_pp->idx);
 }
 
 static void dpu_encoder_phys_cmd_pp_tx_done_irq(void *arg, int irq_idx)
@@ -498,6 +505,7 @@ static void dpu_encoder_phys_cmd_disable(struct dpu_encoder_phys *phys_enc)
 {
 	struct dpu_encoder_phys_cmd *cmd_enc =
 		to_dpu_encoder_phys_cmd(phys_enc);
+	struct dpu_hw_ctl *ctl;
 
 	if (!phys_enc->hw_pp) {
 		DPU_ERROR("invalid encoder\n");
@@ -514,6 +522,17 @@ static void dpu_encoder_phys_cmd_disable(struct dpu_encoder_phys *phys_enc)
 
 	if (phys_enc->hw_pp->ops.enable_tearcheck)
 		phys_enc->hw_pp->ops.enable_tearcheck(phys_enc->hw_pp, false);
+
+	if (phys_enc->hw_intf->ops.bind_pingpong_blk) {
+		phys_enc->hw_intf->ops.bind_pingpong_blk(
+				phys_enc->hw_intf,
+				false,
+				phys_enc->hw_pp->idx);
+
+		ctl = phys_enc->hw_ctl;
+		ctl->ops.update_pending_flush_intf(ctl, phys_enc->intf_idx);
+	}
+
 	phys_enc->enable_state = DPU_ENC_DISABLED;
 }
 
-- 
2.38.1