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From:   Kuogee Hsieh <quic_khsieh@quicinc.com>
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CC:     Kuogee Hsieh <quic_khsieh@quicinc.com>,
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        <linux-kernel@vger.kernel.org>
Subject: [PATCH v10 8/8] drm/msm/dpu: tear down DSC data path when DSC disabled
Date:   Wed, 17 May 2023 15:01:59 -0700
Message-ID: <1684360919-28458-9-git-send-email-quic_khsieh@quicinc.com>
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References: <1684360919-28458-1-git-send-email-quic_khsieh@quicinc.com>
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Unset DSC_ACTIVE bit at dpu_hw_ctl_reset_intf_cfg_v1(),
dpu_encoder_unprep_dsc() and dpu_encoder_dsc_pipe_clr() functions
to tear down DSC data path if DSC data path was setup previous.

Changes in V10:
-- pass ctl directly instead of dpu_enc to dsc_pipe_cfg()
-- move both dpu_encoder_unprep_dsc() and dpu_encoder_dsc_pipe_clr() to above phys_cleanup()

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 39 +++++++++++++++++++++++++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c  |  7 ++++++
 2 files changed, 46 insertions(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 1957545..ec2a55a6 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -2036,6 +2036,41 @@ static void dpu_encoder_helper_reset_mixers(struct dpu_encoder_phys *phys_enc)
 	}
 }
 
+static void dpu_encoder_dsc_pipe_clr(struct dpu_hw_ctl *ctl,
+				     struct dpu_hw_dsc *hw_dsc,
+				     struct dpu_hw_pingpong *hw_pp)
+{
+	if (hw_dsc->ops.dsc_disable)
+		hw_dsc->ops.dsc_disable(hw_dsc);
+
+	if (hw_pp->ops.disable_dsc)
+		hw_pp->ops.disable_dsc(hw_pp);
+
+	if (hw_dsc->ops.dsc_bind_pingpong_blk)
+		hw_dsc->ops.dsc_bind_pingpong_blk(hw_dsc, PINGPONG_NONE);
+
+	if (ctl->ops.update_pending_flush_dsc)
+		ctl->ops.update_pending_flush_dsc(ctl, hw_dsc->idx);
+}
+
+static void dpu_encoder_unprep_dsc(struct dpu_encoder_virt *dpu_enc)
+{
+	/* coding only for 2LM, 2enc, 1 dsc config */
+	struct dpu_encoder_phys *enc_master = dpu_enc->cur_master;
+	struct dpu_hw_ctl *ctl = enc_master->hw_ctl;
+	struct dpu_hw_dsc *hw_dsc[MAX_CHANNELS_PER_ENC];
+	struct dpu_hw_pingpong *hw_pp[MAX_CHANNELS_PER_ENC];
+	int i;
+
+	for (i = 0; i < MAX_CHANNELS_PER_ENC; i++) {
+		hw_pp[i] = dpu_enc->hw_pp[i];
+		hw_dsc[i] = dpu_enc->hw_dsc[i];
+
+		if (hw_pp[i] && hw_dsc[i])
+			dpu_encoder_dsc_pipe_clr(ctl, hw_dsc[i], hw_pp[i]);
+	}
+}
+
 void dpu_encoder_helper_phys_cleanup(struct dpu_encoder_phys *phys_enc)
 {
 	struct dpu_hw_ctl *ctl = phys_enc->hw_ctl;
@@ -2086,8 +2121,12 @@ void dpu_encoder_helper_phys_cleanup(struct dpu_encoder_phys *phys_enc)
 					phys_enc->hw_pp->merge_3d->idx);
 	}
 
+	if (dpu_enc->dsc)
+		dpu_encoder_unprep_dsc(dpu_enc);
+
 	intf_cfg.stream_sel = 0; /* Don't care value for video mode */
 	intf_cfg.mode_3d = dpu_encoder_helper_get_3d_blend_mode(phys_enc);
+	intf_cfg.dsc = dpu_encoder_helper_get_dsc(phys_enc);
 
 	if (phys_enc->hw_intf)
 		intf_cfg.intf = phys_enc->hw_intf->idx;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
index 4e132d9..2663626 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
@@ -578,6 +578,7 @@ static void dpu_hw_ctl_reset_intf_cfg_v1(struct dpu_hw_ctl *ctx,
 	u32 intf_active = 0;
 	u32 wb_active = 0;
 	u32 merge3d_active = 0;
+	u32 dsc_active;
 
 	/*
 	 * This API resets each portion of the CTL path namely,
@@ -607,6 +608,12 @@ static void dpu_hw_ctl_reset_intf_cfg_v1(struct dpu_hw_ctl *ctx,
 		wb_active &= ~BIT(cfg->wb - WB_0);
 		DPU_REG_WRITE(c, CTL_WB_ACTIVE, wb_active);
 	}
+
+	if (cfg->dsc) {
+		dsc_active = DPU_REG_READ(c, CTL_DSC_ACTIVE);
+		dsc_active &= ~cfg->dsc;
+		DPU_REG_WRITE(c, CTL_DSC_ACTIVE, dsc_active);
+	}
 }
 
 static void dpu_hw_ctl_set_fetch_pipe_active(struct dpu_hw_ctl *ctx,
-- 
2.7.4