[PATCH v4 2/4] drm/msm/dpu: Enable widebus for DSI INTF

[Jessica Zhang]

DPU supports a data-bus widen mode for DSI INTF.

Enable this mode for all supported chipsets if widebus is enabled for DSI.

Signed-off-by: Jessica Zhang <quic_jesszhan at quicinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c          | 7 +++++--
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 2 ++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c          | 7 +++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h          | 1 +
 drivers/gpu/drm/msm/dsi/dsi.c                        | 5 +++++
 drivers/gpu/drm/msm/msm_drv.h                        | 5 +++++
 6 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 3dcd37c48aac..d4a21f172aba 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -1196,15 +1196,18 @@ static void dpu_encoder_virt_atomic_enable(struct drm_encoder *drm_enc,
 	struct drm_display_mode *cur_mode = NULL;
 	struct msm_drm_private *priv = drm_enc->dev->dev_private;
 	struct msm_display_info *disp_info;
+	int index;
 
 	dpu_enc = to_dpu_encoder_virt(drm_enc);
 	disp_info = &dpu_enc->disp_info;
+	index = disp_info->h_tile_instance[0];
 
 	dpu_enc->dsc = dpu_encoder_get_dsc_config(drm_enc);
 
 	if (disp_info->intf_type == INTF_DP)
-		dpu_enc->wide_bus_en = msm_dp_wide_bus_available(
-				priv->dp[disp_info->h_tile_instance[0]]);
+		dpu_enc->wide_bus_en = msm_dp_wide_bus_available(priv->dp[index]);
+	else if (disp_info->intf_type == INTF_DSI)
+		dpu_enc->wide_bus_en = msm_dsi_wide_bus_enabled(priv->dsi[index]);
 
 	mutex_lock(&dpu_enc->enc_lock);
 	cur_mode = &dpu_enc->base.crtc->state->adjusted_mode;
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 df88358e7037..29a5f88a12ee 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
@@ -72,6 +72,8 @@ static void _dpu_encoder_phys_cmd_update_intf_cfg(
 	if (intf_cfg.dsc != 0)
 		cmd_mode_cfg.data_compress = true;
 
+	cmd_mode_cfg.wide_bus_en = dpu_encoder_is_widebus_enabled(phys_enc->parent);
+
 	if (phys_enc->hw_intf->ops.program_intf_cmd_cfg)
 		phys_enc->hw_intf->ops.program_intf_cmd_cfg(phys_enc->hw_intf, &cmd_mode_cfg);
 }
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
index 8ec6505d9e78..5dcc83dd47ef 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -521,6 +521,9 @@ static void dpu_hw_intf_program_intf_cmd_cfg(struct dpu_hw_intf *ctx,
 	if (cmd_mode_cfg->data_compress)
 		intf_cfg2 |= INTF_CFG2_DCE_DATA_COMPRESS;
 
+	if (cmd_mode_cfg->wide_bus_en)
+		intf_cfg2 |= INTF_CFG2_DATABUS_WIDEN;
+
 	DPU_REG_WRITE(&ctx->hw, INTF_CONFIG2, intf_cfg2);
 }
 
@@ -545,6 +548,10 @@ static void _setup_intf_ops(struct dpu_hw_intf_ops *ops,
 		ops->disable_autorefresh = dpu_hw_intf_disable_autorefresh;
 	}
 
+	/* Technically, INTF_CONFIG2 is present for DPU 5.0+, but
+	 * we can configure it for DPU 7.0+ since the wide bus and DSC flags
+	 * would not be set for DPU < 7.0 anyways
+	 */
 	if (mdss_rev->core_major_ver >= 7)
 		ops->program_intf_cmd_cfg = dpu_hw_intf_program_intf_cmd_cfg;
 }
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
index 77f80531782b..c539025c418b 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
@@ -50,6 +50,7 @@ struct dpu_hw_intf_status {
 
 struct dpu_hw_intf_cmd_mode_cfg {
 	u8 data_compress;	/* enable data compress between dpu and dsi */
+	u8 wide_bus_en;		/* enable databus widen mode */
 };
 
 /**
diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
index baab79ab6e74..4cf424b3509f 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.c
+++ b/drivers/gpu/drm/msm/dsi/dsi.c
@@ -17,6 +17,11 @@ struct drm_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi)
 	return msm_dsi_host_get_dsc_config(msm_dsi->host);
 }
 
+bool msm_dsi_wide_bus_enabled(struct msm_dsi *msm_dsi)
+{
+	return false;
+}
+
 static int dsi_get_phy(struct msm_dsi *msm_dsi)
 {
 	struct platform_device *pdev = msm_dsi->pdev;
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 9d9d5e009163..1f37be53c281 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -344,6 +344,7 @@ void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi
 bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi);
 bool msm_dsi_is_bonded_dsi(struct msm_dsi *msm_dsi);
 bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi);
+bool msm_dsi_wide_bus_enabled(struct msm_dsi *msm_dsi);
 struct drm_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi);
 #else
 static inline void __init msm_dsi_register(void)
@@ -373,6 +374,10 @@ static inline bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi)
 {
 	return false;
 }
+static inline bool msm_dsi_wide_bus_enabled(struct msm_dsi *msm_dsi)
+{
+	return false;
+}
 
 static inline struct drm_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi)
 {

-- 
2.42.0