linux-kernel - [PATCH 2/3] drm/msm/dpu: Set DATABUS

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Message-ID: <20230525-add-widebus-support-v1-2-c7069f2efca1@quicinc.com>
Date:   Tue, 13 Jun 2023 18:57:12 -0700
From:   Jessica Zhang <quic_jesszhan@...cinc.com>
To:     Rob Clark <robdclark@...il.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Marijn Suijten <marijn.suijten@...ainline.org>
CC:     Jessica Zhang <quic_jesszhan@...cinc.com>,
        <quic_abhinavk@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/3] drm/msm/dpu: Set DATABUS_WIDEN on command mode encoders

Add a DPU INTF op to set the DATABUS_WIDEN register to enable the
databus-widen mode datapath.

Signed-off-by: Jessica Zhang <quic_jesszhan@...cinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c |  3 +++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c          | 12 ++++++++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h          |  3 +++
 3 files changed, 18 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 b856c6286c85..124ba96bebda 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
@@ -70,6 +70,9 @@ static void _dpu_encoder_phys_cmd_update_intf_cfg(
 
 	if (intf_cfg.dsc != 0 && phys_enc->hw_intf->ops.enable_compression)
 		phys_enc->hw_intf->ops.enable_compression(phys_enc->hw_intf);
+
+	if (phys_enc->hw_intf->ops.enable_widebus)
+		phys_enc->hw_intf->ops.enable_widebus(phys_enc->hw_intf);
 }
 
 static void dpu_encoder_phys_cmd_pp_tx_done_irq(void *arg, int irq_idx)
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 5b0f6627e29b..03ba3a1c7a46 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -513,6 +513,15 @@ static void dpu_hw_intf_disable_autorefresh(struct dpu_hw_intf *intf,
 
 }
 
+static void dpu_hw_intf_enable_widebus(struct dpu_hw_intf *ctx)
+{
+	u32 intf_cfg2 = DPU_REG_READ(&ctx->hw, INTF_CONFIG2);
+
+	intf_cfg2 |= INTF_CFG2_DATABUS_WIDEN;
+
+	DPU_REG_WRITE(&ctx->hw, INTF_CONFIG2, intf_cfg2);
+}
+
 static void dpu_hw_intf_enable_compression(struct dpu_hw_intf *ctx)
 {
 	u32 intf_cfg2 = DPU_REG_READ(&ctx->hw, INTF_CONFIG2);
@@ -545,6 +554,9 @@ static void _setup_intf_ops(struct dpu_hw_intf_ops *ops,
 
 	if (cap & BIT(DPU_INTF_DATA_COMPRESS))
 		ops->enable_compression = dpu_hw_intf_enable_compression;
+
+	if (cap & BIT(DPU_INTF_DATABUS_WIDEN))
+		ops->enable_widebus = dpu_hw_intf_enable_widebus;
 }
 
 struct dpu_hw_intf *dpu_hw_intf_init(const struct dpu_intf_cfg *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 99e21c4137f9..64a17b99d3d1 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
@@ -71,6 +71,7 @@ struct intf_status {
  *                              Return: 0 on success, -ETIMEDOUT on timeout
  * @vsync_sel:                  Select vsync signal for tear-effect configuration
  * @enable_compression:         Enable data compression
+ * @enable_widebus:             Enable widebus
  */
 struct dpu_hw_intf_ops {
 	void (*setup_timing_gen)(struct dpu_hw_intf *intf,
@@ -109,6 +110,8 @@ struct dpu_hw_intf_ops {
 	void (*disable_autorefresh)(struct dpu_hw_intf *intf, uint32_t encoder_id, u16 vdisplay);
 
 	void (*enable_compression)(struct dpu_hw_intf *intf);
+
+	void (*enable_widebus)(struct dpu_hw_intf *intf);
 };
 
 struct dpu_hw_intf {

-- 
2.40.1