linux-kernel - [PATCH v4 4/5] drm/msm/dpu: Set DATA

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Message-ID: <20230405-add-dsc-support-v4-4-15daf84f8dcb@quicinc.com>
Date:   Mon, 22 May 2023 13:30:23 -0700
From:   Jessica Zhang <quic_jesszhan@...cinc.com>
To:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.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:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        Jessica Zhang <quic_jesszhan@...cinc.com>
Subject: [PATCH v4 4/5] drm/msm/dpu: Set DATA_COMPRESS for command mode

Add a DPU INTF op to set DATA_COMPRESS register if the
DPU_INTF_DATA_COMPRESS feature is enabled. This bit needs to be set in
order for DSC v1.2 to work.

Note: For now, this op is called for command mode encoders only. Changes to
set DATA_COMPRESS for video mode encoders will be posted along with DSC
v1.2 support for DP.

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          | 13 +++++++++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h          |  2 ++
 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 d8ed85a238af..1a4c20f02312 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
@@ -68,6 +68,9 @@ static void _dpu_encoder_phys_cmd_update_intf_cfg(
 				phys_enc->hw_intf,
 				true,
 				phys_enc->hw_pp->idx);
+
+	if (phys_enc->hw_intf->ops.enable_compression)
+		phys_enc->hw_intf->ops.enable_compression(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 6485500eedb8..a462c6780e6e 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -91,6 +91,7 @@
 
 #define INTF_CFG2_DATABUS_WIDEN	BIT(0)
 #define INTF_CFG2_DATA_HCTL_EN	BIT(4)
+#define INTF_CFG2_DCE_DATA_COMPRESS     BIT(12)
 
 static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 		const struct intf_timing_params *p,
@@ -522,6 +523,15 @@ static void dpu_hw_intf_disable_autorefresh(struct dpu_hw_intf *intf,
 
 }
 
+static void dpu_hw_intf_enable_compression(struct dpu_hw_intf *ctx)
+{
+	u32 intf_cfg2 = DPU_REG_READ(&ctx->hw, INTF_CONFIG2);
+
+	intf_cfg2 |= INTF_CFG2_DCE_DATA_COMPRESS;
+
+	DPU_REG_WRITE(&ctx->hw, INTF_CONFIG2, intf_cfg2);
+}
+
 static void _setup_intf_ops(struct dpu_hw_intf_ops *ops,
 		unsigned long cap)
 {
@@ -542,6 +552,9 @@ static void _setup_intf_ops(struct dpu_hw_intf_ops *ops,
 		ops->vsync_sel = dpu_hw_intf_vsync_sel;
 		ops->disable_autorefresh = dpu_hw_intf_disable_autorefresh;
 	}
+
+	if (cap & BIT(DPU_INTF_DATA_COMPRESS))
+		ops->enable_compression = dpu_hw_intf_enable_compression;
 }
 
 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 73b0885918f8..72fe907729f1 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
@@ -70,6 +70,7 @@ struct intf_status {
  * @get_autorefresh:            Retrieve autorefresh config from hardware
  *                              Return: 0 on success, -ETIMEDOUT on timeout
  * @vsync_sel:                  Select vsync signal for tear-effect configuration
+ * @enable_compression:         Enable data compression
  */
 struct dpu_hw_intf_ops {
 	void (*setup_timing_gen)(struct dpu_hw_intf *intf,
@@ -107,6 +108,7 @@ struct dpu_hw_intf_ops {
 	 * Disable autorefresh if enabled
 	 */
 	void (*disable_autorefresh)(struct dpu_hw_intf *intf, uint32_t encoder_id, u16 vdisplay);
+	void (*enable_compression)(struct dpu_hw_intf *intf);
 };
 
 struct dpu_hw_intf {

-- 
2.40.1