drm/msm/dpu: Add MISR register support for interface

Add support for setting MISR registers within the interface

Changes since V1:
- Replaced dpu_hw_intf collect_misr and setup_misr implementations with
  calls to dpu_hw_utils helper methods

Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/490730/
Link: https://lore.kernel.org/r/20220622171835.7558-4-quic_jesszhan@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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 b2ca8d1..90613f7 100644 (file)
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
+/*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
  */
 
 #include "dpu_hwio.h"
@@ -67,6 +69,9 @@
 #define INTF_CFG2_DATABUS_WIDEN        BIT(0)
 #define INTF_CFG2_DATA_HCTL_EN BIT(4)
 
+#define INTF_MISR_CTRL                 0x180
+#define INTF_MISR_SIGNATURE            0x184
+
 static const struct dpu_intf_cfg *_intf_offset(enum dpu_intf intf,
                const struct dpu_mdss_cfg *m,
                void __iomem *addr,
@@ -318,6 +323,16 @@ static u32 dpu_hw_intf_get_line_count(struct dpu_hw_intf *intf)
        return DPU_REG_READ(c, INTF_LINE_COUNT);
 }
 
+static void dpu_hw_intf_setup_misr(struct dpu_hw_intf *intf, bool enable, u32 frame_count)
+{
+       dpu_hw_setup_misr(&intf->hw, INTF_MISR_CTRL, enable, frame_count);
+}
+
+static int dpu_hw_intf_collect_misr(struct dpu_hw_intf *intf, u32 *misr_value)
+{
+       return dpu_hw_collect_misr(&intf->hw, INTF_MISR_CTRL, INTF_MISR_SIGNATURE, misr_value);
+}
+
 static void _setup_intf_ops(struct dpu_hw_intf_ops *ops,
                unsigned long cap)
 {
@@ -328,6 +343,8 @@ static void _setup_intf_ops(struct dpu_hw_intf_ops *ops,
        ops->get_line_count = dpu_hw_intf_get_line_count;
        if (cap & BIT(DPU_INTF_INPUT_CTRL))
                ops->bind_pingpong_blk = dpu_hw_intf_bind_pingpong_blk;
+       ops->setup_misr = dpu_hw_intf_setup_misr;
+       ops->collect_misr = dpu_hw_intf_collect_misr;
 }
 
 struct dpu_hw_intf *dpu_hw_intf_init(enum dpu_intf idx,

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 7b2d96a..8d0e7b5 100644 (file)
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
@@ -1,5 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
+/*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
  */
 
 #ifndef _DPU_HW_INTF_H
@@ -57,6 +59,8 @@ struct intf_status {
  * @ get_line_count: reads current vertical line counter
  * @bind_pingpong_blk: enable/disable the connection with pingpong which will
  *                     feed pixels to this interface
+ * @setup_misr: enable/disable MISR
+ * @collect_misr: read MISR signature
  */
 struct dpu_hw_intf_ops {
        void (*setup_timing_gen)(struct dpu_hw_intf *intf,
@@ -77,6 +81,8 @@ struct dpu_hw_intf_ops {
        void (*bind_pingpong_blk)(struct dpu_hw_intf *intf,
                        bool enable,
                        const enum dpu_pingpong pp);
+       void (*setup_misr)(struct dpu_hw_intf *intf, bool enable, u32 frame_count);
+       int (*collect_misr)(struct dpu_hw_intf *intf, u32 *misr_value);
 };
 
 struct dpu_hw_intf {