Re: [RFC PATCH 5/7] drm/msm/dpu: Document and enable TEAR interrupts on DSI interfaces

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On 12/31/2022 1:50 PM, Marijn Suijten wrote:

All SoCs since DPU 5.0.0 (and seemingly up until and including 6.0.0,
but excluding 7.x.x) have the tear interrupt and control registers moved
out of the PINGPONG block and into the INTF block.  Wire up the
necessary interrupts and IRQ masks on all supported hardware.


Hi Marijn,

Thanks for the patch.
I saw that in your commit msg, you mentioned that 7.x doesn't have tearcheck in the INTF block -- can you double check that this is correct?
I'm working on SM8350 (DPU v7) and I'm seeing that it does have tearcheck in INTF block. 



Signed-off-by: Marijn Suijten <marijn.suijten@xxxxxxxxxxxxxx>
---
  .../gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c    | 78 +++++++++++--------
  .../gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h    |  6 +-
  .../gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c | 12 +++
  .../gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h |  2 +
  drivers/gpu/drm/msm/disp/dpu1/dpu_hwio.h      |  3 +
  5 files changed, 68 insertions(+), 33 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
index 1cfe94494135..b9b9b5b0b615 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
@@ -86,6 +86,15 @@
#define INTF_SC7280_MASK INTF_SC7180_MASK | BIT(DPU_DATA_HCTL_EN) +#define IRQ_MSM8998_MASK (BIT(MDP_SSPP_TOP0_INTR) | \ 
+			 BIT(MDP_SSPP_TOP0_INTR2) | \
+			 BIT(MDP_SSPP_TOP0_HIST_INTR) | \
+			 BIT(MDP_INTF0_INTR) | \
+			 BIT(MDP_INTF1_INTR) | \
+			 BIT(MDP_INTF2_INTR) | \
+			 BIT(MDP_INTF3_INTR) | \
+			 BIT(MDP_INTF4_INTR))
+
  #define IRQ_SDM845_MASK (BIT(MDP_SSPP_TOP0_INTR) | \
  			 BIT(MDP_SSPP_TOP0_INTR2) | \
  			 BIT(MDP_SSPP_TOP0_HIST_INTR) | \
@@ -100,13 +109,15 @@
  #define IRQ_QCM2290_MASK (BIT(MDP_SSPP_TOP0_INTR) | \
  			 BIT(MDP_SSPP_TOP0_INTR2) | \
  			 BIT(MDP_SSPP_TOP0_HIST_INTR) | \
-			 BIT(MDP_INTF1_INTR))
+			 BIT(MDP_INTF1_INTR) | \
+			 BIT(MDP_INTF1_TEAR_INTR))
#define IRQ_SC7180_MASK (BIT(MDP_SSPP_TOP0_INTR) | \ 
  			 BIT(MDP_SSPP_TOP0_INTR2) | \
  			 BIT(MDP_SSPP_TOP0_HIST_INTR) | \
  			 BIT(MDP_INTF0_INTR) | \
-			 BIT(MDP_INTF1_INTR))
+			 BIT(MDP_INTF1_INTR) | \
+			 BIT(MDP_INTF1_TEAR_INTR))
#define IRQ_SC7280_MASK (BIT(MDP_SSPP_TOP0_INTR) | \ 
  			 BIT(MDP_SSPP_TOP0_INTR2) | \
@@ -120,7 +131,9 @@
  			 BIT(MDP_SSPP_TOP0_HIST_INTR) | \
  			 BIT(MDP_INTF0_INTR) | \
  			 BIT(MDP_INTF1_INTR) | \
+			 BIT(MDP_INTF1_TEAR_INTR) | \
  			 BIT(MDP_INTF2_INTR) | \
+			 BIT(MDP_INTF2_TEAR_INTR) | \
  			 BIT(MDP_INTF3_INTR) | \
  			 BIT(MDP_INTF4_INTR))
@@ -129,7 +142,9 @@ 
  			  BIT(MDP_SSPP_TOP0_HIST_INTR) | \
  			  BIT(MDP_INTF0_INTR) | \
  			  BIT(MDP_INTF1_INTR) | \
+			  BIT(MDP_INTF1_TEAR_INTR) | \
  			  BIT(MDP_INTF2_INTR) | \
+			  BIT(MDP_INTF2_TEAR_INTR) | \
  			  BIT(MDP_INTF3_INTR) | \
  			  BIT(MDP_INTF4_INTR) | \
  			  BIT(MDP_INTF5_INTR) | \
@@ -1300,63 +1315,64 @@ static struct dpu_dsc_cfg sdm845_dsc[] = {
  /*************************************************************
   * INTF sub blocks config
   *************************************************************/
-#define INTF_BLK(_name, _id, _base, _type, _ctrl_id, _progfetch, _features, _reg, _underrun_bit, _vsync_bit) \
+#define INTF_BLK(_name, _id, _base, _len, _type, _ctrl_id, _progfetch, _features, _reg, _underrun_bit, _vsync_bit, _tear_reg, _tear_rd_ptr_bit) \
  	{\
  	.name = _name, .id = _id, \
-	.base = _base, .len = 0x280, \
+	.base = _base, .len = _len, \
  	.features = _features, \
  	.type = _type, \
  	.controller_id = _ctrl_id, \
  	.prog_fetch_lines_worst_case = _progfetch, \
  	.intr_underrun = DPU_IRQ_IDX(_reg, _underrun_bit), \
  	.intr_vsync = DPU_IRQ_IDX(_reg, _vsync_bit), \
+	.intr_tear_rd_ptr = DPU_IRQ_IDX(_tear_reg, _tear_rd_ptr_bit), \
  	}
static const struct dpu_intf_cfg msm8998_intf[] = { 
-	INTF_BLK("intf_0", INTF_0, 0x6A000, INTF_DP, 0, 25, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 24, 25),
-	INTF_BLK("intf_1", INTF_1, 0x6A800, INTF_DSI, 0, 25, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 26, 27),
-	INTF_BLK("intf_2", INTF_2, 0x6B000, INTF_DSI, 1, 25, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 28, 29),
-	INTF_BLK("intf_3", INTF_3, 0x6B800, INTF_HDMI, 0, 25, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 30, 31),
+	INTF_BLK("intf_0", INTF_0, 0x6A000, 0x268, INTF_DP, 0, 25, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 24, 25, -1, -1),
Just wondering, how were the lengths calculated for the INTF blocks? The values in general seem a little off to me.
For example, I'm looking downstream and it seems to me that the length for the INTF_0 on MSM8998 should be 0x280. Similarly for SC7280, I'm seeing that length for INTF + tearcheck should be 0x2c4. 

Thanks,

Jessica Zhang


+	INTF_BLK("intf_1", INTF_1, 0x6A800, 0x268, INTF_DSI, 0, 25, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 26, 27, -1, -1),
+	INTF_BLK("intf_2", INTF_2, 0x6B000, 0x268, INTF_DSI, 1, 25, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 28, 29, -1, -1),
+	INTF_BLK("intf_3", INTF_3, 0x6B800, 0x268, INTF_HDMI, 0, 25, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 30, 31, -1, -1),
  };
static const struct dpu_intf_cfg sdm845_intf[] = { 
-	INTF_BLK("intf_0", INTF_0, 0x6A000, INTF_DP, 0, 24, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 24, 25),
-	INTF_BLK("intf_1", INTF_1, 0x6A800, INTF_DSI, 0, 24, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 26, 27),
-	INTF_BLK("intf_2", INTF_2, 0x6B000, INTF_DSI, 1, 24, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 28, 29),
-	INTF_BLK("intf_3", INTF_3, 0x6B800, INTF_DP, 1, 24, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 30, 31),
+	INTF_BLK("intf_0", INTF_0, 0x6A000, 0x280, INTF_DP, 0, 24, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 24, 25, -1, -1),
+	INTF_BLK("intf_1", INTF_1, 0x6A800, 0x280, INTF_DSI, 0, 24, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 26, 27, -1, -1),
+	INTF_BLK("intf_2", INTF_2, 0x6B000, 0x280, INTF_DSI, 1, 24, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 28, 29, -1, -1),
+	INTF_BLK("intf_3", INTF_3, 0x6B800, 0x280, INTF_DP, 1, 24, INTF_SDM845_MASK, MDP_SSPP_TOP0_INTR, 30, 31, -1, -1),
  };
static const struct dpu_intf_cfg sc7180_intf[] = { 
-	INTF_BLK("intf_0", INTF_0, 0x6A000, INTF_DP, MSM_DP_CONTROLLER_0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 24, 25),
-	INTF_BLK("intf_1", INTF_1, 0x6A800, INTF_DSI, 0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 26, 27),
+	INTF_BLK("intf_0", INTF_0, 0x6A000, 0x280, INTF_DP, MSM_DP_CONTROLLER_0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 24, 25, -1, -1),
+	INTF_BLK("intf_1", INTF_1, 0x6A800, 0x2b8, INTF_DSI, 0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 26, 27, MDP_INTF1_TEAR_INTR, 2),
  };
static const struct dpu_intf_cfg sm8150_intf[] = { 
-	INTF_BLK("intf_0", INTF_0, 0x6A000, INTF_DP, 0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 24, 25),
-	INTF_BLK("intf_1", INTF_1, 0x6A800, INTF_DSI, 0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 26, 27),
-	INTF_BLK("intf_2", INTF_2, 0x6B000, INTF_DSI, 1, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 28, 29),
-	INTF_BLK("intf_3", INTF_3, 0x6B800, INTF_DP, 1, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 30, 31),
+	INTF_BLK("intf_0", INTF_0, 0x6A000, 0x280, INTF_DP, 0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 24, 25, -1, -1),
+	INTF_BLK("intf_1", INTF_1, 0x6A800, 0x2b8, INTF_DSI, 0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 26, 27, MDP_INTF1_TEAR_INTR, 2),
+	INTF_BLK("intf_2", INTF_2, 0x6B000, 0x2b8, INTF_DSI, 1, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 28, 29, MDP_INTF2_TEAR_INTR, 2),
+	INTF_BLK("intf_3", INTF_3, 0x6B800, 0x280, INTF_DP, 1, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 30, 31, -1, -1),
  };
static const struct dpu_intf_cfg sc7280_intf[] = { 
-	INTF_BLK("intf_0", INTF_0, 0x34000, INTF_DP, MSM_DP_CONTROLLER_0, 24, INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 24, 25),
-	INTF_BLK("intf_1", INTF_1, 0x35000, INTF_DSI, 0, 24, INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 26, 27),
-	INTF_BLK("intf_5", INTF_5, 0x39000, INTF_DP, MSM_DP_CONTROLLER_1, 24, INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 22, 23),
+	INTF_BLK("intf_0", INTF_0, 0x34000, 0x280, INTF_DP, MSM_DP_CONTROLLER_0, 24, INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 24, 25, -1, -1),
+	INTF_BLK("intf_1", INTF_1, 0x35000, 0x2b8, INTF_DSI, 0, 24, INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 26, 27, MDP_INTF1_TEAR_INTR, 2),
+	INTF_BLK("intf_5", INTF_5, 0x39000, 0x280, INTF_DP, MSM_DP_CONTROLLER_1, 24, INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 22, 23, -1, -1),
  };
static const struct dpu_intf_cfg sc8180x_intf[] = { 
-	INTF_BLK("intf_0", INTF_0, 0x6A000, INTF_DP, MSM_DP_CONTROLLER_0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 24, 25),
-	INTF_BLK("intf_1", INTF_1, 0x6A800, INTF_DSI, 0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 26, 27),
-	INTF_BLK("intf_2", INTF_2, 0x6B000, INTF_DSI, 1, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 28, 29),
+	INTF_BLK("intf_0", INTF_0, 0x6A000, 0x280, INTF_DP, MSM_DP_CONTROLLER_0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 24, 25, -1, -1),
+	INTF_BLK("intf_1", INTF_1, 0x6A800, 0x2b8, INTF_DSI, 0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 26, 27, MDP_INTF1_TEAR_INTR, 2),
+	INTF_BLK("intf_2", INTF_2, 0x6B000, 0x2b8, INTF_DSI, 1, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 28, 29, MDP_INTF2_TEAR_INTR, 2),
  	/* INTF_3 is for MST, wired to INTF_DP 0 and 1, use dummy index until this is supported */
-	INTF_BLK("intf_3", INTF_3, 0x6B800, INTF_DP, 999, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 30, 31),
-	INTF_BLK("intf_4", INTF_4, 0x6C000, INTF_DP, MSM_DP_CONTROLLER_1, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 20, 21),
-	INTF_BLK("intf_5", INTF_5, 0x6C800, INTF_DP, MSM_DP_CONTROLLER_2, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 22, 23),
+	INTF_BLK("intf_3", INTF_3, 0x6B800, 0x280, INTF_DP, 999, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 30, 31, -1, -1),
+	INTF_BLK("intf_4", INTF_4, 0x6C000, 0x280, INTF_DP, MSM_DP_CONTROLLER_1, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 20, 21, -1, -1),
+	INTF_BLK("intf_5", INTF_5, 0x6C800, 0x280, INTF_DP, MSM_DP_CONTROLLER_2, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 22, 23, -1, -1),
  };
static const struct dpu_intf_cfg qcm2290_intf[] = { 
-	INTF_BLK("intf_0", INTF_0, 0x00000, INTF_NONE, 0, 0, 0, 0, 0, 0),
-	INTF_BLK("intf_1", INTF_1, 0x6A800, INTF_DSI, 0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 26, 27),
+	INTF_BLK("intf_0", INTF_0, 0x00000, 0x2b8, INTF_NONE, 0, 0, 0, 0, 0, 0, -1, -1),
+	INTF_BLK("intf_1", INTF_1, 0x6A800, 0x2b8, INTF_DSI, 0, 24, INTF_SC7180_MASK, MDP_SSPP_TOP0_INTR, 26, 27, MDP_INTF2_TEAR_INTR, 2),
  };
/************************************************************* 
@@ -1849,7 +1865,7 @@ static const struct dpu_mdss_cfg msm8998_dpu_cfg = {
  	.vbif = msm8998_vbif,
  	.reg_dma_count = 0,
  	.perf = &msm8998_perf_data,
-	.mdss_irqs = IRQ_SM8250_MASK,
+	.mdss_irqs = IRQ_MSM8998_MASK,
  };
static const struct dpu_mdss_cfg sdm845_dpu_cfg = { 
@@ -1947,7 +1963,7 @@ static const struct dpu_mdss_cfg sm8150_dpu_cfg = {
  	.reg_dma_count = 1,
  	.dma_cfg = &sm8150_regdma,
  	.perf = &sm8150_perf_data,
-	.mdss_irqs = IRQ_SDM845_MASK,
+	.mdss_irqs = IRQ_SM8250_MASK,
  };
static const struct dpu_mdss_cfg sc8180x_dpu_cfg = { 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
index e0e153889ab7..2ea17e4ef3e5 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
@@ -638,8 +638,9 @@ struct dpu_dsc_cfg {
   * @type:              Interface type(DSI, DP, HDMI)
   * @controller_id:     Controller Instance ID in case of multiple of intf type
   * @prog_fetch_lines_worst_case	Worst case latency num lines needed to prefetch
- * @intr_underrun:	index for INTF underrun interrupt
- * @intr_vsync:	        index for INTF VSYNC interrupt
+ * @intr_underrun:     index for INTF underrun interrupt
+ * @intr_vsync:        index for INTF VSYNC interrupt
+ * @intr_tear_rd_ptr:  index for INTF TEAR_RD_PTR interrupt
   */
  struct dpu_intf_cfg  {
  	DPU_HW_BLK_INFO;
@@ -648,6 +649,7 @@ struct dpu_intf_cfg  {
  	u32 prog_fetch_lines_worst_case;
  	s32 intr_underrun;
  	s32 intr_vsync;
+	s32 intr_tear_rd_ptr;
  };
/** 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
index cf1b6d84c18a..044136a97fac 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
@@ -24,6 +24,8 @@
  #define MDP_INTF_3_OFF			0x6B800
  #define MDP_INTF_4_OFF			0x6C000
  #define MDP_INTF_5_OFF			0x6C800
+#define MDP_INTF_1_TEAR_OFF		0x6D800
+#define MDP_INTF_2_TEAR_OFF		0x6D900
  #define MDP_AD4_0_OFF			0x7C000
  #define MDP_AD4_1_OFF			0x7D000
  #define MDP_AD4_INTR_EN_OFF		0x41c
@@ -99,6 +101,16 @@ static const struct dpu_intr_reg dpu_intr_set[] = {
  		MDP_INTF_5_OFF+INTF_INTR_EN,
  		MDP_INTF_5_OFF+INTF_INTR_STATUS
  	},
+	[MDP_INTF1_TEAR_INTR] = {
+		MDP_INTF_1_TEAR_OFF+INTF_INTR_TEAR_CLEAR,
+		MDP_INTF_1_TEAR_OFF+INTF_INTR_TEAR_EN,
+		MDP_INTF_1_TEAR_OFF+INTF_INTR_TEAR_STATUS
+	},
+	[MDP_INTF2_TEAR_INTR] = {
+		MDP_INTF_2_TEAR_OFF+INTF_INTR_TEAR_CLEAR,
+		MDP_INTF_2_TEAR_OFF+INTF_INTR_TEAR_EN,
+		MDP_INTF_2_TEAR_OFF+INTF_INTR_TEAR_STATUS
+	},
  	[MDP_AD4_0_INTR] = {
  		MDP_AD4_0_OFF + MDP_AD4_INTR_CLEAR_OFF,
  		MDP_AD4_0_OFF + MDP_AD4_INTR_EN_OFF,
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
index 46443955443c..b447e4a1d9f4 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
@@ -23,6 +23,8 @@ enum dpu_hw_intr_reg {
  	MDP_INTF3_INTR,
  	MDP_INTF4_INTR,
  	MDP_INTF5_INTR,
+	MDP_INTF1_TEAR_INTR,
+	MDP_INTF2_TEAR_INTR,
  	MDP_AD4_0_INTR,
  	MDP_AD4_1_INTR,
  	MDP_INTF0_7xxx_INTR,
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hwio.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hwio.h
index c8156ed4b7fb..6bdac515fd54 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hwio.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hwio.h
@@ -10,6 +10,9 @@
  /**
   * MDP TOP block Register and bit fields and defines
   */
+#define INTF_INTR_TEAR_EN               0x000
+#define INTF_INTR_TEAR_STATUS           0x004
+#define INTF_INTR_TEAR_CLEAR            0x008
  #define DISP_INTF_SEL                   0x004
  #define INTR_EN                         0x010
  #define INTR_STATUS                     0x014
--
2.39.0
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