disp: msm: sde: update wb irq ctrl with a distinct dcwb irq table

With dedicated concurrent write back feature enabled, only one
cwb overflow irq is initialized. However, the table has not been
updated to reflect this. This can result in bad attempts to
register unavailable overflow irqs for different pingpongs.

This change creates a new dcwb irq table to be used when
dcwb is enabled.

Change-Id: Ib683b4cdaea2d2fe4f1131b92b1abaa096fa2cc0
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>

msm/sde/sde_encoder_phys_wb.c

@@ -30,7 +30,11 @@
 
 static const u32 cwb_irq_tbl[PINGPONG_MAX] = {SDE_NONE, INTR_IDX_PP1_OVFL,
 	INTR_IDX_PP2_OVFL, INTR_IDX_PP3_OVFL, INTR_IDX_PP4_OVFL,
-	INTR_IDX_PP5_OVFL, INTR_IDX_PP_CWB_OVFL, SDE_NONE};
+	INTR_IDX_PP5_OVFL, SDE_NONE, SDE_NONE};
+
+static const u32 dcwb_irq_tbl[PINGPONG_MAX] = {SDE_NONE, SDE_NONE,
+	SDE_NONE, SDE_NONE, SDE_NONE, SDE_NONE,
+	INTR_IDX_PP_CWB_OVFL, SDE_NONE};
 
 /**
  * sde_rgb2yuv_601l - rgb to yuv color space conversion matrix
@@ -1208,6 +1212,7 @@ static void sde_encoder_phys_wb_irq_ctrl(
 	int index = 0, refcount;
 	int ret = 0, pp = 0;
 	u32 max_num_of_irqs = 0;
+	const u32 *irq_table = NULL;
 
 	if (!wb_enc)
 		return;
@@ -1228,8 +1233,13 @@ static void sde_encoder_phys_wb_irq_ctrl(
 	 * when D-CWB is enabled.
 	 */
 	wb_cfg = wb_enc->hw_wb->caps;
-	max_num_of_irqs = (wb_cfg->features & BIT(SDE_WB_HAS_DCWB)) ?
-					1 : CRTC_DUAL_MIXERS_ONLY;
+	if (wb_cfg->features & BIT(SDE_WB_HAS_DCWB)) {
+		max_num_of_irqs = 1;
+		irq_table = dcwb_irq_tbl;
+	} else {
+		max_num_of_irqs = CRTC_DUAL_MIXERS_ONLY;
+		irq_table = cwb_irq_tbl;
+	}
 
 	if (enable && atomic_inc_return(&phys->wbirq_refcount) == 1) {
 		sde_encoder_helper_register_irq(phys, INTR_IDX_WB_DONE);
@@ -1237,9 +1247,9 @@ static void sde_encoder_phys_wb_irq_ctrl(
 			atomic_dec_return(&phys->wbirq_refcount);
 
 		for (index = 0; index < max_num_of_irqs; index++)
-			if (cwb_irq_tbl[index + pp] != SDE_NONE)
+			if (irq_table[index + pp] != SDE_NONE)
 				sde_encoder_helper_register_irq(phys,
-					cwb_irq_tbl[index + pp]);
+					irq_table[index + pp]);
 	} else if (!enable &&
 			atomic_dec_return(&phys->wbirq_refcount) == 0) {
 		sde_encoder_helper_unregister_irq(phys, INTR_IDX_WB_DONE);
@@ -1247,9 +1257,9 @@ static void sde_encoder_phys_wb_irq_ctrl(
 			atomic_inc_return(&phys->wbirq_refcount);
 
 		for (index = 0; index < max_num_of_irqs; index++)
-			if (cwb_irq_tbl[index + pp] != SDE_NONE)
+			if (irq_table[index + pp] != SDE_NONE)
 				sde_encoder_helper_unregister_irq(phys,
-					cwb_irq_tbl[index + pp]);
+					irq_table[index + pp]);
 	}
 }