drm/msm/dpu: remove struct dpu_encoder_irq

Remove additional indirection: specify IRQ callbacks and IRQ indices
directly rather than through the pointer in the irq structure. For each
IRQ we have a constant IRQ callback. This change simplifies code review
as the reader no longer needs to remember which function is called.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/474700/
Link: https://lore.kernel.org/r/20220217043148.480898-6-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

1 files changed, 26 insertions, 48 deletions

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 9875ac77eda8..d7f787070469 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
@@ -140,19 +140,13 @@ static void dpu_encoder_phys_cmd_atomic_mode_set(
 		struct drm_crtc_state *crtc_state,
 		struct drm_connector_state *conn_state)
 {
-	struct dpu_encoder_irq *irq;
+	phys_enc->irq[INTR_IDX_CTL_START] = phys_enc->hw_ctl->caps->intr_start;
 
-	irq = &phys_enc->irq[INTR_IDX_CTL_START];
-	irq->irq_idx = phys_enc->hw_ctl->caps->intr_start;
+	phys_enc->irq[INTR_IDX_PINGPONG] = phys_enc->hw_pp->caps->intr_done;
 
-	irq = &phys_enc->irq[INTR_IDX_PINGPONG];
-	irq->irq_idx = phys_enc->hw_pp->caps->intr_done;
+	phys_enc->irq[INTR_IDX_RDPTR] = phys_enc->hw_pp->caps->intr_rdptr;
 
-	irq = &phys_enc->irq[INTR_IDX_RDPTR];
-	irq->irq_idx = phys_enc->hw_pp->caps->intr_rdptr;
-
-	irq = &phys_enc->irq[INTR_IDX_UNDERRUN];
-	irq->irq_idx = phys_enc->hw_intf->cap->intr_underrun;
+	phys_enc->irq[INTR_IDX_UNDERRUN] = phys_enc->hw_intf->cap->intr_underrun;
 }
 
 static int _dpu_encoder_phys_cmd_handle_ppdone_timeout(
@@ -193,7 +187,7 @@ static int _dpu_encoder_phys_cmd_handle_ppdone_timeout(
 			  atomic_read(&phys_enc->pending_kickoff_cnt));
 		msm_disp_snapshot_state(drm_enc->dev);
 		dpu_core_irq_unregister_callback(phys_enc->dpu_kms,
-				phys_enc->irq[INTR_IDX_RDPTR].irq_idx);
+				phys_enc->irq[INTR_IDX_RDPTR]);
 	}
 
 	atomic_add_unless(&phys_enc->pending_kickoff_cnt, -1, 0);
@@ -221,6 +215,7 @@ static int _dpu_encoder_phys_cmd_wait_for_idle(
 	wait_info.timeout_ms = KICKOFF_TIMEOUT_MS;
 
 	ret = dpu_encoder_helper_wait_for_irq(phys_enc, INTR_IDX_PINGPONG,
+			dpu_encoder_phys_cmd_pp_tx_done_irq,
 			&wait_info);
 	if (ret == -ETIMEDOUT)
 		_dpu_encoder_phys_cmd_handle_ppdone_timeout(phys_enc);
@@ -260,11 +255,12 @@ static int dpu_encoder_phys_cmd_control_vblank_irq(
 
 	if (enable && atomic_inc_return(&phys_enc->vblank_refcount) == 1)
 		ret = dpu_core_irq_register_callback(phys_enc->dpu_kms,
-				phys_enc->irq[INTR_IDX_RDPTR].irq_idx,
-				phys_enc->irq[INTR_IDX_RDPTR].func, phys_enc);
+				phys_enc->irq[INTR_IDX_RDPTR],
+				dpu_encoder_phys_cmd_pp_rd_ptr_irq,
+				phys_enc);
 	else if (!enable && atomic_dec_return(&phys_enc->vblank_refcount) == 0)
 		ret = dpu_core_irq_unregister_callback(phys_enc->dpu_kms,
-				phys_enc->irq[INTR_IDX_RDPTR].irq_idx);
+				phys_enc->irq[INTR_IDX_RDPTR]);
 
 end:
 	if (ret) {
@@ -286,27 +282,30 @@ static void dpu_encoder_phys_cmd_irq_control(struct dpu_encoder_phys *phys_enc,
 
 	if (enable) {
 		dpu_core_irq_register_callback(phys_enc->dpu_kms,
-				phys_enc->irq[INTR_IDX_PINGPONG].irq_idx,
-				phys_enc->irq[INTR_IDX_PINGPONG].func, phys_enc);
+				phys_enc->irq[INTR_IDX_PINGPONG],
+				dpu_encoder_phys_cmd_pp_tx_done_irq,
+				phys_enc);
 		dpu_core_irq_register_callback(phys_enc->dpu_kms,
-				phys_enc->irq[INTR_IDX_UNDERRUN].irq_idx,
-				phys_enc->irq[INTR_IDX_UNDERRUN].func, phys_enc);
+				phys_enc->irq[INTR_IDX_UNDERRUN],
+				dpu_encoder_phys_cmd_underrun_irq,
+				phys_enc);
 		dpu_encoder_phys_cmd_control_vblank_irq(phys_enc, true);
 
 		if (dpu_encoder_phys_cmd_is_master(phys_enc))
 			dpu_core_irq_register_callback(phys_enc->dpu_kms,
-					phys_enc->irq[INTR_IDX_CTL_START].irq_idx,
-					phys_enc->irq[INTR_IDX_CTL_START].func, phys_enc);
+					phys_enc->irq[INTR_IDX_CTL_START],
+					dpu_encoder_phys_cmd_ctl_start_irq,
+					phys_enc);
 	} else {
 		if (dpu_encoder_phys_cmd_is_master(phys_enc))
 			dpu_core_irq_unregister_callback(phys_enc->dpu_kms,
-					phys_enc->irq[INTR_IDX_CTL_START].irq_idx);
+					phys_enc->irq[INTR_IDX_CTL_START]);
 
 		dpu_core_irq_unregister_callback(phys_enc->dpu_kms,
-				phys_enc->irq[INTR_IDX_UNDERRUN].irq_idx);
+				phys_enc->irq[INTR_IDX_UNDERRUN]);
 		dpu_encoder_phys_cmd_control_vblank_irq(phys_enc, false);
 		dpu_core_irq_unregister_callback(phys_enc->dpu_kms,
-				phys_enc->irq[INTR_IDX_PINGPONG].irq_idx);
+				phys_enc->irq[INTR_IDX_PINGPONG]);
 	}
 }
 
@@ -634,6 +633,7 @@ static int _dpu_encoder_phys_cmd_wait_for_ctl_start(
 	wait_info.timeout_ms = KICKOFF_TIMEOUT_MS;
 
 	ret = dpu_encoder_helper_wait_for_irq(phys_enc, INTR_IDX_CTL_START,
+			dpu_encoder_phys_cmd_ctl_start_irq,
 			&wait_info);
 	if (ret == -ETIMEDOUT) {
 		DPU_ERROR_CMDENC(cmd_enc, "ctl start interrupt wait failed\n");
@@ -692,6 +692,7 @@ static int dpu_encoder_phys_cmd_wait_for_vblank(
 	atomic_inc(&cmd_enc->pending_vblank_cnt);
 
 	rc = dpu_encoder_helper_wait_for_irq(phys_enc, INTR_IDX_RDPTR,
+			dpu_encoder_phys_cmd_pp_rd_ptr_irq,
 			&wait_info);
 
 	return rc;
@@ -741,7 +742,6 @@ struct dpu_encoder_phys *dpu_encoder_phys_cmd_init(
 {
 	struct dpu_encoder_phys *phys_enc = NULL;
 	struct dpu_encoder_phys_cmd *cmd_enc = NULL;
-	struct dpu_encoder_irq *irq;
 	int i, ret = 0;
 
 	DPU_DEBUG("intf %d\n", p->intf_idx - INTF_0);
@@ -765,30 +765,8 @@ struct dpu_encoder_phys *dpu_encoder_phys_cmd_init(
 	phys_enc->enc_spinlock = p->enc_spinlock;
 	cmd_enc->stream_sel = 0;
 	phys_enc->enable_state = DPU_ENC_DISABLED;
-	for (i = 0; i < INTR_IDX_MAX; i++) {
-		irq = &phys_enc->irq[i];
-		irq->irq_idx = -EINVAL;
-	}
-
-	irq = &phys_enc->irq[INTR_IDX_CTL_START];
-	irq->name = "ctl_start";
-	irq->intr_idx = INTR_IDX_CTL_START;
-	irq->func = dpu_encoder_phys_cmd_ctl_start_irq;
-
-	irq = &phys_enc->irq[INTR_IDX_PINGPONG];
-	irq->name = "pp_done";
-	irq->intr_idx = INTR_IDX_PINGPONG;
-	irq->func = dpu_encoder_phys_cmd_pp_tx_done_irq;
-
-	irq = &phys_enc->irq[INTR_IDX_RDPTR];
-	irq->name = "pp_rd_ptr";
-	irq->intr_idx = INTR_IDX_RDPTR;
-	irq->func = dpu_encoder_phys_cmd_pp_rd_ptr_irq;
-
-	irq = &phys_enc->irq[INTR_IDX_UNDERRUN];
-	irq->name = "underrun";
-	irq->intr_idx = INTR_IDX_UNDERRUN;
-	irq->func = dpu_encoder_phys_cmd_underrun_irq;
+	for (i = 0; i < ARRAY_SIZE(phys_enc->irq); i++)
+		phys_enc->irq[i] = -EINVAL;
 
 	atomic_set(&phys_enc->vblank_refcount, 0);
 	atomic_set(&phys_enc->pending_kickoff_cnt, 0);