[DPU PATCH] drm/msm: remove support for seamless modes

[Abhinav Kumar <abhinavk@codeaurora.org>]

Seamless modes are ones which do not require a display
to be turned OFF/ON between mode switches.

Remove support for seamless modes from DPU for now.

This will be added later based on additional requirements.

This change depends on the DPU custom property removal series:
 - https://patchwork.freedesktop.org/series/44592/

Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c    |  31 --------
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 106 +---------------------------
 drivers/gpu/drm/msm/msm_kms.h               |  44 ------------
 include/uapi/drm/drm_mode.h                 |   1 -
 4 files changed, 3 insertions(+), 179 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 4616a62..9ca8325 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -591,22 +591,6 @@ static void dpu_crtc_destroy(struct drm_crtc *crtc)
 	kfree(dpu_crtc);
 }
 
-static bool dpu_crtc_mode_fixup(struct drm_crtc *crtc,
-		const struct drm_display_mode *mode,
-		struct drm_display_mode *adjusted_mode)
-{
-	DPU_DEBUG("\n");
-
-	if ((msm_is_mode_seamless(adjusted_mode) ||
-			msm_is_mode_seamless_vrr(adjusted_mode)) &&
-		(!crtc->enabled)) {
-		DPU_ERROR("crtc state prevents seamless transition\n");
-		return false;
-	}
-
-	return true;
-}
-
 static void _dpu_crtc_setup_blend_cfg(struct dpu_crtc_mixer *mixer,
 		struct dpu_plane_state *pstate)
 {
@@ -1728,12 +1712,6 @@ static void dpu_crtc_disable(struct drm_crtc *crtc)
 	mode = &cstate->base.adjusted_mode;
 	priv = crtc->dev->dev_private;
 
-	if (msm_is_mode_seamless(mode) || msm_is_mode_seamless_vrr(mode) ||
-	    msm_is_mode_seamless_dms(mode)) {
-		DPU_DEBUG("Seamless mode is being applied, skip disable\n");
-		return;
-	}
-
 	DPU_DEBUG("crtc%d\n", crtc->base.id);
 
 	if (dpu_kms_is_suspend_state(crtc->dev))
@@ -1817,12 +1795,6 @@ static void dpu_crtc_enable(struct drm_crtc *crtc,
 	DPU_EVT32_VERBOSE(DRMID(crtc));
 	dpu_crtc = to_dpu_crtc(crtc);
 
-	if (msm_is_mode_seamless(&crtc->state->adjusted_mode) ||
-	    msm_is_mode_seamless_vrr(&crtc->state->adjusted_mode)) {
-		DPU_DEBUG("Skipping crtc enable, seamless mode\n");
-		return;
-	}
-
 	drm_for_each_encoder(encoder, crtc->dev) {
 		if (encoder->crtc != crtc)
 			continue;
@@ -1857,8 +1829,6 @@ static void dpu_crtc_enable(struct drm_crtc *crtc,
 		DPU_POWER_EVENT_PRE_DISABLE,
 		dpu_crtc_handle_power_event, crtc, dpu_crtc->name);
 
-	if (msm_needs_vblank_pre_modeset(&crtc->state->adjusted_mode))
-		drm_crtc_wait_one_vblank(crtc);
 }
 
 struct plane_state {
@@ -2497,7 +2467,6 @@ static void dpu_crtc_early_unregister(struct drm_crtc *crtc)
 };
 
 static const struct drm_crtc_helper_funcs dpu_crtc_helper_funcs = {
-	.mode_fixup = dpu_crtc_mode_fixup,
 	.disable = dpu_crtc_disable,
 	.atomic_enable = dpu_crtc_enable,
 	.atomic_check = dpu_crtc_atomic_check,
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 7dd609c..11a1045 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -96,15 +96,6 @@
  *	IDLE is expected when IDLE_PC has run, and PRE_OFF did nothing.
  *	PRE_OFF is expected when PRE_STOP was executed during the ON state.
  *	Resource state should be in OFF at the end of the event.
- * @DPU_ENC_RC_EVENT_PRE_MODESET:
- *	This event happens at NORMAL priority from a work item.
- *	Event signals that there is a seamless mode switch is in prgoress. A
- *	client needs to turn of only irq - leave clocks ON to reduce the mode
- *	switch latency.
- * @DPU_ENC_RC_EVENT_POST_MODESET:
- *	This event happens at NORMAL priority from a work item.
- *	Event signals that seamless mode switch is complete and resources are
- *	acquired. Clients wants to turn on the irq again.
  * @DPU_ENC_RC_EVENT_ENTER_IDLE:
  *	This event happens at NORMAL priority from a work item.
  *	Event signals that there were no frame updates for IDLE_TIMEOUT time.
@@ -116,8 +107,6 @@ enum dpu_enc_rc_events {
 	DPU_ENC_RC_EVENT_FRAME_DONE,
 	DPU_ENC_RC_EVENT_PRE_STOP,
 	DPU_ENC_RC_EVENT_STOP,
-	DPU_ENC_RC_EVENT_PRE_MODESET,
-	DPU_ENC_RC_EVENT_POST_MODESET,
 	DPU_ENC_RC_EVENT_ENTER_IDLE
 };
 
@@ -133,7 +122,6 @@ enum dpu_enc_rc_states {
 	DPU_ENC_RC_STATE_OFF,
 	DPU_ENC_RC_STATE_PRE_OFF,
 	DPU_ENC_RC_STATE_ON,
-	DPU_ENC_RC_STATE_MODESET,
 	DPU_ENC_RC_STATE_IDLE
 };
 
@@ -809,7 +797,6 @@ static int dpu_encoder_resource_control(struct drm_encoder *drm_enc,
 	struct dpu_encoder_virt *dpu_enc;
 	struct msm_drm_private *priv;
 	struct msm_drm_thread *disp_thread;
-	int ret;
 	bool is_vid_mode = false;
 
 	if (!drm_enc || !drm_enc->dev || !drm_enc->dev->dev_private ||
@@ -834,8 +821,6 @@ static int dpu_encoder_resource_control(struct drm_encoder *drm_enc,
 	 */
 	if (!dpu_enc->idle_pc_supported &&
 			(sw_event != DPU_ENC_RC_EVENT_KICKOFF &&
-			sw_event != DPU_ENC_RC_EVENT_PRE_MODESET &&
-			sw_event != DPU_ENC_RC_EVENT_POST_MODESET &&
 			sw_event != DPU_ENC_RC_EVENT_STOP &&
 			sw_event != DPU_ENC_RC_EVENT_PRE_STOP))
 		return 0;
@@ -966,8 +951,7 @@ static int dpu_encoder_resource_control(struct drm_encoder *drm_enc,
 				DPU_EVTLOG_FUNC_CASE4);
 			mutex_unlock(&dpu_enc->rc_lock);
 			return 0;
-		} else if (dpu_enc->rc_state == DPU_ENC_RC_STATE_ON ||
-			   dpu_enc->rc_state == DPU_ENC_RC_STATE_MODESET) {
+		} else if (dpu_enc->rc_state == DPU_ENC_RC_STATE_ON) {
 			DPU_ERROR_ENC(dpu_enc, "sw_event:%d, rc in state %d\n",
 					sw_event, dpu_enc->rc_state);
 			DPU_EVT32(DRMID(drm_enc), sw_event, dpu_enc->rc_state,
@@ -991,69 +975,6 @@ static int dpu_encoder_resource_control(struct drm_encoder *drm_enc,
 		mutex_unlock(&dpu_enc->rc_lock);
 		break;
 
-	case DPU_ENC_RC_EVENT_PRE_MODESET:
-		/* cancel delayed off work, if any */
-		if (kthread_cancel_delayed_work_sync(
-				&dpu_enc->delayed_off_work))
-			DPU_DEBUG_ENC(dpu_enc, "sw_event:%d, work cancelled\n",
-					sw_event);
-
-		mutex_lock(&dpu_enc->rc_lock);
-
-		/* return if the resource control is already in ON state */
-		if (dpu_enc->rc_state != DPU_ENC_RC_STATE_ON) {
-			/* enable all the clks and resources */
-			_dpu_encoder_resource_control_helper(drm_enc, true);
-
-			DPU_EVT32(DRMID(drm_enc), sw_event, dpu_enc->rc_state,
-				DPU_ENC_RC_STATE_ON, DPU_EVTLOG_FUNC_CASE5);
-			dpu_enc->rc_state = DPU_ENC_RC_STATE_ON;
-		}
-
-		ret = dpu_encoder_wait_for_event(drm_enc, MSM_ENC_TX_COMPLETE);
-		if (ret && ret != -EWOULDBLOCK) {
-			DPU_ERROR_ENC(dpu_enc,
-					"wait for commit done returned %d\n",
-					ret);
-			DPU_EVT32(DRMID(drm_enc), sw_event, dpu_enc->rc_state,
-					ret, DPU_EVTLOG_ERROR);
-			mutex_unlock(&dpu_enc->rc_lock);
-			return -EINVAL;
-		}
-
-		_dpu_encoder_irq_control(drm_enc, false);
-
-		DPU_EVT32(DRMID(drm_enc), sw_event, dpu_enc->rc_state,
-			DPU_ENC_RC_STATE_MODESET, DPU_EVTLOG_FUNC_CASE5);
-
-		dpu_enc->rc_state = DPU_ENC_RC_STATE_MODESET;
-		mutex_unlock(&dpu_enc->rc_lock);
-		break;
-
-	case DPU_ENC_RC_EVENT_POST_MODESET:
-		mutex_lock(&dpu_enc->rc_lock);
-
-		/* return if the resource control is already in ON state */
-		if (dpu_enc->rc_state != DPU_ENC_RC_STATE_MODESET) {
-			DPU_ERROR_ENC(dpu_enc,
-					"sw_event:%d, rc:%d !MODESET state\n",
-					sw_event, dpu_enc->rc_state);
-			DPU_EVT32(DRMID(drm_enc), sw_event, dpu_enc->rc_state,
-					DPU_EVTLOG_ERROR);
-			mutex_unlock(&dpu_enc->rc_lock);
-			return -EINVAL;
-		}
-
-		_dpu_encoder_irq_control(drm_enc, true);
-
-		DPU_EVT32(DRMID(drm_enc), sw_event, dpu_enc->rc_state,
-				DPU_ENC_RC_STATE_ON, DPU_EVTLOG_FUNC_CASE6);
-
-		dpu_enc->rc_state = DPU_ENC_RC_STATE_ON;
-
-		mutex_unlock(&dpu_enc->rc_lock);
-		break;
-
 	case DPU_ENC_RC_EVENT_ENTER_IDLE:
 		mutex_lock(&dpu_enc->rc_lock);
 
@@ -1180,11 +1101,6 @@ static void dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc,
 		}
 	}
 
-	/* update resources after seamless mode change */
-	if (msm_is_mode_seamless_dms(adj_mode))
-		dpu_encoder_resource_control(&dpu_enc->base,
-						DPU_ENC_RC_EVENT_POST_MODESET);
-
 	dpu_enc->mode_set_complete = true;
 }
 
@@ -1297,15 +1213,7 @@ static void dpu_encoder_virt_enable(struct drm_encoder *drm_enc)
 			continue;
 
 		if (phys != dpu_enc->cur_master) {
-			/**
-			 * on DMS request, the encoder will be enabled
-			 * already. Invoke restore to reconfigure the
-			 * new mode.
-			 */
-			if (msm_is_mode_seamless_dms(cur_mode) &&
-					phys->ops.restore)
-				phys->ops.restore(phys);
-			else if (phys->ops.enable)
+			if (phys->ops.enable)
 				phys->ops.enable(phys);
 		}
 
@@ -1315,10 +1223,7 @@ static void dpu_encoder_virt_enable(struct drm_encoder *drm_enc)
 						dpu_enc->misr_frame_count);
 	}
 
-	if (msm_is_mode_seamless_dms(cur_mode) &&
-			dpu_enc->cur_master->ops.restore)
-		dpu_enc->cur_master->ops.restore(dpu_enc->cur_master);
-	else if (dpu_enc->cur_master->ops.enable)
+	if (dpu_enc->cur_master->ops.enable)
 		dpu_enc->cur_master->ops.enable(dpu_enc->cur_master);
 
 	_dpu_encoder_virt_enable_helper(drm_enc);
@@ -1344,11 +1249,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
 	}
 
 	mode = &drm_enc->crtc->state->adjusted_mode;
-	if (msm_is_mode_seamless(mode) || msm_is_mode_seamless_vrr(mode) ||
-	    msm_is_mode_seamless_dms(mode)) {
-		DPU_DEBUG("Seamless mode is being applied, skip disable\n");
-		return;
-	}
 
 	dpu_enc = to_dpu_encoder_virt(drm_enc);
 	DPU_DEBUG_ENC(dpu_enc, "\n");
diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h
index 5e1de85..4544d0a 100644
--- a/drivers/gpu/drm/msm/msm_kms.h
+++ b/drivers/gpu/drm/msm/msm_kms.h
@@ -26,19 +26,6 @@
 
 #define MAX_PLANE	4
 
-/**
- * Device Private DRM Mode Flags
- * drm_mode->private_flags
- */
-/* Connector has interpreted seamless transition request as dynamic fps */
-#define MSM_MODE_FLAG_SEAMLESS_DYNAMIC_FPS	(1<<0)
-/* Transition to new mode requires a wait-for-vblank before the modeset */
-#define MSM_MODE_FLAG_VBLANK_PRE_MODESET	(1<<1)
-/* Request to switch the connector mode */
-#define MSM_MODE_FLAG_SEAMLESS_DMS			(1<<2)
-/* Request to switch the fps */
-#define MSM_MODE_FLAG_SEAMLESS_VRR			(1<<3)
-
 /* As there are different display controller blocks depending on the
  * snapdragon version, the kms support is split out and the appropriate
  * implementation is loaded at runtime.  The kms module is responsible
@@ -146,35 +133,4 @@ struct msm_mdss {
 int mdp5_mdss_init(struct drm_device *dev);
 int dpu_mdss_init(struct drm_device *dev);
 
-/**
- * Mode Set Utility Functions
- */
-static inline bool msm_is_mode_seamless(const struct drm_display_mode *mode)
-{
-	return (mode->flags & DRM_MODE_FLAG_SEAMLESS);
-}
-
-static inline bool msm_is_mode_seamless_dms(const struct drm_display_mode *mode)
-{
-	return mode ? (mode->private_flags & MSM_MODE_FLAG_SEAMLESS_DMS)
-		: false;
-}
-
-static inline bool msm_is_mode_dynamic_fps(const struct drm_display_mode *mode)
-{
-	return ((mode->flags & DRM_MODE_FLAG_SEAMLESS) &&
-		(mode->private_flags & MSM_MODE_FLAG_SEAMLESS_DYNAMIC_FPS));
-}
-
-static inline bool msm_is_mode_seamless_vrr(const struct drm_display_mode *mode)
-{
-	return mode ? (mode->private_flags & MSM_MODE_FLAG_SEAMLESS_VRR)
-		: false;
-}
-
-static inline bool msm_needs_vblank_pre_modeset(
-		const struct drm_display_mode *mode)
-{
-	return (mode->private_flags & MSM_MODE_FLAG_VBLANK_PRE_MODESET);
-}
 #endif /* __MSM_KMS_H__ */
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 4e1a3ff..50bcf42 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -88,7 +88,6 @@
 #define  DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH	(6<<14)
 #define  DRM_MODE_FLAG_3D_TOP_AND_BOTTOM	(7<<14)
 #define  DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF	(8<<14)
-#define  DRM_MODE_FLAG_SEAMLESS			(1<<19)
 
 /* Picture aspect ratio options */
 #define DRM_MODE_PICTURE_ASPECT_NONE		0
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

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